TiO2改性石墨烯电极电吸附去除污水中NH4+

皋海岭; 徐斌; 高月香; 朱月明; 张松贺; 张毅敏

doi:10.11949/0438-1157.20200092

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TiO₂改性石墨烯电极电吸附去除污水中NH₄⁺

能源和环境工程 | 更新时间：2026-07-24

- TiO₂改性石墨烯电极电吸附去除污水中NH₄⁺
- Removal of ammonium ions in wastewater by electrosorption with TiO₂ modified graphene electrode
- 化工学报 2020年71卷第11期页码：5309-5319
- 作者机构：
  
  1.生态环境部南京环境科学研究所，江苏南京 210042
  2.河海大学环境学院，江苏南京 210098
- 作者简介：
  
  皋海岭（1995—），女，硕士研究生，2195223166@qq.com
  徐斌（1988—），男，博士，助理研究员，xubinnies@163.com
- 基金信息：
  
  江苏省自然科学基金青年科学基金项目(BK20170111);江苏省科协青年科技人才托举工程;国家自然科学基金青年科学基金项目(51808251);水体污染控制与治理科技重大专项项目(2017ZX07203-004)
- DOI：10.11949/0438-1157.20200092
  中图分类号： X 703.1
- 收稿：2020-01-20，
  
  修回：2020-06-12，
  
  网络首发：2020-11-03，
  
  纸质出版：2020-11-05
- 稿件说明：
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皋海岭, 徐斌, 高月香, 朱月明, 张松贺, 张毅敏. TiO₂改性石墨烯电极电吸附去除污水中NH₄⁺[J]. 化工学报, 2020, 71(11): 5309-5319 DOI: 10.11949/0438-1157.20200092.

GAO Hailing, XU Bin, GAO Yuexiang, ZHU Yueming, ZHANG Songhe, ZHANG Yimin. Removal of ammonium ions in wastewater by electrosorption with TiO₂ modified graphene electrode[J]. CIESC Journal, 2020, 71(11): 5309-5319 DOI: 10.11949/0438-1157.20200092.
皋海岭, 徐斌, 高月香, 朱月明, 张松贺, 张毅敏. TiO₂改性石墨烯电极电吸附去除污水中NH₄⁺[J]. 化工学报, 2020, 71(11): 5309-5319 DOI: 10.11949/0438-1157.20200092. DOI：

GAO Hailing, XU Bin, GAO Yuexiang, ZHU Yueming, ZHANG Songhe, ZHANG Yimin. Removal of ammonium ions in wastewater by electrosorption with TiO₂ modified graphene electrode[J]. CIESC Journal, 2020, 71(11): 5309-5319 DOI: 10.11949/0438-1157.20200092. DOI：

摘要

通过水热法制备得到TiO

改性石墨烯复合材料（RGO/TiO

），考察了其形貌结构和电化学性能。将其组装成电极，对比未改性石墨烯（RGO）电极和RGO/TiO

电极的电吸附NH

性能。重点考察外加电压、循环流速、初始浓度等工艺参数对RGO/TiO

电极电吸附NH

的影响，并对其电吸附NH

特性和对模拟实际含NH

废水深度脱NH

效果进行研究。结果表明：RGO/TiO

复合材料具有三维孔洞结构，比表面积为382.08 m

·g

-1

，比电容量在扫速为0.01 V·s

-1

时达到325.80 F·g

-1

，优于RGO材料。RGO/TiO

电极的初次电吸附量较RGO电极提升了28.3%，循环再生吸附10次后，RGO/TiO

电极的NH

吸附量仅降低了5.87%，循环再生吸附性能优于RGO电极。外加电压2.0 V、循环流速35 ml·min

-1

和NH

初始浓度1.0 mmol·L

-1

为RGO/TiO

电极的最佳NH

电吸附条件。RGO和RGO/TiO

电极电吸附NH

过程符合准一级动力学模型和Freundlich等温吸附模型，电吸附NH

为非均匀表面的多层吸附行为，以物理吸附为主。RGO/TiO

电极4级串联时对模拟实际含NH

炼油净化水的去除率达到86.84%。

Abstract

In this study

the TiO

modified graphene composite material (RGO/ TiO

) was prepared by hydrothermal method

and its morphological structure and electrochemical properties were investigated. Then RGO/TiO

material was assembled into electrode

and NH

ions electrosorption efficiencies of unmodified graphene (RGO) electrode and the RGO/TiO

electrode were compared. The effects of applied voltage

circulating velocity and initial concentration on NH

ions electrosorption by RGO/TiO

electrode were investigated. The characteristics of NH

ions electrosorption and the effect of advanced NH

ions removal from simulated actual wastewater containing NH

ions were also studied. The results showed that the RGO/TiO

composite material had a three-dimensional pore structure with specific surface area of 382.08 m

·g

-1

and specific capacitance of 325.80 F·g

-1

at a scan rate of 0.01 V·s

-1

which were better than those of the RGO material. The initial adsorption capacity of RGO/TiO

electrode was 28.3% higher than that of RGO electrode. After 10 cycles of regeneration adsorption

the adsorption capacity of NH

ions of RGO/TiO

electrode only decreased 5.87%

and its cyclic regeneration adsorption property was better than that of RGO electrode. In addition

the applied voltage 2.0 V

circulating velocity 35 ml·min

-1

and initial concentration 1.0 mmol·L

-1

were the optimal NH

ions electrosorption conditions for RGO/TiO

electrode. The electrosorption process of NH

ions by RGO and RGO/TiO

electrodes was in accordance with the quasi-first-order kinetic model and the Freundlich isothermal adsorption model. The electrosorption of NH

ions was a multi-layer adsorption behavior on heterogeneous surface and physical adsorption was the dominant. When the RGO/TiO

electrode was connected in 4-stage series

the removal efficiency of simulated actual NH

refining purified water reached 86.84%.

关键词

Keywords

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