JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Qiqi Gu,Shijin Cheng,Qiaoyi Xiao,Qianchen Ou,Hongmei Wang,Yuan Lian,Liping Guo
The FeCo-LDH/Cd 1-x Zn x S nanocomposite was synthesized via an impregnation method, employing FeCo-LDH as a cocatalyst for simultaneous upcycling of polyethylene terephthalate (PET) plastics and photocatalytic hydrogen production. The 5 %LDH/Cd 0.5 Zn 0.5 S nanocomposite demonstrated an optimal hydrogen evolution rate of 3.67 mmol·g −1 ·h −1 in alkaline PET solution, which is 2.3 times higher than pristine Cd 0.5 Zn 0.5 S. Notably, the photocatalyst retained stable performance over six recycling tests without significant activity loss. Concurrently, PET oxidation by photogenerated holes yielded acetate as the primary product, achieving an 87 % yield. The real-world applicability of this approach was further validated through the successful photoreforming of a PET bottle. UV–vis DRS, TRPL, and PEC analyses revealed that the incorporation of appropriate amount of FeCo-LDH significantly enhanced charge carrier separation, thereby boosting the photocatalytic activity. Furthermore, UPS and DFT calculations elucidated the mechanistic pathway for PET conversion and hydrogen production over FeCo-LDH/Cd 0.5 Zn 0.5 S. This study presents a promising strategy for co-producing hydrogen and value-added chemicals from PET waste, highlighting its potential for practical recycling applications.
研究领域:
材料科学
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环境科学
·
能源化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Zijie Zhang,Qiao Yin,Linlin Xu,Jiaming Zhai,Chun Guo,Yongqiang Niu,Liwei Zhang,Mingliang Li,Hailong Wang,Li Guan,Rui Zhang,Hongxia Lu
The construction of new semiconductor photocatalysts toward the enhancement of photocatalytic activity under visible-light is crucial for a sustainable and clean future. In this paper, cation doping and heterojunction construction were synergistically used to synthesize g-C 3 N 4 matrix composite with a narrow band gap and low recombination rate of photogenerated electron-hole pairs. Potassium-doped-C 3 N 4 (KCN) was used as the matrix to construct semiconductor heterojunction with Cd 0.5 Zn 0.5 S (CZS) by hydrothermal method . The resulting composites were characterized through X-ray diffraction, infrared radiation, X-ray photoelectron spectroscopy, field-emission scanning electron microscopy, and ultraviolet–visible diffuse reflectance spectroscopy techniques to examine its phase structure, morphological, valance state and optical properties respectively. The photocatalytic performance of the samples evaluated by H 2 evolution and degrading the Rhodamine B (RhB) aqueous solution. After 12 h hydrothermal reaction at 140 °C, CZS particles uniformly distributed on the KCN matrix. The photocatalytic hydrogen production rate (HPR) of the sample loaded 24 wt% CZS (KCN/CZS 24 wt%) reaches 1.83 mmol/g·h which is 5.6 times of pristine g-C 3 N 4 . The degradation rate constant on RhB of KCN/CZS 24 wt% is ( k = 0.041 min −1 ) 7.9 times higher than g-C 3 N 4 . The enhanced photocatalytic activity can be attributed to the well-matched energy level of KCN and CZS as well as the extended light absorption of the composites.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 32
·期 1
·015706
·
IF 3.551
Qiao Yin,Zhenzhen Cao,Zhiyuan Wang,Jiaming Zhai,Mingliang Li,Li Guan,Bingbing Fan,Wen Liu,Gang Shao,Hongliang Xu,Hailong Wang,Rui Zhang,Hongxia Lu
Photocatalytic degradation of pollutants has been proved to be an effective strategy for wastewater treatment. Herein, TiO2 nanoparticles were synthesized on a Ti3C2 matrix by in situ growth, forming Z-scheme TiO2@Ti3C2/Cd0.5Zn0.5S (TO/CZS) multilevel structured nanocomposites via one-step hydrothermal route. The effects of hydrothermal temperature and Cd0.5Zn0.5S content on microstructure and properties of composites were assessed. TO/CZS nanocomposites were probed into phase composition, morphological and optical properties with x-ray diffractometer, infrared radiation, scanning electron microscope and UV–vis reflective spectra. Following the hydrothermal reaction at 160 °C for 12 h, TiO2 nanoparticles of 30 nm in diameter were generated in situ on Ti3C2 lamina and Cd0.5Zn0.5S particles were evenly distributed on the Ti3C2 matrix. The photocatalytic activity of TO/CZS composites were evaluated, which found that degradation rate constant (k = 0.028 min−1) of TO/CZS-40 on Rhodamine B was 5.19 times that of pure TiO2 and 4.48 times that of Cd0.5Zn0.5S. Through anchoring Ti3C2 as an electron transition mediator and combination with TiO2 and Cd0.5Zn0.5S, the new Z-scheme between TiO2 oxidized by Ti3C2 and Cd0.5Zn0.5S establishes a multilevel structure of separating electron-hole pairs. This work demonstrates a valid way to control electrons and hole transfer directions efficiently through designing multilevel semiconductor structural designs.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
