SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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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
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Fuming Lai,Renjing Duan,Xiaoshi Lang,Tan Wang,Tingting Qu,Lan Li,Qinzhi Lai,Kedi Cai
Lithium-sulfur batteries are considered a favourable contender for next-generation energy storage systems owing to their high energy density (2600 Wh·kg −1 ). However, the severe "shuttle effect" of polysulfides and the slow redox kinetics involving phase transitions have seriously limited the commercialization of lithium-sulfur batteries. On this basis, in this paper, a type of nanoflower structure rare-earth lanthanum ion (La 3+ ) doping Sn 3 O 4 with a large number of catalytic active interfaces is designed via a facile one-step hydrothermal method. When serves as a capture centre to immobilize polysulfides, it exhibits a strong chemical adsorption capacity. Moreover, due to the unique 4 f electron configuration of the rare-earth elements, nanoflower structure La 3+ doping Sn 3 O 4 (La@Sn 3 O 4 ) as sulfur-wrapped matrix has a strong catalytic activity, which can effectively accelerate the conversion process of polysulfides. At the same time, the catalytic mechanism of La@Sn 3 O 4 /S composite cathode material targeting the solid to liquid phase transformation of polysulfides is effectively revealed via in-situ Raman spectroscopy test and the initial discharge capacity can reach 1429.6 mAh·g −1 at a current density of 0.1 C, and the capacity retention rate is 76.5 % after 130 cycles.
研究领域:
材料科学
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能源存储技术
✓ 已验证
DOI
高影响因子
NANO
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2022
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IF 1.438
Wenquan Hu,Jia Song,Ming Wang
Sn 3 O 4 /g-C 3 N 4 heterostructure nanomaterials were prepared by calcining melamine and the hydrothermal method. The microstructure and morphology of the synthesized specimen were characterized by X-ray diffraction (XRD), electron microscope (SEM and TEM) and nitrogen adsorption and desorption (BET). The photocatalytic activity was evaluated by the photodegradation of methylene blue (MB) under visible light irradiation and the electrochemical performance was tested under a typical three-electrode configuration. The results show that the Sn 3 O 4 /g-C 3 N 4 heterojunctions exhibit more superior photocatalytic performance for degrading MB compared with single Sn 3 O 4 and g-C 3 N 4 . The degradation rate of MB reaches up to a maximal 90.30% within 75 min, which is far higher than that of Sn 3 O 4 (61.30%). It is attributed to the effective interfacial contact between Sn 3 O 4 and g-C 3 N 4 , which increases charge transfer and prolongs electron-hole separation time. The specific capacitance of Sn 3 O 4 /g-C 3 N 4 is 28.6% higher than that of Sn 3 O 4 due to the formation of a heterostructure.
研究领域:
材料科学
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纳米技术
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光催化
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电化学
✓ 已验证
DOI
高影响因子
Molecular Catalysis
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2023
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IF 4.6
Hele Liu,Pengfei Tan,Lu Yang,Mingyuan Zhang,Jiaoyang Chen,Ruifeng Ren,Huanhuan Zhai,Tiangui Qi,Jun Pan
Improving photocatalytic activity is crucial for promoting photocatalytic hydrogen production. Element doping is a feasible strategy to accelerate carrier separation and migration rate. Herein, a simple one-pot hydrothermal process was used to create In doped Sn 3 O 4 composite photocatalyst. It was demonstrated that the addition of In considerably raises the concentration of oxygen vacancy , which provides more unsaturated active sites, thus regulating the photocatalyst's electronic structure and surface properties, and promoting the carrier migration efficiency. Meanwhile, the light absorption range of samples after doping is redshifted, and the light absorption capacity is enhanced, which effectively improves the photocatalytic activity. Due to this, the optimal sample's average hydrogen production under visible light reached 22.83 μmol g −1 h −1 , 4.5 folds more than that of Sn 3 O 4 , and shown good stability. This research presents a novel approach for the development of metal oxide photocatalyst with excellent activity and durability.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY
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2025
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IF 9.4
Jing Fan,Liang Guo,Nan He,Fenhong Song
Utilizing solar energy for photocatalytic hydrogen production provides a promising pathway for sustainable energy conversion. However, the traditional photocatalyst has the defects of excessive charge recombination speed and poor stability. In this work, a series of Si-Sn 3 O 4 /g-C 3 N 4 heterojunction catalysts were synthesized via a facile ultrasonic-assisted thermal treatment method. The optimized Si-Sn 3 O 4 -5/CN composite exhibited a remarkable hydrogen evolution rate of 5295 μmol∙g −1 h −1 under visible light, which is 2.21 and 54 times higher than that of pure g-C 3 N 4 and Si-Sn 3 O 4 , respectively. Extensive characterization (XPS, PL, EIS, etc.) confirmed the formation of a Type-II heterojunction, which significantly promotes charge separation and transfer. Furthermore, the composite demonstrated excellent photocatalytic stability over four consecutive cycles. This work offers an efficient and stable photocatalyst system for solar-driven hydrogen production and sheds light on the design of heterostructured photocatalysts.
研究领域:
材料科学
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光催化
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可再生能源
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纳米技术
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环境科学
✓ 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）