| 多孔超薄g-C3N4纳米片负载Pt复合材料的制备及其光催化性能 | |
| Preparation and Photocatalytic Activity of Holey Ultrathin g-C3N4 Nanosheets-Supported Pt Composite | |
| 摘要: 以三聚氰胺为前驱体，通过热氧化刻蚀法制备多孔超薄g-C3N4纳米片（CNHS），将其与氯铂酸钾溶液混合后采用原位光化学还原法成功制备了CNHS负载Pt光催化剂（Pt-CNHS）。使用粉末X射线衍射、场发射扫描电子显微镜、X射线光电子能谱、透射电子显微镜、紫外可见漫反射光谱和N2吸附-脱附测试等技术对所制备样品的结构、形貌、光吸收特性、光电化学性能和比表面积等进行系统分析。并以气相甲苯为目标降解物，研究其光催化性能。结果表明，相对于体相g-C3N4（CNB）和CNHS，Pt的引入可以有效增强催化剂对可见光的吸收能力、响应范围及载流子分离效率。与纯g-C3N4和CNHS相比，Pt-CNHS在紫外和可见光照射下均表现出更高的光催化降解气相甲苯的活性。此外，也对Pt-CNHS光催化剂在可见光照射下降解气相甲苯的反应历程做了初步研究。 | |
| 关键词: g-C3N4 负载型催化剂 光催化 降解 甲苯 | |
| 基金项目: 国家自然科学基金（No.21808019，41772240）、江苏省自然科学基金（No.BK20181048，BK20180958）和常州科技计划（No.CJ20190074）资助。 | |
| Abstract: Holey ultrathin g-C3N4 nanosheets (CNHS) were prepared by thermal oxidation etching method with melamine as the precursor, and Pt-CNHS photocatalyst was synthesized via a facile in-situ photochemical reduction of CNHS and K2PtCl6. The X-ray diffraction, field emission scanning electron microscope, X-ray photoelectron spectroscopy, transmission electron microscope, UV-Vis diffuse reflection spectroscopy and N2 adsorption-desorption measurements were used to investigate the structure, morphology, optical absorption characteristics,photoelectrochemical properties and specific surface area of the products. The photocatalytic performance of the catalyst was studied by degrading gaseous toluene under UV and visible light. The results show that the introduction of Pt can effectively enhance the visible light absorption capacity, response range and carrier separation efficiency of the catalyst. Compared with bulk g-C3N4 (CNB) and CNHS, the Pt-CNHS composite displayed much higher photocatalytic activities in gaseous toluene degradation under UV-and visible-light irradiation. In addition, a preliminary study was made on the reaction process of Pt-CNHS photocatalyst to degrade gaseous toluene under visible light. | |
| Keywords: g-C3N4 supported catalysts photocatalysis degradation toluene | |
| 投稿时间：2021-01-23 修订日期：2021-05-12 | |
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| 马帅帅,顾建东,高媛,宗玉清,薛金娟,叶招莲.多孔超薄g-C3N4纳米片负载Pt复合材料的制备及其光催化性能[J].无机化学学报,2021,37(8):1439-1448. | |
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