硫化镉-二氧化钛/分子筛复合光催化材料制备及性能研究

摘要/Abstract

摘要：

将水热法制备的二氧化钛负载在分子筛上,再与硫化镉复合,制备了硫化镉-二氧化钛/分子筛复合材料。对复合材料的相组成、微观结构、形貌和光谱性质进行了表征。在可见光照射下,以光催化降解亚甲基蓝为探针反应,研究了复合材料的光催化活性。结果表明：与纯二氧化钛相比,二氧化钛/分子筛具有更快的吸附降解效率;与二氧化钛/分子筛、硫化镉/分子筛相比,硫化镉-二氧化钛/分子筛复合材料的光催化性能最为优越。硫化镉-二氧化钛/分子筛优化制备条件：硫化镉溶液质量浓度为2.0 g/L、反应温度为80 ℃,反应时间为4 h。

关键词: 硫化镉-二氧化钛/分子筛复合材料, 催化剂, 光催化活性

Abstract:

The TiO₂ prepared by hydrothermal synthesis was loaded on the molecular sieve and compounded with CdS to prepare the CdS-TiO₂/zeolite composite.The phase composition,microstructure,morphology and spectral properties of the composites were characterized.The photocatalytic activity of the composite material was evaluated by photo-catalytic degradation of methylene blue as the probe reaction under visible light irradiation.The results showed that the TiO₂/zeolite composite catalysts had faster photo-catalytic activity than that of pure TiO₂ powders.Compared with the TiO₂/zeolite and CdS/zeolite, the CdS-TiO₂/zeolite composite catalysts had the best photo-catalytic activity.The optimal conditions of producing CdS-TiO₂/zeolitewere as follows: the mass concentration of CdS was 2.0 g/L,the water bath temperature was 80 ℃ and the reaction time was 4 h.

Key words: CdS-TiO₂-zeolite composite, catalyst, photo-catalytic activity

中图分类号:

TQ134.11

徐元盛,李建伟,马炎,李国旺,张茂亮,单雪强. 硫化镉-二氧化钛/分子筛复合光催化材料制备及性能研究[J]. 无机盐工业, 2019, 51(6): 83-87.

Xu Yuansheng,Li Jianwei,Ma Yan,Li Guowang,Zhang Maoliang,Shan Xueqiang. Study on preparation and property of CdS-TiO₂/zeolite composite catalysts[J]. Inorganic Chemicals Industry, 2019, 51(6): 83-87.

