Bi_(3)TaO_(7)/MXene纳米片异质结的制备及光催化降解磺胺嘧啶钠  

Preparation of Bi_(3)TaO_(7)/MXene Nanosheets Heterojunction for Photocatalytic Degradation of Sodium Sulfadiazine

作　　者：石丹 黄章律 严素定 王娟 王国宏 SHI Dan;HUANG Zhang-Lü;YAN Su-Ding;WANG Juan;WANG Guo-Hong(Hubei Key Laboratory of Pollutant Analysis and Reuse Technology,School of Chemistry and Chemical Engineering,Hubei Normal University,Huangshi,Hubei 435002,China)

机构地区：[1]湖北师范大学化学化工学院,污染物分析与资源化湖北省重点实验室,黄石435002

出　　处：《无机化学学报》2022年第8期1487-1498,共12页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金项目(No.22075072,52003079);湖北省自然科学基金项目(No.2021CFB569)资助

摘　　要：分别以五水合硝酸铋(Bi(NO_(3))_(3)·5H_(2)O)和五氯化钽(TaCl_(5))作为Bi源和Ta源,采用静电吸附和溶剂热法在2D Ti_(3)C_(2)的表面原位生长0D Bi_(3)TaO_(7)纳米颗粒制备Bi_(3)TaO_(7)/Ti_(3)C_(2)复合光催化材料。通过各种物理化学表征研究了2D Ti_(3)C_(2)纳米片对Bi_(3)TaO_(7)/Ti_(3)C_(2)复合光催化材料微结构的影响。通过可见光下降解磺胺嘧啶钠(SD-Na)溶液来评价所制备样品的光催化性能。实验结果表明,Bi_(3)TaO_(7)/Ti_(3)C_(2)复合材料的光催化性能明显增强。在最优条件下(Ti_(3)C_(2)与Bi_(3)TaO_(7)的质量比为0.02)制备的BT2展现出最高的光催化活性,其降解SD-Na溶液的表观速率常数是纯Bi_(3)TaO_(7)的2.8倍。Bi_(3)TaO_(7)/Ti_(3)C_(2)复合光催化材料性能的显著提高归因于Ti_(3)C_(2)/Bi_(3)TaO_(7)异质结的形成有利于光生载流子的快速转移和分离。In this work,the Bi_(3)TaO_(7)/Ti_(3)C_(2) composite photocatalysts were in-situ deposited on the surface of 2D Ti_(3)C_(2) by electrostatic adsorption and solvothermal treatment using bismuth nitrate pentahydrate and tantalum pentachloride as the Bi and Ta sources,respectively.The effects of 2D Ti_(3)C_(2) nanosheets on the microstructure of Bi_(3)TaO_(7)/Ti_(3)C_(2) were investigated by various physicochemical characterizations.The photocatalytic properties of as-prepared samples were evaluated by visible light degradation of sodium sulfadiazine(SD-Na)aqueous solution.The experimental results showed that the photocatalytic performance of the Bi_(3)TaO_(7)/Ti_(3)C_(2) composites was significantly enhanced.Under the optimal conditions(the mass ratio of Ti_(3)C_(2) to Bi_(3)TaO_(7) was 0.02),the obtained BT2 sample exhibited the highest photocatalytic activity for degrading the SD-Na aqueous solution and the apparent rate constant k value was 2.8 times higher than that of the pure Bi_(3)TaO_(7) sample.The significant improvement of the Bi_(3)TaO_(7)/Ti_(3)C_(2) composite is attributed to the formation of heterojunction structure on the interface between Ti_(3)C_(2) and Bi_(3)TaO_(7),resulting in the rapid transfer and separation of photogenerated carriers.

关 键 词：MXene纳米片 钽酸铋 光催化 磺胺嘧啶钠 

分 类 号：O643.36[理学—物理化学]