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Graphene-like -BN supported polyhedral NiS/NiS nanocrystals with excellent photocatalytic performance

《化学科学与工程前沿（英文）》 2021年 第15卷 第6期   页码 1537-1549 doi: 10.1007/s11705-021-2094-2

摘要： Human health is deteriorating due to the effluent containing heavy metal ions and organic dyes. Hence, photoreduction of Cr(VI) to Cr(III) and degradation of rhodamine B (RhB) using a novel photocatalyst is particularly important. In this work, h-BN/NiS2/NiS composites were prepared via a simple solvothermal method and a double Z-scheme heterojunction was constructed for efficiently removing RhB and Cr(VI). The 7 wt-% h-BN/NiS2/NiS composites were characterized via a larger specific surface area (15.12 m2·g–1), stronger light absorption capacity, excellent chemical stability, and high yield of electrons and holes. The experimental result indicated that the photoreduction efficiency of the 7 wt-% h-BN/NiS2/NiS photocatalyst achieved 98.5% for Cr(VI) after 120 min, which was about 3 times higher than that of NiS2/NiS (34%). However, the removal rate of RhB by the 7 wt-% h-BN/NiS2/NiS photocatalyst reached 80%. This is due to the double Z-scheme heterojunction formed between NiS2/NiS and h-BN, which improved the charge separation efficiency and transmission efficiency. Besides, the influence of diverse photogenerated electron and hole scavengers upon the photoreduction of Cr(VI) was studied, the results indicated that graphene-like h-BN promoted transportation of photoinduced charges on the surface of the h-BN/NiS2/NiS photocatalyst via the interfacial effects.

关键词： graphene-like h-BN     h-BN/NiS2/NiS composites     photocatalysis     Cr(VI) reduction     degradation of RhB    

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Photocatalytic water splitting of ternary graphene-like photocatalyst for the photocatalytic hydrogen

Yan Zhang, Yuyan Zhang, Xue Li, Xiaohan Zhao, Cosmos Anning, John Crittenden, Xianjun Lyu

《环境科学与工程前沿（英文）》 2020年 第14卷 第4期 doi: 10.1007/s11783-020-1248-7

摘要： Abstract •The MoS2/SiC/GO composite has a strong photocatalytic activity than SiC. •The optimal catalyst yielded the highest quantum of 21.69%. •GO acts as a bridge for electron passage in photocatalytic reaction. In recent times, therehas been an increasing demand for energy which has resulted in an increased consumption of fossil fuels thereby posing a number of challenges to the environment. In the course finding possible solutions to this environmental canker, solar photocatalytic water splitting to produce hydrogengas has been identified as one of the most promising methods for generating renewable energy. To retard the recombination of photogenerated carriers and improve the efficiencyof photocatalysis, the present paper reports a facile method called the hydrothermal method, which was used to prepare ternary graphene-like photocatalyst. A “Design Expert” was used to investigate the influence of the loading weight of Mo and GO as well as the temperature of hydrothermal reaction and their interactions on the evolution of hydrogen (H2) in 4 h. The experimental results showed that the ternary graphene-like photocatalyst has a strong photocatalytic hydrogen production activity compared to that of pure SiC. In particular, the catalyst added 2.5 wt% of GO weight yielded the highest quantum of 21.69 % at 400–700 nm of wavelength. The optimal evolution H2 in 4 h conditions wasobtained as follows: The loading weight of Mo was 8.19 wt%, the loading weight of GO was 2.02 wt%, the temperature of the hydrothermal reaction was 200.93°C. Under the optimum conditions, the evolution of H2 in 4 h could reach 4.2030 mL.

