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Enhancement of the electrocatalytic oxidation of antibiotic wastewater over the conductive black carbon-PbO

Xiangyu Wang, Yu Xie, Guizhen Yang, Jiming Hao, Jun Ma, Ping Ning

《环境科学与工程前沿（英文）》 2020年 第14卷 第2期 doi: 10.1007/s11783-019-1201-9

摘要： • A novel conductive carbon black modified lead dioxide electrode is synthesized. • The modified PbO2 electrode exhibits enhanced electrochemical performances. • BBD method could predict optimal experiment conditions accurately and reliably. • The modified electrode possesses outstanding reusability and safety. The secondary pollution caused by modification of an electrode due to doping of harmful materials has long been a big concern. In this study, an environmentally friendly material, conductive carbon black, was adopted for modification of lead dioxide electrode (PbO2). It was observed that the as-prepared conductive carbon black modified electrode (C-PbO2) exhibited an enhanced electrocatalytical performance and more stable structure than a pristine PbO2 electrode, and the removal efficiency of metronidazole (MNZ) and COD by a 1.0% C-PbO2 electrode at optimal conditions was increased by 24.66% and 7.01%, respectively. Results revealed that the electrochemical degradation of MNZ wastewater followed pseudo-first-order kinetics. This intimates that the presence of conductive carbon black could improve the current efficiency, promote the generation of hydroxyl radicals, and accelerate the removal of MNZ through oxidation. In addition, MNZ degradation pathways through a C-PbO2 electrode were proposed based on the identified intermediates. To promote the electrode to treat antibiotic wastewater, optimal experimental conditions were predicted through the Box-Behnken design (BBD) method. The results of this study suggest that a C-PbO2 electrode may represent a promising functional material to pretreat antibiotic wastewaters.

关键词： Conductive carbon black     PbO2 electrode     Metronidazole     Electrochemical oxidation     Box-Behnken design-response surface method    

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Preparation of nZVI embedded modified mesoporous carbon for catalytic persulfate to degradation of reactiveblack 5

《环境科学与工程前沿（英文）》 2021年 第15卷 第5期 doi: 10.1007/s11783-020-1372-4

摘要：

• The MCNZVI is prepared as an interesting material for PS activation.

关键词： MCNZVI     Core-shell structure     Reactive Black 5     Persulfate     Mechanism    

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Contribution of black carbon to nonlinearity of sorption and desorption of acetochlor on sediment

Jianqiu LIU, Yaobin ZHANG, Hong CHEN, Yazhi ZHAO, Xie QUAN

《环境科学与工程前沿（英文）》 2009年 第3卷 第1期   页码 69-74 doi: 10.1007/s11783-008-0076-y

摘要： In order to investigate the contribution of various black carbon (BC) contents to nonlinearity of sorption and desorption isotherms for acetochlor on sediment, equilibrium sorption and desorption isotherms were determined to measure sorption and desorption of acetochlor in sediment amended with various amounts of BC. In this paper, two types of BC referred to as BC400 and BC500 were prepared at 400°C and 500°C, respectively. Higher preparation temperature facilitated the formation of micropores on BC to enhance its sorption capacity. Increase of the BC content obviously increased the sorption amount and reduced the desorption amount for acetochlor. When the BC500 contents in total organic carbon (TOC) increased from 0 to 60%, Freundlich sorption coefficient ( ) increased from 4.07 to 35.74, and desorption hysteresis became gradually obvious. When the content of BC in TOC was lower than 23%, the sorption isotherm had a significant linear correlation ( = 0.05). In case of desorption, a significant nonlinear change could be observed when the content of BC was up to 13%. Increase of BC content in the sediment would result in shifting the sorption-desorption isotherms from linearity to nonlinearity, which indicated that contribution of BC to nonlinear adsorption fraction became gradually remarkable.

关键词： black carbon (BC)     sorption     desorption     sediment    

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Effect of carbon black on the dynamic moduli of asphalt mixtures and its master curves

