宽光谱响应的介孔rGO/TiO2空心块体制备及光催化性能

兰州理工大学学报 ›› 2020, Vol. 46 ›› Issue (1): 32-36.

宽光谱响应的介孔rGO/TiO₂空心块体制备及光催化性能

李翠霞, 史晓, 孙会珍, 王慧康, 康伟超

兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室, 甘肃兰州 730050

收稿日期:2019-01-21 出版日期:2020-02-28 发布日期:2020-06-23
作者简介:李翠霞(1972-),女,河北卢龙人,副教授.
基金资助:
国家自然科学基金(511764039)

Preparation of mesoporous rGO/TiO₂hollow blocks with wide spectral response and photocatalytic performance related with them

LI Cui-xia, SHI Xiao, SUN Hui-zhen, WANG Hui-kang, KANG Wei-chao

Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou Univ. of Tech. , Lanzhou 730050, China

Received:2019-01-21 Online:2020-02-28 Published:2020-06-23

摘要/Abstract

摘要： 以钛酸四丁酯(TBT)、氧化石墨烯(GO)为原料,酵母菌为空腔模板剂,柠檬酸为水解抑制剂和介孔模板剂,采用溶胶-凝胶法原位合成介孔GO/TiO₂空心块体材料(GO/TiO₂),通过紫外灯辐照还原得到rGO/TiO₂.利用XRD、SEM、BET、PL表征手段对样品进行分析,研究酵母菌的引入对rGO/TiO₂降解盐酸四环素性能的影响.结果表明:样品为介孔空心块体结构,其比表面积为50.66 m²/g,以4.3 nm的介孔为主;酵母菌的加入可抑制催化剂光生电子-空穴对的复合,并拓宽其光谱响应范围,提高光催化性能;当酵母菌质量分数为5%时,rGO/TiO₂的催化性能达到最佳水平,在可见光及紫外光条件下,盐酸四环素的降解率分别达到84.97%、96.96%.

关键词: 还原氧化石墨烯, TiO₂, 酵母菌, 空心块体, 光催化性能

Abstract: Mesoporous graphene oxide/TiO₂ hollow bulk materials were synthesized in-situ with Sol-Gel method, by taking tetrabutyl titanate (TBT) and graphene oxide(GO) as raw materials, yeast as cavity template agent and citric acid as hydrolysis inhibitor and mesoporous template agent, and then the reduced graphene oxide/TiO₂ (rGO/TiO₂) bulk materials were obtained by means of ultraviolet radiation reduction. The samples were analyzed by means of various characterization means such as X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) and photoluminescence (PL) and the effect of yeast addition on degradation of tetracycline hydrochloride with rGO/TiO₂ was studied. It was shown by experimental result that rGO/TiO₂ would be mesoporous bulk materials with specific surface area of 50.66 m²/g and mesopores size of 4.3 nm in majority. The addition of yeast could effectively inhibit the recombination of the photo-generated electron-hole pair of catalyst, broaden the spectral response range and improve the photocatalytic performance. When the mass fraction of yeast was 5%, the catalytic performance of rGO/TiO₂ would reach optimal level. Under visible light and ultraviolet light, the degradation rate of tetracycline hydrochloride would reach 84.97% and 96.96%, respectively.

Key words: reduced graphene oxide, titanium dioxide, yeast, hollow block, photocatalytic performance

中图分类号:

TB34

李翠霞, 史晓, 孙会珍, 王慧康, 康伟超. 宽光谱响应的介孔rGO/TiO₂空心块体制备及光催化性能[J]. 兰州理工大学学报, 2020, 46(1): 32-36.

LI Cui-xia, SHI Xiao, SUN Hui-zhen, WANG Hui-kang, KANG Wei-chao. Preparation of mesoporous rGO/TiO₂hollow blocks with wide spectral response and photocatalytic performance related with them[J]. Journal of Lanzhou University of Technology, 2020, 46(1): 32-36.