关键词： Water splitting     Visible light     Graphene-like photocatalyst     Response surface methodology    

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Bamboo-like -doped carbon nanotubes encapsulating M(Co, Fe)-Ni alloy for electrochemical production ofsyngas with potential-independent CO/H ratios

《化学科学与工程前沿（英文）》 2022年 第16卷 第4期   页码 498-510 doi: 10.1007/s11705-021-2082-6

摘要： The electrochemical conversion of CO2-H2O into CO-H2 using renewable energy is a promising technique for clean syngas production. Low-cost electrocatalysts to produce tunable syngas with a potential-independent CO/H2 ratio are highly desired. Herein, a series of N-doped carbon nanotubes encapsulating binary alloy nanoparticles (MxNi-NCNT, M= Fe, Co) were successfully fabricated through the co-pyrolysis of melamine and metal precursors. The MxNi-NCNT samples exhibited bamboo-like nanotubular structures with a large specific surface area and high degree of graphitization. Their electrocatalytic performance for syngas production can be tuned by changing the alloy compositions and modifying the electronic structure of the carbon nanotube through the encapsulated metal nanoparticles. Consequently, syngas with a wide range of CO/H2 ratios, from 0.5:1 to 3.4:1, can be produced on MxNi-NCNT. More importantly, stable CO/H2 ratios of 2:1 and 1.5:1, corresponding to the ratio to produce biofuels by syngas fermentation, could be realized on Co1Ni-NCNT and Co2Ni-NCNT, respectively, over a potential window of –0.8 to –1.2 V versus the reversible hydrogen electrode. Our work provides an approach to develop low-cost and potential-independent electrocatalysts to effectively produce syngas with an adjustable CO/H2 ratio from electrochemical CO2 reduction.

关键词： electrochemical reduction of CO2     syngas     N-doped carbon nanotubes     encapsulated alloy nanoparticles     CO/H2 ratio    

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High specificity detection of Pb

Ruozhen YU,Zheng FANG,Wei MENG,Zhenguang YAN,Lina DU,Hong WANG,Zhengtao LIU

《环境科学与工程前沿（英文）》 2014年 第8卷 第5期   页码 729-736 doi: 10.1007/s11783-013-0611-3

摘要： Only one bifunctional metal-chelator was used to prepare immunogen and coating antigen in all of the previous researches. However, the antibody-specific recognition to the spacer arm of the bifunctional metal-chelator might lower the specificity of heavy metal ions immunoassay. Two different bifunctional metal-chelators were adopted to prepare the immunogen and coating antigen respectively in our study to avoid this problem. The conjugates of keyhole limpet hemocyanin (KLH) and -SCN-Bz-DTPA-Pb were used as immunogen, whereas the conjugates of bovine serum albumin (BSA) and -NH -Bn-DTPA-Pb were used as coating antigen. Polyclonal antibodies specific to DTPA-Pb chelates were obtained from rabbits. Indirect competitive enzyme-linked immunosorbent assay (ELISA) was adopted to detect Pb ion solutions prepared by Pb standard solution and ultrapure water. In the mixing microplate, DTPA and Pb ions formed chelates and combined with specific antibodies. After incubation, the DTPA-Pb and the antibodies complex were added into the wells of the reaction microplate. The reaction microplate was coated by the conjugates of BSA and -NH -DTPA-Pb, which competed for the specific antibodies. The result signals presented a good sigmoid curve when the Pb concentration ranges from 0.01 to 100 mg·L . The IC50 of the indirect competitive ELISA is 0.23±0.04 mg·L Pb ion. The cross-reaction with Cd , Cu , Fe , Mn , Zn , and other divalent ions were less than 5%.

关键词： p-SCN-Bz-DTPA     p-NH2-Bn-DTPA     lead ion     polyclonal antibody    

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Development of an H reduction and moderate oxidation method for 3,5-dimethylpyridine hydrogenation in