Chuangmin LI, Fanbo NING, Yuanyuan LI

《结构与土木工程前沿（英文）》 2019年 第13卷 第4期   页码 918-925 doi: 10.1007/s11709-019-0526-6

摘要： Modulus is one of the main parameters during the design of asphalt pavement structure, the newest specifications of China gives the dynamic moduli ranges of commonly used asphalt mixtures with base asphalt (BA) or styrene-butadiene-styrene modified asphalt (SBS MA), while the moduli ranges of mixtures with carbon black modified asphalt (CB MA) are not recommended. To investigate the CB effect on the dynamic moduli of CB MA mixtures, one commonly used asphalt mixture (AC-20) was designed with BA, SBS MA, and CB MA, respectively. Then, the uniaxial compression dynamic modulus tests were conducted at different temperatures and loading frequencies, the master curves of asphalt mixtures were analyzed based on the time-temperature equivalence principle. The results show that ith increasing loading frequency, the temperature dependence of dynamic moduli of all asphalt mixtures tend to be less obvious. Both SBS and CB can decrease the temperature sensitivity of asphalt mixture, the SBS MA mixture has the lowest temperature sensitivity, followed by CB MA and BA mixture. In addition, CB and SBS can obviously improve the dynamic modulus of the BA mixture, enhance the anti-deformation performance of pavement structure, and the improvement effect of CB is almost the same with SBS.

关键词： dynamic modulus     carbon black     master curve     modified asphalt     asphalt mixture    

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Observation of black carbon aerosol in Beijing, 2003

LOU Shujuan, MAO Jietai, WANG Meihua

《环境科学与工程前沿（英文）》 2007年 第1卷 第3期   页码 345-349 doi: 10.1007/s11783-007-0059-4

摘要： The objective of this study was to determine the black carbon concentration in Beijing in 2003. The aerosol properties were measured using an Aethalometer and a tapered element oscillating microbalance (TEOM) on the roof of the Physics Building of Peking University (39.99º N, 116.31º E) from July to August 2003 and from November 2003 to January 2004. The average black carbon (BC) concentrations in the summer and winter were 8.80 and 11.4 μg/m, respectively. During winter, two different cyclone cut offs were installed at the inlet of an aethalometer. The BC mass concentration in TSP, PM, and PM were obtained. The results indicated that in winter aerosol, 90% of BC exited in PM and 82.6% of BC exited in PM. The BC in PM accounted for 5.11% of the PM mass.

关键词： carbon concentration     Beijing     tapered element     August     aethalometer    

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Phenanthrene sorption to environmental black carbon in sediments from the Song-Liao watershed (China)

Jinghuan ZHANG, Mengchang HE, Chunye LIN, Ke SUN, Bin MEN, John L. ZHOU,

《环境科学与工程前沿（英文）》 2009年 第3卷 第4期   页码 434-442 doi: 10.1007/s11783-009-0150-0

摘要： Black carbon (BC) in ten contaminated sediments from the Song-Liao watershed, NE China, was isolated upon treatments using a combustion method at 375°C, and the isolates’ sorption isotherms for phenanthrene (Phen) were determined. All sorption isotherms were nonlinear and fitted well by the Freundlich model. A negative relation was found between Freundlich sorption nonlinearity parameter ( values) and BC/total organic carbon (TOC) content of the original sediments (=0.687, <0.01), indicating the dominance of BC in Phen sorption nonlinearity. The BC isolates from this industrialized region had values of 0.342 to 0.505 and log values of 6.02 to 6.42(μg·kg·OC)/(μg·L) for Phen. At a given , the BC had higher value than the original sediments, revealing a higher sorption capacity for BC. BC was responsible for 50.0% to 87.3% of the total sorption at =0.05 , clearly indicating the dominance of BC particles in overall sorption of Phen by sediments.

关键词： phenanthrene     sorption     black carbon     sediment     Song-Liao watershed    

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Characteristics of typical dissolved black carbons and their influence on the formation of disinfection

《环境科学与工程前沿（英文）》 2022年 第16卷 第12期 doi: 10.1007/s11783-022-1585-9

摘要：

● The physicochemical and structural properties of DBC were characterized.

关键词： Dissolved black carbon (DBC)     Chlorine     Chloramine     Disinfection by-products (DBPs)     Disinfection by-products formation potential (DBPFP)    

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Nitrogen-doped carbon black supported Pd nanoparticles as an effective catalyst for formic acid electro-oxidation

Na SUN, Minglei WANG, Jinfa CHANG, Junjie GE, Wei XING, Guangjie SHAO

《能源前沿（英文）》 2017年 第11卷 第3期   页码 310-317 doi: 10.1007/s11708-017-0491-5

摘要： Pd nanoparticles supported on nitrogen doped carbon black (Vulcan XC-72R) with two different levels of doping were prepared by the microwave-assisted ethylene glycol reduction process and used as catalyst for the formic acid electro-oxidation (FAEO). The results indicate that the different nitrogen doping contents in Pd/N-C catalysts have a significant effect on the performance of FAEO. A higher N content facilitates the uniform dispersion of Pd nanoparticles on carbon black with narrow particle size distribution. Furthermore, the electrochemical results show that the catalyst with a higher N-doping content possesses a higher catalytic activity and a long-term stability for FAEO. The peak current density of the Pd/N-C (high) catalyst is 1.27 and 2.31 times that of the Pd/N-C (low) and homemade Pd/C-H catalyst. The present paper may provide a simple method for preparation of high-performance anode catalyst for direct formic acid fuel cells (DFAFCs).

