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Comparison study on strategies to prepare nanocrystalline Li

Qiang XIAO, Xiaodan TANG, Yefeng LIU, Yijun ZHONG, Weidong ZHU

《化学科学与工程前沿（英文）》 2013年第7卷第3期页码 297-302 doi: 10.1007/s11705-013-1346-1

摘要： A comparison study has been conducted on the strategies for synthesizing nanocrystalline Li ZrO and K-doped Li ZrO absorbents for CO capture at high temperatures, including solid-state and liquid-phase methods, citrate route, and starch-assisted sol-gel method combined with freeze-drying technique. The absorption properties, including uptake rate and absorption capacity, of synthesized absorbents were investigated by thermogravimetric analysis (TGA) at different CO partial pressures. The nanosized Li ZrO crystals synthesized by the citrate route exhibit a faster uptake and a higher, nearly stoichiometric absorption capacity than those synthesized by the solid-state and liquid-phase methods. The doping of K into Li ZrO can significantly improve the uptake rate of CO , especially at low CO partial pressures. For the synthesis of K-doped Li ZrO , the citrate route has poor reproducibility and scalability, whereas the starch-assisted sol-gel method combined with freeze-drying technique is reproducible and easily scaled up, and the thus synthesized absorbents possess excellent CO capture properties.

关键词： CO₂ capture Li₂ZrO₃ K-doped Li₂ZrO₃ citrate starch freeze-drying technique

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Visbreaking of heavy petroleum oil catalyzed by SO/ZrO solid super-acid doped with Ni or Sn

JING Ping, LI Qingbiao, HAN Mei, SUN Daohua, JIA Lishan, FANG Weiping

《化学科学与工程前沿（英文）》 2008年第2卷第2期页码 186-190 doi: 10.1007/s11705-008-0035-y

摘要： SO/ZrO solid super-acid catalysts (SZ) doped with Ni or Sn (Ni/SZ, Sn/SZ) were prepared for catalytic visbreaking of heavy petroleum oil from Shengli oil field. The visbreaking reactions were carried out at 240°C and 3–4 MPa for 24 h using a heavy petroleum oil to catalyst mass ratio of 100 : 0.05. The effect of water content on viscosity of heavy petroleum oil was also investigated. Both catalysts can promote thermolysis of heavy petroleum oil and the viscosity was reduced from 0.319 Pa·s to 0.135 Pa·s for Ni/SZ and 0.163 Pa·s for (Sn/SZ) with visbreaking rates of 57.7% and 48.9%, respectively. After visbreaking, the saturated hydrocarbon content increased while aromatics, resin, asphaltene, sulfur and nitrogen content decreased. The presence of water was disadvantageous to visbreaking of heavy petroleum oil.

关键词： thermolysis Shengli asphaltene SO/ZrO presence

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Preparation and characterization of nanocrystalline ZrO2-7%Y2O3 powders for thermal barrier coatings

Kirsten BOBZIN, Lidong ZHAO, Thomas SCHLAEFER, Thomas WARDA

《机械工程前沿（英文）》 2011年第6卷第2期页码 176-181 doi: 10.1007/s11465-011-0220-4

摘要：

High-energy ball milling is an effective method to produce nanocrystalline oxides. In this study, a conventional ZrO₂-7%Y₂O₃spray powder was ball-milled to produce nanocrystalline powders with high levels of crystalline disorders for deposition of thermal barrier coatings. The powder was milled both with 100Cr6 steel balls and with ZrO₂-3%Y₂O₃ ceramic balls as grinding media. The milling time was varied in order to investigate the effect of the milling time on the crystallite size. The powders were investigated in terms of their crystallite sizes and morphologies by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that under given milling conditions the powder was already nanostructured after 40 min milling. The crystallite size decreased significantly with increasing milling time within first 120 min. After that, a further increase of milling time did not lead to a significant reduction of the crystallite size. Ball-milling led to lattice microstrains. Milling with the steel balls resulted in finer nano-sized crystal grains, but caused the contamination of the powder. The nano-sized crystal grains coarsened during the heat-treatment at 1250°C.