《化学科学与工程前沿（英文）》 2022年 第16卷 第12期   页码 1807-1817 doi: 10.1007/s11705-022-2243-2

摘要： The Ru/C catalyst prepared by impregnation method was used for hydrogenation of 3,5-dimethylpyridine in a trickle bed reactor. Under the same reduction conditions (300 °C in H2), the catalytic activity of the non-in-situ reduced Ru/C-n catalyst was higher than that of the in-situ reduced Ru/C-y catalyst. Therefore, an in-situ H2 reduction and moderate oxidation method was developed to increase the catalyst activity. Moreover, the influence of oxidation temperature on the developed method was investigated. The catalysts were characterized by Brunauer–Emmett–Teller method, hydrogen temperature programmed reduction H2-TPR, hydrogen temperature-programmed dispersion (H2-TPD), X-ray diffraction, energy dispersive spectroscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, O2 chemisorption and oxygen temperature-programmed dispersion (O2-TPD) analyses. The results showed that there existed an optimal Ru/RuOx ratio for the catalyst, and the highest 3,5-dimethylpyridine conversion was obtained for the Ru/C-i1 catalyst prepared by in-situ H2 reduction and moderate oxidation (oxidized at 100 °C). Excessive oxidation (200 °C) resulted in a significant decrease in the Ru/RuOx ratio of the in-situ H2 reduction and moderate oxidized Ru/C-i2 catalyst, the interaction between RuOx species and the support changed, and the hard-to-reduce RuOx species was formed, leading to a significant decrease in catalyst activity. The developed in-situ H2 reduction and moderate oxidation method eliminated the step of the non-in-situ reduction of catalyst outside the trickle bed reactor.

关键词： Ru/C catalyst     in-situ H2 reduction and moderate oxidation     in-situ reduction     non-in-situ reduction     hydrogenation of 3     5-dimethylpyridine    

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<i>Ni>-Positive ion activated rapid addition and mitochondrial targeting ratiometric fluorescent probesfor <i>in vivoi> cell H2S imaging

Yan Shi, Fangjun Huo, Yongkang Yue, Caixia Yin

《化学科学与工程前沿（英文）》 2022年 第16卷 第1期   页码 64-71 doi: 10.1007/s11705-021-2048-8

摘要： Heterocyclic compound quinoline and its derivatives exist in natural compounds and have a broad spectrum of biological activity. They play an important role in the design of new structural entities for medical applications. Similarly, indoles and their derivatives are found widely in nature. Amino acids, alkaloids and auxin are all derivatives of indoles, as are dyes, and their condensation with aldehydes makes it easy to construct reaction sites for nucleophilic addition agents. In this work, we combine these two groups organically to construct a rapid response site (within 30 s) for H S, and at the same time, a ratiometric fluorescence response is presented throughout the process of H S detection. As such, the lower detection limit can reach 55.7 nmol/L for H S. In addition, cell imaging shows that this probe can be used for the mitochondrial targeted detection of endogenous and exogenous H S. Finally, this probe application was verified by imaging H S in nude mice.

关键词： heterocyclic compound     hydrogen sulfide     ratiometric     mitochondrial targeted    

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NO<i>xi> and H2S formation in the reductive zone of air-staged combustion of

Jinzhi CAI, Dan LI, Denggao CHEN, Zhenshan LI

《能源前沿（英文）》 2021年 第15卷 第1期   页码 4-13 doi: 10.1007/s11708-020-0804-y

摘要： Low NO combustion of blended coals is widely used in coal-fired boilers in China to control NO emission; thus, it is necessary to understand the formation mechanism of NO and H S during the combustion of blended coals. This paper focused on the investigation of reductive gases in the formation of NO and H S in the reductive zone of blended coals during combustion. Experiments with Zhundong (ZD) and Commercial (GE) coal and their blends with different mixing ratios were conducted in a drop tube furnace at 1200°C–1400°C with an excessive air ratio of 0.6–1.2. The coal conversion and formation characteristics of CO, H S, and NO in the fuel-rich zone were carefully studied under different experimental conditions for different blend ratios. Blending ZD into GE was found to increase not only the coal conversion but also the concentrations of CO and H S as NO reduction accelerated. Both the CO and H S concentrations inblended coal combustion increase with an increase in the combustion temperature and a decrease in the excessive air ratio. Based on accumulated experimental data, one interesting finding was that NO and H S from blended coal combustion were almost directly dependent on the CO concentration, and the CO concentration of the blended coal combustion depended on the single char gasification conversion.Thus, CO, NO , and H S formation characteristics from blended coal combustion can be well predicted by single char gasification kinetics.