关键词： formic acid electro-oxidation     nitrogen doped     oxidized carbon     nitrogen content    

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用于储能设备的一种新型高导电性和高选择性质子交换膜 Article

Kang Huang, Shuhao Lin, Yu Xia, Yongsheng Xia, Feiyan Mu, Yuqin Lu, Hongyan Cao, Yixing Wang, Weihong Xing, Zhi Xu

《工程（英文）》 2023年 第28卷 第9期   页码 69-78 doi: 10.1016/j.eng.2022.11.008

摘要：

Ion conductive membranes (ICMs) with highly conductive proton selectivity are of significant importance and greatly desired for energy storage devices. However, it is extremely challenging to construct fast proton-selective transport channels in ICMs. Herein, a membrane with highly conductive proton selectivity was fabricated by incorporating porous carbon sieving nanospheres with a hollow structure (HCSNs) in a polymer matrix. Due to the precise ion sieving ability of the microporous carbon shells and the fast proton transport through their accessible internal cavities, this advanced membrane presented a proton conductivity (0.084 S·cm−1) superior to those of a commercial Nafion 212 (N212) membrane (0.033 S·cm−1) and a pure polymer membrane (0.049 S·cm−1). The corresponding proton selectivity of the membrane (6.68 × 105 S·min·cm−3) was found to be enhanced by about 5.9-fold and 4.3-fold, respectively, compared with those of the N212 membrane (1.13 × 105 S·min·cm−3) and the pure membrane (1.56 × 105 S·min·cm−3). Low-field nuclear magnetic resonance (LF-NMR) clearly revealed the fast proton-selective transport channels enabled by the HCSNs in the polymeric membrane. The proposed membrane exhibited an outstanding energy efficiency (EE) of 84% and long-term stability over 1400 cycles with a 0.065% capacity decay per cycle at 120 mA·cm−2 in a typical vanadium flow battery (VFB) system.

关键词： Ion conductive membrane     Hollow carbon sieving nanosphere     Proton transport channel     Flow battery    

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Cross-stacked super-aligned carbon nanotube/activated carbon composite electrodes for efficient water

Min Li, Shuai Liang, Yang Wu, Meiyue Yang, Xia Huang

《环境科学与工程前沿（英文）》 2020年 第14卷 第6期 doi: 10.1007/s11783-020-1286-1

摘要： Abstract • A high-performance electrode was prepared with super-aligned carbon nanotubes. • SACNT/AC electrode achieved a ~100% increase in desalination capacity and rate. • SACNT/AC electrode achieved a ~26% increase in charge efficiency. • CUF process with SACNT/AC achieved an up to 2.43-fold fouling reduction. • SACNT/AC imparts overall improved water purification efficiency. The practical application of the capacitive deionization (CDI) enhanced ultrafiltration (CUF) technology is hampered due to low performance of electrodes. The current study demonstrated a novel super-aligned carbon nanotube (SACNT)/activated carbon (AC) composite electrode, which was prepared through coating AC on a cross-stacked SACNT film. The desalination capability and water purification performance of the prepared electrode were systematically investigated at different applied voltages (0.8–1.2 V) with a CDI system and a CUF system, respectively. In the CDI tests, as compared with the control AC electrode, the SACNT/AC electrode achieved an approximately 100% increase in both maximum salt adsorption capacity and average salt adsorption rate under all the applied voltage conditions, demonstrating a superior desalination capability. Meanwhile, a conspicuous increase by an average of ~26% in charge efficiency was also achieved at all the voltages. In the CUF tests, as compared with the control run at 0 V, the treatment runs at 0.8, 1.0, and 1.2 V achieved a 2.40-fold, 2.08-fold, and 2.43-fold reduction in membrane fouling (calculated according to the final transmembrane pressure (TMP) data at the end of every purification stage), respectively. The average TMP increasing rates at 0.8, 1.0, and 1.2 V were also roughly two times smaller than that at 0 V, indicating a dramatical reduction of membrane fouling. The SACNT/AC electrode also maintained its superior desalination capability in the CUF process, resulting in an overall improved water purification efficiency.

