Enhanced water purification via redox interfaces created by an atomic layer deposition strategy,Environmental Science: Nano

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Enhanced water purification via redox interfaces created by an atomic layer deposition strategy
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2021-3-2 , DOI: 10.1039/d1en00085c
Liming Huang _{1,

2,

3,

4,

5} , Tingting Yan _{1,

2,

3,

4,

5} , Alaa El Din Mahmoud _{6,

7,

8,

9,

10} , Shuangxi Li _{1,

2,

3,

4,

5} , Jianping Zhang _{1,

2,

3,

4,

5} , Liyi Shi _{1,

2,

3,

4,

5} , Dengsong Zhang _{1,

2,

3,

4,

5}

Affiliation

The crisis of water scarcity has become one of the most urgent issues to be settled. It is still a challenge to develop a highly efficient water purification technology. In this work, highly efficient capacitive removal of metal ions from wastewater was demonstrated by using Ti–C redox interfaces created by an atomic layer deposition (ALD) strategy. It has been illustrated that the TiO₂ nanolayer was formed by reaction on the surface of porous carbon (PC) by using an ALD strategy, which could effectively build the Ti–C redox interfaces; and thus, the TiO₂ nanolayer on PC was beneficial for facilitating ion diffusion/transmission and adsorption/insertion. Impressively, this process showed a deionization capacity of 38.54 mg g⁻¹ in a 500 mg L⁻¹ NaCl solution at 1.2 V. In addition, this process had excellent capacitive removal efficiency to treat complicated water containing multiple metal ions (K⁺, Mg²⁺, Ca²⁺, Ni²⁺, Co²⁺, Cu²⁺, Pb²⁺, Cd²⁺, Cr²⁺, Fe³⁺ and Al³⁺). This work has important practical implication for highly efficient removal of metal ions from wastewater.

中文翻译：

通过由原子层沉积策略创建的氧化还原界面增强水净化能力

缺水危机已成为最迫切需要解决的问题之一。开发高效的水净化技术仍然是一个挑战。在这项工作中，通过使用由原子层沉积（ALD）策略创建的Ti-C氧化还原界面，证明了从废水中高效去除金属离子的电容。已经证明，通过使用ALD策略在多孔碳（PC）表面反应形成TiO ₂纳米层，可以有效地建立Ti-C氧化还原界面。因此，PC上的TiO ₂纳米层有利于促进离子的扩散/透射和吸附/插入。令人印象深刻的，这个过程表明38.54毫克g的去离子容量^-1在500毫克的L ^-1NaCl溶液的电压为1.2V。此外，该工艺具有出色的电容去除效率，可以处理含有多种金属离子（K ⁺，Mg 2 ⁺，Ca 2 ⁺，Ni 2 ⁺，Co 2 ⁺，Cu ²⁺，Pb ^2的复杂水⁺，Cd 2 ⁺，Cr 2 ⁺，Fe ³⁺和Al ³⁺）。这项工作对于从废水中高效去除金属离子具有重要的实际意义。

更新日期：2021-03-18

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