JOURNAL OF LUMINESCENCE
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2016
·
IF 2.693
Yanyan Chen,Jigang Min,Qiang Wang,Shenjie Li
Aqueous solution deposition of metal chalcogenide semiconductor thin films is considered a green and low-cost approach. So it is hard to find a general aqueous solution approach to deposit various kinds of high-quality metal sulfide quantum dots thin films . Here, we describe a green and robust aqueous solution approach, and five types of metal sulfide precursor solutions (Cu(CH 3 COO) 2 , AgNO 3 , Zn(CH 3 COO) 2 , Cd(CH 3 COO) 2 ·2H 2 O, Ni(CH 3 COO) 2 ·4H 2 O) can be prepared at room temperature under air atmosphere. By this green route, luminescent Ag-doped Zn x Cd 1− x S semiconductor films have been successfully synthesized via a facile and green method in the open air at 260 °C using precursors. NH 3 ·H 2 O (28–30%) were used as solvent, and 3-mercaptopropionic acid was used as the capping agents. As-prepared quantum dot thin films exhibit a tunable emission covering the whole visible light region. The absolute photoluminescence quantum yields can reach as high as 24.6%, which have a high potential application in luminescent, transparent, and conductive thin films.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2017
·
IF 9.446
Wan-Ni Wang,Chen-Xi Huang,Chen-Yang Zhang,Meng-Li Zhao,Jun Zhang,Hua-Jian Chen,Zheng-Bao Zha,Tingting Zhao,Hai-Sheng Qian
Photocatalysts driven by near infrared light (NIR) are of great importance for making full use of solar energy and wide applications in biomedicine, biosensor, photocatalysis, and etc. In this work, we demonstrate a facile template assisted hydrothermal approach to fabricate upconversion nanoparticles (UCNPs) and Zn x Cd 1-x S yolk-shell nanoparticles, although the yolk-shell nanoparticles were made from hexagonal phase of β-NaYF 4 (NaYF 4 :Yb/Tm@NaYF 4 :Yb/Er) and II–VI semiconductor materials with a large lattice mismatch of more than 10%. The growth mechanism of the formation of yolk-shell nanostructures has been extensive investigated and the shape evolution with the time has been demonstrated. Steady and dynamic fluorescence spectra show that the as-prepared yolk-shell nanoparticles of UCNPs/Zn x Cd 1-x S can be used as efficient nanotransducer for NIR light owing to enhanced energy transfer efficiency. Interesting, the as-prepared yolk-shell nanoparticles exhibit excellent photocatalytic performance on degradation towards RhB dyes, excellent biocompatible properties and high production ability for hydroxyl radical ( OH) and single oxygen ( 1 O 2 ), which might be employed to wide applications in solar cell, hydrogen production, and photodynamic therapy related nano-biotechnology.
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2023
·
IF 5.7
Linjuan Wang,Mingpu Kou,Julie Tournet,Siva Karuturi,Ling Zan
Background Recognized for its high calorific value, clean and non-polluting properties, hydrogen is considered to be one of the most attractive solutions to the impending energy crisis. Photocatalytic water splitting has been widely investigated for its promise to produce hydrogen in a sustainable, environmentally friendly and low-cost approach. In pursuit of high photocatalytic efficiency, multiple strategies haven been explored such as doping, co-catalyst modification and heterojunction construction realizing promising improvements. Methods We synthesized CdS doped with Zn ions and modified with MoS 2 as co-catalyst to form Zn x Cd 1− x S solid solution and MoS 2 -Zn 0.25 Cd 0.75 S heterojunction using a simple one-step hydrothermal method. The synthesized catalyst was used water splitting under visible light irradiation. The structural and morphological characteristics of these materials, along with their photocatalytic mechanisms, were investigated using multiple techniques such as SEM, TEM, XPS, PL, etc. Findings The photocatalyst consisting of 0.9 wt.% MoS 2 -Zn 0.25 Cd 0.75 S achieved a production rate of 6276 μmol h −1 g −1 , which is 17.4 times higher than that of pure CdS and 1.6 times higher than that of Zn 0.25 Cd 0.75 S. The composite also demonstrated a high apparent quantum yield of 11.1 % at 420 nm. The mechanism of the water splitting process, revealed through various techniques, introduces novel pathways for crafting high-efficiency photocatalysts with an internal electron-hole separation heterostructure.
