g-C3N4@N-TNA制备及其光催化降解双酚A应用

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马博雅,孔祥权,李金英,杨春维.g-C3N4@N-TNA制备及其光催化降解双酚A应用[J].,2021,61(4):

g-C3N4@N-TNA制备及其光催化降解双酚A应用

Snthesis of g-C3N4@N-TNA and its application in photocatalytic degradation of bisphenol A

DOI：10.7511/dllgxb202104001

中文关键词:光催化 TiO2纳米管 N掺杂石墨相氮化碳负载双酚A

英文关键词:photocatalysis TiO2 nanotube N doping g-C3N4 loading bisphenol A

基金项目:国家自然科学基金资助项目(5170081750)；吉林省靶向识别与光催化降解材料科技创新中心项目(20180623042TC)；吉林省教育厅项目(JJKH20200424KJJJKH20200419KJ).

作者	单位
马博雅,孔祥权,李金英,杨春维

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中文摘要:

采用电刻蚀-气氛煅烧-浸渍-煅烧法成功制备出g-C3N4负载N掺杂TiO2纳米管阵列(g-C3N4@N-TNA)光催化剂，对其进行了X-射线衍射(XRD)、扫描电子显微镜(SEM)、紫外-可见(UV-Vis)漫反射、X射线光电子能谱(XPS)、光电分析系统测试表征，并对双酚A(BPA)进行了光降解实验．结果发现，g-C3N4@N-TNA与TiO2纳米管阵列相比，光激发能级从3.03 eV下降至2.44 eV，瞬时光电流密度从0.17 μA·cm-2提高至166.27 μA·cm-2，反应80 min后BPA完全降解，其降解过程遵循准一级动力学规律．研究还获得了BPA的降解途径，酸性和碱性条件均对BPA的降解起到促进作用．

英文摘要:

The g-C3N4 loading N doping TiO2 nanotube array (g-C3N4@N-TNA) photocatalyst is synthesized by the following process: electric etching, atmosphere calcination, impregnation and calcination. The X ray diffraction (XRD), scanning electron microscope (SEM), UV visible (UV-Vis) diffuse reflectance, X ray photoelectron spectroscopy (XPS) and photoelectric analysis system are used to characterize the photocatalyst. Bisphenol A (BPA) is selected as the model pollutant to test the g-C3N4@N-TNA catalytic effect. Results show that compared with TiO2 nanotube array, the band gap of g-C3N4@N-TNA decreases from 3.03 eV to 2.44 eV, and the instantaneous photocurrent density increases from 0.17 μA·cm-2 to 166.27 μA·cm-2. The model pollutant BPA is completely degraded after 80 min of reaction. The degradation process follows the pseudo first order kinetics law. The degradation pathway is revealed. The BPA degradation efficiency can be promoted in both acidic and alkaline conditions.

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g-C3N4@N-TNA制备及其光催化降解双酚A应用

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