Preparation and performance of Pr3+: Y2SiO5/TiO2 composites deposited on activated carbon fiber

doi:10.11949/j.issn.0438-1157.20160716

CIESC Journal ›› 2016, Vol. 67 ›› Issue (11): 4885-4891.DOI: 10.11949/j.issn.0438-1157.20160716

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Preparation and performance of Pr³⁺: Y₂SiO₅/TiO₂ composites deposited on activated carbon fiber

XU Mengchuan¹, WANG Yamiao¹, YANG Yi^1,2, JIAO Yan², LIU Ying¹, YAN Xuewu¹

1 School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China;
2 Jiangsu Engineering Technology Research Center of Environmental Cleaning Materials[CEM), School of Environmental Sciences and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, Jiangsu, China

Received:2016-05-24 Revised:2016-08-11 Online:2016-11-05 Published:2016-11-05
Supported by:
supported by the Open Foundation of China Jiangsu Engineering Technology Research Center of Environmental Cleaning Materials (KFK1504), the Industry-Academia-Research Joint Innovation Fund of Jiangsu Province (BY2016004-02) and the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.

活性炭纤维负载Pr³⁺:Y₂SiO₅/TiO₂复合材料的制备与性能

徐萌川¹, 王亚淼¹, 杨毅^1,2, 焦岩², 刘颖¹, 颜学武¹

1 南京理工大学环境与生物工程学院, 江苏南京 210094;
2 南京信息工程大学环境科学与工程学院, 江苏省环境净化材料工程技术研究中心, 江苏南京 210044

通讯作者: 杨毅,yyi301@126.com
基金资助:
江苏省环境净化材料工程技术研究中心开放基金项目（KFK1504）；江苏省产学研前瞻性联合研究项目（BY2016004-02）；江苏高校优势学科建设工程资助项目（PAPD）。

Abstract

Abstract:

In order to improve sunlight utilization as well as to recycle and reuse photocatalyst of titanium dioxide, Pr³⁺:Y₂SiO₅/TiO₂/ACF composites were prepared by sol-gel technique of anchoring upconversion fluorescent material and nano-titanium dioxide on activated carbon fiber (ACF). Structures and properties of the Pr³⁺:Y₂SiO₅/TiO₂/ACF composites were characterized by XRD, FT-IR, SEM, FS, and UV-vis DRS. Photocatalytic activity of the composites in the visible light region was evaluated with methylene blue solution as model pollutant and studied the effect of fabrication conditions such as calcination temperature and number of coating layers. The experimental results showed that TiO₂ in Pr³⁺:Y₂SiO₅/TiO₂/ACF composite contained both anatase (34.1%) and rutile (65.9%) when prepared by double coating and 800℃ calcination. This composite had the highest visible-light photocatalytic activity which degraded methylene blue (15 mg·L^-1) high as 93.8% in 12 h. The photodegradation followed pseudo first order kinetics with reaction rate constant is 0.2471 h^-1. Pr³⁺:Y₂SiO₅/TiO₂/ACF composite remained degradation rate above 75% after recycled and regenerated for use four times.

Key words: upconversion, nano-titanium dioxide, composites, adsorption, degradation, regeneration

摘要：

为了提高纳米TiO₂对太阳光的利用率和实现光催化剂的回收再利用，采用溶胶-凝胶法将上转换荧光材料与纳米TiO₂复合，通过负载于活性炭纤维（ACF）表面制备了Pr³⁺：Y₂SiO₅/TiO₂/ACF复合材料。运用XRD、FT-IR、SEM、FS、UV-vis DRS等对材料的结构及性能进行了综合表征，并以亚甲基蓝为模拟污染物评价复合材料的可见光催化活性，考察了材料制备过程中煅烧温度、负载次数等制备条件对复合材料可见光下催化性能的影响。结果表明，在浸渍2次、800℃煅烧的制备条件下，复合材料中TiO₂为锐钛矿相（占34.1%）与金红石相（占65.9%）的混合相，亚甲基蓝（15 mg·L^-1）12 h内去除率高达93.8%，反应符合拟一级动力学，反应速率常数为0.2471 h^-1，回收再生利用4次后去除率仍保持在75%以上。

关键词: 上转换, 纳米TiO₂, 复合材料, 吸附, 降解, 再生

CLC Number:

X788

XU Mengchuan, WANG Yamiao, YANG Yi, JIAO Yan, LIU Ying, YAN Xuewu. Preparation and performance of Pr³⁺: Y₂SiO₅/TiO₂ composites deposited on activated carbon fiber[J]. CIESC Journal, 2016, 67(11): 4885-4891.

徐萌川, 王亚淼, 杨毅, 焦岩, 刘颖, 颜学武. 活性炭纤维负载Pr³⁺:Y₂SiO₅/TiO₂复合材料的制备与性能[J]. 化工学报, 2016, 67(11): 4885-4891.

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Preparation and performance of Pr³⁺: Y₂SiO₅/TiO₂ composites deposited on activated carbon fiber

活性炭纤维负载Pr³⁺:Y₂SiO₅/TiO₂复合材料的制备与性能

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