| 凹凸棒石/g-C3N4-AgFeO2复合材料制备及其光催化性能 |
| Synthesis and Photocatalytic Performance of Attapulgite/g-C3N4-AgFeO2 Composites |
| 作者 | 单位 | E-mail | | 谢登裕 | 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, 江苏省环境功能材料工程实验室, 淮安 223300 | | | 蒋亿 | 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, 江苏省环境功能材料工程实验室, 淮安 223300 | | | 纪媛媛 | 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, 江苏省环境功能材料工程实验室, 淮安 223300 | | | 殷明慧 | 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, 江苏省环境功能材料工程实验室, 淮安 223300 | | | 盛振环 | 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, 江苏省环境功能材料工程实验室, 淮安 223300 | | | 赵伟 | 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, 江苏省环境功能材料工程实验室, 淮安 223300 | | | 殷竟洲 | 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, 江苏省环境功能材料工程实验室, 淮安 223300 | | | 李乔琦 | 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, 江苏省环境功能材料工程实验室, 淮安 223300 | | | 仲慧 | 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, 江苏省环境功能材料工程实验室, 淮安 223300 | | | 张莉莉 | 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, 江苏省环境功能材料工程实验室, 淮安 223300 | zll@hytc.edu.cn |
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| 摘要: 以凹凸棒石（简称凹土，ATP）为基体，通过原位化学法一步直接合成g-C3N4薄层材料，并将其有效固载于凹土表面（ATP/g-C3N4），再通过原位沉淀法引入不同比例AgFeO2纳米颗粒，构筑系列兼具磁分离特性和高效光催化活性的ATP/g-C3N4-AgFeO2-Y复合光催化剂（Y=wATP/g-C3N4/（wATP/g-C3N4+wAgFO2）×100%，表示ATP/g-C3N4在ATP/g-C3N4-AgFeO2复合材料中所占的质量百分数）。采用XRD、SEM、BET、UV-Vis、PL和ICP表征其结构和物化性能，以酸性红G（ARG）为目标降解物，研究其光催化性能。研究发现：通过形成Si-O-C键，g-C3N4薄层被均匀固定在凹土表面；AgFeO2纳米颗粒均匀沉积于ATP/g-C3N4表面并形成Z型异质结，ATP/g-C3N4-AgFeO2-Y具有比ATP/g-C3N4和AgFeO2更优异的可见光光催化性能，且随着ATP/g-C3N4含量的增大呈先升高而后下降的趋势；当Y=57%时复合材料的性能最佳，ATP/g-C3N4-AgFeO2-57%对20 mg·L-1酸性红G的降解率可达97.4%，循环4次使用后，降解率仍保持94.2%。通过自由基捕获实验研究了光催化反应机理，发现·O2-是光催化过程的主要活性物种。 |
| 关键词: 物理化学 无机非金属材料 可见光催化 凹凸棒石 类石墨相氮化碳 铁酸银 |
| 基金项目: 国家自然科学基金（No.51472101）、江苏省自然科学基金（No.BK20161305）、江苏省六大人才高峰（No.JY-31）和江苏省高校大学生创新计划（No.201710323004Z）资助项目 |
| Abstract: Attapulgite (ATP) was chosen as the matrix of g-C3N4 thin layer and AgFeO2 nanoparticles to fabricate a series of ATP/g-C3N4-AgFeO2-Y composites presenting both magnetic separation and high photocatalytic activity by in-situ chemical method, where Y stands for the mass percentage of ATP/g-C3N4 in the composite (Y=wATP/g-C3N4/(wATP/g-C3N4+wAgFO2)×100%). XRD, SEM, BET, UV-Vis, PL and ICP were used to characterize the structure and physicochemical properties of the products. Photodegradation of acid red G (ARG) was chosen as target to investigate the photocatalytic property of all the products. It was found that g-C3N4 thin layer was uniformly fixed on the surface of the ATP by forming a Si-O-C bond, while the AgFeO2 nanoparticles were deposited on the surface of ATP/g-C3N4 uniformly to form a type Z heterojunction structure. ATP/g-C3N4-AgFeO2-Y presented higher visible light photocatalytic performance than that of ATP/g-C3N4 and AgFeO2. The photocatalytic activity of ATP/g-C3N4-AgFeO2-Y changed with the content of ATP/g-C3N4, and when Y=57%, ATP/g-C3N4-AgFeO2-57% shows the best photocatalytic activity. The degradation rate of 20 mg·L-1 acid red G was up to 97.4%, and it remained at 94.2% after 4 cycles when catalyzed by ATP/g-C3N4-AgFeO2-57%. The photocatalytic mechanism was studied by free radical trapping experiments. It was found that·O2- is the main active species in the photocatalytic process. |
| Keywords: physical chemistry inorganic nonmetallic materials visible light photocatalysis attapulgite g-C3N4 AgFeO2 |
| 投稿时间：2018-08-18 修订日期：2018-12-17 |
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| 谢登裕,蒋亿,纪媛媛,殷明慧,盛振环,赵伟,殷竟洲,李乔琦,仲慧,张莉莉.凹凸棒石/g-C3N4-AgFeO2复合材料制备及其光催化性能[J].无机化学学报,2019,35(2):236-244. |
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