Inorganic Chemistry Frontiers
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2025
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IF 6.4
Xiaoying Bo,Caijie Yang,Bolun Li,Yikang Fan,Jiaoyan Li,Hengming Huang,Jiahui Kou,Chunhua Lu
The photocatalytic O2 reduction to produce H2O2 offers significant environmental benefits. However, its efficiency is hindered by rapid charge recombination and sluggish catalytic kinetics in the catalyst. Traditional elemental doping has been employed to mitigate these issues, but its efficacy is limited as heteroatoms within the bulk often trap charge carriers. To address these challenges, we propose a gradient doping strategy. Unlike uniform doping, gradient doping introduces additional active sites on the catalyst surface. Our engineered gradient Mn-doped CdS photocatalyst demonstrated a remarkable H2O2 generation rate of 1874 μmol g−1 h−1, with an apparent quantum efficiency of 65.2% at 475 nm. The gradient distribution of Mn creates reverse quantum wells within the CdS matrix, which significantly enhances charge extraction from the bulk to the surface. The surface enrichment of Mn not only facilitates the adsorption and activation of O2 but also promotes the formation of the crucial *OOH intermediate, thereby accelerating H2O2 production.
研究领域:
材料科学
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环境科学
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催化化学
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DOI
高影响因子
CHEMICAL PHYSICS LETTERS
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2022
·
IF 2.719
Jie Xu,Feng Lin,Jingyu Wang,Yujie Wang
Photocatalytic cleavage of lignin C O bonds is a promising way to depolymerize lignin into aromatic value-added chemicals. However, the dispersibility of lignin in solvents and photocatalytic efficiency still face great challenges. Here, a micelle aqueous medium (CTAB-15) composed of hexadecyl trimethyl ammonium bromide and water was successfully prepared. 2-phenoxy-1-phenylethanol (lignin model compounds, PPol) and dioxanesolv poplar lignin have a good dispersion in CTAB-15. Compared to the previous reports, the highest photocatalytic efficiency can be obtained under optimal conditions by using the photocatalyst CdS. The main products formed by photocatalytic cleavage of lignin C O bonds are phenols and ketones. Mechanism studies show that CTAB-15 can provide sufficient hydrogen by photo-driven dissociation of water for photocatalytic cleavage of lignin C O bonds, which is critical to rapidly improving photocatalytic efficiency. The hydrogen, which is used to form acetophenone, comes from H 2 O and PPol. However, the hydrogen needed to form phenol comes only from PPol itself. In addition, the photocatalytic reaction follows a photogenerated electron-hole coupled redox process. This work develops a new direction for promoting the high-value utilization of lignin.
研究领域:
化学工程
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可再生资源利用
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DOI
高影响因子
RSC Advances
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2014
·Vol. 4
·期 69
·36665-36670
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IF 3.708
Juan Feng,Junxue Liu,Guijuan Wei,Jun Zhang,Shutao Wang,Zhaojie Wang,Changhua An
Hollow CdS nanostructures have been synthesized by a two-step ionic exchange route, which consists of a first synthesis of Ag2S intermediated hollow frames derived from the reaction of S2− ions with AgCl cube-tetrapods, and a subsequent ion-exchange conversion of the obtained Ag2S to CdS hollow nanoframes. The investigation of the corresponding transformation process with scanning electronic microscopy (SEM) revealed that the obtained CdS particles preserved the framework of the original template. The solar-driven hollow structured CdS modified with 5% (w/w) of promoter of Pt nanoparticles/nanoclusters manifested a high hydrogen evolution rate of 10.07 mmol h−1 g−1, corresponding to the apparent quantum yield of 9.6% measured at a single length of 435 nm, which is due to efficient charge separation, fast transport of the photogenerated carriers, and fast photochemical reaction at the CdS/Pt/electrolyte interfaces. The present work can benefit the development of other hollow structured nano-photocatalysts with high efficiency towards new energy applications.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
JOURNAL OF CATALYSIS
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2018
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IF 6.759
Wenlong Zhen,Xiaofeng Ning,Meng Wang,Yuqi Wu,Gongxuan Lu
CdS is a promising visible-light responsive photocatalyst. However, the serious photocorrosion limits its application in photocatalysis. Here we report a novel strategy to overcome the disadvantage of CdS photocorrosion by fabricating peroxide decomposing active MnO 2 thin-layer over CdS nanowires (NWs) and assembling oxygen separation artificial gill to remove nascent formed oxygen in the dispersion. In the meantime, the using non-noble metal NiSe quantum dots (QDs) co-catalyst, NiSe/MnO 2 -CdS photocatalysts shows excellent photocatalytic over-all water splitting activity and remarkable stability under visible light irradiation without addition of any sacrifice reagent, 455.0 µmol h −1 g −1 of hydrogen evolution reaction (HER) rate and 5.20% of apparent quantum efficiency (AQEs) at 430 nm. Removing nascent formed O 2 from water by artificial gill can prevent the oxygen leading CdS photocorrosion. Photoluminescence spectra and photoelectrochemical measurements indicate that loading NiSe QDs and coating MnO 2 thin-layer can also improve transfer of the photogenerated charges in CdS. MnO 2 thin-layer can decompose formed hydrogen peroxide and enhance water splitting. Our results could potentially provide a new method for designing and fabricating more stable and efficient CdS-based nanocomposite photocatalysts toward versatile solar energy conversion.
