CERAMICS INTERNATIONAL
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2023
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IF 5.2
Ziyu Zhang,Xiaoli Dong,Yu Wang,Nan Zheng,Hongchao Ma,Xiufang Zhang
Because of its superior coupling and composition matching, narrow band gap semiconductor heterojunction can increase redox activity, reduce carrier recombination, and enhance light absorption. When heterojunction photocatalysts are constructed properly, it is thought to be an efficient technique to boost photocatalytic activity. The Co 9 S 8 /CdS heterostructures in this study were created using a two-step solvothermal technique. The as-prepared Co 9 S 8 /CdS heterostructures exhibit outstanding photocatalytic degradation performance of methyl orange (MO) owing to their unique structure and compositional properties. Co 9 S 8 /CdS heterostructures can offer a remarkable MO degradation rate that can reach 97% in 25 min when illuminated by visible light. In addition to demonstrating better long-term stability after numerous cycling photocatalytic tests, experiments with radical trapping have shown that ·O 2 − is crucial for the photocatalytic degradation of MO. The pertinent photogenerated charge transfer and catalytic mechanisms of Co 9 S 8 /CdS heterostructures are suggested and examined.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Lixiang Zhang,Luping Feng,Jiatian Jiang,Pan Li,Xi Chen,Sheng Zhang,Yuan Gao,Ruoxi Hong,Guofu Chen,Guojiang Mao,Hua Wang
A highly sensitive and visible-light-driven photoelectrochemical (PEC) sensor has been constructed for the quantitative assay of organophosphorus pesticides like chlorpyrifos (Chlo) using hollow Co 9 S 8 @CdS heterostructures . The Co 9 S 8 @CdS heterostructures were created by growing CdS onto Co 9 S 8 surface via one-step oil-bath route, of which Co 9 S 8 was fabricated with hollow tubular structures through the Co(CO 3 ) 0.35 Cl 0.2 (OH) 1.1 -templated solvothermal method . It was discovered that the so-obtained Co 9 S 8 @CdS with direct Z-scheme heterojunctions could exhibit larger photocurrents than the Co 9 S 8 or CdS because of the greatly enhanced separation efficiency of photo-generated carriers. What’s more, the photocurrent signal of Co 9 S 8 @CdS-based PEC sensor could be selectively inhibited with the addition of Chlo through the specific chelation between the N and S atoms of Chlo with C N and P S groups and Co sites of Co 9 S 8 @CdS so as to suppress the carriers transferring. The developed PEC sensor could exhibit a linear response for Chlo ranging from 0.050 to 1000 ppb, with the detection limit value down to 0.015 ppb, which was far below than those of currently reported PEC sensors. Besides, the proposed routes may provide guidelines for designing various direct Z-scheme heterojunction-based PEC analysis platforms for determining environmental pollutants like Chlo.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Luping Feng,Jianghong Wang,Lixiang Zhang,Jiadong Li,Yifan Zhang,Minghong Xu,Peisong Tang,Hua Wang
Tubular Co 9 S 8 /CdS heterostructures have been successfully synthesized by in-situ growing CdS onto Co 9 S 8 nanotubes through a simultaneous immobilization and in-situ reduction strategy. It turned out that the so-obtained heterostructure with Co 9 S 8 /CdS molar ratio of 1/10 can display a broad light absorption edge and especially much enhanced capacity for photocatalytic reduction of Cr(VI) under visible light . The characterization analysis and experimental results suggested that an interfacial electrostatic field between Co 9 S 8 and CdS elements in the heterostructure could be constructed due to their different Fermi levels , allowing for more quantities of highly reductive electrons to participate in the photocatalytic reaction. Therefore, the so-obtained Co 9 S 8 /CdS (1/10) heterostructures could achieve the photocatalytic reduction efficiency of 100% within 20 min, which was more than two and four times larger than that of pristine CdS and Co 9 S 8 , respectively. Moreover, the possible photocatalytic reaction mechanism for reducing Cr(VI) was investigated and found to follow the direct Z-scheme charge transfer pathway. This novel fabrication route for composite photocatalysts with tubular heterostructures could lead to the widespread implementations for the elimination of various harmful pollutants in the process of environmental governance.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Nano Materials Science
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2026
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IF 17.9
Shuanghe Fu,Wei Gu,Haijun Pang,Xiaojing Yu,Xinming Wang,Guixin Yang,Yongbin Song,Chunjing Zhang,Sitaramanjaneya Mouli Thalluri,Zhipeng Yu
Hydroquinone (HQ), a toxic and persistent pollutant, requires sensitive and reliable detection strategies beyond conventional chromatographic or electrochemical methods. Here, we report a nitrogen-doped 1T/2H-MoS 2 /Co 9 S 8 /CdS ternary nanozyme synthesized via a urea-mediated hydrothermal route. Urea acts as a bifunctional agent, simultaneously stabilizing the metastable 1T-MoS 2 phase and introducing sulfur vacancies through nitrogen substitution. This defect-phase engineering optimizes the electronic structure, as evidenced by a 0.2 eV positive shift in Mo 3d binding energy, and exposes coordinatively unsaturated Mo sites that accelerate hydroxyl radical (•OH) generation. Coupled with the redox activity of Co 9 S 8 and the adsorption capability of CdS, the composite exhibits markedly enhanced peroxidase-like activity, characterized by higher catalytic turnover and stronger H 2 O 2 affinity compared to undoped systems. A colorimetric sensor constructed from this platform enabled ultrasensitive HQ detection with a detection limit of 0.29 μM and excellent recoveries (100.18% to 101.64%) in spiked real water samples, while maintaining strong selectivity and operational stability. This work establishes a nitrogen-doping-driven paradigm for phase stabilization and defect regulation, offering a generalizable strategy for designing high-performance nanozymes for environmental monitoring.
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产品关联
DOI
高影响因子
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