Solar RRL
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2020
·Vol. 5
·期 6
·2000427
·
IF 7.527
Yiqun Li,Shipeng Wan,Cheng Lin,Yujie Gao,Yuan Lu,Luyang Wang,Kan Zhang
Sufficiently utilizing photogenerated electron/hole pairs for a coupled redox enables green, sustainable, and low-cost photocatalysis. Herein, a series of MoS 2 /Cd x Zn 1− x S photocatalysts with uniform 2D/2D structure are reported for solar water–reductive H 2 products coupled with the degradation of polyethylene terephthalate (PET) plastic. The MoS 2 /Cd 0.5 Zn 0.5 S heterojunction with a loading mass of 4.3 wt% MoS 2 exhibits the best H 2 evolution rate of 15.90 mmol g −1 h −1 in an aqueous solution due to its appropriate redox ability, great light absorption, and carrier separation abilities. Then, the oxidation products of PET are analyzed by 1 H-NMR spectroscopy, which demonstrates the PET being efficiently degraded to molecule compounds, such as formate and acetate. The work provides a feasible solution to the problem of plastic pollution and meets the demand for sustainable clean energy simultaneously.
研究领域:
材料科学
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环境科学
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能源科学
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化学
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高影响因子
JOURNAL OF MATERIALS RESEARCH
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2019
·Vol. 34
·期 10
·1773-1784
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IF 1.982
Feihu Mu,Shijian Zhou,Yun Wang,Jian Wang,Yan Kong
A bimetallic metal–organic frameworks (MOFs)-templated strategy was developed to fabricate mesoporous CdxZn1−xS polyhedrons with improved photocatalytic hydrogen evolution activity, and the formation mechanism of these mesoporous polyhedrons was discussed in detail. Incorporating Cd atoms, the Brunauer–Emmett–Teller surface areas of mesoporous CdxZn1−xS polyhedrons were significantly increased (271 m2/g), providing more exposed active sites compared with ZnS. In addition, suitable conduction band potential (< −0.55 eV) of the mesoporous CdxZn1−xS polyhedrons was also beneficial for the photocatalysis. Impressively, by the co-effects of mesoporous structure and modified conduction band, the mesoporous CdxZn1−xS polyhedrons exhibited better photocatalytic activity for hydrogen evolution than most reported photocatalysts without noble metals. The maximum hydrogen evolution rate of the CSZ3 reached 4.10 mmol/(h g) under visible-light irradiation and without any cocatalyst condition. This facile strategy for the construction of mesoporous CdxZn1−xS polyhedrons provided a deep insight to fabricate other metal sulfides for a variety of photochemical applications.
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高影响因子
Nanoscale
·
2019
·Vol. 11
·期 12
·5571-5579
·
IF 6.97
Shuangshuang Kai,Baojuan Xi,Denghu Wei,Shenglin Xiong
It is well known that efficient charge separation is a crucial factor for the enhancement of photocatalytic activity for hydrogen evolution, and the internal electric field is commonly designed to improve charge separation. The microstructure of a catalyst has a significant effect on the photocatalytic and photoelectrochemical (PEC) performance. Herein, two samples are engineered with similar morphology but different crystal structures. Small wurtzite (WZ)/zinc blende (ZB) -Cd0.6Zn0.4S nanorods are featured with dense type-II homojunctions. By utilizing the excellent thermal conductivity of graphene to eliminate thermal fluctuations, WZ-Cd0.6Zn0.4S/RGO is obtained by anchoring Cd0.6Zn0.4S nanorods on the graphene sheets. The elongated WZ/ZB-Cd0.6Zn0.4S nanorods with an internal electric field formed by the heterophase homojunction greatly improve the photocatalytic hydrogen production rate to 36.33 mmol h−1 g−1, much higher than that of WZ-Cd0.6Zn0.4S-RGO. On the contrary, WZ-Cd0.6Zn0.4S/RGO shows superior photoelectrochemical performance under an external electric field, benefiting from the excellent electric conduction and the 2D network of RGO as electron transportation channels. The study strategy and synthetic route for the Cd0.6Zn0.4S nanorods with a homojunction and a homogenous structure in our work may open up new avenues for the fabrication of other semiconductor materials with distinctive photocatalytic and PEC applications.