研究领域:
材料科学
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光催化
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能源转换
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DOI
高影响因子
ACS Applied Materials & Interfaces
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2020
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IF 8.758
Yi Zhao,Yongfeng Lu,Lu Chen,Xiaofeng Wei,Jiefang Zhu,Yuanhui Zheng
Cadmium sulfide (CdS) as one of the most common visible-light-responsive photocatalysts has been widely investigated for hydrogen generation. However, its low solar–hydrogen conversion efficiency caused by fast carrier recombination and poor catalytic activity hinders its practical applications. To address this issue, we develop a novel and highly efficient nickel–cobalt phosphide and phosphate cocatalyst-modified CdS (NiCoP/CdS/NiCoPi) photocatalyst for hydrogen evolution. The dual-cocatalysts were simultaneously deposited on CdS during one phosphating step by using sodium hypophosphate as the phosphorus source. After the loading of the dual-cocatalysts, the photocurrent of CdS significantly increased, while its electrical impedance and photoluminescence emission dramatically decreased, which indicates the enhancement of charge carrier separation. It was proposed that the NiCoP cocatalyst accepts electrons and promotes hydrogen evolution, while the NiCoPi cocatalyst donates electrons and accelerates the oxidation of sacrificial agents (e.g., lactic acid). Consequently, the visible-light-driven hydrogen evolution of this composite photocatalyst greatly improved. The dual-cocatalyst-modified CdS with a loading content of 5 mol % showed a high hydrogen evolution rate of 80.8 mmol·g–1·h–1, which was 202 times higher than that of bare CdS (0.4 mmol·g–1·h–1). This is the highest enhancement factor for metal phosphide-modified CdS photocatalysts. It also exhibited remarkable stability in a continuous photocatalytic test with a total reaction time of 24 h.
研究领域:
材料科学
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催化化学
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DOI
PubMed
高影响因子
RSC Advances
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2018
·Vol. 8
·期 21
·11489-11497
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IF 2.936
Hui Li,Lihua Liu,Ziqun Wang,Xiuzhen Zheng,Sugang Meng,Shifu Chen,Xianliang Fu
Although the CdS photocatalyst has been extensively investigated, a rational hydrothermal synthesis route is still required to prepare highly active CdS for H2 evolution reaction (HER). To optimize the precursor of the sulfur source, three prevalent organic sulfur sources of thiourea (TA), thioacetamide (TAA) and L-cysteine (L-Cys) were used for hydrothermal synthesis of CdS. Their effects on the crystallographic structure, morphology, optical property, band structure, and photocatalytic HER performance of the products were then investigated systematically. The results indicated that hexagonal branched dendritic structure CdS (S-TA) could be produced in TA solution and showed the highest HER activity due to the branched 1D structure, the smallest interfacial electron transfer resistance and the most negative conduction band bottom (Ecb). Whereas in TAA, spherical CdS (S-TAA) with a mixed phase of hexagonal and cubic was obtained. The mixed phase structure and the more positive Ecb of S-TAA lead to a considerably lower HER activity than that of S-TA. Poorly crystallized hexagonal CdS nanoparticles (S-Cys) were prepared in L-Cys and showed the lowest HER performance as its Ecb is very near to H+ reduction potential. Thus, compared to T-AA and L-Cys, TA is a more suitable sulfur source for hydrothermal preparation of highly active CdS for HER.
