Catalysts
·
2021
·Vol. 11
·期 11
·1414
·
IF 4.146
Yekun Ji,Ye Zhou,Jinnan Wang,Aimin Li,Weilin Bian,Philippe François-Xavier Corvini
A visible-light-Fenton-like reaction system was constructed for the selective conversion of peroxymonosulfate to sulfate radical. Au@CoS, when doped on monoclinic BiVO4{010} facets, promoted spatial charge separation due to the different energy band between the m-BiVO4{010} and {110} facets. The visible-light response of m-BiVO4was enhanced, which was attributed to the SPR effect of Au. And the photogenerated electrons were transferred from the m-BiVO4{010} facet to Au via a Schottky junction. Owing to higher work function, CoS was able to capture these photoelectrons with acceleration of the Co(Ⅱ)/Co(Ⅲ) redox, enhancing peroxymonosulfate conversion to sulfate radical (Co2++ HSO5−→ Co3++ •SO4−+ OH−). On the other hand, holes accumulated on m-BiVO4{110} facets also contributed to organics oxidation. Thus, more than 95% of RhB was degraded within 40 min, and, even after five cycles, over 80% of RhB could be removed. The radical trapping experiments and EPR confirmed that both the sulfate radical and photogenerated hole were the main species for organics degradation. UV-vis DRS, photoluminescence (PL) and photoelectrochemical analyses also confirmed the enhancement of the visible-light response and charge separation. In a pilot scale experiment (PMS = 3 mM, initial TOC = 151 mg/L, reaction time = 4 h), CoS-Au-BiVO4loaded on glass fiber showed a high mineralization rate (>60%) of practical wastewater.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 71
·66963-66970
·
IF 3.289
Haiguan Yang,Junqi Zha,Peng Zhang,Yuhao Xiong,Linjing Su,Fanggui Ye
CoS, which was prepared using a facile solvothermal method, and characterized using various analytical techniques, was demonstrated for the first time to exhibit intrinsic peroxidase-like activity. CoS catalyzed the oxidation of the peroxidase substrate 3,3′,5,5′-tetramethylbenzidine in the presence of H2O2 rendering the reaction solution blue, which is the principle used for H2O2 sensing. The mechanism of the CoS catalysis was also investigated. Under optimal conditions, the linearity of H2O2 detection ranged from 0.05 to 0.8 mM (R2 = 0.9965). More importantly, using the reducibility of glutathione and the strong affinity to thiol compounds exhibited by mercury ions (Hg2+), a novel “off–on” colorimetric sensor for Hg2+ determination was designed using CoS as a peroxidase mimics. The analytical platform for Hg2+ determination was developed, ranging from 0.25 to 3 μM (R2 = 0.9965). The limit of detection was 0.1 μM. CoS exhibited several advantageous features including good chemical stability, ease of preparation, simple purification, and excellent reproducibility.
研究领域:
生物化学
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分析化学
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材料科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 48
·18164-18173
·
IF 8.067
Weifeng Kong,Zipeng Xing,Hang Zhang,Bin Fang,Yongqian Cui,Zhenzi Li,Peng Chen,Wei Zhou
A hollow polyhedral structure can effectively capture light and facilitate carrier separation, thus enhancing photocatalytic performance. Herein, hollow cubic CdS@CoS/WS2 dual S-scheme heterojunction superstructure photocatalysts are fabricated using a simple sulfidation and hydrothermal method. CdS@CoS/WS2 with a band gap of 1.59 eV and a relatively narrow band gap broadens the photoreaction to the near-infrared region and shows a good photothermal effect, which can promote photocatalytic reactions. It shows a relative specific surface area of 91.58 m2 g−1, which provides abundant surface-active sites to enhance the photocatalytic reaction. Under light conditions, the photocatalytic degradation ratios of CdS@CoS/WS2 for tetracycline and bisphenol A are up to 98.9 and 99.1%, and the hydrogen evolution efficiency is also up to 10.62 mmol h−1 g−1. The enhanced photothermal–photocatalytic performance could be due to the formation of a dual S-scheme heterojunction superstructure that facilitates space charge separation, a narrow band gap and a mesoporous hollow structure promoting solar light utilization, providing abundant surface-active sites and enhanced mass transfer. This simple strategy provides a new idea for the construction of high-performance hollow superstructure photocatalysts.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Shengjun Liu,Yan Ma,Dianjun Chi,Yudie Sun,Qian Chen,Jian Zhang,Ziguo He,Lifang He,Kui Zhang,Bo Liu
In recent years, there have been many studies on photocatalytic water splitting, but there are still few high-efficiency photocatalysts for photocatalytic seawater splitting. In this study, a series of hollow Co sulphide-supported CdS catalyst (H–CoS/CdS) composite photocatalysts were prepared by loading CdS onto the surface of H–CoS, which can be used for efficient H 2 production in pure water and simulated seawater. The heterojunction H–CoS/CdS exhibited H 2 production of 572.4 μmol g −1 (4 h) from simulated seawater, which is 97.7 and 2.96 times those of H–CoS and CdS, respectively. The h-CoS cocatalyst extended the light absorption range of CdS, improved the chemical stability, and significantly enhances the charge separation efficiency. This study provides guidance for the reasonable design of a photocatalytic seawater-based H 2 production catalyst with high efficiency and low cost.