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2025
·
IF 3.5
Du Jinpeng,Lan Meng,Xiang Yulong,Dong Xiaoli,Zheng Nan,Wang Yu
Photocatalysis has been extensively applied in organic pollutant degradation, and the key focus is on developing efficient and sustainable photocatalysts nowadays. In this work, Co 9 S 8 /Cd 0.5 Zn 0.5 S (CS/CZS) heterojunction photocatalysts were prepared by the hydrothermal method, and their photocatalytic activity was evaluated by the degradation of rhodamine B (RhB) under visible-light irradiation. Compared with pristine Co 9 S 8 and Cd 0.5 Zn 0.5 S, CS/CZS heterojunction materials demonstrated better photocatalytic activity. The optimized CS/CZS-2 sample achieved 94% degradation efficiency of RhB under visible-light irradiation within 18 min. Active species trapping experiments revealed that ·O 2 − and h + were the main active substances in the photocatalytic degradation process of RhB. The excellent photocatalytic degradation performance can be attributed to the formation of type-II heterojunction between Co 9 S 8 and Cd 0.5 Zn 0.5 S with intimate contact interface, which is conducive to the separation and migration of photogenerated carriers. This study introduces a promising strategy for the design and development of type-II heterojunction photocatalysts specifically aimed at wastewater purification.
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
Reaction Kinetics Mechanisms and Catalysis
·
2022
·Vol. 135
·期 2
·1099-1111
·
IF 1.843
Zhang Hewei,Duan Congcong,Xu Zhen,Yin Jiahang
Herein, the C 60 /Cd 0.5 Zn 0.5 S (C 60 /CZS) photocatalysts with excellent photocatalytic performance were prepared using facile one-pot hydrothermal method. The crystal structure, morphology, photoelectric performance and photocatalytic activity of the samples were characterized by XRD, XPS, UV–Vis and electrochemistry. The catalytic degradation of pollutants under the irradiation of visible light was simulated using Rhodamine B (Rh B). The content of C 60 was changed from 0.5 to 5 wt%, and the optimal value for the photocatalytic activity was determined to be 2 wt%. The apparent degradation rate and degradation efficiency of Rh B were 0.024 min −1 and 97.5% within 140 min, which is 3.4 times that of pure CZS. C 60 /CZS exhibited excellent catalytic performance, and its photocatalytic activity was sustained even after three cycles. Moreover, electrochemical test results demonstrated that the separation and transfer of photocarriers on CZS surface were effectively improved by C 60 , thus enhancing its activity. In this study, we innovatively prepared a novel photocatalyst by combining fullerenes with sulfide solid solution for the first time, which has rarely been studied in the past. The synthetic method is simple, efficient and pollution-free. Subsequently, the catalytic degradation of Rh B experiment confirmed that the catalyst has high catalytic efficiency and stability. This experiment has practical significance not only for the catalytic degradation of Rh B but also for the application of fullerene in photocatalysis.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 8
·e202405010
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IF 2
Yujun Liu,Meng Lan,Xiaoli Dong,Nan Zheng,Jialin Gou
Graphical A novel type II CoWO 4 /Cd 0.5 Zn 0.5 S heterostructure photocatalyst is constructed by a simple secondary hydrothermal method and applied for the efficient photodegradation of rhodamine B (RhB) and methyl orange (MO) under visible light irradiation. The expansion of visible light absorption and dense interfacial contact contributes to the excellent photodegradation activity toward RhB and MO. The ecosystems and human health have been gravely impacted by growing organic pollutants and photocatalysis and is regarded as one of the most valid and green governance approaches. Herein, a novel type II CoWO 4 /Cd 0.5 Zn 0.5 S (CWO/CZS) heterojunction photocatalyst was constructed by a secondary hydrothermal method and applied to the photodegradation of rhodamine B (RhB) and methyl orange (MO). The experimental results show that the CWO/CZS heterojunction photocatalyst exhibits excellent photodegradation activity toward RhB and MO under visible