关键词： nanostrucured powders yttria stabilized zirconia (YSZ) high-energy ball milling thermal barrier coatings

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A simple and cheap method for preparation of coupled ZrO2/ZnO with high photocatalytic activities

WANG Zheng, ZHANG Bingru, LI Fengting

《环境科学与工程前沿（英文）》 2007年第1卷第4期页码 454-458 doi: 10.1007/s11783-007-0072-7

摘要： The objective of this study was to prepare a new photocatalyst with high activities for degradation of organic pollutants. Coupled ZrO/ZnO photocatalyst was prepared with a simple precipitation method with cheap raw

关键词： objective ZrO/ZnO photocatalyst photocatalyst precipitation degradation

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Xiao Ke Qing improves glycometabolism and ameliorates insulin resistance by regulating the PI3K/Akt pathway

Xiaoqing Li, Xinxin Li, Genbei Wang, Yan Xu, Yuanyuan Wang, Ruijia Hao, Xiaohui Ma

《医学前沿（英文）》 2018年第12卷第6期页码 688-696 doi: 10.1007/s11684-018-0662-8

摘要：

Xiao Ke Qing (XKQ) granule has been clinically used to treat type 2 diabetes mellitus (T2DM) for 10 years in Chinese traditional medication. However, its mechanisms against hyperglycemia remain poorly understood. This study aims to investigate XKQ mechanisms on diabetes and diabetic liver disease by using the KKAy mice model. Our results indicate that XKQ can significantly reduce food and water intake. XKQ treatment also remarkably decreases both the fasting blood glucose and blood glucose in the oral glucose tolerance test. Additionally, XKQ can significantly decrease the serum alanine aminotransferase level and liver index and can alleviate the fat degeneration in liver tissues. Moreover, XKQ can ameliorate insulin resistance and upregulate the expression of IRS-1, PI3K (p85), p-Akt, and GLUT4 in the skeletal muscle of KKAy mice. XKQ is an effective drug for T2DM by ameliorating insulin resistance and regulating the PI3K/Akt signaling pathway in the skeletal muscle.

关键词： XKQ type 2 diabetes mellitus KKAy mice PI3K/Akt pathway diabetic liver disease

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Enhanced performance of oxygen vacancies on CO adsorption and activation over different phases of ZrO

《能源前沿（英文）》 2023年第17卷第4期页码 545-554 doi: 10.1007/s11708-023-0867-7

摘要： The effect of oxygen vacancies on the adsorption and activation of CO₂ on the surface of different phases of ZrO₂ is investigated by density functional theory (DFT) calculations. The calculations show that the oxygen vacancies contribute greatly to both the adsorption and activation of CO₂. The adsorption energy of CO₂ on the c-ZrO₂, t-ZrO₂ and, m-ZrO₂ surfaces is enhanced to 5, 4, and 3 folds with the help of oxygen vacancies, respectively. Moreover, the energy barrier of CO₂ dissociation on the defective surfaces of c-ZrO₂, t-ZrO₂, and m-ZrO₂ is reduced to 1/2, 1/4, and 1/5 of the perfect surface with the assistance of oxygen vacancies. Furthermore, the activation of CO₂ on the ZrO₂ surface where oxygen vacancies are present, and changes from an endothermic reaction to an exothermic reaction. This finding demonstrates that the presence of oxygen vacancies promotes the activation of CO₂ both kinetically and thermodynamically. These results could provide guidance for the high-efficient utilization of CO₂ at an atomic scale.

关键词： CO₂ activation oxygen vacancies ZrO₂ different phases

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Magnetic Co-doped 1D/2D structured -FeO/MoS effectively activated peroxymonosulfate for efficient abatement

《环境科学与工程前沿（英文）》 2023年第18卷第3期 doi: 10.1007/s11783-024-1797-2

摘要：

● Magnetic Co- γ -Fe₂O₃/MoS₂ were prepared via facile hydrothermal methods.

