破乳法合成N掺杂TiO2/粉煤灰及其可见光催化性能研究

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (1): 304-311.

所属专题：新型功能材料

破乳法合成N掺杂TiO₂/粉煤灰及其可见光催化性能研究

胡凯强, 赖声发, 钱艳峰, 张甜甜, 乔佳乐, 万祥龙

安徽理工大学材料科学与工程学院,淮南 232001

收稿日期:2020-08-16 修回日期:2020-09-26 出版日期:2021-01-15 发布日期:2021-02-07
通讯作者: 万祥龙,博士,副教授。E-mail:xlwan@aust.edu.cn
作者简介:胡凯强(1995—),男,硕士研究生。主要从事煤基固废资源化利用方面的研究。E-mail:543820761@qq.com
基金资助:
安徽理工大学环境友好材料与职业健康研究院(芜湖)研发专项(ALW2020YF12,ALW2020YF15);安徽省高校科学自然基金(KJ2019A0118);2018年度大学生创新创业计划(201810361279);2019年度大学生创新创业计划(201910361067);2020年度大学生创新创业计划(202010361081)

Synthesis of N-Doped TiO₂/Fly Ash Composites by DemulsificationMethod and Its Visible Light Catalytic Performance

HU Kaiqiang, LAI Shengfa, QIAN Yanfeng, ZHANG Tiantian, QIAO Jiale, WAN Xianglong

School of Materials Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China

Received:2020-08-16 Revised:2020-09-26 Online:2021-01-15 Published:2021-02-07

摘要/Abstract

摘要： 粉煤灰表面负载TiO₂制备光催化材料是粉煤灰高附加值资源化应用的一种新途径,通过破乳的方法在粉煤灰表面负载TiO₂是一种新的尝试。以十二烷基苯磺酸钠改性的粉煤灰为载体,纳米TiO₂胶体为钛源,NaOH为破乳剂,尿素为氮源,在反应釜中通过破乳的方法成功合成了N掺杂的TiO₂/粉煤灰复合材料。通过扫描电子显微镜(SEM)、X射线衍射仪(XRD)、红外光谱仪(FT-IR)及紫外可见漫反射光谱仪(UV-Vis DRS)等测试手段对合成的产物进行了表征,测试了光催化材料对罗丹明B可见光催化降解的效果。结果表明,当TiO₂与粉煤灰的质量比为1∶1,尿素的添加量为0.5 g时,制备的N-TiO₂/粉煤灰光催化剂在可见光下对罗丹明B有很好的降解效果,180 min可以降解96.98%的罗丹明B,且降解过程符合一级动力学模型,循环利用6次仍具有很好的稳定性和重复性。该方法为高附加值资源化粉煤灰提供一种功能化的应用方案,具有良好的应用前景。

关键词: 纳米TiO₂溶胶, 破乳法, N掺杂TiO₂/粉煤灰, 可见光降解, 罗丹明B

Abstract: The preparation of photocatalytic materials by loading TiO₂ on the surface of fly ash is a new way for high-value applications of fly ash.Loading TiO₂ on the surface of fly ash by demulsification method is a new attempt.Using fly ash modified with sodium dodecylbenzene sulfonate acted as the carrier,nano TiO₂ sol acted as the titanium source,NaOH used as the demulsifier,and urea acted as the nitrogen source,N-doped TiO₂/fly ash composite material was successfully synthesized in the reactor by the demulsification method.The products were characterized by scanning electron microscope (SEM),X-ray diffractometer (XRD),infrared spectrometer (FT-IR),and ultraviolet-visible diffuse reflectance spectrometer (UV-Vis DRS). The effect of photocatalytic materials on the visible light catalytic degradation of rhodamine B was tested.The results show that when the mass ratio of TiO₂ to fly ash is 1∶1 and the addition amount of urea is 0.5 g,the N-TiO₂/fly ash photocatalyst has a good degradation effect on rhodamine B under visible light. 96.98% of rhodamine B is degraded in 180 min and the degradation process conforms to the model of first-order kinetics reaction,it still has good stability and repeatability after 6 times of cycling utilization.This method provides a functional application scheme for high-value applications of fly ash and has a good application prospect.

Key words: nano TiO₂ sol, demulsification method, N-doped TiO₂/fly ash, visible light degradation, rhodamine B

中图分类号:

TQ637

胡凯强, 赖声发, 钱艳峰, 张甜甜, 乔佳乐, 万祥龙. 破乳法合成N掺杂TiO₂/粉煤灰及其可见光催化性能研究[J]. 硅酸盐通报, 2021, 40(1): 304-311.

HU Kaiqiang, LAI Shengfa, QIAN Yanfeng, ZHANG Tiantian, QIAO Jiale, WAN Xianglong. Synthesis of N-Doped TiO₂/Fly Ash Composites by DemulsificationMethod and Its Visible Light Catalytic Performance[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(1): 304-311.

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破乳法合成N掺杂TiO₂/粉煤灰及其可见光催化性能研究

Synthesis of N-Doped TiO₂/Fly Ash Composites by DemulsificationMethod and Its Visible Light Catalytic Performance

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