关键词： Carbon nanotube     Super aligned     Conductive membrane     Capacitive deionization     Ultrafiltration     Desalination    

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Utilizing transparent and conductive SnO

Jing Gu, Hongtao Yu, Xie Quan, Shuo Chen, Junfeng Niu

《环境科学与工程前沿（英文）》 2020年 第14卷 第4期 doi: 10.1007/s11783-020-1251-z

摘要： Abstract • A novel Z-scheme Si-SnO2-TiOx with SnO2 as electron mediator is first constructed. • Transparent and conductive SnO2 can pass light through and promote charge transport. • VO from SnO2 and TiOx improve photoelectrochemical performances. • Efficient photocatalytic degradations originate from the Z scheme construction. Z-scheme photocatalysts, with strong redox ability, have a great potential for pollutants degradation. However, it is challenging to construct efficient Z-scheme photocatalysts because of their poor interfacial charge separation. Herein, by employing transparent and conductive SnO2 as electron mediator to pass light through and promote interfacial charge transportation, a novel Z-scheme photocatalyst Si-SnO2-TiOx (1

关键词： Z-scheme photocatalyst     Tin oxide     Electron mediator     Organic pollutant    

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基于车载测试的轻型汽油车实际道路黑碳排放特征研究

郑轩, 何立强, 何晓旖, 张少君, 曹翊寰, 郝吉明, 吴烨

《工程（英文）》 2022年 第16卷 第9期   页码 73-81 doi: 10.1016/j.eng.2020.11.009

摘要：

黑碳（BC）是影响气候的第二大人为因素，但BC的辐射效应与其燃烧来源息息相关。BC的人为排放源主要是道路机动车。然而，目前轻型汽油车（LDPV）的BC排放估算存在很大的不确定性，尤其缺乏使用车载测试（PEMS）方法获得的估算结果。本研究开发了一款新型轻型车PEMS平台，并对10 辆在用车进行了实际道路BC排放测试。结果表明，缸内直喷（GDI）车辆BC排放因子（EF）的范围为1.10~1.56 mg∙ km−1，是进气道喷射（PFI）车辆EFs（0.10~0.17 mg∙km−1）的11 倍。冷启动阶段BC排放贡献显著，可占排放总量的2%~33%。与此同时，相对BC EFs 和平均车速存在强相关性（R2 = 0.70），这表明缓解交通拥堵可以有效减少BC排放。此外，BC与颗粒物数浓度（PN）排放呈线性相关（R2 = 0.90）。与PFI 车辆相比，所有速度区间内GDI车辆的PN与BC瞬时排放速率的比值对车辆比功率-速度（VSP-v）的增加并不敏感。

关键词： 黑碳     轻型汽油车     车载测试     实际道路排放    

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Preparation and sedimentation behavior of conductive polymeric nanoparticles

WANG Jixiao, LIU Rui, ZHANG Xiaoyan, ZHOU Zhibin, WANG Zhi, WANG Shichang

《化学科学与工程前沿（英文）》 2008年 第2卷 第3期   页码 231-235 doi: 10.1007/s11705-008-0055-7

摘要： A facile route to prepare FeO/polypyrrole (PPY) core-shell magnetic nanoparticles was developed. FeO nanoparticles were first prepared by a chemical co-precipitation method, and then FeO/PPY core-shell magnetic composite nanoparticles were prepared by in-situ polymerization of pyrrole in the presence of FeO nanoparticles. The obtained nanoparticles were characterized by scanning electronic microscopy (SEM), transmission electronic microscopy (TEM) and laser particle size analyzer. The images indicate that the size of FeO particles is about 10 nanometers, and the particles are completely covered by PPY. The FeO/PPY core-shell magnetic composite nanoparticles are about 100 nanometers and there are several FeO particles in one composite nanoparticle. The yield of the composite nanoparticles was about 50%. The sedimentation behavior of FeO/PPY core-shell magnetic nanoparticles in electrolyte and soluble polymer solutions was characterized. The experimental results indicate that the sedimentation of particles can be controlled by adjusting electrolyte concentration, solvable polymers and by applying a foreign field. This result is useful in preparing gradient materials and improving the stability of suspensions.
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Oil bleed from elastomeric thermal silicone conductive pads

Yuqi Chen,Yakai Feng,Jingqi Zhao,Jingbo Shen,Menghuang Feng

《化学科学与工程前沿（英文）》 2016年 第10卷 第4期   页码 509-516 doi: 10.1007/s11705-016-1586-y

摘要： Oil bleed is a serious problem in elastomeric thermal silicone conductive pads. The components of the oil bleed and the effect of the silicone chemical parameters on the amount of oil bleed have been determined. The main components of oil bleeds are the uncrosslinked silicones in the cured resins, which include the unreacted silicone materials and the macromolecular substances produced by the hydrosilylation reaction. Cured resins with a high crosslinking density and a high molecular weight of vinyl silicone residues had a lower amount of oil bleed. In addition, a low Si-H content also reduced the amount of oil bleed.