关键词： Magnetic Co-γ-Fe₂O₃/MoS₂ Hydrothermal method Bisphenol A Degradation pathways Toxicity analysis

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Preparation and investigation of Pd doped Cu catalysts for selective hydrogenation of acetylene

Jang, Jong K. Keum, Karren More, Changjun Liu, Xiaoliang Yan

《化学科学与工程前沿（英文）》 2020年第14卷第4期页码 522-533 doi: 10.1007/s11705-019-1822-3

摘要： A series of PdCu bimetallic catalysts with low Cu and Pd loadings and different Cu: Pd atomic ratios were prepared by conventionally sequential impregnation (CSI) and modified sequential impregnation (MSI) of Cu and Pd for selective hydrogenation of acetylene. Characterization indicates that the supported copper (II) nitrate in the PdCu bimetallic catalysts prepared by MSI can be directly reduced to Cu metal particles due to the hydrogen spillover from Pd to Cu(NO ) crystals. In addition, for the catalysts prepared by MSI, Pd atoms can form PdCu alloy on the surface of metal particles, however, for the catalysts prepared by CSI, Pd tends to migrate and exist below the surface layer of Cu. Reaction results indicate that compared with CSI, the MSI method enables samples to possess preferable stability as well as comparable reaction activity. This should be due to the MSI method in favor of the formation of PdCu alloy on the surface of metal particles. Moreover, even Pd loading is super low,<0.045 wt-% in this study, by through adjusting Cu loading to an appropriate value, attractive reactivity and selectivity still can be achieved.

关键词： copper palladium catalysts acetylene selective hydrogenation

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Multi-functional 3D N-doped TiO

Zijian Cui, Kaiyue Zhang, Guangyu Xing, Yaqing Feng, Shuxian Meng

《化学科学与工程前沿（英文）》 2017年第11卷第3期页码 395-404 doi: 10.1007/s11705-017-1643-1

摘要： Three-dimensional TiO microspheres doped with N were synthesized by a simple single-step solvothermal method and the sample treated for 15 h (hereafter called TMF) was then used as scattering layers in the photoanodes of dye-sensitized solar cells (DSSCs). The TMF was characterized using scanning electron microscopy, high resolution transmission electron microscopy, Brunauer-Emmett-Teller measurements, X-ray diffraction, and X-ray photoelectron spectroscopy. The TMF had a high surface area of 93.2 m ·g which was beneficial for more dye-loading. Five photoanode films with different internal structures were fabricated by printing different numbers of TMF scattering layers on fluorine-doped tin oxide glass. UV-vis diffuse reflection spectra, incident photon-to-current efficiencies, photocurrent-voltage curves and electrochemical impedance spectroscopy were used to investigate the optical and electrochemical properties of these photoanodes in DSSCs. The presence of nitrogen in the TMF changed the TMF microstructure, which led to a higher open circuit voltage and a longer electron lifetime. In addition, the presence of the nitrogen significantly improved the light utilization and photocurrent. The highest photoelectric conversion efficiency achieved was 8.08%, which is much higher than that derived from typical P25 nanoparticles (6.52%).

关键词： DSSCs N doping scattering layer electron lifetime

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visible-photocatalytic hydrogen evolution and simultaneous organic pollutant degradation over an urchin-like oxygen-doped

《环境科学与工程前沿（英文）》 2022年第16卷第10期 doi: 10.1007/s11783-022-1566-z

摘要：

● An urchin-like OMS/ZIS composite was fabricated by a facile solvothermal method.

关键词： Dual-functional photocatalysts Oxygen-doped MoS₂/ZnIn₂S₄ H₂ evolution Organic pollutant

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Effect of TiO 2 loading on the activity of V/TiO 2 -Al 2 O 3 in the catalytic oxidehydrogenation of ethylbenzene

Xiaohong LI, Wenying LI,

《化学科学与工程前沿（英文）》 2010年第4卷第2期页码 142-146 doi: 10.1007/s11705-009-0233-2

摘要： TiO-AlOmixed oxides with different compositions ranging from 40wt-% to 95wt-% of TiO were prepared by sol-gel method and impregnated with different amounts of VO. Supports and catalysts were characterized by X-ray diffraction (XRD), physisorption, temperature preprogrammed reduction (H-TPR), and ammonia temperature programmed desorption (NH-TPD). TiO content in the support had obvious effect on the crystal structure, texture characteristic, acid property, and catalytic activity in dehydrogenation of ethylbenzene (EB) with carbon dioxide. The highest catalytic activity was acquired when the TiO content was 50 wt-%.

