JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Shu Wang,Yongxin Jiao,Du Peng,Wenlong Yang,Hui Zhang,Shuang Han
There is growing interest in developing artificial-photosynthesized S-scheme heterostructures in photocatalytic applications. Herein, we proposed a Zn 0.5 Cd 0.5 S/WO 3 S-scheme heterostructure, possessing the trifunctionally catalytic applications of H 2 production in water-splitting, heavy metal photoreduction degradation, and antibiotic photooxidation degradation. We have chosen the optimized component to construct this heterostructure according to the best catalytic performance of Zn 1-x Cd x S solid solutions. These heterojunction composites have been prepared by traditional two-step hydrothermal method, subsequently their heterojunction construction, the photophysical transfer process of photogenerated carriers, and the photocatalytic reaction mechanism have been revealed by systemically characterizations and theoretical simulation calculations. These findings provide new insight into photocatalytic function expansion and the mechanism of photocatalytic activity improvement guided by photophysical processes.
研究领域:
材料科学
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环境科学
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光催化技术
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DOI
高影响因子
Nano Energy
·
2016
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IF 11.553
Zongwei Mei,Bingkai Zhang,Jiaxin Zheng,Sheng Yuan,Zengqing Zhuo,Xianguang Meng,Zonghai Chen,Khalil Amine,Wanli Yang,Lin.-Wang Wang,Wei Wang,Shufeng Wang,Qihuang Gong,Jun Li,Fu.-Sheng Liu,Feng Pan
Cu-doping into Zn 1−x Cd x S can greatly enhance the photocatalytic H 2 evolution from water splitting under visible-light irradiation. However, it is still controversial for how the Cu-dopant improves this performance. Here, we report that appropriate Cu-doped Zn 0.5 Cd 0.5 S nanocrystals reach 21.4 mmol/h/g of H 2 evolution rate without cocatalyst in the visible-light region, which is also 2.8 times as high as that of the undoped counterpart, and the corresponding apparent quantum efficiency is 18.8% at 428 nm. It is firstly confirmed that the Cu 2+ changes into Cu + after being doped by soft X-ray absorption spectroscopy (sXAS). We theoretically propose that the transformation of 2Cu 2+ to 2Cu + results in one adjacent S 2 − vacancy (V S ) in host during the doping process, while the Cu + -dopant and V S attract the photoexcited holes and electrons, respectively. Accordingly, the photocatalytic activity is improved due to the enhanced separation of photoexcited carriers accompanied with the enhanced light absorption resulting from the Cu + -dopant and 2Cu + /V S complex as possible active site for photocatalytic H 2 evolution.
研究领域:
材料科学
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光催化
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产品关联
DOI
高影响因子
Solar RRL
·
2023
·Vol. 7
·期 12
·2300188
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IF 7.9
Yichao Wang,Zipeng Xing,Chunxu Wu,Meijie Liu,Jiapeng Gao,Na Zhang,Zhenzi Li,Haixia Liu,Wei Zhou
The development of heterojunction composite photocatalysts with sophisticated charge transfer mechanisms and interfaces is a promising approach to enhance photocatalytic efficiency. Herein, for the first time, a peanut-like Zn 0.5 Cd 0.5 S/BiVO 4 S-scheme heterostructure visible-light composite photocatalyst via a two-step hydrothermal method is synthesized. S-scheme heterostructures, which can maintain the maximum redox capacity in the conduction and valence bands of the catalyst, have been established as an effective charge transfer mode in the field of photocatalysis. The Zn 0.5 Cd 0.5 S/BiVO 4 heterojunction photocatalyst exhibits 99.52% degradation efficiency for tetracycline-based organic pollutants under visible light irradiation. In addition, the photocatalytic hydrogen production efficiency of the composite catalyst is as high as 8969.58 μmol g −1 h −1 , which is 69.24 and 4.35 times higher than that of single BiVO 4 and Zn 0.5 Cd 0.5 S, respectively. Through density functional theory calculations and experimental studies, the material conformed to the charge transfer mode of the S-scheme heterojunction is determined. The improved photocatalytic efficiency can be attributed to the formation of S-scheme heterogeneous interface, which bends the energy band at the interfacial contact, and the formation of an internal electric field, which hinders rapid charge recombination and prolongs the lifetime of charge carriers.