关键词： blended coal combustion     NOx formation     H2S formation     air staged combustion    

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<i>H. sinensisi> mycelium inhibits epithelial-mesenchymal transition by inactivating

Li Lu, Haiyan Zhu, Hailin Wang, Huaping Liang, Yayi Hou, Huan Dou

《医学前沿（英文）》 2021年 第15卷 第2期   页码 313-329 doi: 10.1007/s11684-020-0737-1

摘要： The medical fungus has been used as a Chinese folk health supplement because of its immunomodulatory properties. Our previous studies established the antifibrotic action of mycelium (HSM) in the lung. The epithelial–mesenchymal transition (EMT) is involved in the pathogenesis of idiopathic pulmonary fibrosis. The present study investigates the role of HSM in mediating EMT during the development of pulmonary fibrosis. HSM significantly inhibits bleomycin (BLM)-induced pulmonary fibrosis by blocking the EMT. In addition, the expression levels of midkine are increased in the lungs of the BLM-induced group. Further analysis of the results indicates that the mRNA level of midkine correlated positively with EMT. HSM markedly abrogates the transforming growth factor β-induced EMT-like phenotype and behavior . The activation of midkine related signaling pathway is ameliorated following HSM treatment, whereas this extract also caused an effective attenuation of the induction of EMT (caused by midkine overexpression) . Results further confirm that oral medication of HSM disrupted the midkine pathway . Overall, findings suggest that the midkine pathway and the regulation of the EMT may be considered novel candidate therapeutic targets for the antifibrotic effects caused by HSM.

关键词： epithelial−mesenchymal transition     H. sinensis mycelium     midkine     pulmonary fibrosis    

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H2 对Pt-Ba-Ce /γ-Al2O3 催化剂NO<i>xi> 存储和还原机理的影响研究 Article

王攀, 裔静, 孙川, 罗鹏, 雷利利

《工程（英文）》 2019年 第5卷 第3期   页码 568-575 doi: 10.1016/j.eng.2019.02.005

摘要：

本研究采用浸渍法制备了Pt-Ba-Ce/γ-Al2O3催化剂，利用实验评价了H2 对NSR（NOx<在NOx 吸附和脱附循环实验中，随着H2暴露时间（30 s、45 s 和60 s）延长，NOx 的存储效率和转化率增加适当增加H2量加速了硝酸盐或亚硝酸盐的分解，有利于NOx 存储-还原，并促进了下一循环NSR吸附位点的再生。

关键词： Pt–Ba–Ce/γ-Al2O3 催化剂，物理化学性质，NO<i>xi>存储和还原，NO<i>xi> 排放，H2 还原剂    

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Hormesis-like growth and photosynthetic physiology of marine diatom Bohlin exposed to polystyrene microplastics

《环境科学与工程前沿（英文）》 2022年 第16卷 第1期   页码 2-2 doi: 10.1007/s11783-021-1436-0

摘要：

• Polystyrene microplastic caused hormesis-like effects in Phaeodactylum tricornutum.

关键词： Microplastics     Marine microalgae     Phaeodactylum tricornutum Bohlin     Growth     Photosynthetic pigments     Chlorophyll fluorescence parameters    

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Recent advances in special morphologic photocatalysts for NO removal

《环境科学与工程前沿（英文）》 2022年 第16卷 第11期 doi: 10.1007/s11783-022-1573-0

摘要：

● Systematic information of recent progress in photocatalytic NO x removal is provided.

关键词： NOx removal     Photocatalyst     Graphene     C3N4     Bi-based compounds.    

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Floret-like Fe–N nanoparticle-embedded porous carbon superstructures from a Fe-covalent triazine polymer

