Fe掺杂g-C<sub>3</sub>N<sub>4</sub>的制备及其可见光催化性能

引用本文: 金瑞瑞, 游继光, 张倩, 刘丹, 胡绍争, 桂建舟. Fe掺杂g-C₃N₄的制备及其可见光催化性能[J]. 物理化学学报, 2014, 30(9): 1706-1712. doi: 10.3866/PKU.WHXB201406272 shu

Citation: JIN Rui-Rui, YOU Ji-Guang, ZHANG Qian, LIU Dan, HU Shao-Zheng, GUI Jian-Zhou. Preparation of Fe-Doped Graphitic Carbon Nitride with Enhanced Visible-Light Photocatalytic Activity[J]. Acta Physico-Chimica Sinica, 2014, 30(9): 1706-1712. doi: 10.3866/PKU.WHXB201406272 shu

Fe掺杂g-C₃N₄的制备及其可见光催化性能

基金项目:
新世纪优秀人才支持计划（NCET-11-1011)

国家自然科学基金（21103077)

辽宁省自然科学基金（201202123）资助项目

摘要:

以硝酸铁和三聚氰胺为原料制备不同含铁量的Fe 掺杂石墨氮化碳（g-C₃N₄）. 采用X 射线衍射光谱（XRD）、紫外-可见（UV-Vis）光谱、傅里叶变换红外（FT-IR）光谱、电感耦合等离子体-原子发射光谱（ICP-AES）、荧光（PL）光谱、X光电子能谱（XPS）等分析手段对制备的催化剂进行了表征. 结果表明，铁以离子形式镶嵌在g-C₃N₄的结构单元中，影响了g-C₃N₄的能带结构，增加了g-C₃N₄对可见光的吸收，降低了光生电子-空穴对的复合几率. 以染料罗丹明B的降解为探针反应系统研究了不同含铁量对g-C₃N₄在可见光下催化性能的影响. 结果表明，m（Fe）/m（g-C₃N₄）=0.14%时，制备的Fe 掺杂g-C₃N₄表现出最佳的光催化性能，120 min 内罗丹明B的降解率高达99.7%，速率常数达到0.026 min^-1，是纯g-C₃N₄的3.2 倍. 以叔丁醇、对苯醌、乙二胺四乙酸二钠为自由基（·OH）、自由基（O₂^-·）和空穴（h_VB⁺）的捕获剂，研究了光催化反应机理.

关键词:

English

Preparation of Fe-Doped Graphitic Carbon Nitride with Enhanced Visible-Light Photocatalytic Activity

1.
Division of Chemistry, Chemical Engineering and Environment, Liaoning Shihua University, Fushun 113001, Liaoning Province, P. R. China
Received Date: 08 May 2014
Available Online: 29 August 2014
Fund Project:
新世纪优秀人才支持计划（NCET-11-1011)

国家自然科学基金（21103077)

辽宁省自然科学基金（201202123）资助项目

Abstract:

A series of Fe-doped graphitic carbon nitride (g-C₃N₄) photocatalysts were prepared using ferric nitrate and melamine as precursors. X-ray diffraction (XRD), ultraviolet-visible (UV-Vis) spectroscopy, Fouriertransform infrared (FT-IR) spectroscopy, inductively coupled plasma-atomic emission spectroscopy (ICP-AES), photoluminescence (PL) spectrum, and X-ray photoelectron spectroscopy (XPS) were used to identify changes in the characteristics caused by coordination of N atoms in the structural units of g-C₃N₄. The results indicate that embedded Fe³⁺ changed the optical properties, affected the energy band structure, and increased the electron/hole separation rate. The activities of the Fe³⁺-doped g-C₃N₄ catalysts were tested in the photocatalytic degradation of rhodamine B (RhB) under visible light. The degradation rate of RhB over Fe³⁺-doped g-C₃N₄ was 99.7% in 120 min. The rate constant for Fe³⁺-doped g-C₃N₄ was 3.2 times as high as that of pure g-C₃N₄. Disodium ethylenediamine tetraacetate, tert-butyl alcohol, and 1,4-benzoquinone were used as hole (h_VB⁺), hydroxyl radical (·OH), and superoxide radical (O₂^-·) scavengers, respectively, to investigate the possible mechanism.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Fe掺杂g-C₃N₄的制备及其可见光催化性能

English

Preparation of Fe-Doped Graphitic Carbon Nitride with Enhanced Visible-Light Photocatalytic Activity

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

Fe掺杂g-C3N4的制备及其可见光催化性能

English

Preparation of Fe-Doped Graphitic Carbon Nitride with Enhanced Visible-Light Photocatalytic Activity

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

Fe掺杂g-C₃N₄的制备及其可见光催化性能

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs