化工新型材料

化工新型材料 ›› 2019, Vol. 47 ›› Issue (10) : 110-114.

新材料与新技术

纳米棒状Ag₃PO₄/TiO₂异质结复合材料的可见光催化性能

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Nanorod-like Ag₃PO₄/TiO₂ heterojunction semiconductor composite with efficient photodegradation property under visible-light

Huang Fengping¹, Liu Boxue¹, Guo Yuyu¹, Xin Meng¹, Cui Mengli¹, Zhou Xinmin¹, Ding Li²

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Received		Published
2018-05-25		2019-10-20
Issue Date	Revised Date
2019-11-09	2018-05-25

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摘要

采用水热法制备了一维棒状TiO₂纳米材料,再通过原位生长法合成了棒状纳米Ag₃PO₄/TiO₂复合材料,制备了不同摩尔量的纳米棒状Ag₃PO₄/TiO₂异质结复合材料。通过X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、X射线光电子能谱仪(XPS)、漫反射紫外-可见近红外光谱仪(UV-Vis-DRS)和电化学阻抗谱(EIS)对纳米棒状Ag₃PO₄/TiO₂异质结复合材料的晶体结构、形貌、光吸收特性和电子复合情况等进行了表征,并在可见光照射下研究了甲基橙和苯酚的光降解率。结果表明:制备的纳米棒状TiO₂具有更大的比表面积,为纳米Ag₃PO₄的负载提供更多的活性位点,提高了光利用效率;Ag₃PO₄/TiO₂复合材料有异质结的形成,其内建电场可有效提高电子-空穴对的分离效率,进而提高材料的光催化性能和稳定性。

Abstract

Nanorods Ag₃PO₄/TiO₂ heterojunction nanoparticles were synthesized through a in situ growth method after one-dimensional nanorod TiO₂ nanomaterials prepared by hydrothermal method.The crystal structure,morphology,light absorption and electron recombination of Ag₃PO₄/TiO₂ were characterized by XRD,SEM,TEM,XPS,UV-Vis-DRS and EIS.The photodegradation of Methyl orange (MO) and phenol were investigated under visible light irradiation.Nanorod-like Ag₃PO₄/TiO₂ heterojunction composites with different molar amounts were prepared.The experimental results shown that the prepared nano-rod TiO₂ had a larger specific surface area,provided more active sites for the loading of nano-Ag₃PO₄,and improved the light utilization efficiency.Ag₃PO₄/TiO₂ had the formation of heterojunctions.The built-in electric field effectively improved the separation efficiency of electron-hole pairs.

关键词

TiO₂ / Ag₃PO₄ / 光催化 / 异质结 / 原位生长法

Key words

TiO₂ / Ag₃PO₄ / photocatalysis / heterojunction / in situ growth method

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纳米棒状Ag₃PO₄/TiO₂异质结复合材料的可见光催化性能[J]. 化工新型材料, 2019, 47(10): 110-114 DOI:

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