标题:Synthesis of Ag/AgCl-modified TiO2/MgAl-layered double hydroxide nanocomposite with enhanced photocatalytic activity
作者:Wang, Luyao; Gao, Xue; Su, Jixin; Zhang, Qiyan; Zheng, Kai; Zhang, Zhixuan
作者机构:[Wang, Luyao; Gao, Xue; Su, Jixin; Zhang, Qiyan; Zheng, Kai; Zhang, Zhixuan] Shandong Univ, Sch Environm Sci & Engn, Qingdao 266237, Shandong, Peoples 更多
通讯作者:Su, JX
通讯作者地址:[Su, JX]Shandong Univ, Sch Environm Sci & Engn, Qingdao 266237, Shandong, Peoples R China.
来源:JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
出版年:2019
卷:383
DOI:10.1016/j.jphotochem.2019.111973
关键词:Photocatalysis; Titanium dioxide modification; Gaseous toluene; Surface; plasmon resonance; Kinetics
摘要:A novel composite photocatalyst Ag/AgCl-modified TiO2/MgAl-layered double hydroxide (denominated as Ag/AgCl@TiO2-LDH) was synthesized via a combination of deposition-precipitation process and photoreduction method by using layered double hydroxide (LDH) platelets as substrate materials. The structure, morphology, and property of as-synthesized Ag/AgCl@TiO2-LDH were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller method (BET), UV-vis diffuse reflectance spectroscopy, etc. The photocatalytic property of Ag/AgCl@TiO2-LDH was tested for degradation of gaseous toluene under simulated sunlight irradiation. The composite catalyst exhibited an enhanced photodegradation activity with 92% of gaseous toluene being degraded. Through kinetics analysis, all degradation processes of gaseous toluene could be properly described by the pseudo-first-order kinetic model. The reaction rate constant of 40 mg Ag/AgCl@TiO2-LDH for the degradation of 172.05 mg m(-3) gaseous toluene is 0.026 min(-1). Furthermore, the catalyst could be reused for five cycles without obvious reduction in activity. The enhanced photocatalytic activity of Ag/AgCl@TiO2-LDH is attributed to sufficient hydroxide ions in LDH, the Shottky barrier at the metal-semiconductor interface, and surface plasma resonance of Ag/AgCl. The cooperative effect among components separate photogenerated electrons and holes effectively and thus improve the photodegradation efficiency.
收录类别:SCOPUS;SCIE
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85069956708&doi=10.1016%2fj.jphotochem.2019.111973&partnerID=40&md5=a6b2cf54574683ca36a8923d20b85a01
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