凹凸棒土/g⁃C_(3)N_(4)⁃Pt/聚苯胺复合材料的制备及其可见光催化性能  

Attapulgite/g⁃C_(3)N_(4)⁃Pt/Polyaniline Composites:Preparation and Visible Light Photocatalytic Properties

作　　者：丁维朴 李建达 陈书雯 李祥国 王庆 贺爱勇 殷竟洲[1] DING Wei‑Pu;LI Jian‑Da;CHEN Shu‑Wen;LI Xiang‑Guo;WANG Qing;HE Ai‑Yong;YIN Jing‑Zhou(Jiangsu Key Laboratory for Low-Dimension Materials,School of Chemistry and Chemical Engineering,Huaiyin Normal University,Huaian,Jiangsu 223300,China;School of Environment,Hohai University,Nanjing 210098,China)

机构地区：[1]淮阴师范学院化学化工学院,江苏省低维材料化学重点实验室,淮安223300 [2]河海大学环境学院,南京210098

出　　处：《无机化学学报》2022年第2期253-260,共8页Chinese Journal of Inorganic Chemistry

基　　金：江苏省重点研发项目(社会发展)(No.BE2020772);江苏省高等学校自然科学研究重大项目(No.20KJA430008,18KJBA150002);面上项目(No.18KJB416003);江苏省高校大学生创新计划(No.202010323006Z)资助。

摘　　要：石墨氮化碳(g⁃C_(3)N_(4))是一种窄带隙的n型半导体材料,具有可见光降解有机污染物能力;凹凸棒土(ATP)具有很强的表面活性和吸附能力,可作为催化剂的载体。我们以g⁃C_(3)N_(4)和ATP杂化材料(ATP/g⁃C_(3)N_(4))为基础,通过简单的化学还原法将纳米Pt颗粒沉积到ATP/g⁃C_(3)N_(4)表面,随后利用纳米金属Pt颗粒催化苯胺无电聚合,促使聚苯胺(PANI)在ATP/g⁃C_(3)N_(4)表面或孔道中原位生成,获得ATP/g⁃C_(3)N_(4)‑Pt/PANI复合材料。以阴离子染料甲基橙(MO)为模型体系,考察了复合材料的可见光催化性能。研究表明,共轭结构的PANI和g⁃C_(3)N_(4)在复合材料中保持完好,说明其具有良好的兼容性。由于多组分材料之间的协同效应,使得ATP/g⁃C_(3)N_(4)‑Pt/PANI纳米复合材料具有卓越的光催化性能。可见光光照80 min后,对20 mg·L^(-1) MO溶液的降解率达96.3%,而且循环5次后,其降解率仍保持在93.5%。Graphitic carbon nitride(g⁃C_(3)N_(4)),an n‑type semiconductor with a narrow bandgap of 2.7 eV,has been widely studied as a visible light‑driven photocatalyst for organic pollutant degradation,while attapulgite exhibits strong surface activity and adsorption capacity and can be used as support for catalysts.Herein,the hybrid material of graphite phase carbon nitride and attapulgite(ATP/g⁃C_(3)N_(4))were chosen as the basis of polyaniline(PANI),and ATP/g⁃C_(3)N_(4)‑Pt/PANI was successfully prepared by depositing Pt nanoparticles onto the surface of ATP/g⁃C_(3)N_(4) via a simple reduction reaction,followed by the polymerization of aniline on the surface or into the channels of ATP/g⁃C_(3)N_(4)‑Pt using Pt nanoparticles as a catalyst in acid solution.Methyl orange(MO),a kind of anionic dye,was used as the model system to investigate the visible light photocatalytic activity of the obtained products.The results showed that conjugated structures of PANI and g⁃C_(3)N_(4) were well maintained in the hybrid,implying good compatibility.The photocatalyst showed remarkable visible‑light photoactivity because of the synergistic effect between multicomponent materials.The degradation rate of 20 mg·L^(-1) MO solution was achieved to 96.3%within 80 min by using ATP/g⁃C_(3)N_(4)‑Pt/PANI as the photocatalyst,and it remained at 93.5%after five cycles.

关 键 词：石墨相氮化碳 凹凸棒土 纳米铂 聚苯胺 可见光催化 

分 类 号：O643.3[理学—物理化学]