原子层沉积氧化锌功能化碳纳米管织物及其光催化特性

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摘要以二乙基锌和去离子水为前驱体，利用原子层沉积（ALD）在自支撑碳纳米管（CNT）织物上沉积氧化锌（ZnO）对其进行了功能化；考察了ALD沉积过程中功能化织物的微观形貌、晶型结构、表面性质及光催化性能。实验结果表明，ZnO最初在CNTs表面生长为纳米颗粒，随ALD循环次数的增加，逐渐形成包覆CNTs的保形生长层，改变ALD沉积条件可精确调控氧化物在CNT织物中的负载量，CNT织物逐渐由强疏水转变为高度亲水。CNTs与六方纤锌矿结构ZnO的结合有效增强了电子转移能力，同时降低了光生电子与空穴的复合几率，ALD功能化CNT织物展现出优异的光催化降解性能，表明ALD是一种能够拓展CNT织物应用领域的灵活且有效的功能化手段。

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	冯建华
	汪莹
	束智昊
	吴明慧

关键词：原子层沉积；碳纳米管织物；功能化；光催化

Abstract： The functionalized fabrics were fabricated using diethyl zinc and deionized water as precursors to deposit ZnO onto self-supporting carbon nanotube (CNT) fabrics by atomic layer deposition(ALD). The microstructure morphologies, crystal structure, surface properties and photocatalytic activities of the fabrics were investigated during ALD. ZnO grows on the CNTs surface as nanoparticulates initially and then forms conformal layers wrapping the CNTs with rising ALD cycles. The oxide loadings in CNT fabrics can be precisely regulated by changing ALD deposition conditions. The originally hydrophobic surface of fabrics is progressively turned to be highly hydrophilic. The combination of CNTs and hexagonal wurtzite ZnO could effectively enhance the electron transfer ability and significantly reduce the recombination probability of photo-generated electrons and holes. The ALD-modified CNT fabric exhibits excellent photocatalytic degradation performance, demonstrating that ALD is an efficient and flexible method for the functional modification of CNT fabrics.

Keywords： atomic layer deposition； carbon nanotube fabrics； functionalization； photocatalysis

Received 2020-07-29;

Fund:滁州学院科研启动基金项目（2020qd06）；安徽省大学生创新创业训练计划项目（S202010377111）。

Corresponding Authors: 冯建华,E-mail:jhfeng920@126.com。 Email: jhfeng920@126.com

About author: 冯建华(1981-),男,博士,副教授,主要从事膜材料及先进沉积技术的研究。

引用本文:

冯建华, 汪莹, 束智昊, 吴明慧.原子层沉积氧化锌功能化碳纳米管织物及其光催化特性[J]. 化学工业与工程, 2021,38(3): 20-27

Feng Jianhua, Wang Ying, Shu Zhihao, Wu Minghui.Atomic Layer Deposition of Zinc Oxide on Carbon Nanotube Fabrics for Photocatalysis[J]. Chemcial Industry and Engineering, 2021,38(3): 20-27

[1] Endo M, Muramatsu H, Hayashi T, et al. ‘Buckypaper’ from coaxial nanotubes[J]. Nature, 2005, doi:10.1038/433476a
[2] Dharap P, Li Z, Nagarajaiah S, et al. Nanotube film based on single-wall carbon nanotubes for strain sensing[J]. Nanotechnology, 2004, 15(3):379-38
[3] Kar S, Bindal R C, Tewari P K. Carbon nanotube membranes for desalination and water purification:Challenges and opportunities[J]. Nano Today, 2012, 7(5):385-389
[4] Hinds B J. Aligned multiwalled carbon nanotube membranes[J]. Science, 2004, 303(5654):62-65
[5] Wu B, Li X, An D, et al. Electro-casting aligned MWCNTs/polystyrene composite membranes for enhanced gas separation performance[J]. Journal of Membrane Science, 2014, 462:62-68
[6] Tanaka T. Filtration characteristics of carbon nanotubes and preparation of buckypapers[J]. Desalination and Water Treatment, 2010, 17(1/2/3):193-198
[7] Yang H, Han Z, Yu S, et al. Carbon nanotube membranes with ultrahigh specific adsorption capacity for water desalination and purification[J]. Nature Communications, 2013, 2220:1-8
[8] George S M. Atomic layer deposition:An overview[J]. Chemical Reviews, 2010, 110(1):111-131
[9] Graniel O, Weber M, Balme S, et al. Atomic layer deposition for biosensing applications[J]. Biosensors & Bioelectronics, 2018, 122:147-159
[10] Raaijmakers I J. Current and future applications of ALD in micro-electronics[J]. ECS Transactions, 2019, 41(2):3-17
[11] Tynell T, Karppinen M. Atomic layer deposition of ZnO:A review[J]. Semiconductor Science and Technology, 2014, 29(4):157-183
[12] van Bui H, Grillo F, van Ommen J R. Atomic and molecular layer deposition:Off the beaten track[J]. Chemical Communications, 2017, 53(1):45-71
[13] Drobek M, Bechelany M, Vallicari C, et al. An innovative approach for the preparation of confined ZIF-8 membranes by conversion of ZnO ALD layers[J]. Journal of Membrane Science, 2015, 475:39-46
[14] Guo L, Zhong Z, Wang Y. Atomic layer deposition on block copolymer membranes with gyroidal nanopores toward periodically nanostructured vapor sensors:Nanotubes versus nanorods[J]. Advanced Materials Interfaces, 2016, doi:10.1002/admi.201600017
[15] Ouyang Y, Cong L, Chen L, et al. Raman study on single-walled carbon nanotubes and multi-walled carbon nanotubes with different laser excitation energies[J]. Physica E:Low-dimensional Systems and Nanostructures, 2008, 40(7):2386-2389
[16] Wang Z, Ci L, Chen L, et al. Polarity-dependent electrochemically controlled transport of water through carbon nanotube membranes[J]. Nano Letters, 2007, 7(3):697-702
[17] Low J, Yu J, Jaroniec M, et al. Heterojunction photocatalysts[J]. Advanced Materials, 2017, doi:10.1002/adma.201601694
[18] Zhu G, Wang H, Yang G, et al. A facile synthesis of ZnO/CNT hierarchical microsphere composites with enhanced photocatalytic degradation of methylene blue[J]. RSC Advances, 2015, 5(89):72476-72481
[19] Xiao F. Construction of highly ordered ZnO-TiO₂ nanotube arrays (ZnO/TNTs) heterostructure for photocatalytic application[J]. ACS Applied Materials & Interfaces, 2012, 4(12):7055-7063