FUEL
·
2025
·
IF 7.5
Yuchen Han,Yue Han,Yuxin Liu,Xingmeng Xu,Tingyang Li,Ruiyang Zhao,Jishu Han,Lei Wang
In the field of photocatalytic hydrogen production, the construction of p-n heterojunction was an effective strategy to solve the problem of high electron-hole pair recombination rate. In this paper, CoS 2 /CoMn 2 O 4 p-n heterojunction photocatalysts were successfully synthesized by loading CoS 2 nanoparticles on the surface of CoMn 2 O 4 nanocubes. Due to the strong light absorption performance, abundant active sites, and low photogenerated carrier recombination rate, CoS 2 /CoMn 2 O 4 exhibited significantly enhanced photocatalytic hydrogen production activity. Under light irradiation, the hydrogen production rate of CoS 2 /CoMn 2 O 4 could reach to 17.03 mmol/g within 3 h. This study provided a new idea for designing high-efficiency p-n heterojunction photocatalysts.
研究领域:
材料科学
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能源科学
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光催化技术
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2025
·
IF 2.9
He Yong,Lin Wensong,Gao Ran,Zhang Yeheng,Lin Huanxia
Bi 5 O 7 I was considered as a promising photocatalyst due to its unique structure. However, the recombination rate of electron–hole pairs generated by Bi 5 O 7 I is too fast, making it impossible for practical applications. In this study, Bi 5 O 7 I catalysts deposited with various amount of silver were manufactured and their photocatalytic efficiency for rhodamine B (RhB) was measured. It was found that Bi 5 O 7 I with a silver deposition of 15% (named as Bi 5 O 7 I/Ag-15) exhibits the highest catalytic performance, with a degradation rate of 97.34% for RhB after illumination for 90 min. The cyclic test results confirmed that Bi 5 O 7 I/Ag-15 still maintained high photocatalytic activity after six cycles of degradation. In addition, Bi 5 O 7 I/Ag-15 also exhibits an excellent photocatalytic performance in acidic or alkaline environments, indicating its potential for practical applications. A reasonable degradation mechanism for RhB photocatalysis was then proposed. Graphical abstract
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2021
·
IF 5.816
Kanxing Chen,Jincheng Liu,Zhilin Huang,Shuang Zong,Lingling Liu,Wei Tan
Photocatalytic hydrogen evolution is a prospective approach to solve the problem about energy crisis by fossil fuel combustion . As a possible novel photocatalyst for hydrogen generation , MnPS 3 suffered from the lower photocatalytic activity caused by its high electron-hole recombination rate and poor oxidation capability of holes. In this paper, the MnPS 3 nanosheets were exfoliated under sonication process in the solution of N-methylpyrrolidone (NMP) and 3-ethoxypropylamine, and then a series of Z-scheme 2D-0D MnPS 3 –Cs 4 W 11 O 35 composites were prepared by a facile electrostatic assembling approach. The exfoliated MnPS 3 nanosheets with the thickness of 5.4 nm present evidently increased interlayer spacing of 17.6 Å compared with 6.42 Å of bulk MnPS 3 . The Cs 4 W 11 O 35 of 20–25 nm are uniformly immobilized on the surface of 400 nm exfoliated MnPS 3 sheets with strong interfacial interaction of S–W–O bonds. The MnPS 3 –Cs 4 W 11 O 35 composites show extended light absorption area, reduced charge recombination and significantly improved hydrogen generation activity compared with MnPS 3 nanosheets. The highest hydrogen evolution rate of the MnPS 3 –Cs 4 W 11 O 35 composites reaches 99.6 μmol g −1 h −1 with a Cs 4 W 11 O 35 mass percent of 10.9, which is 2.9 times of MnPS 3 nanosheets. The photocatalytic activity of MnPS 3 –Cs 4 W 11 O 35 remains nearly unchanged after 4 cycles. As far as we are aware, there is no work carried out on the exfoliation of MnPS 3 sheets in NMP and the fabrication of MnPS 3 –Cs 4 W 11 O 35 composite for the enhanced photocatalytic hydrogen generation yet. Our work provides a new reference method for the preparation of unlaminated composite materials, and the novel MnPS 3 -based composite will be a useful supplement to the photocatalytic production of clean energy.