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高影响因子
Journal of Materials Chemistry C
·
2012
·Vol. 1
·期 4
·751-756
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IF 0
Yanyan Chen,Lijian Huang,Shenjie Li,Daocheng Pan
Water-soluble Cu+- and Ag+-doped ZnxCd1−xS quantum dots have been successfully synthesized via a facile and green method. All synthetic procedures were conducted in the open air at 95 °C. Hydrophilic glutathione was used as the capping agent. The influence of the dopant concentration in alloyed ZnxCd1−xS QDs has been investigated. The as-prepared Cu+- and Ag+-doped ZnxCd1−xS/ZnS core–shell quantum dots exhibit tunable emission covering the whole visible light region and the photoluminescence quantum yield (PL QY) can reach as high as 20% and 31%, respectively.
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RSC Advances
·
2015
·Vol. 5
·期 35
·27829-27836
·
IF 3.84
Anping Ma,Zhihong Tang,Shuling Shen,Linjie Zhi,Junhe Yang
Monodisperse and ultrafine ZnxCd1−xS (ZCS) nanorods with hexagonal phases were controllably synthesized by a facile one-pot approach. The band gap of these alloyed nanocrystals can be tuned in a broad range from 2.41 to 3.78 eV by simply changing the molar ratio of the two precursors. All the ZCS samples exhibit a band gap-related and aspect ratio-dependent photoresponse to visible light. Zn0.5Cd0.5S nanorods with a suitable band gap and aspect ratio display the highest photoresponse, even 25 times higher than that of Zn0.875Cd0.125S. Graphene was chosen as a co-catalyst for 1D Zn0.5Cd0.5S nanorods due to its 2D structure and excellent conductivity. The Zn0.5Cd0.5S/RGO nanocomposites with a RGO content of 2.0 wt% showed the highest photocatalytic activity for the degradation of methylene blue (MB), which is mainly due to the uniform dispersion of ZCS nanorods on RGO and the enhanced separation rate of photoinduced electrons and holes by fast transfer of the photogenerated electrons through the contact line-to-line interface between ZCS nanorods and RGO nanosheets.
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高影响因子
Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Ting-Ting Shen,Jing Liu,Fang-Yuan Bai,Wei-Wei Xu,Xue Yong,Zhi-Rong Li,Jing-Ru Han,Jun Chen,Heng Zhao,Zhi-Yi Hu,Yu Li,Bao-Lian Su
Biomass photoreforming to coproduce sustainable hydrogen and valuable chemicals is a potential strategy for alleviating energy and environmental issues. However, the lack of bifunctional catalysts to efficiently achieve the “one stone kills two birds” scenario greatly limits its practical application. Herein, we rationally design a three-dimensionally ordered macro-porous structure (3DOM) CaTiO3 (CTO) to address the mass diffusion and light harvesting and to load ZnxCd1-xS (ZxC1-xS) quantum dots (QDs) realizing the selective glucose photoreforming process. The regulatable band gap of ZxC1-xS endows 3DOM CTO-ZxC1-xS composites with sufficient light absorbance and adjustable redox potentials. As a result, the optimized 3DOM CTO-Z0.5C0.5S delivers the best performance for sustainable hydrogen evolution from glucose photoreforming with the rate of 4.05 mmol g-1 h-1 and the apparent quantum efficiency (AQY) of 6.48% under monochromatic light of 365 nm. In particular, the well-developed photocatalysts simultaneously produce gluconic acid with the selectivity up to 83.8% from the targeted oxidation of terminal aldehyde group of glucose. The DFT calculations on Gibbs free energy change of HER and the energy difference between reactants and products of OER further reveal that the constructed Z-scheme heterojunction contributes to the spatial separation of photogenerated electrons and holes for a good quantum efficiency and liquid product selectivity. This work demonstrates a sustainable technology for the coproduction of hydrogen and value-added chemicals from photocatalytic biomass valorization.