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参考文献 26

[1]	Neppolian B, Mine S, Horiuchi Y , et al. Efficient photocatalytic de-gradation of organics present in gas and liquid phases using Pt-TiO₂/zeolite(H-ZSM)[J]. Chemosphere, 2016,153:237-243.
[2]	Wang Z Q, Liang H, Liao L M , et al. Zeolite supported-nano TiO₂ composites prepared by a facile solid diffusion process as high per-formance photocatalysts[J]. Journal of Nanoscience and Nanotech-nology, 2018,18:5726-5730.
[3]	Mohamad Alosfur F K, Ridha N J, Mohammad Hafizuddin Haji J , et al. One-step formation of TiO₂ hollow spheres via a facile microwave-assisted process for photocatalytic activity[J]. Nanotechnology, 2018,29(14):145707.
[4]	Parra M A, Elustondo D, Bermejo R , et al. Quantification of indoor and outdoor volatile organic compounds(VOCs) in pubs and cafes in Pamplona,Spain[J]. Atmospheric Environment, 2008,42:6647-6654.
[5]	Rosales A, Maury-Ramírez A, Gutiérrez R M D, et al. SiO₂@TiO₂ coating:synjournal,physical characterization and photocatalytic ev-aluation[J]. Coatings, 2018,8(4):120.
[6]	Guo J, Van Bui H, Valdesueiro D , et al. Suppressing the photocata-lytic activity of TiO₂ nanoparticles by extremely thin Al₂O₃ films grown by gas-phase deposition at ambient conditions[J]. Nanoma-terials, 2018,8(2):61.
[7]	Naik B, Moitra D, Dayananda D , et al. A facile method for prepara-tion of TiO₂ nanoparticle loaded mesoporous γ-Al₂O₃:an efficient but cost-effective catalyst for dye degradation[J]. Journal of Nano-science & Nanotechnology, 2016,16(8):8544-8549.
[8]	Chen J, Eberlein L, Langford C H . Pathways of phenol and benzene photooxidation using TiO₂ supported on a zeolite[J]. Journal of Pho-tochemistry and Photobiology A, 2002,148(3):183-189.
[9]	Dutta P K, Severance M . Photoelectron transfer in zeolite cages and its relevance to solar energy conversion[J]. Journal of Physical Che-mistry Letters, 2014,2(5):467-476.
[10]	Deng H, Zhang Y, Geng S . Enhanced copper removal from aqueous solution by hydrous TiO₂/zeolite composite[J]. Advances in Applied Ceramics, 2018,117(2):1-9.
[11]	Kovalevskiy N S, Lyulyukin M N, Selishchev D S , et al. Analysis of air photocatalytic purification using a total hazard index:Effect of the composite TiO₂/zeolite photocatalyst[J]. Journal of Hazardous Materials, 2018,358:302-309.
[12]	Pei C C, Leung W W F. Photocatalytic degradation of Rhodamine B by TiO₂/ZnO nanofibers under visible-light irradiation[J]. Separa-tion and Purification Technology, 2013,114:108-116.
[13]	Lak A, Simchi A, Nemati Z A . Photocatalytic activity of TiO₂-capp-ed ZnO nanoparticles[J]. Journal of Materials Science:Materials in Electronics, 2012,23(2):361-369.
[14]	Kaneva N, Stambolova I, Blaskov V , et al. Microwave-assisted and conventional sol-gel preparation of photocatalytically active ZnO/TiO₂/glass multilayers[J]. Central European Journal of Chemistry, 2013,11(7):1055-1065.
[15]	Nah Y C, Shrestha N K, Kim D , et al. Electrochemical growth of self-organized TiO₂-WO₃ composite nanotube layers:effects of ap-plied voltage and time[J]. Journal of Applied Electrochemistry, 2013,43(1):9-13.
[16]	Chen L C, Tsai F R, Fang S H , et al. Properties of sol-gel SnO₂/TiO₂ electrodes and their photoelectrocatalytic activities under UV and visible light illumination[J]. Electrochimica Acta, 2009,54(4):1304-1311.
[17]	Zhao W, Bai Z, Ren A , et al. Sunlight photocatalytic activity of CdS modified TiO₂ loaded on activated carbon fibers[J]. Applied Sur-face Science, 2010,256:3493-3498.
[18]	Chen S, Liu W, Zhang S , et al. Preparation and activity evaluation of relative p-n junction photocatalyst Co-TiO₂/TiO₂[J]. Journal of Sol-Gel Science and Technology, 2010,54(2):258-267.
[19]	Wang M, Hua J H, Yang Y L . Fabrication of CDs/CdS-TiO₂ ternay nano-composites for photocatalytic degradation of benzene and toluene under visible light irradiation[J]. Spectrochimica Acta Part A:Molecular and Biomolecular Spectroscopy, 2018,199:102-109.
[20]	Yang Y, Yu C L, Guan C L . Study of the photocatalytic degradation of toluene over CdS-TiO₂ nanoparticles supported on multi-walled carbon nanotubes by back propagation neural network[J]. Fuller-enes,Nanotubes and Carbon Nanostructures, 2018,26(5):246-254.
[21]	Prasannalakshmi P, Shanmugam N . Photocatalytic decolourization of brilliant green and methylene blue by TiO₂/CdS nanorods[J]. Journal of Solid State Electrochemistry, 2017,21(6):1751-1766.
[22]	Zhao H, Cui S, Yang L , et al. Synjournal of hierarchically meso-mac- roporous TiO₂/CdS heterojunction photocatalysts with excellent visible-light photocatalytic activity[J]. Journal of Colloid and In-terface Science, 2017,512:47-54.
[23]	Liu C, Yang Y, Li J , et al. Phase transformation synjournal of TiO₂/CdS heterojunction film with high visible-light photoelectrochemical activity[J]. Nanotechnology, 2018,29(26):265401.
[24]	Rimeh D, Patrick D, Didier R . Modified TiO₂ for environmental pho-tocatalytic applications:a review[J]. Industrial & Engineering Che-mistry Research, 2013,52(10):3581-3599.
[25]	Srinivasan S S, Wade J, Stefanakos E K . Visible light photocatalysis via CdS/TiO₂ nanocomposite materials[J]. Journal of Nanomateri-als, 2006,2006(1):24.
[26]	Wang J Y, Liu Z H, Zheng Q , et al. Preparation of photosensitized nanocrystalline TiO₂ hydrosol by nanosized CdS at low temperature[J]. Nanotechnology, 2006,17(18):4561-4566.

样品	比表面积/ （m²·g^-1）	表观常数/ min^-1	晶粒大小/ nm
TiO₂	91.34	0.009 4	19.58
TiO₂/分子筛	122.73	0.015 2	15.42
CdS/分子筛	127.65	0.014 8	15.11
CdS-TiO₂/分子筛	137.45	0.016 6	16.93

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