研究领域:
材料科学
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能源科学
·
纳米技术
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Huansheng Liu,Hanhan Lv,Chihao Lu,Yi Zhang,Daniel K. Macharia,Zheng Tang,Zhigang Chen
Traditional photocatalysts are usually prepared in first-pot and then dried, and re-dispersed in the second-pot for photocatalytic H 2 generation, where the two-pot mode may lead to loss/underutilization of active sites. To maximize active sites, herein we propose in-situ synthesis and photocatalytic hydrogen (H 2 ) evolution in one-pot mode. NiS x -modified Cd x Zn 1-x S (NiS x -CZS) photocatalysts as a model are prepared by photochemical reactions of metal salt precursors in the presence of sulfur. Among NiS x -CZS photocatalysts, 2 wt% NiS x -CZS exhibits the strongest photoabsorption in the visible region and the highest photocurrent response, implying that it produces the most photoexcited electrons under visible light irradiation. When irradiated by visible light (≥ 420 nm), the in situ H 2 generation rate of optimized 2 wt% NiS x -CZS with higher concentration of active sites is 17.98 mmol g -1 h -1 (one-pot mode), which is better than the two-pot mode (15.08 mmol g -1 h -1 ). Besides, the presence of in situ attached NiS x co-catalyst on CZS host results in a 22.2-fold H 2 production rate compared to pristine CZS. H 2 production performance with NiS x co-catalyst (89.92 mmol g -1 ) within 5 h is also better than noble/transitional metals as co-catalysts (9.62-26.99 mmol g -1 ). The amorphous NiS x provide sufficient unsaturated edge sulfur (S) sites, which serve as active centers to capture and enrich H + and lead to the expedited H 2 generation through the effective combination of H ads atoms. This work provides a unique insight into the one-pot photochemical synthesis of photocatalysts with charge-accumulated active sites and a rational strategy for in situ hydrogen production.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
NANO
·
2018
·
IF 1.1
Shipeng Yang,Siwei Peng,Chunhui Zhang,Xuwen He,Yaqi Cai
Nanoparticles of the semiconductor catalyst Cd x Zn 1 − x S were embedded into the metal organic framework MIL-101(Cr) to obtain Cd x Zn 1 − x S@MIL-101(Cr) nanocomposites. These materials not only possess high surface areas and mesopores but also show good utilization of light energy. The ultraviolet-visible diffuse reflectance patterns of Cd x Zn 1 − x S@MIL-101(Cr) nanocomposites showed that Cd 0 . 8 Zn 0 . 2 S@MIL-101(Cr) possessed good visible light response ability among the synthesized nanocomposites. The photocatalytic performance of the Cd x Zn 1 − x S@MIL-101(Cr) nanocomposites were tested via degradation and mineralization of methylene blue in neutral water solution under light irradiation using a 300W xenon lamp. As a result, using Cd 0 . 8 Zn 0 . 2 S@MIL-101(Cr) as a catalyst, 99.2% of methylene blue was mineralized within 30 min. Due to the synergistic effect of adsorption by the MIL-101(Cr) component and photocatalytic degradation provided by the Cd 0 . 8 Zn 0 . 2 S component, the Cd 0 . 8 Zn 0 . 2 S@MIL-101(Cr) catalyst displayed superior photocatalytic performance relative to Cd 0 . 8 Zn 0 . 2 S and MIL-101(Cr). Furthermore, Cd 0 . 8 Zn 0 . 2 S@MIL-101(Cr) possessed excellent stability during photodegradation and exhibited good reusability. The remarkable photocatalytic performance of Cd 0 . 8 Zn 0 . 2 S@MIL-101(Cr) is likely due to the effective transfer of electrons and holes at the heterojunction interfaces.