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高影响因子
JOURNAL OF POWER SOURCES
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2025
·
IF 7.9
Changqing Liu,Yufei Chen,Tao Wang,Ying Wang,Conghui Liu,Xingang Kong,Jianfeng Huang,Ling Guo,Lixiong Yin
To tackle the pressing dual challenges of the energy crisis and environmental pollution , it is urgent to develop low-cost, high-activity photocatalysts for solar-driven hydrogen production. In this work, a Zn x Cd 1-x S/protonated g-C 3 N 4 S-scheme heterojunction photocatalyst is successfully constructed using an electrostatic interaction-driven assembly strategy. The optimized composite photocatalyst exhibits a hydrogen evolution rate of 17.64 mmol g −1 h −1 , which is approximately 4.14 times and 28.45 times higher than that of pure Zn x Cd 1-x S and protonated g-C 3 N 4 . The apparent quantum efficiency (AQE) of ZCSCN-20 reaches 12.3 % at 420 nm. The electrostatic interaction drives the assembly of the heterojunction, leading to an intimate interfacial contact. This close connection, in turn, significantly shortens the migration distance and transfer time of photogenerated charges. The established S-scheme charge transfer pathway enables the efficient separation of photogenerated charge carriers while preserving the strong redox capability inherent in the constituent semiconductors. Furthermore, the use of sacrificial agents to deplete photogenerated holes further suppresses charge carrier recombination, synergistically enhancing the overall catalytic activity. This work provides an efficient strategy for preparing and optimizing sulfide-based S-scheme heterojunction photocatalysts, laying a foundation for developing stable, high-performance solar-driven hydrogen production systems.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2025
·
IF 19
Huakang Yang,Zining Zhang,Yudong Guo,Shuwen Yuan,Xiao Liu,Dongxiang Luo,Siyu Ye
Solar-driven photocatalytic CO 2 reduction coupled with the oxidation of organic compounds to value-added chemicals is a promising strategy, which can utilize both photogenerated electrons and holes. Here, a gradient alloyed CdS@Zn x Cd 1-x S@ZnS quantum dots (quasi-Type II band structure) capped with Cl − ligands demonstrate great potential in the simultaneous conversion of CO 2 and 1-phenylethanol into syngas and pinacol. The passivation with Cl − maximizes the exposure of surface-active sites and improves their electronic structure, providing a prerequisite for the efficient execution of redox reactions. More importantly, the p–π conjugation between chloride-ion ligands and the benzene ring provides a bridge for the ultrafast transfer of holes, which greatly promotes the activation of the Cα─H bond in 1-phenylethanol to release a mass of reactive free hydrogen. This process effectively lowers the thermodynamic energy barrier for CO 2 reduction, even as the excessively high kinetic energy barriers arising from the accumulation of excess protons also enable them to self-couple, leading to the generation of syngas (CO ≈ 75 mmol g −1 h −1 ; selectivity ≈ 69.86%). This work provides insights for future artificial photosynthesis to achieve high activity and cost-effective conversion of CO 2 into storable renewable resources and the co-production of value-added substances through synergistic organic oxidation.
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Catalysts
·
2025
·Vol. 15
·期 9
·819
·
IF 4
Xiang Wang,Xidan Zhang,Yifei Qu,Tian Liu,Juejing Luo,Ting Long,Liang Wu,Chong Tian,Yu Hu
Due to its broad-spectrum antibacterial activity, norfloxacin (NOR) has been widely used over the past few decades. However, the residual NOR in aquatic ecosystems could pose risks to human health from bacteria with resistance genes that potentially cause serious infectious diseases. Herein, a series of bandgap-tunable ZnxCd1−xS (x = 0~1) solid solutions were hydrothermally synthesized and used for NOR photodegradation under visible light and natural sunlight. Benefitting from the suitable bandgap, band structure, and unique tetrapod shape nanostructure, the Zn0.1Cd0.9S solid solution exhibited the best photocatalytic activity, with high degradation efficiencies of 83.23% and 86.28% under visible light and natural sunlight, respectively, within 60 min, which is remarkable among reported ZnxCd1−xS-based photocatalysts and other materials. The in situ reactive-species trapping experiment revealed that holes (h+) were the primary species, and a possible photodegradation mechanism was thus suggested. Moreover, Zn0.1Cd0.9S also exhibited decent reusability and stability after five cycles of experiments. This work provides a comprehensive exploration of the application of bandgap-tunable ZnxCd1−xS solid solutions for NOR photodegradation under visible light and natural sunlight, demonstrating the promising application of as-synthesized Zn0.1Cd0.9S in the photocatalytic degradation of antibiotics.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121460
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IF 7.2
Xin Wang,Rui Fang,Ruyi Meng,Ruiding Fei,Zhiping Yan
Photocatalytic hydrogen evolution reaction (HER) represents one of the key technologies for realizing renewable energy conversion and storage. However, the precise development of efficient HER photocatalysts remains a critical challenge due to rapid charge recombination. In this study, the NiS/Zn 0.5 Cd 0.5 S (NZCS-X) Schottky junctions were successfully synthesized by hydrothermal deposition of NiS nanoparticles on coral-like Zn 0.5 Cd 0.5 S nanoclusters. Under visible light irradiation, the optimal composite material achieves a hydrogen evolution rate of 104.48 mmol h −1 g −1 —over 41 and 2 times higher than that of pristine CdS (2.52 mmol h −1 g −1 ) and Zn 0.5 Cd 0.5 S (47.92 mmol h −1 g −1 ). Mechanistically, X-ray photoelectron spectroscopy (XPS) confirms the electron transfer from Zn 0.5 Cd 0.5 S to NiS. Femtosecond transient absorption (fs-TA) spectroscopy reveals that the average carrier lifetime decreases to 4.83 ps in the composite, providing direct evidence of ultrafast interfacial electron extraction. Density functional theory (DFT) calculations further demonstrate that metallic NiS acts as an electron sink to optimize the Gibbs free energy (ΔG H∗ ). This work concludes that the synergistic engineering of morphology and Schottky interfaces is a decisive strategy for designing high-performance sulfide photocatalysts.
