PDF《微量 Ag3PO4 改性 g-C3N4 的可见光催化活性研究》

第36 卷第期河北科技大学学报Vol.

36, No.

2015 年月Journal of Hebei University of Science and Technology

2015 收稿日期:2014- 11-29 ;

修回日期:2015-01-19;

责任编辑:张士莹 基金项目:国家自然科学基金(21271061) ;

河北省自然科学基金(B2014208103) 作者简介:张鑫鑫(1988-),女,河北灵寿人,硕士研究生,主要从事可见光催化材料方面的研究. 通信作者:王德松教授.E-mail: wangdesong@126.com wangdesong@hebust.edu.cn 张鑫鑫,徐莉,李磊,等. 微量 Ag3PO4 改性 g-C3N4 的可见光催化活性研究[J].河北科技大学学报,2015,36(0) :000-000. ZHANG Xinxin,XU Li,LI Lei,et al. Study on visible-light photocatalytic activity of g-C3N4 modified by trace Ag3PO4[J].Journal of Hebei University of Science and Technology,2014,36(0) :000-000. 微量 Ag3PO4 改性 g-C3N4 的可见光催化活性研究 张鑫鑫,徐莉,李磊,罗青枝,王德松 (河北科技大学化学与制药工程学院,河北石家庄 050018) 摘要:采用一种简易方法制备了较低 Ag3PO4 含量的 Ag3PO4/g-C3N4 复合可见光催化剂,采用 X 射线 衍射(XRD) 、傅里叶变换红外光谱(FT-IR)、透射电子显微镜(TEM) 、扫描电子显微镜(SEM) 、紫外 可见漫反射光谱(UV-vis DRS) 、荧光光谱(PL)和X射线光电子能谱(XPS)等对 Ag3PO4/g-C3N4 进 行了系统分析与表征.通过在 Ag3PO4/g-C3N4 存在条件下甲基橙的光降解反应,考察该催化剂的可见光 催化活性.结果表明,所制备的复合材料中确实存在 Ag3PO4,Ag3PO4 的引入对 g-C3N4 晶型结构没有明 显的影响, 但显著提高了其在可见光区的吸收能力和光生电子/空穴对的分离效率, 提高了其可见光催化 活性. 关键词:催化化学;

光催化剂;

Ag3PO4;

g-C3N4;

改性;

光催化 中图分类号:O649.4 文献标志码:A Study on visible-light photocatalytic activity of g-C3N4 modified by trace Ag3PO4 ZHANG Xinxin,XU Li,LI Lei,LUO Qingzhi,WANG Desong (School of Chemistry and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang,Hebei 050018, China) Abstract: Novel polymeric g-C3N4 photocatalysts modified by trace Ag3PO4 were prepared via a facile method. The obtained Ag3PO4/g-C3N4 composite products were characterized by X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflection spectroscopy (DRS) and photoluminescence spectroscopy (PL). The photocatalytic activities of Ag3PO4/g-C3N4 samples were investigated by evaluating the decomposition of methyl orange (MO) under visible light irradiation. The results revealed that the polymeric material was doped by Ag3PO4, the Ag3PO4 doping can hardly affect the crystallinity of the as-prepared g-C3N4 materials, while can greatly improve their visible light absorption and separation efficiency of photogenerated electron/hole pairs. The Ag3PO4/g-C3N4 photocatalysts exhibited significantly enhanced photocatalytic performance for the degradation of methyl orange compared with pure g-C3N4. Keywords: catalytic chemistry;

photocatalyst;

Ag3PO4;

g-C3N4;

modification;

photocatalysis 文章编号:1008-1542(2015)00-0001-00 doi:10.7535/hbkd.2015yx

2015 年河北科技大学学报第36 卷 制备具有高量子效率和催化性能的光催化剂是材料研究领域的主要内容之一.在过去的几十年,许多无 机材料,如氧化物[1-4] 、硫化物[5-6] 和氮氧化物[7-8] 等,已经被作为光催化剂应用于紫外或可见光照射下的制氢 和环境净化.1972 年,FUJISHIMA 和HONDA[9] 第1次发现了二氧化钛能在可见光照射下分解水制氢,使得 半导体催化剂引起了人们的广泛关注,且被认为是最有前景的降解污染物和制氢的技术[10-12] .