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
Nanomaterials
·
2019
·Vol. 9
·期 9
·1244
·
IF 4.034
Haizeng Song,Han Wu,Yuan Gao,Ka Wang,Xin Su,Shancheng Yan,Yi Shi
Tin disulfide (SnS2) has gained a lot of interest in the field of converting solar energy into chemical fuels in light-assisted electrochemical water splitting due to its visible-light band gap and high electronic mobility. However, further decreasing the recombination rate of electron-hole pairs and increasing the density of active states at the valence band edge of the photoelectrodes were a critical problem. Here, we were successful in fabricating the super-thin SnS2nanostructure by a hydrothermal and solution etching method. The super-thin SnS2nanostructure as a photo-electrocatalytic material exhibited low overpotential of 0.25 V at the current density of −10 mA·cm−2and the potential remained basically unchanged after 1000 cycles in an H2SO4electrolyte solution, which was better than that of the SnS2nanosheet and SnS/SnS2heterojunction nanosheet. These results show the potential application of super-thin SnS2nanostructure in electrochemical/photo-electrocatalytic field.Keywords:layered semiconductor;solution etching;SnS2nanostructure;light-Assisted electrochemical water splitting
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
DYES AND PIGMENTS
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2023
·
IF 4.5
Chunhong Gao,Jinjia Liu,Meilin Jia,Gala Sa,Aiju Xu
Photocatalytic technology has broad prospects in the degradation of organic pollutants due to its green, energy-saving and high-efficiency characteristics. In this study, TiO 2 and V–TiO 2 were prepared by hydrothermal method , and the catalysts were tested by experimental and theoretical calculations under a 400 W metal halide lamp degradation efficiency for aniline (30 mg/L). The synthetic photocatalysts were characterized by XRD , HRTEM , FT-IR, XPS , UV–Vis DRS , PL , EIS , and photocurrent , the results showed that the edges of the V-doped TiO 2 absorption band were redshifted, the band gap value were reduced, the photocatalytic activity were improved, and the PL showed e − /h + had the lowest composite rate for 1.5 mol%V–TiO 2 and broadens the optical response range. 1.5 mol% V was the optimal value for photodegrading aniline, and moderate V modification can significantly inhibit the complexation of e − /h + pairs. Finally, stability measurements performed over 5 cycles show that 1.5 mol%V–TiO 2 has excellent stability. The calculation results show that the optical band gap of V–TiO 2 were significantly reduced, the photocatalytic performance of V–TiO 2 were greatly enhanced.
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
Nano Energy
·
2023
·
IF 17.6
Kailai Zhang,Xiaodong Sun,Haitang Wang,Yali Ma,Hongwei Huang,Tianyi Ma
Single component semiconductor materials with piezoelectric response can promote the activation of hydrogen ions (H + ) and the generation of hydrogen (H 2 ) under the action of mechanical force, but the high recombination rate of carriers is the major obstacle to strengthen piezocatalytic efficiency. Here, a groundbreaking Bi 2 MoO 6 -BaTiO 3 (BMO-BTO) Type-I heterojunction piezocatalyst is successfully fabricated through a solvothermal strategy, and applied for cocatalysts-free piezocatalytic H 2 production reaction. Under ultrasonic vibration, the H 2 production rate of BMO-0.1BTO heterojunction can reach up to nearly 152.57 µmol/g/h, which is approximately 9.33 and 4.47 times with respect to that of pristine BMO (16.36 µmol/g/h) and BTO (34.16 µmol/g/h) alone, respectively. Furthermore, BMO is also combined with other commonly used piezocatalysts to construct heterojunctions, and analogous marvelous piezocatalytic H 2 production performance was attained. The enhanced piezocatalytic H 2 production performance can be credited to the established built-in electric field (BIEF) in heterojunction extraordinarily suppressed the recombination rates of piezocarriers, rather than an increase in piezoelectricity, which is emphatically verified through a series of physics and chemical characterizations. This study presents an innovative paradigm for fabricating BMO-based heterojunction piezocatalyst to efficiently convert mechanical energy into chemical energy.