研究领域:
材料科学
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光催化技术
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yunqi Ning,Shan Wang,Hanbing Wang,Wei Quan,Daqi Lv,Shansheng Yu,Xiaoying Hu,Hongwei Tian
The development of low-cost and efficient metal sulfide photocatalysts through morphological and structural design is vital to the advancement of the hydrogen economy. However, metal sulfide semiconductor photocatalysts still suffer from low carrier separation and poor solar-to-hydrogen conversion efficiencies. Herein, two-dimensional ZnIn 2 S 4 nanosheets were grown on Zn 0.5 Cd 0.5 S hollow nanocages to construct Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 hollow nanocages for the first time. Novel hollow core–shell Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 /MoS 2 nanocages with Z-scheme heterojunction structures were obtained by incorporating MoS 2 nanosheet co-catalyst via the solvothermal method. The resulting Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 /MoS 2 exhibited unique structural and compositional advantages, leading to remarkable photocatalytic hydrogen evolution rates of up to 8.5 mmol·h −1 ·g −1 without the use of any precious metal co-catalysts. This rate was 10.6-fold and 7.1-fold higher compared to pure ZnIn 2 S 4 and Zn 0.5 Cd 0.5 S, respectively. Moreover, the optimized Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 /MoS 2 photocatalyst outperformed numerous reported ZnIn 2 S 4 -based photocatalysts and some ZnIn 2 S 4 -based photocatalysts based on precious metal co-catalysts. The exceptional photocatalytic performance of Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 /MoS 2 can be attributed to the Z-scheme heterojunction of core–shell structure that enhanced charge carrier separation and transport, as well as the co-catalytic action of MoS 2 . Overall, the proposed Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 /MoS 2 with heterojunction structure is a promising candidate for the preparation of efficient photocatalysts for solar-to-hydrogen energy conversion.
研究领域:
材料科学
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能源科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Dongfang Hou,Qian Zhu,Junjie Wang,Min Deng,Xiu-qing Qiao,Bojing Sun,Qingwen Han,Ruan Chi,Dong-Sheng Li
Optimized fabrication of Z-scheme photocatalyst based on MOF materials offers sustainable energy generation and environmental improvement due to their attractive properties. The Z-scheme heterojunctions consisting of UiO-66 cubes covered with Zn 0.5 Cd 0.5 S nanoparticles were fabricated by a facile solvothermal method. Thanks to the Z-scheme carrier transport under simulated sunlight irradiation, UiO-66@Zn 0.5 Cd 0.5 S exhibited enhanced photocatalytic performance of H 2 generation synchronized with organic pollutant degradation in fluoroquinolone antibiotic wastewater. Synergistically, the highest comprehensive performance was obtained in ciprofloxacin solution. The H 2 yield reached 224 μmol∙ g −1 ∙ h −1 and simultaneously the removal efficiency was up to 83.6 %. The degradation pathways revealed that the process of piperazine ring cleavage and decarboxylation also generates H protons, further promoting the production of H 2 . Therefore, the effective spatial separation and transfer of the photoinduced carriers are attributed to the good band structure, large specific surface area, and cooperative reduction and oxidation reactions of UiO-66@Zn 0.5 Cd 0.5 S, resulting in significant photocatalytic activity. The toxicity assessment of antibiotics and intermediate products during the photocatalytic reaction also verifies the reduction of environmental risk. This study highlights a promising way to expand the application of the MOFs-based photocatalyst in clean energy conversion coupling with water remediation.
