Synergistic effects in N-K₂Ti₄O₉/UiO-66-NH₂ composites and their photocatalysis degradation of cationic dyes

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• 作者：Sunfeng Li ; Xing Wang ; Qinqin He ; Qi Chen ; Yanli Xu ; Hanbiao Yang ; Mengmeng Lü ; Fengyu Wei ; ^{weifyliuj@163.com" class="auth_mail" title="E-mail the corresponding author} ; Xueting Liu ; ^{wmlxt@163.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Nitrogen-doped potassium titamate ; UiO-66-NH2 ; Selective photocatalysis ; Synergistic effect ; Composite
• 刊名：Chinese Journal of Catalysis
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：37
• 期：3
• 页码：367-377
• 全文大小：2092 K

文摘

N-K₂Ti₄O₉/UiO-66-NH₂ composites synthesized by a facile solvothermal method have a core-shell structure with UiO-66-NH₂ forming the shell around a N-K₂Ti₄O₉ core. Their photocatalytic activities in the degradation of dyes under visible light irradiation were investigated. The N-K₂Ti₄O₉/ UiO-66-NH₂ composites exhibited higher photocatalytic activity than the pure components. This synergistic effect was due to the high adsorption capacity of UiO-66-NH₂ and that the two components together induced an enhanced separation efficiency of photogenerated electron-hole pairs. The mass ratio of N-K₂Ti₄O₉ to ZrCl₄ of 3:7 in the composite exhibited the highest photocatalytic activity. Due to the electrostatic attraction between the negatively charged backbone of UiO-66-NH₂ with the positively charged groups of cationic dyes, the composites were more photocatalytically active for cationic dyes than for anionic dyes.