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CHEMISTRY-A EUROPEAN JOURNAL
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2017
·Vol. 23
·期 65
·16653-16659
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IF 5.317
Shuangshuang Kai,Baojuan Xi,Yifeng Wang,Shenglin Xiong
Graphical Monodisperse submicrospheres : A one-pot method was developed for the preparation of monodisperse submicrospheres of core–shell CdS and its core–double shell derivative CdS@Zn x Cd 1− x S. Owing to its special semiconductor heterojunction, CdS@Zn x Cd 1− x S shows remarkably improved activity for H 2 evolution in comparison to bare CdS under visible-light irradiation (see figure). Chalcogenide micro/nanocomposite structures have been attracting worldwide attention due to prospective applications in photocatalytic hydrogen production. Well-defined micro/nanostructures with pronounced properties are of extraordinary importance. Herein, a facile one-pot method for the synthesis of monodisperse, size-controllable CdS core–shell and CdS@Zn x Cd 1− x S core–double shell submicrospheres, which were engineered with respect to structure and size, is reported. CdS core–shell submicrospheres with different sizes were selectively prepared for the first time. The growth mechanism was investigated in detail by monitoring the time-dependent morphology of intermediates by TEM. By introduction of a zinc precursor in the synthetic system, CdS@Zn x Cd 1− x S core–double shell submicrospheres were obtained by cation exchange of CdS with zinc ions, with a process of diffusion of CdS towards the outside and transformation of Zn x Cd 1− x S crystallites. The H 2 evolution rate over CdS@Cd x Zn 1− x S (5.17 mmol h −1 g −1 ) is 12.3 times that of CdS core–shell structures (0.42 mmol h −1 g −1 ) under visible light, owing to the efficient charge separation, as demonstrated by electrochemical impedance and transient-state time-resolved photoluminescence spectroscopy. Furthermore, CdS@Zn x Cd 1− x S core–double shell structures exhibited excellent stability over 20 h of hydrogen production.
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PubMed
高影响因子
ChemCatChem
·
2021
·Vol. 13
·期 21
·4591-4601
·
IF 5.686
Yujia Hu,Guiyang Yu,Chuanwang Xing,Shanshan Liu,Chuangyu Wei,Heyuan Liu,Jianzhuang Jiang,Xiyou Li
Graphical Twin Crystal Catalysis : A highly-efficient cocatalyst-free nano-twin crystal Zn x Cd 1−x S is employed to achieve highly efficient conversion of DNDPE with ∼99 % and the yield of ODA product with >99 % within 40 min reaction time under mild and environmentally friendly reaction condition. Semiconductor-based photocatalytic conversion of solar energy is a promising method for the synthesis of high value-added chemicals. In this paper, a cocatalyst-free nano-twin crystal Zn x Cd 1−x S (T−Zn x Cd 1−x S) semiconductor was employed to achieve almost complete conversion of DNDPE and the yield of ODA product achieves >99 % in 40 min reaction time without additional hydrogen source. As far as we know, this is the first time to apply the photocatalytic technology for reducing DNDPE to ODA, and the photocatalytic efficiency has greatly exceeded the result of traditional catalytic method. Theoretical calculation and isotope labeling in situ HPLC-MS analysis demonstrates that the reduction mechanism of DNDPE is two nitro groups of DNDPE are separately instead of simultaneously reduced, following the process of DNDPE→NO 2 −C 6 H 4 −O−C 6 H 4 −NO→NO 2 −C 6 H 4 −O−C 6 H 4 −NHOH→NO 2 −C 6 H 4 −O−C 6 H 4 −NH 2 →NO−C 6 H 4 −O−C 6 H 4 −NH 2 →NH 2 −C 6 H 4 −O−C 6 H 4 −NHOH→ODA. Hydrogen protons of water, instead of ethanol, provide the hydrogen source for the photocatalytic reduction of DNDPE to ODA.
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