JOURNAL OF SOLID STATE CHEMISTRY
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2024
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IF 3.2
Shuang Hou,Min Ma,Chun Wang,Peifang Wang,Zhe Ji,Shufang Tian,Mingxue Li
The generation of oxygen vacancies assumes a pivotal role in the photocatalytic degradation of antibiotics. Surface oxygen vacancies serve as deterrents to the recombination of photogenerated carriers, thereby augmenting photocatalytic efficiency. In this work, the NaBH 4 reduction technique was adopted to introduce oxygen vacancies onto the surface of Ta 2 O 5-x , thus enhancing its photocatalytic powers. Remarkably, the photocatalytic activity of the modified Ta 2 O 5-x -0.5 M samples exhibited significant improvement upon treatment with NaBH 4 solution at varied concentrations. Characterization of the modified Ta 2 O 5-x samples was conducted using a suite of techniques including XRD, FT-IR, UV–vis DRS, ESR, XPS, and EPR. Notably, the EPR spectrum provided compelling evidence of the presence of oxygen vacancies, affirming their existence on the surface of the modified Ta 2 O 5-x samples. To further corroborate the formation of oxygen vacancies, tetracycline (TC) solution was employed as a simulated pollutant, revealing a marked enhancement in visible light catalytic activity through experimental observations. The findings elucidate that the defect sites engendered by oxygen vacancies primarily enhance the efficiency of electron-hole pair separation and facilitate greater absorption of visible light, thereby amplifying photocatalytic activity. The modification of Ta 2 O 5-x samples by NaBH 4 reduction predominantly facilitates the introduction of oxygen vacancies on the surface, consequently bolstering photocatalytic performance. This exemplifies a noteworthy approach for significantly enhancing the photocatalytic activity of Ta 2 O 5-x , providing valuable insights for future design strategies.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
MATERIALS LETTERS
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2023
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IF 3
Lina Tian,Yiping Zhang,Linjuan Dai,Changhui Xin,Qian Li,Yanting Tang,Xin Yu
Fabrication of tantalum-based composite photocatalysts with high-performance for dealing with organic pollutants remains valuable and highly urgent nowadays. In this work, amorphous In 2 S 3 decorated Ta 2 O 5-x mesocrystals were fabricated for tetracycline degradation under visible-light irradiation. The introduction of amorphous In 2 S 3 highly improved the visible-light absorption and charge separation, and the prepared In 2 S 3 /Ta 2 O 5-x mesocrystals showed highly enhanced photocatalytic performance towards tetracycline degradation, and the corresponding rate constant was approximately 0.00658 min −1 , which was 5.58 times that of In 2 S 3 and 3.64 times that of Ta 2 O 5-x mesocrystals. The enhanced visible-light photocatalytic performance for the In 2 S 3 /Ta 2 O 5-x mesocrystals was mainly attributed to the fabrication of strongly combined interface between In 2 S 3 and Ta 2 O 5-x mesocrystals.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Jielin Huang,Shuaifei Liu,Wen Long,Qi Wang,Xin Yu,Shijie Li
Fabricating rapid and high-efficient charge-transfer pathways is contributing to improving charge separation and receiving extensive concerns in preparation of semiconductors composites photocatalysts. In this work, ternary Ag/AgCl/Ta 2 O 5−x mesocrystals were fabricated for visible-light photodegradation of emerging pollutants by introducing Ag/AgCl nanoparticles into defects engineered Ta 2 O 5−x mesocrystals. The prepared composites showed efficient visible-light absorption and efficient visible-light photodegradation of emerging pollutants, mainly attributed to the fabricating of high-efficient Z-scheme charge-transfer pathways between Ag/AgCl and Ta 2 O 5−x mesocrystals. Note that, the experimental results also demonstrated the significant roles of defects engineered Ta 2 O 5−x mesocrystals in fabricating high-efficient Z-scheme charge-transfer pathways. Besides, the prepared Ag/AgCl and Ta 2 O 5−x composites could be employed for efficient visible-light photodegradation of many other organic contaminants. Current work indicates a promising and high-performance visible-light composite photocatalyst for dealing with emerging contaminants.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Yanting Tang,Jielin Huang,Shuaifei Liu,Dandan Xiang,Xinqi Ma,Xin Yu,Mingxue Li,Quanhui Guo
Mesocrystals are types of fascinating multifunctional materials in fabricating rapid charge transport pathways, and surface engineering could be considered as a significant influencing factor in boosting charge separation for efficient photocatalytic application. In this work, surface engineered Ta 2 O 5−x mesocrystals were synthesized by facile alkali treatment strategy for enhanced visible light photocatalytic tetracycline degradation. The highly enhanced photocatalytic activity could be attributed to the highly increased surface areas and surface hydroxyl groups to compare with those of commercial Ta 2 O 5 and pristine Ta 2 O 5−x mesocrystals, which could provide more surface reactive sites and high electron density center for trapping photo-generated holes. Besides, possible tetracycline transformation pathways over surface engineered Ta 2 O 5−x mesocrystals and visible light photocatalytic mechanism were also proposed in this work. Current work also provides a facile strategy for regulating surface property of ultrawide bandgaps semiconductors for enhanced visible light photocatalytic performance.