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高影响因子
CATALYSIS LETTERS
·
2022
·Vol. 153
·期 10
·3074-3091
·
IF 2.936
Faizan Muhammad,Saeed Aamir,Song Piao,Zhang Ruirui,Liu Ruixia,Chang Zhi,Wu Liuzhu,Zhang Manyuan
Vanadium phosphorous oxide (VPO) catalysts have been recognized as heterogeneous catalyst for selective oxidation of low-carbon alkanes i.e., n -butane toward maleic anhydride. This process has widely gained attention globally due to its highly selective and cost-effective process. Herein, we employed Cd 0 . 2 Zn 0 . 8 S as a support for the VPO catalyst and evaluated its n -butane catalytic performance. Compared to the unpromoted catalyst (Blank-VPO), a higher n -butane conversion and MA yield were successfully obtained from the promoted catalyst (Cd 0 . 2 Zn 0 . 8 S@VPO). Interestingly, it reduces the byproducts, i.e., CO 2 and CO emission. Characterization methods such as TGA, XRD, EDS, SEM, FTIR, NH 3 -TPD, XPS, TEM, and Raman spectroscopy were used to characterize the Cd 0 . 2 Zn 0 . 8 S, VPO precursor and catalyst. Graphical Abstract
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高影响因子
Journal of Environmental Sciences
·
2026
·
IF 6.5
Mengqi Guo,Qing Xi,Jilong Qin,Jianxin Liu,Yawen Wang,Yunfang Wang,Houfen Li,Fangxia Xie,Caimei Fan,Rui Li,Jiancheng Wang
Photocatalytic hydrogen evolution coupled with selective benzyl alcohol oxidation offers a promising route for concurrent value-added chemical synthesis and clean energy production. However, the overall efficiency of this process is significantly limited by the inefficient generation and non-directional migration of photogenerated electron-hole pairs. To address these challenges, this study designed and constructed a novel Cd x Zn 1-x S catalyst via a one-step hydrothermal method for visible light-driven photocatalytic hydrogen evolution and benzyl alcohol oxidation, without the addition of a sacrificial agent. The effects of the Cd/Zn ratio on the catalyst’s band structure and the behavior of photogenerated electron-hole pairs were systematically investigated through experimental characterizations and density functional theory calculations. The results reveal that the introduction of bimetallic sites in the Cd x Zn 1-x S solid solution creates distinct electrophilic and nucleophilic regions. This unique electronic structure modulates the energy band structure, thereby extending the light absorption range and enhancing the generation of photogenerated charge carriers. More importantly, it facilitates the directional migration of photogenerated electrons and holes to their respective reaction sites, which reduces charge recombination and ensures efficient reaction completion. Thus, the optimized Cd x Zn 1-x S catalyst exhibited a high photocatalytic activity of H 2 (9.33 mmol/(g⋅h)) and benzaldehyde yield (10.01 mmol/(g⋅h)) under visible light irradiation. This work provides new insights for designing efficient dual-functional photocatalysts for sustainable energy conversion and organic synthesis.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Xiaohong Zhao,Jiantao Tong,Sai Bai,Jin Qian
This study presents a sludge-derived biochar (BC)-supported Cd-Zn bimetallic sulfide composite (Cd x Zn 1-x S@BC) as a novel dual-functional platform for robust peroxymonosulfate (PMS) activation. The composite material achieves electronic modulation through Zn-induced charge redistribution, which simultaneously accelerates direct electron transfer processes and enhances sulfur vacancy concentration to promote reactive oxygen species (ROS) generation. The biochar matrix further enhances pollutant enrichment and PMS adsorption energy through hierarchical pores while mediating electron shuttling between the catalyst and PMS. Simultaneously, a synergistic catalytic stabilization mechanism was revealed: Zn promotes bimetallic valence cycling to prevent cadmium over-oxidation while simultaneously enhancing metal surface passivation, achieving a 62.8 % reduction in Cd leaching. Optimized Cd x Zn 1-x S@BC (Cd/Zn = 0.5:0.5) exhibits exceptional performance, degrading 92 % of tetracycline (TC) within 30 min. It demonstrates pH tolerance (3–11), anti-interference against coexisting ions, and retains > 85 % efficiency in real wastewater matrices. This work establishes a dual-engineering strategy coupling bimetallic synergy and biochar integration for adaptive oxidation systems in water remediation.
研究领域:
环境科学
·
材料工程
·
催化化学
·
水处理技术
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纳米技术
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Qi Li,Shengchao Yang,Yufan Huang,Yuwei Liang,Chunling Hu,Min Wang,Zhiyong Liu,Yanlong Tai,Jichang Liu,Yongsheng Li
The difficulty in fabricating a multifaceted composite heterojunction system based on Cd x Zn 1- x S limits the enhancement of photocatalytic performance. In the present scrutiny, novel ZnO/Cd x Zn 1- x S/CdS composite heterojunctions are successfully prepared by the alkaline dissolution etching method. The internal electric field at the interface of I-type and Z-scheme heterojunction improved the effective charge separation. The ZC 8 sample exhibits excellent photocatalytic performance and the H 2 production efficiency is 15.67 mmol g −1 h −1 with good stability up to 82.9 % in 24-hour cycles. The performance of CH 4 and CO capacity in the CO 2 RR process is 3.47 μmol g −1 h −1 and 23.5 μmol g −1 h −1 , respectively. The photogenerated accelerated charge transport is then examined in detail by in situ X-ray photoelectron spectroscopy (ISXPS) and density functional theory (DFT) calculations. This work presents a new idea for the synthesis of Cd x Zn 1- x S solid-solution-based materials and provides a solid reference for the detailed mechanism regarding the electric field at the heterojunction interface.
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高影响因子
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