关键词： desorption different TiO-AlOmixed physisorption ethylbenzene

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基于二硫化钛可饱和吸收体的被动锁模掺铒光纤激光器 Research Articles

尚新新1,3,4,郭林广1,3,4,张华年2,李登旺1,3,4,岳庆炀1,3,4

《信息与电子工程前沿（英文）》 2021年第22卷第5期页码 615-766 doi: 10.1631/FITEE.2000341

摘要：本文采用液相剥离法和旋涂法合成调制深度为5.08%、饱和强度为10.62 MW/cm2的二硫化钛聚乙烯醇薄膜型可饱和吸收体。

关键词：光纤激光器；被动锁模；可饱和吸收体；二硫化钛

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Fabrication of three-dimensional porous La-doped SrTiO3 microspheres with enhanced visible light catalytic

Dong Yang, Xiaoyan Zou, Yuanyuan Sun, Zhenwei Tong, Zhongyi Jiang

《化学科学与工程前沿（英文）》 2018年第12卷第3期页码 440-449 doi: 10.1007/s11705-018-1700-4

摘要：

In recent years, much effort has been focused on the development of the photocatalysts with high performance under visible light irradiation. In this paper, three-dimensional porous La-doped SrTiO₃ (LST) microspheres were prepared by a modified sol–gel method, in which the agarose gel/SrCO₃ microsphere and La₂O₃ were employed as the template and the La resource, respectively. The as-prepared LST microspheres exhibit a porous structure with a diameter of about 10 µm and a surface pore size of about 100 nm. The La element was doped into the crystal lattice of SrTiO₃ by the substitution of La³⁺ for Sr²⁺. Therefore, the absorption edge of LST samples shifts toward the visible light region, and their photocatalytic activity for the Cr(VI) reduction is enhanced under visible light. Among all LST samples, LST-0.5 (the La³⁺ doping content is 0.5 wt-%) exhibited the highest visible-light photocatalytic activity, which can reduce 84% Cr(VI) within 100 min. This LST materials may become a promising photocatalyst for the facile treatment of wastewater containing poisonous heavy metal ions.

关键词： SrTiO₃ La³⁺ doping porous microsphere visible-light photocatalysis Cr(VI) reduction

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基于拓扑绝缘体Sb2Te3的52 nm宽谱可调谐被动调Q掺镱光纤激光器 Research

王涛1,俞强1,2,郭琨1,史鑫尧2,阚雪芬3,徐轶君4,5,吴坚1,4,张凯2,周朴1

《信息与电子工程前沿（英文）》 2021年第22卷第3期页码 287-436 doi: 10.1631/FITEE.2000577

摘要：拓扑绝缘体Sb2Te3具有从可见光到红外波段的宽谱可饱和吸收的优点。在本研究中，首先将拓扑绝缘体家族中的二维材料Sb2Te3可饱和吸收体应用在宽谱可调谐被动调Q掺镱光纤激光器中。高质量的Sb2Te3晶体通过选区熔炼法合成，进一步通过改进的机械剥离方法制备少层Sb2Te3可饱和吸收体。实验结果表明，Sb2Te3具有宽谱可饱和吸收特性，这个波长可调谐脉冲激光可以为实际应用提供一个方便简单的光源。

关键词：拓扑绝缘体；Sb2Te3；光纤激光；被动调Q激光；波长可调谐激光

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钾/锰助剂对氮掺杂碳纳米管负载铁基催化剂在CO₂加氢过程中的影响研究 Article

Praewpilin Kangvansura, Ly May Chew, Chanapa Kongmark, Phatchada Santawaja, Holger Ruland, Wei Xia, Hans Schulz, Attera Worayingyong, Martin Muhler