参考文献

[1] HAO R,XIAO X,ZUO X,et al.Efficient adsorption and visible-light photocatalytic degradation of tetracycline hydrochloride using mesoporous BiOI microspheres [J].Journal of Hazardous Materials,2012,209-210(1):137-145.
[2] HASHIMOTO K,IRIE H,FUJISHIMA A.TiO₂ photocatalysis: Ahistorical overview and future prospects [J].Japanese Journal of Applied Physics,2005,44(12):8269-8285.
[3] 李翠霞,杨轩,谭高玮,等.WO₃/TiO₂-rGO复合材料的制备及其光催化性能 [J].兰州理工大学学报,2017,43(3):25-29.
[4] WARKHADE S K,GAIKWAD G S,ZODAPE S P,et al.Low temperature synthesis of pure anatase carbon doped titanium dioxide:An efficient visible light active photocatalyst [J].Materials Science in Semiconductor Processing,2017,63:18-24.
[5] WANG J,ZHU W,ZHANG Yinqing,et al.An efficient two-step technique for nitrogen-doped titanium dioxide synthesizing:Visible-light-induced photodecomposition of methylene blue [J].Journal of Physical Chemistry C,2007,111(2):1010-1014.
[6] LIU Y.Hydrothermal synthesis of TiO₂-RGO composites and their improved photocatalytic activity in visible light [J].RSC Advances,2014,4(68):36040-36045.
[7] TANG C,LIU L,LI Y,et al.Aerosol spray assisted assembly of TiO₂ mesocrystals into hierarchical hollow microspheres with enhanced photocatalytic performance [J].Applied Catalysis B Environmental,2017,201:41-47.
[8] AN G,YANG C,JIN S,et al.Samenvatting hollow TiO₂:Sm³⁺ spheres with enhanced photoluminescence fabricated by a facile method using polystyrene as template [J].Journal of Materials Science,2013,48(16):5483-5488.
[9] CHEN J,WANG D,QI J,et al.Monodisperse hollow spheres with sandwich heterostructured shells as high-performance catalysts via an extended SiO₂ template method [J].Small,2015,11(4):420-425.
[10] SHEN W,ZHU Y,DONG X,et al.A new strategy to synthesize TiO₂-hollow spheres using carbon spheres as template [J].Cheminform,2005,34(6):840-841.
[11] MU G,WEI Q,HUANG Y.Facile fabrication of CeO₂ hollow microspheres with yeast as bio-templates [J].Journal of Rare Earths(JRE),2015,33(12):1329-1334.
[12] CHEN Y,WANG C,BAI B,et al.Fabrication of TiO₂ hollow spheres using yeast as bio-templates and their photocatalytic performance for the degradation of CBW wastewater [C]//International Conference on Bioinformatics & Biomedical Engineering.[s.n.]:IEEE,2010.
[13] BECERRIL H A,MAO J,LIU Z,et al.Evaluation of solution-processed reduced graphene oxide films as transparent conductors [J].Acs Nano,2008,2(3):463-470.
[14] DING Z,LU G Q,GREENFIELD P F.Role of the crystallite phase of TiO₂,in heterogeneous photocatalysis for phenol oxidation in water [J].Journal of Physical Chemistry B,2000,104(19):4815-4820.
[15] 张昔玉,葛圣松,邵谦,等.酵母菌模板法制备CeO₂空心微球及其光催化性能 [J].无机化学学报,2016,32(9):1535-1542.
[16] STORCK S,BRETINGER H,MAIER W F.Characterization of micro-and mesoporous solids by physisorption methods and pore-size analysis [J].Applied Catalysis A General,1998,174(1/2):137-146.
[17] HU Y,ZHANG J,MINAGAWA M,et al.The origin of the decline in the photocatalytic activity of TiO₂ in the decomposition of NO:TPD spectra of the adsorbed NO species [J].Research on Chemical Intermediates,2003,29(2):125-135.
[18] SHI Y,HU Y,ZHANG L,et al.Palygorskite supported BiVO₄ photocatalyst for tetracycline hydrochloride removal [J].Applied Clay Science,2017,137:249-258.

宽光谱响应的介孔rGO/TiO₂空心块体制备及光催化性能

Preparation of mesoporous rGO/TiO₂hollow blocks with wide spectral response and photocatalytic performance related with them

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