研究领域:
材料科学
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化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Tauqeer Haidar Qamar,Sibt ul Hassan,Nouman Ahmed,Muhammad Javed Qasim,Sain Bux Jamali,Lei Ma,Shengxiang Huang,Lianwen Deng
The rational design of heterostructures with well-defined chemical composition and spatial configuration stands as a key approach in achieving exceptional performance in electromagnetic wave absorption. This innovative work investigated the electromagnetic wave absorption properties of flower-like CoS/Fe 3 O 4 @PPy composites synthesized by hydrothermal method and in situ polymerization. A comprehensive investigation was conducted into the phase composition, morphology, and absorption properties. Flower-like CoS/Fe 3 O 4 @PPy composite demonstrates remarkable microwave reflection loss of −58.4 dB and effective absorption bandwidth of 5.55 GHz in thickness of 3.1 mm. The superior performances are attributed to the synergistic interplay of interfacial polarization, dielectric loss, magnetic loss, and optimized impedance matching. Furthermore, sufficient decrease in radar cross-section value was observed for the optimal sample with reduction of 41.23 dBm². These results highlight the considerable potential of flower-like CoS/Fe 3 O 4 @PPy composites in addressing electromagnetic pollution and stealth applications.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jiayu Zhan,Liping Liang,Ying Lu,Shanping Jiang,Gunel Imanova,Sridhar Komarneni,Jianfeng Ma
An efficient and stable LaFeO 3 @CoS Z-scheme heterojunction photocatalyst was prepared through the hydrothermal method (HT). Photocatalytic activity of the LaFeO 3 @CoS was assessed by activating persulfate under visible light for the degradation of tetracycline (0.1 g/L). Under the condition of 0.06 g/L of KHSO 5 (Peroxymonosulfate, PMS), the degradation efficiency of 88.7 % was achieved in 40 min using the 0.02 g/L of developed photocatalyst. The degradation kinetic constants of LaFeO 3 @CoS were 2.79 and 2.23 times higher than those of LaFeO 3 and CoS, respectively. Furthermore, the catalyst exhibited excellent stability over five consecutive degradation cycles. Possible degradation mechanisms and the electron transfer mechanism of the heterojunction formed by the LaFeO 3 @CoS were investigated by quenching experiments, nitrogen N₂ purging experiments, electron spin resonance (ESR) measurements and corresponding electrochemical analyses. In the LaFeO 3 @CoS/Vis/PMS system, the Z-scheme charge transfer pathway not only accelerated charge transport efficiency but also effectively spatially separated electrons and holes, enhancing the photocatalytic performance of the photocatalyst. Additionally, the generation of reactive species such as 1 O 2 , O 2 • − , and SO 4 • − significantly contributed to the improved degradation efficiency of the present catalyst during the degradation process.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Cong Pan,Yihui Zhang,Wenyu Wang,Feng Wu,Zhixiong You,Jing Xu,Jinjun Li
Chlorobenzene (CB) is a typical example of chlorinated volatile organic compounds (CVOCs) that require pollution control. Using wet scrubbers coupled with advanced oxidation processes (AOPs) has become a promising technique to degrade gaseous CVOCs. Here, a CoS-loaded porous graphitized carbon (PGC) served as an adsorbent for CVOCs and a catalyst to activate peroxymonosulfate (PMS) to construct a wet scrubber for CB degradation. CoS/PGC exhibited excellent catalytic performance at pH 9.0; a 0.1 g/L CoS/PGC dosage and a 10 mM initial PMS concentration achieved 90% CB (25 ppmv) removal within 500 min. Electron spin resonance and quenching experiments identified hydroxyl radicals and sulfate radicals as the main reactive oxygen species that removed CB. In addition, we proposed possible CB degradation pathways by intermediates identified using liquid chromatography-mass spectrometry and density functional theory calculations. Electrochemical experimental results such as cyclic voltammetry and Nyquist proved that CoS/PGC has superior electron transport capacity compared to CoS. A possible catalytic mechanism for CB removal in CoS/PGC + PMS system was proposed by ESR and XPS spectra. By using continuous dosing or pulsed dosing to replenish PMS to maintain its suitable concentration, the system achieves a commendable long-term efficiency. Moreover, this catalyst displayed excellent recyclability and universal applicability to treat various gaseous CVOCs as well as the scrubbing solution replacement with tap water for efficient CB removal. This study may provide new fundamental insights into the PGC-supported catalysts for wet oxidation of CVOCs or other contaminants.