收稿日期: 2010-02-04
网络出版日期: 2019-06-03
基金资助
教育部科学技术研究重点项目(207108)
Sonochemical preparation of nano-TiO2 and photocatalytic degradation of activated dark blue ST-2GLN
Received date: 2010-02-04
Online published: 2019-06-03
介绍了TiCl4超声水解制备纳米TiO2的方法,探讨了超声波的作用机理,并以活性深蓝ST-2GLN为目标降解物,考察超声波及煅烧温度对纳米TiO2光催化性能的影响。结果表明:超声波能大幅度提高纳米TiO2光催化性能;300℃煅烧得到的纳米TiO2在催化剂质量浓度1.0g/L,25℃,8W紫外灯(波长254nm)照射,活性深蓝ST-2GLN水溶液初始质量浓度30mg/L的条件下,80min降解率即可达到99.7%。
关键词: 纳米TiO2; 超声波; 活性深蓝ST-2GLN; 光催化
刘满红, 胡远飞, 王锐, 刘晓芳, 潘继军 . 超声制纳米TiO2及光催化降解活性深蓝的研究[J]. 工业水处理, 0 : 25 -27 . DOI: 10.11894/1005-829x.2010.30(6).25
The preparation of nano-TiO2 by sonochemical hydrolysis of TiCl4 is introduced, and the mechanism of ultrasound is discussed. The effects of ultrasound and calcination temperature on the photocatalytic degradation of active dark blue ST-2GLN are experimentally investigated. The results show that ultrasound improves the photocatalytic capacity of nano-TiO2 greatly. Under the optimized conditions as follows:the nano-TiO2 obtained by calci nations at 300 ℃, the catalyst dosage is 1.0 g/L, temperature 25 ℃, ultraviolet irradiation 8 W(wave length 254 nm), and the aqueous solution initial concentration of activated dark blue ST-2GLN 30 mg/L, the degradation rate is up to 99.7% in 80 min.
Key words: nano-TiO2; ultrasonic; activated dark blue ST-2GLN; photocatalysis
[1] Hager D G. Industrial wastewater treatment by granular activated carbon[J]. Am. Dyestuff Reporter, 1998,62(11):69-75.
[2] Karcher S, Kornmüller A, Jekel M. Removal of reactive dyes by sorption/complexation with cucurbituril [J]. Wat. Sci. Tech.,1999,40(4/5):425-433.
[3] 梁新义. 超声场对固体催化剂制备结构和催化性能影响的研究[D].天津:天津大学,1998.
[4] Dong Rueyan, Chang Wenhuei. Photoassisted titanium dioxide mediated degradation of organophosphorus pesticides by hydrogen peroxide [J]. J. Photochem. Photobiol. A: Chemistry, 1997, 107(1/2/3):239-244.
[5] 施冬梅,李再兴,多金环. 纳米TiO2光催化降解水体污染物研究进展[J]. 环境科学与技术,2002,25(5):46-48.
[6] Wang Jun, Guo Baodong, Zhang Xiangdong,et al. Sonocatalytic degradation of methyl orange in the presence of TiO2 catalysts and catalytic activity comparison of rutile and anatase [J]. Ultrason. Sonochem.,2005,12(5):331-337.
[7] Suslick K S, Price G J. Applications of ultrasound to materials chemistry[J]. Annu. Rev. Mater. Sci.,1999,29(1): 295-326.
[8] Awati P S, Awate S V, Shah P P,et al. Photocatalytic decomposition of methylene blue using nanocrystalline anatase titania prepared by ultrasonic technique [J]. Catalysis Communications, 2003,4 (8):393-400.
[9] Yu Jiaguo, Zhou Minghua, Cheng Bei, et al. Ultrasonic preparation of mesoporous titanium dioxide nanocrystalline photocatalysts and evaluation of photocatalytic activity [J]. Journal of Molecular Catalysis A: Chemical, 2005,227(1/2): 75-80.
/
〈 |
|
〉 |