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 ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Hongmei Chen,Yanyun Fan,Hongyan Xu,Danfeng Cui,Chenyang Xue,Wendong Zhang
Herein, a microwave hydrothermal method was developed for constructing g-C 3 N 4 nanosheets. The specific surface area of the photocatalyst using this method was larger than the bulk carbon nitride . In addition, this method yields g-C 3 N 4 with a lower electron-hole recombination rate and faster interface charge transport. Particularly, the conduction band shifts to a more negative position, leading to better reducibility. As expected, the g-C 3 N 4 nanosheets had excellent activity in hydrogen evolution (over 10 times that of the bulk carbon nitride). Additionally, the photocatalyst prepared using this method had good stability in the hydrogen evolution reaction. This work proposes a new, universal, facile and green technique route for preparing g-C 3 N 4 nanosheets.
研究领域:
材料科学
·
能源化学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
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IF 16.683
Xianghai Song,Xin Li,Xinyu Zhang,Yuanfeng Wu,Changchang Ma,Pengwei Huo,Yongsheng Yan
Photocatalytic reduction of CO 2 to hydrocarbon fuels is an ultimate and utmost strategy to resolve the ever-increasing environmental problems and energy crisis. Our study aimed to develop a specific type of photocatalysts with increasing light utilization efficiency, reducing electron-hole recombination rate and enhancing photocatalytic activity by integrating unique donor-acceptor systems into the polymeric network of graphitic carbon nitride (g-CN). The results of the characterization showed that C and O are successfully integrated into the framework of g-CN. The O-containing and C-containing section of the as-prepared catalysts (OCCNx) play the role of donor and acceptor, respectively. The donor-acceptor systems of OCCN x offer an extra electron transfer transition mode, which dramatically extends the optical absorption range, and narrows down the bandgap of g-CN from 2.74 to 2.03 eV. Also, the donor-acceptor systems significantly improve the delocalized ability of the photoinduced charge carriers, which efficiently prolongs the lifetime of the charge carriers and reduces the electron-hole recombination rate, as all of these are all beneficial for boosting the photocatalytic activity of the catalysts. Experimental results show that OCCN 0.25 displays the best photocatalytic CO 2 reduction performance with a CO production rate of 34.97 μmol g −1 in 4 h, which is 4.3-fold higher than that obtained in the case of bulk g-CN. Moreover, the reaction is performed in water without any co-catalyst and sacrificial agent, which makes it a green and environmentally friendly reaction. Results obtained from DFT simulation agree well with the empirical results, and a possible reaction mechanism is suggested based on these calculations.
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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DOI
高影响因子
Micro & Nano Letters
·
2017
·Vol. 12
·期 12
·1020-1023
·
IF 0.723
Feifan Xu,Gang Cheng,Yi Wei,Rong Chen
BiOCl/Bi 2 S 3 hollow hybrids were synthesised through a mild anion-exchange method from BiOCl microspheres and thiacetamide. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, nitrogen adsorption measurements, ultraviolet–visible–near-infrared diffuse reflectance spectra, photocurrent, and electrochemical impedance spectroscopy (EIS) were employed to study the composition, structure, and properties of the as-synthesised BiOCl/Bi 2 S 3 hybrids. Compared to pure Bi 2 S 3 and BiOCl products, the as-prepared BiOCl/Bi 2 S 3 hollow hybrids exhibited superior capability for photocatalytic reduction of hexavalent chromium under vis light irradiation. The photocurrent and EIS results demonstrated that the low recombination rate of photoinduced electron–hole pairs was contributed to the enhanced photoreduction activity.
