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日用化学工业（中英文）

日用化学工业 ›› 2019, Vol. 49 ›› Issue (11): 733-736.doi: 10.3969/j.issn.1001-1803.2019.11.006

• 开发与应用 • 上一篇    下一篇

碳量子点改性纳米二氧化钛的制备及其光催化降解壬基酚聚氧乙烯醚的性能研究

尹言吉1,台秀梅1,杜志平1,2()   

  1. 1. 中国日用化学研究院有限公司,山西 太原 030001
    2. 山西大学 资源与环境工程研究所,山西 太原 030006
  • 收稿日期:2019-03-03 修回日期:2019-10-23 出版日期:2019-11-22 发布日期:2019-11-26
  • 通讯作者: 杜志平
  • 作者简介:尹言吉（1993-）,男,硕士研究生,电话：13191063595,E-mail： ridci_yinyanji@163.com。
  • 基金资助:
    国家自然科学基金山西煤基低碳联合基金(U1610222);伽蓝研究基金资助项目(JALA2016)

Preparation and photocatalytic activity of carbon-quantum-dot-modified nano-TiO2

YIN Yan-ji1,TAI Xiu-mei1,DU Zhi-ping1,2()   

  1. 1. China Research Institute of Daily Chemistry Co., Ltd., Taiyuan, Shanxi 030001, China
    2. Resources and Environment Engineering Research Institute, Shanxi University, Taiyuan, Shanxi 030006, China
  • Received:2019-03-03 Revised:2019-10-23 Online:2019-11-22 Published:2019-11-26
  • Contact: Zhi-ping DU

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摘要：

以柠檬酸为碳源,以1-氨丙基-3-甲基咪唑溴盐离子液体为表面修饰剂,一锅热解法制备了离子液体修饰碳量子点（L-CQDs）,再通过简单的水热法将L-CQDs负载到TiO2纳米颗粒上。以表面活性剂壬基酚聚氧乙烯醚（TX-10）溶液为模拟废水,研究了L-CQDs/TiO2复合光催化剂的光催化性能。傅立叶变换红外光谱仪（FT-IR）和高分辨透射电子显微镜（HRTEM）表征结果证明L-CQDs负载到TiO2纳米颗粒的表面上;固体紫外-可见吸收光谱结果表明,L-GQDs/TiO2相比于TiO2纳米颗粒在可见光区域的吸收得到了明显增强;光催化结果表明,复合光催化剂3% L-CQDs/TiO2在500 W氙灯照射下降解0.05 g/L TX-10溶液3 h时,复合光催化剂对TX-10的降解率最高可达83.5%,比TiO2纳米颗粒高26.6%;重复使用5次后复合光催化剂的光催化活性保持不变。

关键词: 碳量子点, 复合光催化剂, 二氧化钛, 光催化, 壬基酚聚氧乙烯醚

Abstract:

Ionic-liquid-modified carbon quantum dots （L-CQDs） were prepared by one-pot pyrolysis using citric acid as carbon source and 1-aminopropyl-3-methyl-imidazolium bromide as surface modifier. TiO2 nanoparticles were loaded with L-GQDs by one-step hydrothermal method. Using a solution of nonylphenol polyoxyethylene ether （TX-10） as the simulated wastewater, the photocatalytic performance of L-CQDs/TiO2 composite photocatalyst was studied. The characterization results are proved by FT-IR and high-resolution transmission electron microscopy （HRTEM） that L-CQDs are loaded onto the surface of TiO2 nanoparticles. The UV-visible absorption spectrum show that the absorption of L-GQDs/TiO2 in the visible region is significantly enhanced compared with TiO2 nanoparticles. The results of photocatalysis show that the degradation rate of 3% L-CQDs/TiO2 to 0.05 g/L TX-10 solution could reach 83.5% under illumination of Xenon lamp for 3 h, which is 26.6% higher than that of TiO2 nanoparticles. The photocatalytic activity of the composite photocatalyst remain unchanged after repeated use for 5 times.

Key words: carbon quantum dots, composite photocatalyst, TiO2, photocatalysis, nonylphenol polyoxyethylene ether

中图分类号: 

  • TQ423