研究领域:
材料科学
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环境科学
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化学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Jing Liu,Min Ma,Xin Yu,Changhui Xin,Mingxue Li,Shijie Li
Constructing S-scheme charge transfer pathways is often considered to be an efficient strategy for boosting interfacial charge separation for high-performance photocatalysis, especially for ultrawide bandgap tantalum-based semiconductors. In this work, defects-mediated S-scheme ZnS 1-x quantum dots (QDs)/Ta 2 O 5-x composites decorated with Ag were prepared by the modified solvothermal and photoreduction methods and employed for visible-light photocatalytic toxic tetracycline degradation. Compared with commercial Ta 2 O 5 , pristine Ta 2 O 5-x microspheres, and ZnS 1-x QDs , the prepared Ag/ZnS 1-x /Ta 2 O 5-x -1.0% composite showed the highest visible-light photocatalytic performance, and the corresponding reaction rate constant reached as high as approximately 0.02605 min −1 , which was 5.97 times of ZnS 1-x QDs, 2.63 times of Ta 2 O 5-x , and far better than that of commercial Ta 2 O 5 . The main reactive species, photocatalytic mechanism and degradation pathways were also studied. The highly enhanced photocatalytic performance of the Ag/ZnS 1-x quantum dots/Ta 2 O 5-x composites could be mainly attributed to the formation of Ag modified S-scheme heterostructures and highly increased surface areas. Current work indicates a high-performance tantalum-based composite for dealing with persistent organic pollutants.
研究领域:
材料科学
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环境科学
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纳米技术
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光催化
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DOI
高影响因子
Journal of Materials Chemistry A
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2025
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IF 9.5
Lang Pei,Haichuan Feng,Qinan Mao,Lixiang Wang,Yu Zhang,Xin Wen,Xusheng Wang,Xiao Liu
Efficient photocatalytic CO₂ reduction necessitates optimal charge balance and proton migration between the CO₂ reduction and H₂O oxidation half-reactions. However, traditional research has predominantly focused on optimizing these half-reactions independently, neglecting potential synergistic effects. Here, this work demonstrates a photothermal catalyst of Pt/Ta2O5-x nanoplates that synergistically leverages the photothermal effect and redox dual-site cooperation to simultaneously accelerate the CO₂ reduction and H₂O oxidation, thereby maximizing proton-electron transfer. The integration of photothermal effect and photocatalysis ensures a strong driving force for CO2 conversion while accelerating proton migration, with Pt plasmonics generating localized heat from solar energy. In-situ characterizations reveal that O vacancy in Ta2O5-x enhances H2O dissociation to provide abundant protons, while Pt acts as electron acceptor sites, effectively activating the C=O bond. Theoretical calculations further illustrate the synergistic CO2 reduction and H2O oxidation on Pt and O vacancy sites, where the oxidation of *OH to *OOH is synchronized with the *CO desorption to CO, significantly lowering the energy barrier for proton-coupled electron transfer. Impressively, the Pt/Ta2O5-x exhibits exceptional photothermal catalytic performance in CO2-to-syngas conversion with a syngas yield up to 1.97 mmol g⁻¹ h⁻¹, which is 16.3-fold higher than Ta2O5-x. Furthermore, the apparent quantum efficiency reaches 3.5% at 365 nm, and the syngas selectivity is a remarkable 82%, while also exhibiting good stability.
研究领域:
催化化学
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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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Xin Yu,Jingjing Zhao,Jielin Huang,Jiawei Zhao,Yifan Guo,Yanting Tang,Xinqi Ma,Zhonghua Li,Quanhui Guo,Junwei Zhao
Harvesting broad spectral absorption and visible light photocatalysis of ultrawide bandgap semiconductors are one of most significative topics in the solar energy conversion and utilization fields. In this work, amorphous Cl-Ta 2 O 5−x microspheres were prepared by facile solvothermal method for stabilized visible light photocatalytic hydrogen generation. The acetone absorbed on the interfaces of Ta 2 O 5 nanoparticles induced the formation of oxygen vacancies , enhanced visible light absorption, and formation of Ta 2 O 5−x microspheres with preferred orientations as well as Cl doping. The Cl-Ta 2 O 5−x microspheres showed typical amorphous characteristics and obvious visible light absorption in comparison to those of commercial Ta 2 O 5 . More importantly, the prepared Cl-Ta 2 O 5−x microspheres also showed stabilized visible light photocatalytic hydrogen generation performance in the spectral regions of 400 nm ≤ λ ≤ 600 nm mainly because of the introduction of oxygen vacancy defects and Cl doping, which might significantly expand the application of tantalum oxide semiconductors in the broad spectral photocatalytic water splitting.
研究领域:
材料科学
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能源转换与利用
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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