《化学科学与工程前沿（英文）》 2023年 第17卷 第5期   页码 525-535 doi: 10.1007/s11705-022-2232-5

摘要： Fe–Nx nanoparticles-embedded porous carbons with a desirable superstructure have attracted immense attention as promising catalysts for electrochemical oxygen reduction reaction. Herein, we employed Fe-coordinated covalent triazine polymer for the fabrication of Fe–Nx nanoparticle-embedded porous carbon nanoflorets (Fe/N@CNFs) employing a hypersaline-confinement-conversion strategy. Presence of tailored N types within the covalent triazine polymer interwork in high proportions contributes to the generation of Fe/N coordination and subsequent Fe–Nx nanoparticles. Owing to the utilization of NaCl crystals, the resultant Fe/N@CNF-800 which was generated by pyrolysis at 800 °C showed nanoflower structure and large specific surface area, which remarkably suppressed the agglomeration of high catalytic active sites. As expect, the Fe/N@CNF-800 exhibited unexpected oxygen reduction reaction catalytic performance with an ultrahigh half-wave potential (0.89 V vs. reversible hydrogen electrode), a dominant 4e– transfer approach and great cycle stability (> 92% after 100000 s). As a demonstration, the Fe/N-PCNF-800-assembled zinc–air battery delivered a high open circuit voltage of 1.51 V, a maximum peak power density of 164 mW·cm–2, as well as eminent rate performance, surpassing those of commercial Pt/C. This contribution offers a valuable avenue to exploit efficient metal nanoparticles-based carbon catalysts towards energy-related electrocatalytic reactions and beyond.

关键词： Fe–Nx nanoparticles     hypersaline-confinement conversion     floret-like carbon     covalent triazine polymers     oxygen reduction reaction    

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grown TiN/N-TiO composite for enhanced photocatalytic H evolution activity

《能源前沿（英文）》 2021年 第15卷 第3期   页码 721-731 doi: 10.1007/s11708-021-0766-8

摘要： Titanium nitride (TiN) decorated N-doped titania (N-TiO2) composite (TiN/N-TiO2) is fabricated via an in situ nitridation using a hydrothermally synthesized TiO2 and melamine (MA) as raw materials. After the optimization of the reaction condition, the resultant TiN/N-TiO2 composite delivers a hydrogen evolution activity of up to 703 μmol/h under the full spectrum irradiation of Xe-lamp, which is approximately 2.6 and 32.0 times more than that of TiO2 and TiN alone, respectively. To explore the underlying photocatalytic mechanism, the crystal phase, morphology, light absorption, energy band structure, element composition, and electrochemical behavior of the composite material are characterized and analyzed. The results indicate that the superior activity is mainly caused by the in situ formation of plasmonic TiN and N-TiO2 with intimate interface contact, which not only extends the spectral response range, but also accelerates the transfer and separation of the photoexcited hot charge carrier of TiN. The present study provides a fascinating approach to in situ forming nonmetallic plasmonic material/N-doped TiO2 composite photocatalysts for high-efficiency water splitting.

关键词： photocatalytic H2 evolution     TiN/N-TiO2 composite     plasmonic effect     in-situ nitridation    

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星突江鲽胰岛素样生长因子I的体外重组表达及生物活性分析

徐永江,臧 坤,柳学周,史 宝,陈圣毅

《中国工程科学》 2015年 第17卷 第1期   页码 67-73

摘要：

为了在蛋白水平认识星突江鲽（Platichthys stellatus）胰岛素样生长因子I（IGF-I）的生长调控作用及机制，采用RT-PCR方法扩增了其成熟肽片段，利用原核表达载体pET-28a成功构建了重组星突江鲽IGF-I/pET-28a质粒，转化至大肠杆菌BL21（DE3）后经IPTG诱导获得了N端含6个组氨酸的重组星突江鲽IGF-I蛋白。获得的重组IGF-I蛋白大小为12.1 kD，37 ℃下用0.5 mmol/L的异丙基-β-D-硫代半乳糖苷(IPTG)诱导3 h时目的蛋白表达量最高，占菌体总蛋白的39.8 %，主要以包涵体形式存在包涵体经6 mol/L盐酸胍变性、Ni2+离子亲和柱纯化和尿素梯度复性后，可获得高纯度的IGF-I重组蛋白。本研究成功构建了星突江鲽IGF-I体外高效表达系统，并获得具有细胞水平生物活性的星突江鲽IGF-I重组蛋白，结果可为深入探究IGF-I在星突江鲽生长发育中的作用机制及研制高效绿色的促生长制剂提供基础资料

关键词： 星突江鲽；胰岛素样生长因子I；原核表达；生物活性    

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Efficient hydrothermal deoxygenation of methyl palmitate to diesel-like hydrocarbons on carbon encapsulated

