Ti/RuO2-IrO2-SnO2-Sb2O5阳极在农村饮用水消毒中的应用

doi:10.13208/j.electrochem.200909

摘要/Abstract

摘要：

采用热分解法制备了一种新型高效析氯阳极Ti/RuO₂-IrO₂-SnO₂-Sb₂O₅,将其应用于农村饮用水消毒频繁停开、低电解液浓度的特殊工况下,并与Ti/RuO₂-SnO₂-Sb₂O₅、Ti/RuO₂-TiO₂、Ti/RuO₂-TiO₂-IrO₂三种析氯阳极进行性能对比。通过SEM、EDS、XRD等方法表征测试阳极表面形貌、元素及组成,考察了氯化钠浓度、电流密度、停开频率对阳极析氯效果和寿命的影响。研究发现,Ti/RuO₂-IrO₂-SnO₂-Sb₂O₅阳极活性强、稳定性高;阳极涂层各组分高度融合为固溶体,结构致密,稳定性强;在15 g·L^-1 NaCl、400 A·m^-2电流密度、20℃条件下,Ti/RuO₂-IrO₂-SnO₂-Sb₂O₅阳极电解的电流效率达到91.55%;频繁停开、强化电解条件下寿命达到231 h,是Ti/RuO₂-TiO₂阳极的77倍,预估在400 A·m^-2电流密度下能够使用20年。

关键词: Ti/RuO₂-IrO₂-SnO₂-Sb₂O₅, 农村饮用水, 次氯酸钠发生器, 强化电解寿命

Abstract:

Sodium hypochlorite disinfection has many advantages, including reliable operation, low cost, easily available raw materials. It is, therefore, suitable for disinfection of drinking water in remote rural areas. The service life and chlorine evolution efficiency of the anode are the main factors restricting the performance of the sodium hypochlorite generator. The special conditions of frequent shutdown and low electrolyte concentration in the rural drinking water application also put forward high requirements on the performance of the anode. In this study, Ti/RuO₂-IrO₂-SnO₂-Sb₂O₅,a new-type and efficient chlorine evolution anode, was prepared by thermal decomposition method and further applied to disinfection of drinking water in rural areas. Comparison was also made between this anode with Ti/RuO₂-SnO₂-Sb₂O₅, Ti/RuO₂-TiO₂ and Ti/RuO₂-TiO₂-IrO₂ anodes. The surface morphology, elements and composition of the anodes were examined by SEM, EDS and XRD. The effects of sodium chloride concentration, current density and shutdown frequency on chlorine evolution efficiency and lifetime of the anodes were also investigated. It was found that the Ti/RuO₂-IrO₂-SnO₂-Sb₂O₅ electrode exhibited strong activity and high stability, and its coating components were highly fused into a solid solution with dense structure and great stability. The current efficiency of Ti/RuO₂-IrO₂-SnO₂-Sb₂O₅ anode reached 91.55% in 15 g·L^-1 NaCl solution at 400 A·m^-2 and 20℃. In the enhanced electrolysis lifetime experiment, the service lifetime of Ti/RuO₂-IrO₂-SnO₂-Sb₂O₅ anode reached 231 h, which was 77 times longer than that of Ti/RuO₂-TiO₂ anode. It was estimated that the Ti/RuO₂-IrO₂-SnO₂-Sb₂O₅ anode could be used for 20 years under the current density of 400 A·m^-2. Therefore, compared with the traditional electrode materials, Ti/RuO₂-IrO₂-SnO₂-Sb₂O₅ achieved higher chlorine evolution efficiency and stability. It could be used for a long time in the condition of frequent shutdown and low electrolyte concentration. Besides, it could greatly reduce the equipment operation cost, the raw material feeding frequency and the impurities introduction. Thus, the Ti/RuO₂-IrO₂-SnO₂-Sb₂O₅ anode developed in this studymight be suitable for rural drinking water disinfection application.

Key words: Ti/RuO₂-IrO₂-SnO₂-Sb₂O₅, rural drinking water, sodium hypochlorite generator, enhanced electrolytic life

郭静如, 张雪娇, 廖帅, 陈雪明. Ti/RuO₂-IrO₂-SnO₂-Sb₂O₅阳极在农村饮用水消毒中的应用[J]. 电化学（中英文）, 2021, 27(5): 549-557.

Jing-Ru Guo, Xue-Jiao Zhang, Shuai Liao, Xue-Ming Chen. Application of Ti/RuO₂-IrO₂-SnO₂-Sb₂O₅ Anode in Rural Drinking Water Disinfection[J]. Journal of Electrochemistry, 2021, 27(5): 549-557.