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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产品关联
DOI
PubMed
高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Yuyang Wang,Chun Cai
It is a promising endeavor to explore the photocatalytic oxidation for 5-hydroxymethylfurfural (HMF) to produce high-value-added derivatives. The absence of efficient photocatalytic systems has hindered the transformation of HMF to 2,5-diformylfuran (DFF), while DFF is susceptible to subsequent oxidation into 2,5-furandicarboxylic acid (FDCA). Herein, we design a Z-scheme heterojunction photocatalyst α-Fe2O3/Zn0.5Cd0.5S via hydrothermal methods, which exhibits superior activity toward the selective oxidation of HMF to DFF or FDCA in aqueous solution. Photocatalytic investigations demonstrated the highest activity for 15% Fe2O3/Zn0.5Cd0.5S, resulting in a DFF selectivity of 99% and conversion of 75%, affording FDCA selectivity of 85% and conversion of 99%. The high catalytic activity has been ascribed to the effective separation of photogenerated charge carriers and generation of reactive oxygen species (ROS) in different atmospheres with the Z-scheme mechanism. Research revealed that the oxidation to DFF is associated with •OH in an Ar environment, while the generation of FDCA is related to •O2– in the air. Moreover, selective oxidation may also exhibit significant potential for the utilization of sunlight and other benzene substrates. Overall, this study offers a unique demonstration of designing a noble metal-free Z-scheme heterojunction photocatalyst for the oxidation of HMF to selective products in water.
研究领域:
化学工程
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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
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lele Wei,Ru Song,Jiarui Song,Yaping Li,Yina Nie,Lin Liu,Jun Wan
To achieve efficient artificial photosynthesis of hydrogen production coupled with benzyl alcohol oxidation, it is imperative to address the key kinetic bottlenecks that limit photocatalysis performance comprehensively. Herein, we synthesized a D–A conjugated polymer pyrene-thienothiophene (PyTT) containing thiophene rings acceptor unit via a direct C–H arylation reaction. Subsequently, an innovative ZCS/PyTT inorganic/organic S-scheme heterojunction was successfully constructed by synthesizing Zn 0.5 Cd 0.5 S (ZCS) nanocrystals in situ on the surface of PyTT nanosheets. By enabling this design, the optimized ZCS/5PyTT heterojunction exhibits significantly enhanced rates of H 2 and benzaldehyde (BAD) production at 4.52 and 4.12mmol g −1 h −1 respectively under only two sun light intensity, which are 2.69 and 2.80 times higher than pristine ZCS. The outstanding photocatalytic performance can be attributed to the efficient charge separation and transfer efficiency, enhanced light absorption capability, as well as increased concentration of active carriers in reaction. Particularly, the interface charge transfer mechanism involved in ZCS/PyTT S-scheme heterojunction is comprehensively investigated through in situ irradiated X-ray photoelectron spectroscopy (XPS) and photo-irradiated Kelvin probe force microscopy (KPFM) analyses. This study provides a protocol for preparing specific inorganic/organic S-scheme heterojunction photocatalysts aimed at achieving efficient cooperative photo-redox coupling of H 2 production and organic transformations.
