Atomic layer deposition of TiO2 on carbon-nanotube membranes for enhanced capacitive deionization
Atomic layer deposition of TiO2 on carbon-nanotube membranes for enhanced capacitive deionization
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DOI：
10.1016/j.seppur.2018.12.026
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发表时间：
2019-04-15
影响因子：
8.6
通讯作者：
Wang, Yong
中科院分区：
文献类型：
--
作者：
Feng, Jianhua;Xiong, Sen;Wang, Yong
电容去离子（CDI）是一种节能且环保的淡水生产工艺。碳纳米管 (CNT) 是构建高性能 CDI 电极的有前途的构建模块。然而，碳纳米管的强疏水性严重阻碍了其在水环境中的应用。在此，通过原子层沉积（ALD）获得亲水性CNT基膜电极。我们首次证明，ALD 是一种通过在 CNT 表面沉积 TiO2 纳米粒子来增强独立式 CNT 膜电极 CDI 性能的有效且灵活的方法。 CNT膜在适度的ALD循环次数后表现出更好的电吸附行为，并且在海水淡化过程中具有稳定的可重复使用性。
Capacitive deionization (CDI) is an energy-efficient and environment-benign process to produce fresh water. Carbon nanotubes (CNTs) are promising building blocks in constructing high-performance CDI electrodes. Nevertheless, the strong hydrophobicity of CNTs significantly impedes their applications in aqueous environment. Herein, hydrophilic CNT-based membrane electrodes are obtained via atomic layer deposition (ALD). We demonstrate, for the first time, that ALD is an efficient and flexible means of enhancing the CDI performance of free-standing CNT membrane electrodes by depositing TiO2 nanoparticles on the surface of CNTs. The CNT membranes display preferable electrosorption behavior after moderate ALD cycle numbers and stable reusability in the desalination process.