JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2021
·Vol. 329
·期 2
·1125-1133
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IF 1.371
Wu Fan,Zhang Zhibin,Cheng Zhongping,Zhou Runze,Lin Yuling,Liu Yuhui,Wang Youqun,Cao Xiaohong,Liu Mingguang,Liu Yunhai
The photocatalytic reduction of soluble \({\text{UO}}_{2}^{2 + }\) from radioactive wastewater is becoming an effective method to reduce radioactive pollution, while available catalysts are considerable limitation. Herein, the ZnS@g-C 3 N 4 (ZSGCN) heterojunctions complexes were compounded as catalysts to reduce \({\text{UO}}_{2}^{2 + }\) . The results from TEM, XRD, XPS, EIS, DRS and PL showed that the ZnS nanoparticles combined with graphite carbon nitride (GCN), which is the construction of heterojunctions broadened the absorption range of sunlight. The ZSGCN-5 presented the optimal photocatalytic reduction activity to \({\text{UO}}_{2}^{2 + }\) , which was 4.34 times than that of pristine GCN. The ZSGCN-5 heterojunction becomes a promising photocatalyst for radioactive environment remediation.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2015
·Vol. 30
·期 3
·160-166
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IF 2.248
Yi Zhang,Rongying Wen,Di Guo,Hongxu Guo,Jianhua Chen,Zishan Zheng
ZnS@g-C 3 N 4 composite photocatalyst containing g-C 3 N 4 nanoplates and ZnS nanoparticles was facilely fabricated by one-step calcination from the complex sulfatotris(thiourea)zinc(II) for the first time. Thiourea serves not only as the sulfur source of ZnS, but also as the precursor of g-C 3 N 4 . The as-prepared composite photocatalyst was then characterized using Fourier transform infrared, diffuse reflectance and X-ray photoelectron spectroscopies, X-ray diffraction, scanning electron microscopy and Brunauer–Emmett–Teller surface area measurements. It displays a higher visible-light photocatalytic activity, including an ability to photodecompose water to produce hydrogen and organic dye photodegradation, than ZnS alone. The photocatalytic mechanism is also discussed in detail. Photoluminescence spectra and electrochemical impedance spectroscopy Nyquist plots indicate that the formation of the ZnS@g-C 3 N 4 composite contributes to the separation of photoinduced charge carriers which enhances its photocatalytic activity. This study presents a new method for the fabrication of novel sulfide/g-C 3 N 4 composites with enhanced photocatalytic performance. Copyright © 2015 John Wiley & Sons, Ltd.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROANALYSIS
·
2025
·Vol. 37
·期 7
·e70023
·
IF 2.3
Dongxue Sun,Shijie Chen,Jinlong Li,Guozhe Sui,Dongxuan Guo,Ning Liu,Renjiang Lv,Shuang Sui
In this study, ZnO/ZnS/g-C 3 N 4 composite materials were successfully synthesized via a combination of hydrothermal treatment and calcination for the electrochemical detection of ascorbic acid (AA). A systematic experimental design was implemented to evaluate the influence of key parameters, including the amount of ZnS added, the loading ratio of ZnO/ZnS onto g-C 3 N 4 , and the pH conditions during detection, on sensor performance. Comprehensive material characterization was conducted using scanning electron microscopy transmission electron microscopy X-ray diffraction, X-ray photoelectron spectroscopy, and Fourier-transform infrared spectroscopy, providing detailed insights into the composites’ microstructure, crystallinity, elemental composition, and chemical bonding. The sensor exhibited excellent performance for AA detection, with a broad linear detection range of 20–5000 μM, a low detection limit of 1.2 μmol/L (S/N = 3), and high recovery rates between 98.23% and 105.02%, accompanied by low relative standard deviations (1.56–3.12%). Furthermore, application of the sensor in cyclic voltammetry analysis of commercial vitamin C tablets yielded accurate and reliable results, confirming its strong stability, anti-interference capacity, and reproducibility.
研究领域:
材料科学
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电化学
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纳米技术
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Qiao Wang,Peng Wang,Peng Xu,Yang Li,Jiajun Duan,Guangshan Zhang,Limin Hu,Xiaojing Wang,Wen Zhang
The visible-light responsive hybrid catalysts (Zn 0.94 Fe 0.04 S/g-C 3 N 4 or ZCN) were synthesized by a rapid microwave hydrothermal method. Our results showed that the deposition of Fe-doped ZnS onto g-C 3 N 4 sheets prevented the aggregation of Zn 0.94 Fe 0.04 S and increased the surface area for mass transfer and light absorption. The highest degradation rate of p -nitrophenol (PNP) was 96.0% and the total organic carbon removal rate was 55.4% after 60-min simulated solar light irradiation on ZCN with Fe doping and g-C 3 N 4 loading ratios of 0.04 and 0.20, respectively. Hydroxyl radical played a dominant role in PNP degradation, which was primarily attributed to the photo-Fenton reactions. The PNP degradation pathway involved denitration and hydroxylation reactions according to the Density Function Theory calculations and HPLC-MS/MS results. The QSAR analysis indicated that the toxicity of most intermediates was lower than PNP. This study develops novel materials with superior photocatalytic activity for elimination of refractory organic pollutants in wastewater.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Chengyuan Yang,Jing Wang,Rong Wang,Wenxin Zhu,Liang Zhang,Ting Du,Jing Sun,Ming-Qiang Zhu,Yizhong Shen,Jianlong Wang
Multi-pollutants environment coexisted organic and inorganic pollutants has become a common phenomenon, seriously affecting water biodiversity and human water security. Currently, the removal of organic and inorganic pollutants by photocatalysis are mostly in own single-pollutant environment, not in multi-pollutants system, where the common photocatalysts cannot achieve efficiently charge separate and transfer with low reactive oxygen species (ROS) efficiency. Herein, we constructed an efficient cascaded Z-scheme heterojunction Co 9 S 8 @defective ZnS/g-C 3 N 4 (C@DZ/N) composed of defective engineering in hollow nanocubes, which achieved excellent photodegradation activity (98.93 % for ciprofloxacin (CIP) and 97.18 % for Cr(VI) at 90 min) in multi-pollutants environment, significantly higher than the hollow cubic with Z-scheme heterojunction in single-pollutant environment (98.07 % for CIP and 98.72 % for Cr(VI) at 140 min). Defective ZnS acts as the core for direct charge transfer and separation to form a unique cascaded Z-scheme heterojunction system that blocks the type II charge transfer pathway to achieve ultra-efficient charge transfer. Furthermore, the structural characterization and ROS experimental results based on multi-pollutants models show that the cascade Z-scheme system greatly facilitates the ROS release kinetics and further leads to more electron-deficient cubic surfaces while increase the directional conversion to singlet oxygen ( 1 O 2 ) in multi-pollutants environment. Further tests of intermediates and reusability indicated its potential for the high-efficient treatment of multiple pollution systems.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
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