研究领域:
材料科学
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化学
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能源科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Min Chen,Xubo Huang,Chen Chen,Wenqing Hou,Yiming Xu
Production of H 2 from water splitting is challenging. Herein, we report an increased production of H 2 on Zn 0.5 Cd 0.5 S (ZnCdS) in aqueous solution under a 420 nm LED lamp, via 4 wt % MCo 2 O 4 (M = Mg, Cr, Mn, Fe, Co, Ni, Cu, and Zn). Without addition of sacrifices, the rate of H 2 evolution ( R H , in a unit of mmol g ―1 h ―1 ) was 0.0154 for ZnCdS, and 0.057―0.551 for MCo 2 O 4 /ZnCdS. On addition of Na 2 S/Na 2 SO 3 , the corresponding R H increased to 18.5 and 31.5―78.2, respectively. In both cases, no H 2 was observed for MCo 2 O 4 . However, the R H obtained in presence of Na 2 S/Na 2 SO 3 had a negative correlation with M s and R 2 , respectively, where M s was the magnetization degree of MCo 2 O 4 , and R 2 was the charge transfer resistance for MCo 2 O 4 /ZnCdS at solid-liquid interface. Electrochemical measurement showed that MCo 2 O 4 /ZnCdS was more active than ZnCdS for proton reduction, water oxidation, and water(sulfide/sulfite) photo-oxidation, respectively. According to the solid photoluminescence, band parameters, and open circuit potentials, formation of a p-n junction is proposed, which facilitates the photoelectron transfer to ZnCdS for proton reduction, and the photohole transfer to MCo 2 O 4 for water (sulfide/sulfite) oxidation. It is also proposed that the magnetic field of MCo 2 O 4 inhibits the charge transfer between MCo 2 O 4 and ZnCdS. This work suggests that MCo 2 O 4 spinels are good co-catalysts, but their magnetization need to be minimized.
研究领域:
材料科学
·
化学
·
催化
·
光化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Yanlin Jia,Zizhao Wang,Xiu-Qing Qiao,Lei Huang,Shenglong Gan,Dongfang Hou,Dong-Sheng Li
Metallic MoSe 2 with distinct platinum-like electronic configuration and compelling band gap structure exhibits zero approaching Gibbs free energy for H atom, hence can be approved as an ideal cocatalysts for H 2 evolution. However, the reports on MoSe 2 cocatalyst still leaves much room. Here, two dimensional ultrathin MoSe 2 nanosheets bedecked Zn 0.5 Cd 0.5 S nanoparticles were reported as efficient photocatalyst, in which metallic MoSe 2 nanosheets cocatalyst will do duty for electron sink to promote the separation of charge carriers and prolong the electrons lifetime, thus benefiting the improved photocatalytic H 2 evolution activity. As a result, Zn 0.5 Cd 0.5 S/MoSe 2 composite with an optimized 9 wt% MoSe 2 presents a higher H 2 evolution activity of 4853.3 μmol g -1 h −1 , 3.57 folds of pure Zn 0.5 Cd 0.5 S sample (1361.0 μmol g -1 h −1 ). Meanwhile, the greatly enhanced photo-reduction efficiency for toxic heavy metal Cr (VI) ion by Zn 0.5 Cd 0.5 S/MoSe 2 composite further certifies the promoted separation of electron- hole pairs. These results turned out that MoSe 2 is qualitied as candidate to serve as promising co-catalyst for photocatalyst energy conversion and decontamination.
研究领域:
材料科学
·
环境科学
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纳米技术
·
催化
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Dongsheng Dai,Hao Xu,Lei Ge,Changcun Han,Yangqin Gao,Songsong Li,Yan Lu
The generation of hydrogen (H 2 ) through photocatalytic water splitting with the employment of various co-catalysts has attracted much attention. In this study, the CoP was successfully decorated on Zn 0.5 Cd 0.5 S as a highly efficient co-catalyst via a two-step in-situ chemical deposition method. The chemical as well as photophysical properties of the as-obtained CoP/Zn 0.5 Cd 0.5 S samples were characterized by X-ray diffractometry (XRD), Transmission electron microscope (TEM), UV–vis diffusion reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS) and surface photovoltage spectroscopy (SPV). The CoP/Zn 0.5 Cd 0.5 S composite sample with 5% molar content showed the highest photocatalytic H 2 evolution activity with a corresponding H 2 evolution rate of 734 umol h −1 , which was about 20 times higher than that of pure Zn 0.5 Cd 0.5 S sample and 2 times higher than Pt loaded Zn 0.5 Cd 0.5 S sample under visible light irradiation. The photocatalytic activity of the CoP/Zn 0.5 Cd 0.5 S composite sample was stable even after 4 cycling photocatalytic experiments. A possible mechanism on the photocatalytic enhancement of CoP was systematically investigated, which can provide a novel concept for the synthesis of other desirable photocatalytic materials with high photocatalytic performance.