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2015
·Vol. 27
·期 2
·1457-1462
·
IF 1.569
Sun Yunfei,Yang Lili,Wei Maobin,Chen Gang,Che Guangbo,Yang Jinghai,Wang Zhe,Gao Zhiyuan
Well aligned CoS NRAs with different length have been grown on ITO substrates by a simple chemical method without any catalyst. The morphology properties of the as grown CoS nanostructures were investigated by SEM and TEM images. From the SEM results measured from the tilt-view, with the reaction time increasing, the length of CoS nanorods increased. However these CoS(6) NRAs partially aggregated, which will decrease the surface area of CoS NRAs. The optimized photovoltaic performance with a Voc of 0.66 V, a Jsc of 1.96 mA/cm 2 , an FF of 0.43, and a η of 0.64 % is obtained from the device based on CoS(4) ANRAs electrode. Although the quantum dot sensitized solar cells (QDSSCs) with CoS NRAs show smaller η values than that of the QDSSC with sputtered Pt counter electrode, the CoS material will be an efficient alternative for the Pt electrode due to its excellent catalytic ability and low cost.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
Materials
·
2020
·Vol. 13
·期 20
·4527
·
IF 3.057
Hui Liu,Ling Li,Xinxin Wang,Guangzhen Cui,Xuliang Lv
A novel CoS@Fe3O4@rGO aerogel with a unique 3D porous heterostructure was prepared via the solvothermal method, in which cobalt sulfide (CoS) microspheres embedded with Fe3O4nanoparticles were randomly scattered on reduced graphene oxide (rGO) flakes. The introduction of magnetic Fe3O4nanoparticles and rGO regulated the impedance matching, and the excellent electromagnetic wave (EMW) absorption capability of the CoS@Fe3O4@rGO aerogel could be attributed to optimal dielectric loss and abundant conductive networks. The results demonstrated that the minimum reflection loss (RL) value of CoS@Fe3O4@rGO aerogel was −60.65 dB at a 2.5 mm coating thickness with an ultra-wide bandwidth of 6.36 GHz (10.24–16.6 GHz), as the filler loading was only 6 wt%. Such a lightweight CoS@Fe3O4@rGO aerogel with an outstanding absorbing intensity and an ultra-wide effective absorption bandwidth could become a potential EMW absorber.Keywords:microwave absorption;rGO aerogel;CoS;porous structure
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Dongsheng Luo,Hongfei Yin,Jingxin Li,Binqiang Tian,Huaiqi Li,Yaoguang Li,Chunguang Li,Yuehua Zhang,Mengqi Chen,Yanqiu Jing
Nowadays, researchers make great effects to eliminate some harmful chemicals produced by tobacco. Photocatalysis is one of the most advanced techniques and can degrade organic contaminants effectively. In this paper, a novel CoS@ZnIn 2 S 4 -Ce heterostructured cage was successfully prepared for degradation. After various characterizations, CoS@ZnIn 2 S 4 -Ce exhibited a significant separation of the photo-generated electrons and holes and could degrade phenol effectively no matter under UV light (98.46 %) or visible light (96.72 %). Furthermore, CoS@ZnIn 2 S 4 -Ce could degrade nicotine (91.62 %), benzopyrene (84.65 %) and nitrosamine (99.18 %) effectively under visible light. The effects of the initial conditions on degradation of phenol was also well investigated. The optimal conditions were 0.5 g/L of catalyst dosage, 4.35–7.00 of pH value and 10 mg/L of phenol initial concentration. OH and O 2 − were the main active radicals during the photo-degradation process. On this basis, a possible photocatalytic degradation pathway for degradation of contaminants produced by tobacco are proposed.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Dongyuan Li,Xiaojun Peng,Rui Zhang,Yadong Chen,Xianwei Dai,Wenling Wang