《化学科学与工程前沿（英文）》 2023年 第17卷 第2期   页码 139-155 doi: 10.1007/s11705-022-2217-4

摘要： Porous carbon-encapsulated Ni and Ni–Sn intermetallic compound catalysts were prepared by the one-pot extended Stöber method followed by carbonization and tested for in-situ hydrothermal deoxygenation of methyl palmitate with methanol as the hydrogen donor. During the catalyst preparation, Sn doping reduces the size of carbon spheres, and the formation of Ni–Sn intermetallic compounds restrain the graphitization, contributing to larger pore volume and pore diameter. Consequently, a more facile mass transfer occurs in carbon-encapsulated Ni–Sn intermetallic compound catalysts than in carbon-encapsulated Ni catalysts. During the in-situ hydrothermal deoxygenation, the synergism between Ni and Sn favors palmitic acid hydrogenation to a highly reactive hexadecanal that easily either decarbonylate to n-pentadecane or is hydrogenated to hexadecanol. At high reaction temperature, hexadecanol undergoes dehydrogenation–decarbonylation, generating n-pentadecane. Also, the C–C bond hydrolysis and methanation are suppressed on Ni–Sn intermetallic compounds, favorable for increasing the carbon yield and reducing the H2 consumption. The n-pentadecane and n-hexadecane yields reached 88.1% and 92.8% on carbon-encapsulated Ni3Sn2 intermetallic compound at 330 °C. After washing and H2 reduction, the carbon-encapsulated Ni3Sn2 intermetallic compound remains stable during three recycling cycles. This is ascribed to the carbon confinement that effectively suppresses the sintering and loss of metal particles under harsh hydrothermal conditions.

关键词： extended Stöber method     carbon encapsulated Ni–Sn intermetallic compounds     confinement     in-situ hydrothermal deoxygenation     hydrogenation     decarbonylation    

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标题 作者 时间 类型 操作

Graphene-like -BN supported polyhedral NiS/NiS nanocrystals with excellent photocatalytic performance

期刊论文

Photocatalytic water splitting of ternary graphene-like photocatalyst for the photocatalytic hydrogen

Yan Zhang, Yuyan Zhang, Xue Li, Xiaohan Zhao, Cosmos Anning, John Crittenden, Xianjun Lyu

期刊论文

Bamboo-like -doped carbon nanotubes encapsulating M(Co, Fe)-Ni alloy for electrochemical production ofsyngas with potential-independent CO/H ratios

期刊论文

High specificity detection of Pb

Ruozhen YU,Zheng FANG,Wei MENG,Zhenguang YAN,Lina DU,Hong WANG,Zhengtao LIU

期刊论文

Development of an H reduction and moderate oxidation method for 3,5-dimethylpyridine hydrogenation in

期刊论文

<i>Ni>-Positive ion activated rapid addition and mitochondrial targeting ratiometric fluorescent probesfor <i>in vivoi> cell H2S imaging

Yan Shi, Fangjun Huo, Yongkang Yue, Caixia Yin

期刊论文

NO<i>xi> and H2S formation in the reductive zone of air-staged combustion of

Jinzhi CAI, Dan LI, Denggao CHEN, Zhenshan LI

期刊论文

<i>H. sinensisi> mycelium inhibits epithelial-mesenchymal transition by inactivating

Li Lu, Haiyan Zhu, Hailin Wang, Huaping Liang, Yayi Hou, Huan Dou

期刊论文

H2 对Pt-Ba-Ce /γ-Al2O3 催化剂NO<i>xi> 存储和还原机理的影响研究

王攀, 裔静, 孙川, 罗鹏, 雷利利

期刊论文

Hormesis-like growth and photosynthetic physiology of marine diatom Bohlin exposed to polystyrene microplastics

期刊论文

Recent advances in special morphologic photocatalysts for NO removal

期刊论文

Floret-like Fe–N nanoparticle-embedded porous carbon superstructures from a Fe-covalent triazine polymer

期刊论文

grown TiN/N-TiO composite for enhanced photocatalytic H evolution activity

期刊论文

星突江鲽胰岛素样生长因子I的体外重组表达及生物活性分析

徐永江,臧 坤,柳学周,史 宝,陈圣毅

期刊论文

Efficient hydrothermal deoxygenation of methyl palmitate to diesel-like hydrocarbons on carbon encapsulated

期刊论文