研究领域:
材料科学
·
光催化
·
能源化学
·
纳米材料
·
半导体催化
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太阳能转化
·
氢能
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Xiangyu Zhou,Jingbo Wu,Yan Xiao,Yinhua Jiang,Wenli Zhang,Yan Liu,Zhanchao Liu,Jianming Zhang
Reasonable design and construction of heterogeneous photocatalysts with close interface contact are considered as the effective strategy to realize the application of highly efficient solar for hydrogen evolution and pollutant degradation. Here, a novel Zn 0.5 Cd 0.5 S nanospheres/Sn 3 O 4 nanosheets (ZCS/SO) heterostructure photocatalyst was firstly synthesized using a simple hydrothermal method, where Zn 0.5 Cd 0.5 S nanospheres in-situ grew on the surfaces of Sn 3 O 4 nanosheets derived by ultrasonicating Sn 3 O 4 nanoflowers. The synthesized ZCS/SO heterostructure exhibited much higher photocatalytic activity for H 2 production and tetracycline hydrochloride (TCH) degradation than pristine Sn 3 O 4 and Zn 0.5 Cd 0.5 S. The optimal ZCS/SO-10 performed the highest rate of hydrogen production of 7.19 mmol·g −1 ·h −1 , which was 112.3 and 3.6 times those of Sn 3 O 4 and Zn 0.5 Cd 0.5 S, respectively. And the AQY of ZCS/SO-10 for H 2 evolution was up to 16.6 % at λ = 420 nm. Moreover, ZCS/SO-10 displayed the highest TCH degradation rate (0.0484 min −1 ), which were 228.3 and 1.9 times those of Sn 3 O 4 (0.000212 min −1 ) and Zn 0.5 Cd 0.5 S (0.0249 min −1 ). Such excellent dual-functional photocatalytic performance of ZCS/SO heterostructure could be attributed to the synergistic effect between Sn 3 O 4 and Zn 0.5 Cd 0.5 S as well as the formation of heterogenous interfaces with close contacts, which greatly increased specific surface area, enlarged spectral response range, enhanced hydrophilicity and accelerated photogenerated charge transfer, resulting in the improvement of photogenerated charge yield and photoreaction efficiency. Detailed electron transport mechanisms and possible degradation paths of TCH were also proposed. This work provides a feasible strategy for the preparation of transition metal sulfide photocatalysts efficiently utilizing solar energy to realize the production of clean energy and water environmental remediation.
研究领域:
材料科学
·
环境科学
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能源科学
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2019
·
IF 1.795
Yu Guo,Jie Li,Xuanxuan Yang,Yongbing Lou,Jinxi Chen
Hydrogen production by photocatalysis under visible light irradiation is a pivotal means of obtaining hydrogen. In this study, Zn 0.5 Cd 0.5 S was studied to have optimal hydrogen production performance among different zinc-cadmium ratios of Zn x Cd 1-x S, and a series of Zn 0.5 Cd 0.5 S/MIL-125-NH 2 (Ti) composites with different MIL-125-NH 2 (Ti) contents were prepared by simple ultrasonic method. When the percentage of addition of MIL-125-NH 2 (Ti) was 40%, the optimum hydrogen production rate was 92,498 μmol h −1 g −1 , and the photocatalytic activity was still stable even after 16 h. The mechanism investigations demonstrated that this excellent activity was owing to enhanced visible light absorption intensity, extremely efficient electron transfer and proper conduction band position. This work provides new insights into highly efficient and stable photocatalyst in hydrogen production from water without noble metal doping.
研究领域:
材料科学
·
化学
·
能源
·
纳米技术
·
光催化
✓ 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）