The Z-type heterojunction CoS/Bi 4 O 5 I 2 material was prepared by the solvothermal method. The crystal structure and surface elemental valence state of the material were investigated by XRD, XPS, and other characterization methods. The microstructure of the material was investigated by SEM, BET, and other methods. In the experiment of degradation of 20 mg/L tetracycline hydrochloride using the prepared photocatalytic materials, the optimal photocatalytic performance of CoS/Bi 4 O 5 I 2 was explored with the introduction of 1.5 % CoS, and the degradation rate could reach 94.7 %. It was also found that 1.5 % CoS/Bi 4 O 5 I 2 had stable photocatalytic performance and good photocatalytic performance for all tetracycline antibiotics. Then the possible degradation pathways in the degradation process of TCH were explored using GC-MS, and the acute toxicity of the intermediates was evaluated by ECOSAR software. The UV–vis-DRS results showed that the overall photoelectrical properties of the composites were enhanced after introducing CoS with broad-spectrum absorption properties, and the PL and EIS results also proved the collation. The possible degradation mechanism of the CoS/Bi 4 O 5 I 2 system was also speculated by combining the free radical trapping experiments with the M-S curve results. The increasing severity of antibiotic pollution necessitates the development of highly efficient photocatalytic materials to enhance environmental remediation capabilities. Traditional photocatalysts suffer from high recombination rates of photogenerated carriers and low degradation efficiency. To enhance the photocatalytic activity and cycling stability of Bi 4 O 5 I 2 , we synthesized a CoS/Bi 4 O 5 I 2 heterojunction material via a solvothermal method. Using 20 mg/L TCH as a model pollutant, we investigated the photocatalytic efficiency of the prepared material. Through comprehensive experiments and structural analyses using XRD, XPS, and SEM, we explored the photocatalytic degradation performance and mechanism of tetracycline, confirming that CoS/Bi 4 O 5 I 2 is an ideal material for constructing a Z-type heterojunction, effectively reducing the recombination of photogenerated electron-hole pairs. Compared to pure Bi 4 O 5 I 2 , the CoS/Bi 4 O 5 I 2 composite exhibits superior performance in improving charge separation efficiency and enhancing visible light absorption. This study successfully constructs a Z-type heterojunction with efficient electron-hole separation, significantly enhancing photocatalytic efficiency. The composite material holds great potential for antibiotic pollution treatment, while the elucidation of its photocatalytic degradation mechanism provides theoretical guidance for designing novel photocatalysts.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 7
·076502
·
IF 4.386
Zhuangzhuang Yin,Shihan Qi,Shangkun Deng,Jun Guo,Wei Gan,Peng Chen,Chunsheng Ding,Ziliang Li,Jianrou Li,Yuqing Lu,Ziwei Zhao,Qi Ling,Miao Zhang,Zhaoqi Sun
Transition metal sulfides are widely used for the modification of TiO2 to improve its light absorption range due to their small bandgaps. In this work, novel CoS/CuS/TiO2 was synthesized via a simple one-pot hydrothermal preparation method. Using various characterization techniques, CoS/CuS/TiO2 was found to demonstrate excellent photoelectrochemical performance and photocatalytic activity for the degradation of tetracycline hydrochloride. The CoS/CuS/TiO2 catalyst showcased a maximum photocurrent density of 55 μA cm−2, which was 7.8 times higher than that of unmodified TiO2 nanorods. Under visible light irradiation using Xe lamp, the photocatalytic degradation efficiency of CoS/CuS/TiO2 on tetracycline hydrochloride was found to be significantly improved, where it recorded an excellent degradation rate of 64.0% at 90 min. The charge transfer mechanism of the proposed material was also investigated.
研究领域:
材料科学
·
环境科学
·
光催化技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）