light irradiation. CWO/CZS (0.10:1) achieved a degradation efficiency of 96.7% for RhB within 15 min and the apparent rate constants were 135 and 5 times of CWO and CZS, respectively. The high photodegradation rate of MO also demonstrates its excellent photocatalytic activity. The significant improvement in the photocatalytic degradation rate originated from the expansion of visible light absorption and dense interfacial contact between the nanoparticles, which could effectively accelerate the transfer of photogenerated charges. This work demonstrates a novel type II heterojunction photocatalyst for the effective removal of organic dyes, providing fresh ideas for wastewater purification.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2021
·Vol. 5
·期 22
·5814-5824
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IF 6.367
Ping Mu,Man Zhou,Kai Yang,Chensheng Zhou,Yuan Mi,Zhenzhen Yu,Kangqiang Lu,Zhengquan Li,Shaobo Ouyang,Weiya Huang,Changlin Yu
Using ion doping to engineer sulfur vacancies over metal sulfides is an effective method to improve photocatalytic properties, such vacancies form the center of the electron-captured state to promote the separation and transfer of photogenerated carriers. In this research, Yb/Er co-doped bulk Cd0.5Zn0.5S (CZS) was fabricated by a one-step simple hydrothermal process, and used for evaluating the catalytic activity for aquatic hydrogen production under visible light irradiation. The results showed that the Cd0.5Zn0.5S:Yb(15%), Er obtained exhibited a higher efficient photocatalytic activity of hydrogen evolution, in which the efficiency of Cd0.5Zn0.5S:Yb(15%), Er (422.0 μmol g−1 h−1) was 2.7 times higher than that of bare Cd0.5Zn0.5S (154.7 μmol g−1 h−1). This can be attributed to the augmented active surface area, the broadened spectral absorption of visible light and the facilitation of the separated efficiency of the photogenerated carriers. This finding provides a simple way to activate the metal-chalcogenides with S-vacancies for optimizing the photocatalytic performance.
研究领域:
材料科学
·
能源化学
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产品关联
DOI
高影响因子
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
·
2019
·Vol. 19
·期 1
·80-87
·
IF 2.408
Tingting Wei,Zhanbin Jin,Fengyan Li,Dandan Yan,Lin Xu
In this work, a series of samples of Cd0.5Zn0.5S (ZCS) nanoparticles decorated with porous TaON were successfully prepared as a direct Z-scheme system. The photocatalytic evolution of H2 with a high efficiency was explored using NiS decorated with TaON sensitized ZCS nanocomposites (NiS-TaON/ZCS) and Na2SO3/Na2S as sacrificial reagents. The results showed that 0.5 wt% NiS deposited on the surface of 4 wt% TaON-ZCS nanocomposites could reach the highest photocatalytic H2 evolution rate of 34.8 mmol h−1 g−1 with a maximum quantum yield of about 25.5% under 420 nm monochromatic light. The activity of the TaON-ZCS photocatalyst for photocatalytic H2 evolution is higher than that of either pure ZCS or TaON. This high photocatalytic performance is ascribed firstly to the hierarchical structure of the coupled semiconductor system and secondly to the efficient transfer and separation of photogenerated charge carriers with NiS as a cocatalyst, which could serve as an electron collector.
研究领域:
材料科学
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能源科学
·
化学工程
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2023
·
IF 4.6
Meng Lan,Hanbing Jia,Xiaoli Dong,Nan Zheng,Xue Li,Yu Wang,Helezi Zhou
The development of highly competent and economical photocatalysts for competent erasure of heavy metal pollutants in water is of momentous import but still a significant challenge. Herein, 3D/0D SnIn 4 S 8 /Cd 0.5 Zn 0.5 S heterostructure photocatalyst was resoundingly fabricated through integrating Cd 0.5 Zn 0.5 S nanoparticles on the surface of SnIn 4 S 8 microsphere via a simple solvothermal method and applied to high efficiency photoreduction Cr(VI). The fabricated SnIn 4 S 8 /Cd 0.5 Zn 0.5 S with optimized composition ratio achieves the exceptional reduction Cr(VI) property and the photoreduction efficiency of 20 % SnIn 4 S 8 /Cd 0.5 Zn 0.5 S can reach 91.1 % within 30 min visible light illumination. The prominent photocatalytic efficiency comes from the intimate contact of heterostructure interface, which effectively expedites the separation and migration of carrier and inhibits the photocorrosion of photocatalyst. This work provides a promising photocatalyst for water environment remediation, and promotes the exploration of heterostructure photocatalyst for wastewater purification.