关键词： oil bleed     crosslinking density     molecular weight     vinyl silicones     hydrosilicones    

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oxide for active and intelligent packaging: comparison of anthocyanins source from purple tomato or black

《化学科学与工程前沿（英文）》 2023年 第17卷 第6期   页码 704-715 doi: 10.1007/s11705-022-2270-z

摘要： The multifunctional films was prepared by blending chitosan and nano-ZnO with purple tomato anthocyanins or black wolfberry anthocyanins. The properties of films functioned by anthocyanins source and nano-ZnO content were studied. It was found purple tomato anthocyanins showed more significant color change against pH than black wolfberry anthocyanins. The nano-ZnO were widely dispersed in matrix and enhanced the compatibility of anthocyanins with chitosan. However, the anthocyanins source influenced the properties of the films more slightly than nano-ZnO addition. The tensile strength, antioxidant and antibacterial effects of the chitosan films dramatically increased after cooperated by nano-ZnO and anthocyanins, which also enhanced with increase of nano-ZnO content, whereas the elongation at break of the composite films decreased. Especially, the anthocyanin and nano-ZnO promoted the antibacterial activity of films synergistically. Composite films made from black wolfberry anthocyanins exhibited higher mechanical performance than those made from purple tomato anthocyanins but weaker antibacterial effects. The purple tomato anthocyanins/chitosan and nano-ZnO/purple tomato anthocyanins/chitosan films effectively reflected pork spoilage, changing their colors from dark green to brown, indicating the potential for applications in active and intelligent food packaging.

关键词： bio-based     multifunction     colorimetric indicator     active and intelligent packaging    

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标题 作者 时间 类型 操作

Enhancement of the electrocatalytic oxidation of antibiotic wastewater over the conductive black carbon-PbO

Xiangyu Wang, Yu Xie, Guizhen Yang, Jiming Hao, Jun Ma, Ping Ning

期刊论文

Preparation of nZVI embedded modified mesoporous carbon for catalytic persulfate to degradation of reactiveblack 5

期刊论文

Contribution of black carbon to nonlinearity of sorption and desorption of acetochlor on sediment

Jianqiu LIU, Yaobin ZHANG, Hong CHEN, Yazhi ZHAO, Xie QUAN

期刊论文

Effect of carbon black on the dynamic moduli of asphalt mixtures and its master curves

Chuangmin LI, Fanbo NING, Yuanyuan LI

期刊论文

Observation of black carbon aerosol in Beijing, 2003

LOU Shujuan, MAO Jietai, WANG Meihua

期刊论文

Phenanthrene sorption to environmental black carbon in sediments from the Song-Liao watershed (China)

Jinghuan ZHANG, Mengchang HE, Chunye LIN, Ke SUN, Bin MEN, John L. ZHOU,

期刊论文

Characteristics of typical dissolved black carbons and their influence on the formation of disinfection

期刊论文

Nitrogen-doped carbon black supported Pd nanoparticles as an effective catalyst for formic acid electro-oxidation

Na SUN, Minglei WANG, Jinfa CHANG, Junjie GE, Wei XING, Guangjie SHAO

期刊论文

用于储能设备的一种新型高导电性和高选择性质子交换膜

Kang Huang, Shuhao Lin, Yu Xia, Yongsheng Xia, Feiyan Mu, Yuqin Lu, Hongyan Cao, Yixing Wang, Weihong Xing, Zhi Xu

期刊论文

Cross-stacked super-aligned carbon nanotube/activated carbon composite electrodes for efficient water

Min Li, Shuai Liang, Yang Wu, Meiyue Yang, Xia Huang

期刊论文

Utilizing transparent and conductive SnO

Jing Gu, Hongtao Yu, Xie Quan, Shuo Chen, Junfeng Niu

期刊论文

基于车载测试的轻型汽油车实际道路黑碳排放特征研究

郑轩, 何立强, 何晓旖, 张少君, 曹翊寰, 郝吉明, 吴烨

期刊论文

Preparation and sedimentation behavior of conductive polymeric nanoparticles

WANG Jixiao, LIU Rui, ZHANG Xiaoyan, ZHOU Zhibin, WANG Zhi, WANG Shichang

期刊论文

Oil bleed from elastomeric thermal silicone conductive pads

Yuqi Chen,Yakai Feng,Jingqi Zhao,Jingbo Shen,Menghuang Feng

期刊论文

oxide for active and intelligent packaging: comparison of anthocyanins source from purple tomato or black

期刊论文