研究领域:
材料科学
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能源化学
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2021
·Vol. 56
·期 14
·8643-8657
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IF 4.22
Ma Ligang,Ai Xiaoqian,Yang Xingming,Cao Xiaoxiao,Han Dianrong,Song Xiang,Jiang Huilin,Yang Wei,Yan Senlin,Wu Xiaoshan
CdS with band gaps of 2.4 eV is an essential semiconductor for optoelectronic and photocatalytic devices. In this study, Cd(II)-based metal–organic framework (MOF)-derived CdS photocatalysts are successfully synthesized using a facile chemical bath deposition method. CdS precursors are derived from Cd-based MOFs that H 2 S gas was bubbled into as S source. Four kinds of CdS nano-photocatalyst are obtained through controlling the thermal annealing process of CdS precursors. The excellent photocatalytic performance of CdS and the benefits of the porous and molecular sieving properties of MOFs are well integrated. The evolution of the morphology, microstructure, and optical properties are investigated by various characterization methods. The results indicate that the sample with an annealing temperature of 500 °C is primarily nanosheet structures with sizes ranging from 20 to 30 nm, which construct a porous network structure, Moreover, the best photodegradation activity is obtained by illuminating the catalyst in rhodamine-B dye solution for 80 min and reducing the absorption intensity to nearly zero. Finally, the pollutant degradation mechanism was analyzed in detail.
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
GREEN CHEMISTRY
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2016
·Vol. 18
·期 12
·3628-3639
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IF 8.506
Xiaofeng Ning,Sugang Meng,Xianliang Fu,Xiangju Ye,Shifu Chen
In this study, a nanoparticle structure of CdS with cubic phase (CdS-G) was prepared by a facile solid-state reaction at room temperature for the first time. CdS-G can be used as a highly active photocatalyst for selective oxidation of p-methoxybenzyl alcohol (pMBA) to p-methoxybenzaldehyde (pMBAD) and reduction of nitrobenzene (NB) to aniline (AL) in a coupled reaction system under green mild reaction conditions through visible light irradiation. Compared with the counterparts prepared by the conventional precipitation method (CdS-P) and hydrothermal method (CdS-H), the photocatalytic performance of CdS-G is greatly improved owing to the unique features of the nanostructure, the high surface area, pore volume, visible light absorption and photoelectric properties. The yield of pMBAD (AL) over CdS-G is about 1.6 (5.2) and 1.9 (20.8) times higher than that over CdS-P and CdS-H, respectively. The CdS-G sample exhibits excellent selectivity and stability because its valence band (VB) and conduction band (CB) positions matched well with the redox potentials of pMBA/pMBAD and NB/AL. Furthermore, the photogenerated holes and electrons can be efficiently and directly reacted with pMBA and NB, respectively. The photocatalytic selective oxidation and reduction reaction is a synergistic reaction via producing and consuming protons. The photogenerated holes and electrons could be utilized thoroughly to produce pMBAD and AL, respectively. The molar ratio of pMBA and NB was 3 : 1, and the yield of pMBAD and AL could be successfully achieved at a theoretical ratio of 1 : 1. This work highlights the promising scope for selective organic synthesis in one reaction system under mild conditions using photogenerated electrons and holes directly and simultaneously.
研究领域:
化学
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材料科学
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环境科学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Kailu Li,Hui Pan,Fang Wang,Zhengguo Zhang,Shixiong Min
Herein, a NiS nanoparticle-socketed CdS photocatalyst (NiS/CdS- e ) is developed by hydrothermal sulfurization of Ni-doped Cd(OH) 2 precursor, where the Cd(OH) 2 particles are converted into CdS while the doped Ni species are exsolved and socketed on the surfaces of CdS. 2% NiS/CdS- e presents a high H 2 evolution rate of 18.9 mmol g −1 h −1 with an apparent quantum efficiency (AQE) of 13.9% at 420 nm, much superior to those of pristine CdS (0.5 mmol g −1 h −1 ) and 2% NiS/CdS- h (9.9 mmol g −1 h −1 ) prepared by impregnation-hydrothermal sulfurization. The enhanced activity originates from the strongly coupled interface between exsolved NiS and CdS that efficiently promote the charge separation, while the exsolved NiS nanoparticles serve as highly active H 2 evolution sites. Moreover, the strongly coupled interfaces enable improved H 2 evolution stability for 2% NiS/CdS- e over a 30-h cycling reaction. This work provides an effective strategy toward strongly coupled cocatalyst/semiconductor photocatalysts for efficient solar energy conversion.
