Photocatalytic activity of Sr-doped LaCoO3 under UV illumination

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Author

  • Do Van Phuong; Trương Lê Bích Trâm;TS. Lê Minh Viễn*

Từ khóa:

Perovskite
photocatalyst
sol-gel method
degradation
CO2 reduction reaction
methylene blue
methane

Tóm tắt

The structured perovskite photocatalysts La1-xSrxCoO3 (x = 0, 0.2, 0.4, 0.6, 0.8) were successfully prepared by sol-gel method. Some characterization techniques, such as XRD, SEM, TEM, UV-vis diffuse reflection spectroscopy, and Brumauer – Emmett – Teller (BET) were used to verify the structure and physio-chemical properties of catalysts. In addition, the effect of La1-xSrxCoO3 powders on the photocatalytic degradation of methylene blue and CO2 reduction reaction under UV light source was also investigated. The results showed a maximum photocatalytic degradation of methylene blue 30 ppm could be achieved with a degradation degree of 11.32 % by La0.6Sr0.4CoO3 synthesized at 850 oC for 4h (LSC64-850) in UV light for 150 min. Moreover, the photocatalytic results of CO2 reduction reaction indicated that LSC64-850 catalyst had the methane yield of 12.27 µmol/g cat. which was higher than that of undoped LaCoO3, 1.78 µmol/g cat..

Tài liệu tham khảo

    [1] Chunqiu Zhang, Hongcai He, Ning Wang, Haijun Chen, Deting Kong, Visible-light sensitive La1-xBaxCoO3 photocatalyst for malachite green degradation, Ceramics International 39, pp. 3685 – 3689, 2013.
    [2] Hung-Yu Wu, Hsunling Bai and Jeffrey C. S. Wu, Photocatalytic reduction of CO2 using Ti-MCM-41 photocatalysts in monoethanolamine solution for methane production, Ind. Eng. Chem. Res 53, pp. 11221-11227, 2014.
    [3] A. Fujishima, K. Honda, Electrochemical photolysis of water at a semiconductor electrode, Nature 238, pp. 37-38, 1972.
    [4] M.-C. Wang, H.-J. Lin, C.-H. Wang, H.-C. Wu, Effects of annealing temperature on the photocatalytic activity of N-doped TiO2 thin films, Ceramics International 38, pp. 195-200, 2012.
    [5] S. Suwanboon, P. Amornpitoksuk, N. Muensit, Dependence of photocatalytic activity on the structural and optical properties of nanocrystalline ZnO powders, Ceramics International 37, pp. 2247-2253, 2011.
    [6] Michael R. Hoffmann, Scot T. Martin, Wonyong. Choi, Detlef W. Bahnemann, Environmental applications of semiconductor photocatalysis, Chem. Rev. 95 (1), pp. 69-96, 1995.
    [7] Qizhao Wang, Jiajia Li, Yan Bai, Juhong Lian, Haohao Huang, Zhimin Li, Ziqiang Lei, Wenfeng Shangguan, Photochemical preparation of Cd/CdS photocatalysts and their efficient photocatalytic hydrogen production under visible light irradiation, Green Chem. 16, pp. 2728, 2014.
    [8] Shasha Fu, Helin Niu, Zhiyin Tao, Jiming Song, Changjie Mao, Shengyi Zhang, Changle Chen, Dong Wang, Low temperature synthesis and photocatalytic property of perovskite-type LaCoO3 hollow spheres, Journal of Alloys and Compounds 576, pp. 5-12, 2013.
    [9] Yang Liu, Lei Xie, Yan Li, Rong Yang, Jianglan Qu, Yaoqi Li, Xingguo Li, Synthesis and high photocatalytic hydrogen production of SrTiO3 nanoparticles from water splitting under UV irradiation, Journal of Power Sources 183, pp. 701-707, 2008.
    [10] Bahman Seyfi, Morteza Baghalha, Hossein Kazemian, Modified LaCoO3 nano-perovskite catalysts for the environmental application of automotive CO oxidation, Chemical Engineering Journal 148, pp. 306-311, 2009.
    [11] Peisong Tang, Yi Tong, Haifeng Cheng, Feng Cao, Guoxiang Pan, Microwave-assisted synthesis of nanoparticulate perovskite LaFeO3 as a high active visible-light photocatalyst, Current Applied Physics 13, pp. 340-343, 2013.
    [12] Jin Suntivich, Kevin J. May, Hubert A. Gasteiger, John B. Goodenough, Yang Shao-Horn, A perovskite oxide optimized for oxygen evolution catalysis from molecular orbital principles, Science 334, 1383, 2011.
    [13] E. García – López, G. Marcì, F. Puleo, V. La Parola, L.F. Liotta, La1-xSrxCo1-yFeyO3-δ perovskites: Preparation, characterization and solar photocatalytic activity, Applied Catalysis B: Environmetal, 2014.
    [14] Zhaoqiang Li, Ming Meng, Fangfang Dai, Tiandou Hu, Yaning Xie, Jing Zhang, Performance of K and Ni substituted La1-xKxCo1-yFeyO3-δ perovskite catalysts used for soot combustion, NOx storage and simultaneous NOx-soot removal, Fuel 93, pp. 606-610, 2012.
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Jun 30, 2015
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Cách trích dẫn
Do Van Phuong; Truong Le Bich Tram;Le Minh Vien*. “Photocatalytic Activity of Sr-Doped LaCoO3 under UV Illumination”. Tạp Chí Khoa học Và Công nghệ - Đại học Đà Nẵng, vol 6, số p.h 91, Tháng Sáu 2015, tr 42-45, https://jst-ud.vn/jst-ud/article/view/2610.

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