冬瓜基含TiO2炭气凝胶的制备、表征及其光催化性能

doi:10.3969/j.issn.1673-5854.2017.03.002

生物质化学工程 ›› 2017, Vol. 51 ›› Issue (3): 7-13.doi: 10.3969/j.issn.1673-5854.2017.03.002

冬瓜基含TiO₂炭气凝胶的制备、表征及其光催化性能

魏巍^1,2, 曾黔², 陆俊炜¹, 韩合坤¹, 朱建军², 谢吉民²

1. 江苏大学分析测试中心, 江苏镇江 212013;
2. 江苏大学化学化工学院, 江苏镇江 212013

收稿日期:2016-05-31 出版日期:2017-05-30 发布日期:2017-06-01
通讯作者: 朱建军,副教授,博士,硕士生导师,主要从事气凝胶及其复合功能材料研究;E-mail:zhjj029@sina.com。 E-mail:zhjj029@sina.com
作者简介:魏巍(1987-),男,江苏泰州人,博士后,主要从事气凝胶功能材料的研究工作
基金资助:
国家自然科学青年基金资助项目（51402130）；中国博士后科学基金资助项目（2016M590421）

Preparation,Characterization and Photocatalytic Property of Wintermelon-based TiO₂ Carbonaceous Aerogels

WEI Wei^1,2, CENG Qian², LU Junwei¹, HAN Hekun¹, ZHU Jianjun², XIE Jimin²

1. Center of Analysis and Test, Jiangsu University, Zhenjiang 212013, China;
2. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China

Received:2016-05-31 Online:2017-05-30 Published:2017-06-01

摘要/Abstract

摘要： 以冬瓜和钛酸四丁酯为原料，采用水热法和冷冻干燥法成功制备出含TiO₂炭气凝胶（WTCA），研究了其对罗丹明B废水的光催化降解性能，并考察了水中常见无机盐离子对其光催化效果的影响。利用X射线衍射仪（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、拉曼光谱仪（Raman）和荧光光谱仪（FL）等对样品结构和性能进行了表征。XRD、Raman和EDS分析表明复合气凝胶中含有锐钛矿TiO₂和碳元素；SEM和TEM分析表明TiO₂纳米颗粒均匀地负载在具有多级孔洞结构的炭气凝胶的骨架表面；含TiO₂炭气凝胶的光催化活性明显高于纯TiO₂，当负载量达30%时，其对罗丹明B的光催化降解效率最高（降解率达96.11%）。此外，无机盐阴离子对复合气凝胶的光催化效果有一定的抑制作用（CO₃^2- > SO₄^2- > Cl^- > NO₃^-），而无机盐阳离子Na⁺、K⁺、Ca²⁺和Mg²⁺的抑制作用不明显。

关键词: 冬瓜基炭气凝胶, 二氧化钛, 光催化活性, 无机盐离子

Abstract: Wintermelon-based TiO₂ carbonaceous aerogel(WTCA) composites were prepared by hydrothermal reaction and freeze drying process with wintermelon and tetrabutyl titanate as precursor. The Rhodamine B(RhB) wastewater was photodegraded by WTCA under visible light irradiation. The effects of various common inorganic salt ions in water on the photodegradation were also studied systematically. The morphology structure and properties of as-prepared samples were characterized by using X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),Raman spectrometer,and fluorescence spectroscopy(FL). XRD,Raman and EDS analysis results showed that anatase titanium oxide and carbon element appeared in the WTCA. SEM and TEM analysis results showed that TiO₂ nanoparticles were homogeneously anchored on the skeleton surface of hierarchical carbonaceous aerogels. Meanwhile the composite aerogels exhibited better photodegradation capacities for the RhB than pure TiO₂. The photocatalytic effect of WTCA had the best photocatalytic efficiency(96.11%) when TiO₂ load up to 30%. Moreover,the inorganic salt anion ions had the negative effect on photodegradation effect with the order of CO₃^2- > SO₄^2- > Cl^- > NO₃^- while the inhibitory effects of cationic ions(Na⁺,K⁺,Ca²⁺ and Mg²⁺) were not obvious.

Key words: wintermelon-based carbonaceous aerogels, TiO₂, photodegradation efficiency, inorganic salt ions

中图分类号:

TQ35
O643

魏巍, 曾黔, 陆俊炜, 韩合坤, 朱建军, 谢吉民. 冬瓜基含TiO₂炭气凝胶的制备、表征及其光催化性能[J]. 生物质化学工程, 2017, 51(3): 7-13.

WEI Wei, CENG Qian, LU Junwei, HAN Hekun, ZHU Jianjun, XIE Jimin. Preparation,Characterization and Photocatalytic Property of Wintermelon-based TiO₂ Carbonaceous Aerogels[J]. bce, 2017, 51(3): 7-13.

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冬瓜基含TiO₂炭气凝胶的制备、表征及其光催化性能

Preparation,Characterization and Photocatalytic Property of Wintermelon-based TiO₂ Carbonaceous Aerogels

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