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
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
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2021
·Vol. 30
·期 5
·3795-3805
·
IF 1.819
Mao Xisong,Xia Xuewen,Li Junqi,Chen Chaoyi,Zhang Junshan,Ning Deyang,Lan Yuan-Pei
Homogeneously rare-earth (RE=La, Sm and Y) ions doped CeO 2 nanoparticles (NPs) with enhanced photocatalytic performance were synthesized by a facile KOH-NaOH molten flux method. XRD, TEM, EDS mapping and XPS results demonstrate that RE cations have been successfully doped into the CeO 2 lattice, which leads to the lattice expansion/shrinking, and more oxygen vacancies are generated after RE ions doping. The UV-Vis DRS and PL spectra indicate that RE-doped CeO 2 samples have slightly narrower band gaps and significantly reduced photo-generated electron-hole recombination rates. 5% RE ions doped CeO 2 NPs show excellent photocatalytic performances and the photodegradation ratio of methylene blue (MB) increases from 71.63% of undoped CeO 2 to 76.35%, 77.51% and 77.37% for 5%-La, 5%-Sm and 5%-Y-doped CeO 2 NPs, respectively. The obviously reduced recombination rate of e − /h + pairs after RE ions doping may be the critical factor for the enhanced photocatalytic performance.
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
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Jun Liang,Yao Chai,Li Li,Deli Li,Jinni Shen,Yongfan Zhang,Xuxu Wang
The conversion of CO 2 into renewable fuels by artificial photosynthesis is an attractive solution for storing solar energy in the form of chemical fuel. Herein, we presented a general molten-salt route to synthesize spinel germanium and iron double-substituted ZnGa 2 O 4 solid solutions. Introducing ZnFe 2 O 4 and Zn 2 GeO 4 into ZnGa 2 O 4 can effectively expand the light-harvesting wavelength range to improve the ability of photocatalyst in CO 2 reduction and H 2 O oxidation. The solid solutions provide a larger effective mass of holes compared with electrons through the introduction of Fe3d, Ge4s and Ge4p orbitals according to DFT analysis. This leads to a great difference in the mobility between the electrons and holes to lessen the electron–hole recombination rate, and enhance the conversion of CO 2 and H 2 O in kinetics. This approach is developed to achieving smaller bandgap values and a closer bracketing of the CO 2 /reduced-H 2 O/oxidized redox couples to drive the overall conversion of CO 2 and H 2 O.
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
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 26
·40041-40052
·
IF 5.19
Luo Qin,Huang Xiaofeng,Deng Qiulin,Zhao Xueyuan,Liao Huiwei,Deng Hongquan,Dong Faqin,Zhang Tao,Shi Lianjun,Jiang Jinlong
The photocatalytic properties of Zn/Co zeolite imidazolate frameworks (ZIF-ZnCo) prepared by various Zn/Co ratio are of significantly diversity due to the morphology structure of the ZIF-ZnCo. Thereinto, the prepared ZIF-ZnCO-8:1 is excellent capability by virtue of its 3D cross-shaped structure. Spectral test results show that as-prepared novel 3D cross-shaped ZIF-ZnCo has a lower recombination rate of electron and hole pairs than the lamellar and dodecahedral, thus improving the photocatalytic ability. The photocatalytic ability of 3D cross-shaped ZIF-ZnCo was carefully investigated for removing mixed solution of Congo Red (CR) and Cr(VI). The photocatalytic reduction ability of 3D cross-shaped ZIF-ZnCo was 22% higher than ZIF-8 for Cr(VI). Meanwhile, CR was altogether removed at dark processing and Cr(VI) was removed 70% after dark processing 120 min and photocatalytic 240 min. Therefore, the high adsorption and photocatalytic capacity denote the potential application of 3D cross-shaped ZIF-ZnCo. Graphical abstract
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）