《工程（英文）》 2017年第3卷第3期页码 385-392 doi: 10.1016/J.ENG.2017.03.013

摘要：

氮掺杂碳纳米管(NCNTs) 作为载体负载铁(Fe) 纳米颗粒，可应用于CO₂多相催化加氢反应(633 K和25 bar)。当将钾(K) 和锰(Mn) 作为助催化剂时，Fe/NCNT 展现出优异的CO₂ 加氢性能，在体积空速(GHSV) 为3.1 L·(g·h)^{&ndash当使用K 作为助催化剂时，反应对烯烃和短链烷烃具有高的选择性。当K 和Mn 同时作为助催化剂时，其催化活性能够稳定地维持60 h。通过探针反应NH₃ 的催化分解来表征助催化剂效应。当K 和Mn 作为助催化剂时，Fe/NCNT 具有最好的催化活性。在还原条件下，当K 作为助催化剂时，Fe/NCNT 具有最优异的热稳定性。}

关键词： CO₂ 加氢铁基催化剂 n 型碳纳米管 Mn 助剂 K 助剂

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标题作者时间类型操作

Comparison study on strategies to prepare nanocrystalline Li

Qiang XIAO, Xiaodan TANG, Yefeng LIU, Yijun ZHONG, Weidong ZHU

期刊论文

Visbreaking of heavy petroleum oil catalyzed by SO/ZrO solid super-acid doped with Ni or Sn

JING Ping, LI Qingbiao, HAN Mei, SUN Daohua, JIA Lishan, FANG Weiping

期刊论文

Preparation and characterization of nanocrystalline ZrO2-7%Y2O3 powders for thermal barrier coatings

Kirsten BOBZIN, Lidong ZHAO, Thomas SCHLAEFER, Thomas WARDA

期刊论文

A simple and cheap method for preparation of coupled ZrO2/ZnO with high photocatalytic activities

WANG Zheng, ZHANG Bingru, LI Fengting

期刊论文

Xiao Ke Qing improves glycometabolism and ameliorates insulin resistance by regulating the PI3K/Akt pathway

Xiaoqing Li, Xinxin Li, Genbei Wang, Yan Xu, Yuanyuan Wang, Ruijia Hao, Xiaohui Ma

期刊论文

Enhanced performance of oxygen vacancies on CO adsorption and activation over different phases of ZrO

期刊论文

Magnetic Co-doped 1D/2D structured -FeO/MoS effectively activated peroxymonosulfate for efficient abatement

期刊论文

Preparation and investigation of Pd doped Cu catalysts for selective hydrogenation of acetylene

Jang, Jong K. Keum, Karren More, Changjun Liu, Xiaoliang Yan

期刊论文

Multi-functional 3D N-doped TiO

Zijian Cui, Kaiyue Zhang, Guangyu Xing, Yaqing Feng, Shuxian Meng

期刊论文

visible-photocatalytic hydrogen evolution and simultaneous organic pollutant degradation over an urchin-like oxygen-doped

期刊论文

Effect of TiO 2 loading on the activity of V/TiO 2 -Al 2 O 3 in the catalytic oxidehydrogenation of ethylbenzene

Xiaohong LI, Wenying LI,

期刊论文

基于二硫化钛可饱和吸收体的被动锁模掺铒光纤激光器

尚新新1,3,4,郭林广1,3,4,张华年2,李登旺1,3,4,岳庆炀1,3,4

期刊论文

Fabrication of three-dimensional porous La-doped SrTiO3 microspheres with enhanced visible light catalytic

Dong Yang, Xiaoyan Zou, Yuanyuan Sun, Zhenwei Tong, Zhongyi Jiang

期刊论文

基于拓扑绝缘体Sb2Te3的52 nm宽谱可调谐被动调Q掺镱光纤激光器

王涛1,俞强1,2,郭琨1,史鑫尧2,阚雪芬3,徐轶君4,5,吴坚1,4,张凯2,周朴1

期刊论文

钾/锰助剂对氮掺杂碳纳米管负载铁基催化剂在CO₂加氢过程中的影响研究

Praewpilin Kangvansura, Ly May Chew, Chanapa Kongmark, Phatchada Santawaja, Holger Ruland, Wei Xia, Hans Schulz, Attera Worayingyong, Martin Muhler

期刊论文

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