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 Materials Today
·
2020
·
IF 8.352
Gongchang Zeng,Ying Cao,Yixiao Wu,Haiguang Yuan,Biaojun Zhang,Yanling Wang,Heping Zeng,Shaobin Huang
Photocatalytic hydrogen evolution is a developing technology that addresses the urgent energy shortage, without greenhouse gas emissions. Despite tremendous efforts over the past decades, the achievement of high-efficiency hydrogen evolution rates for application in semiconductors remains very challenging because of various factors, which include low charge mobility, low light absorption, and high charge carrier recombination. Nowadays, the built-in electric field of metal-semiconductor Schottky junctions exhibits significant developments to overcome the aforementioned limitations because of the enhanced charge separation and transportation efficiency. However, noble metals are scarce and unaffordable to limit the applications. As a promising alternative, the Ti 3 C 2 nanosheets showed excellent metal conductivity which is fascinating. A new Cd 0.5 Zn 0.5 S/Ti 3 C 2 composite was fabricated as a non-noble metal-based Schottky junction photocatalyst with enhanced H 2 production performance. For a practical exploration, this study expands its application in the realistic environment of natural seawater, which is not only more in line with the sustainable concept but also greatly alleviates the issue of limited freshwater. At present, due to the complex composition of seawater, only a few studies focus on the H 2 production of seawater. Remarkably, based on the rational design of the Cd 0.5 Zn 0.5 S/Ti 3 C 2 Schottky catalyst, the observed H 2 production rate of 9.071 mmol g −1 h −1 is thirty-three times higher than that of traditional Pt assisted photocatalyst in seawater.
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Mei Dong,Wenjun Li,Liang Geng,Ruixue Huang,Yuan Liu,Hongli Han
Herein, CuCo 2 O 4 hollow porous nanospheres (HPN), nanosheets (NS), and nanowires (NW) were synthesized via solvothermal and calcination processes, and were used to construct efficient heterojunctions with Cd 0.5 Zn 0.5 S. Interestingly, the unique hollow porous structure exhibits enhanced light absorption, large pore diameter (12.57 nm), and strong hydrophilicity (10.05°). Photocatalytic results indicate that CuCo 2 O 4 HPN/Cd 0.5 Zn 0.5 S achieves the optimal hydrogen production rate, which is 5.4, 1.2, and 1.3 times than that of pure Cd 0.5 Zn 0.5 S, CuCo 2 O 4 NW/Cd 0.5 Zn 0.5 S and CuCo 2 O 4 NS/Cd 0.5 Zn 0.5 S, respectively. High-resolution TEM and theoretical calculations confirm that (311)/(111) facet junctions in CuCo 2 O 4 nanospheres form a work function difference (0.24 eV), which significantly facilitates charge transfer and separation. Mott-Schottky and Ultraviolet photoelectron spectroscopy analyses indicate that p-type CuCo 2 O 4 and n-type Cd 0.5 Zn 0.5 S have staggered energy levels and a distinct Fermi level difference (1.85 eV), which leads to rearrangement of the Fermi energy level and modulation of charge transfer pathway. The resulting energy band bending and built-in electric field promote charge transfer at the heterojunction interface more effectively. The synergistic mechanism of the facet junction and p-n junction finally achieves high-efficiency hydrogen production. This work provides new insights into how to construct efficient p-n heterojunction photocatalysts and presents the synergistic mechanism of facet junction and p-n junction.
研究领域:
材料科学
·
能源科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2018
·
IF 4.841
Yuanyuan Liu,Cui Du,Chen Zhou,Shengyang Yang
The hierarchical AuNPs/Cd 0.5 Zn 0.5 S hybrids are directly fabricated via a facile one-step in-situ hydrothermal method. The as-prepared AuNPs/Cd 0.5 Zn 0.5 S hybrids demonstrate superior photocatalytic performance toward hydrogen production under visible light irradiation. The hydrogen evolution rate of the 5 wt% AuNPs/Cd 0.5 Zn 0.5 S synthesized with in-situ hydrothermal method can be 7.1 times greater than that of pure Cd 0.5 Zn 0.5 S and as much as 2.5 times of 5 wt% AuNPs loaded Cd 0.5 Zn 0.5 S synthesized with photodeposition method. Systematical investigations reveal that the enhanced photocatalytic performance of the one-step in-situ prepared AuNPs/Zn 0.5 Cd 0.5 S can be attributed to the inherent SPR effect and favorable electron transfer properties of AuNPs, as well as the rational hierarchical nanoarchitectures that allow AuNPs to be uniformly incorporated into Zn 0.5 Cd 0.5 S matrix. This one-step in-situ fabrication method provides a simple and efficient route to synthesize well-defined heterocatalysts.
研究领域:
材料科学
·
能源科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）