研究领域:
材料科学
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催化化学
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能源转换
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产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
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2022
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IF 8.047
Wenhao Li,De-Kun Ma,Xia Hu,Faliang Gou,Xiaogang Yang,Walker MacSwain,ChenZe Qi,Weiwei Zheng
Rationally designing and controlling the interactions between reaction intermediates and the surface of photocatalysts is critical to obtain high product selectivity in photocatalysis. Herein, using CdS-based photocatalytic CO 2 reduction reaction (CO 2 RR) as a model system, we demonstrate that CH 4 selectivity can be significantly enhanced through the introduction of La 3+ ions with high oxophilicity on the surface of the photocatalysts. The high surface oxophilicity of the photocatalysts can increase CO* desorption energy and promote further hydrogenation to CH 4 . In contrast, when Au 3+ ions with low oxophilicity were doped in CdS, reduced CH 4 selectivity was observed in the CO 2 RR. Significantly, enhanced CH 4 selectivity can be achieved by doping oxophilic La 3+ ions into a broad range of alternative photocatalysts including ZnO, SnS 2 , BiOBr, BiVO 4 , TaON, and CsPbBr 3 , which demonstrates the general strategy to enhance CH 4 selectivity of photocatalytic CO 2 RR through increased surface oxophilicity of the photocatalysts by rare earth La 3+ ion doping.
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
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2013
·Vol. 15
·期 44
·19422-19426
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IF 3.829
Weiming Wu,Rui Lin,Lijuan Shen,Ruowen Liang,Rusheng Yuan,Ling Wu
CdS photocatalysts with tunable band gaps (2.17–2.32 eV) were successfully prepared by a solvothermal method. Photocatalytic hydrogenation of 4-nitroaniline over the obtained samples was evaluated in the presence of HCO2NH4 as a hole scavenger upon purging with N2 under visible light irradiation (λ ≥ 420 nm). The CdS sample prepared by CdCl2 and sulfur powder in ethylenediamine showed excellent catalytic activity, giving 100% of 4-nitroaniline conversion and 95% of p-phenylenediamine selectivity after 35 min of visible light irradiation. The results of electron spin resonance revealed that its photoexcited holes could efficiently react with HCO2− ions within HCO2NH4 molecules to produce ˙CO2− radicals with strong reductive abilities. Furthermore, photoexcited electrons of the obtained sample exhibited relatively strong reductive abilities as compared to other CdS samples. Therefore, this sample showed the highest catalytic activity among the CdS samples for the photocatalytic hydrogenation of 4-nitroaniline.
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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DOI
高影响因子
GREEN CHEMISTRY
·
2012
·Vol. 14
·期 6
·1705-1709
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IF 6.32
Weiming Wu,Guodong Liu,Quanhua Xie,Shijing Liang,Huarong Zheng,Rusheng Yuan,Wenyue Su,Ling Wu
Highly efficient photocatalytic reduction of 4-nitroaniline to p-phenylenediamine over a commercial CdS photocatalyst was observed under visible light irradiation (λ ≥ 420 nm) in water. The conversion of 4-nitroaniline and the selectivity of p-phenylenediamine were ∼100% and ∼98% after 9 min of visible light irradiation, respectively. The photoreduction efficiency of 4-nitroaniline over the CdS photocatalyst remained above 95% in the 5th cycle of testing. Its photocatalytic activity was much higher than those of nitrogen-doped TiO2 and commercial TiO2 photocatalysts. Further experimental results revealed that the ammonium formate and N2 atmosphere were indispensable for the photocatalytic reduction of 4-nitroaniline over the CdS photocatalyst. On the basis of the results of electron spin resonance, photoexcited electrons and ·CO2− radicals were detected in the present system. These species had strong reductive powers, and were therefore able to efficiently reduce 4-nitroaniline to p-phenylenediamine.
研究领域:
化学工程
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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
危险品化学品经营许可证（带存储）