TiO<sub>2</sub>/GO复合材料紫外光催化降解水中腐植酸

陈俊伟; 李丽丽; 方智煌; 叶玲芬; 郑佳慧; 王菲凤

doi:10.13205/j.hjgc.202008015

TiO₂/GO复合材料紫外光催化降解水中腐植酸

doi: 10.13205/j.hjgc.202008015

1. 福建师范大学环境科学与工程学院, 福州 350007;
2. 福建省污染控制与资源循环重点实验室, 福州 350007;
3. 福建省建筑科学研究院有限责任公司, 福州 350028

基金项目:

福建省科技厅高校产学合作项目（2016Y4002），福建省科技厅社会发展引导性项目（2018Y0022）。

详细信息

作者简介:
陈俊伟(1994-),男,硕士研究生,主要研究方向为光催化降解有机污染物。cjw0306@qq.com

通讯作者:
王菲凤(1968-),女,教授级高级工程师,主要研究方向为饮用水安全处理。wffeng@126.com

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出版历程
- 收稿日期: 2019-05-27

DEGRADATION OF HUMIC ACID IN WATER BY ULTRAVIOLET PHOTOCATALYSIS OF TiO₂/GO COMPOSITE NANOMATERIALS

1. College of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, China;
2. Key Laboratory of Resource Cycle and Pollution Control of Fujian Province, Fuzhou 350007, China;
3. Fujian Academy of Building Research Institute Co., Ltd, Fuzhou 350028, China

摘要

摘要: 采用溶胶凝胶法在最优煅烧温度（350℃）下，制备不同石墨烯（GO）负载比例的TiO₂/GO复合光催化材料，通过SEM、XRD、Raman、FT-IR、TGA、BET等技术表征并分析材料的表面形貌、晶相结构、官能团与化学键合等特征，进而探究该复合材料在紫外光下对水中腐植酸（HA）的降解性能和机理。结果表明：随着石墨烯（GO）负载比例的增大，TiO₂/GO复合催化剂粒径变小，比表面积增大，有层次的形貌空隙有效减小了团聚，提升了光生载流子迁移效率；Raman光谱中1350 cm^-1和1600 cm^-1的2处特征峰验证GO成功负载，且晶型仍以锐钛矿相为主；3%GO负载量的TiO₂/GO光催化性能最优。当TiO₂/3%GO投加量为0.5 g/L，水中HA初始浓度为10 mg/L时，在紫外光下催化反应1 h后降解率达到84.7%，其降解速率常数为0.0313 min^-1。
- TiO₂ /
- GO /
- 纳米材料 /
- 紫外光催化 /
- 腐植酸
Abstract: In this paper, TiO₂/GO composite photocatalysts were prepared through sol-gel method by using butyl titanate and different loads of graphene oxide as precursors, at the optimal calcination temperature (350℃). The structure and properties of TiO₂/GO nanomaterials were characterized by SEM, XRD, Raman, FT-IR, TGA and BET. The degradation characteristic of humic acid (HA) in water by composite materials under UV light were analyzed. The results showed that the particle size of TiO₂/GO composite catalyst was decreased, while the specific surface area was increased, the agglomeration effect was reduced and the photocatalytic efficiency was improved, with the increase of GO loading ratio. The two characteristic peaks of 1350 cm^-1 and 1600 cm^-1 in Raman spectrum indicated that the GO was successfully loaded in TiO₂ nanomaterial, and the crystal type was mainly anatase. The composite material with 3%GO loaded performed best. When TiO₂/3%GO dosage was 0.5 g/L and the initial HA concentration in water was 10 mg/L, the degradation rate under ultraviolet light reached 84.7% after 1 h of radiation, and the degradation rate constant was 0.0313 min^-1.
- TiO₂ /
- GO /
- nanomaterial /
- ultraviolet photocatalysis /
- humic acid

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