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链接本文: https://electrochem.xmu.edu.cn/CN/10.13208/j.electrochem.200909

https://electrochem.xmu.edu.cn/CN/Y2021/V27/I5/549

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参考文献 28

[1]	Jia Y N(贾燕南), Hu M(胡孟), Wu X M(邬晓梅), Li X Q(李晓琴), Dong C J(董长娟). Analysis on the selection and application of disinfection technology in rural water supply engineering[J]. Chin. Water Resour.(中国水利), 2016, 19: 53-56.
[2]	Cui H J(崔红军), Wu D S(吴东升), Song S Y(宋思怡), Sui H(孙辉), Zhang L M(张利梅). Study on using sodium hypochlorite to replace liquid chlorine for disinfection in waterworks[J]. Chin. Water Wastewater(中国给水排水), 2016, 32(19): 58-61.
[3]	Lian L X(李连香), Liu W C(刘文朝), Qu J F(曲钧浦), Tong W(童闻). Research on design parameters of small batch sodium hypochlorite generator[J]. Water Conser. Hy-dro. Techno.(水利水电技术), 2018, 8: 219-224.
[4]	Hu X H(胡小华). Study on chlorine evolution anode in Chlor-Alkali industry[D]. Chongqing: Chongqing Univer-sity(重庆大学), 2016.
[5]	Zhang Z X(张招贤). Titanium anode 40 years[J]. Chlor-Alkali Ind.(氯碱工业), 2007, 1: 15-20, 22.
[6]	Zeng Y, Chen K N, Wu W, Wang J R, Lee S W. Effect of IrO₂ loading on RuO₂-IrO₂-TiO₂ anodes: A study of microstructure and working life for the chlorine evolution reaction[J]. Ceram. Int., 2007, 33(6): 1087-1091. doi: 10.1016/j.ceramint.2006.03.025 URL
[7]	Wang K(王科), Han Y(韩严), Wang L Y(王雷远), Zhang X L(张晓玲), Sun Y P(孙玉璞). Study on Ru-Ti-Ir-Sn oxide anode coating in seawater electrolysis[J]. J. Electro-chem.(电化学), 2005, 11(2): 176-181.
[8]	Wang L L(王玲利), Peng Q(彭乔). Research progress on optimization of ruthenium coating titanium anode[J]. Liao-ning Chem. Ind.(辽宁化工), 2006, 8: 485-487.
[9]	Chen S Y, Zheng Y H, Wang S W, Chen X M. Ti/RuO₂-Sb₂O₅-SnO₂ electrodes for chlorine evolution from seawate[J]. Chem. Eng. J, 2011, 172(1): 47-51. doi: 10.1016/j.cej.2011.05.059 URL
[10]	Wang S W, Xu H L, Yao P D, Chen X M. Ti/RuO₂-IrO₂-SnO₂-Sb₂O₅ anodes for Cl₂ evolution from seawater[J]. Electrochemistry, 2012, 80(7): 507-511. doi: 10.5796/electrochemistry.80.507 URL
[11]	Chen X M, Chen G H, Yue P L. Stable Ti/IrO_x-Sb₂O₅-SnO₂ anode for O₂ evolution with low Ir content[J]. J. Phys. Chem. B, 2001, 105(20): 4623-4628. doi: 10.1021/jp010038d URL
[12]	El Guindy M I. Precious Metals 1982: Proceedings of the sixth international precious metals institute conference[M]. Elsevier, Amsterdam, 2013: 219-226.
[13]	Yang Y, Michael R, Homann. Synjournal and stabilization of blue-black TiO₂ nanotube arrays for electrochemical oxidant generation and wastewater treatment[J]. Environ. Sci. Technol., 2016, 50(21): 11888-11894. pmid: 27648479
[14]	Luyo C, Fabregas I, Reyes L, Solis J L, Rodriguez J, Estrada W, Candal R J. SnO₂ thin-films prepared by a spray-gel pyrolysis: Influence of Sol properties on film morphologies[J]. Thin Solid Films, 2007, 516(1): 25-33. doi: 10.1016/j.tsf.2007.05.023 URL
[15]	Comninellis C, Vercesi G P. Problems in DSA coating deposition by thermal-decomposition[J]. J. Appl. Electro-chem., 1991, 21(2): 136-142.
[16]	Li X(李雪), Xue M(薛梦), Huang L(黄令), Li J T(李君涛), Sun S G(孙世刚). Preparation of titanium-based metal oxide electrode and its ammonia nitrogen wastewater degradation performance[J]. J. Electrochem.(电化学), 2015, 21(1): 78-84.
[17]	Bi Q(毕强), Xue J Q(薛娟琴), Yu L H(于丽花), Wang C(汪丛), Yu F L(于芳蕾). Effect of lanthanum doping on electrochemical catalytic performance of Ti/Sb-SnO₂[J]. J. Chin. Rare Earth Soc.(中国稀土学报), 2013, 31(4): 465-472.
[18]	Fathollahi F, Javanbakht M, Norouzi P, Ganjali M R. Com-parison of morphology, stability and electrocatalytic properties of Ru_0.3Ti_0.7O₂ and Ru_0.3Ti_0.4Ir_0.3O₂ coated Titanium anodes[J]. Russ. J. Electrochem., 2011, 47(11): 1281-1286. doi: 10.1134/S1023193511110061 URL
[19]	Makarova M V, Jirkovsky J, Klementova M, Jirka I, Macounova K, Krtil P. The electrocatalytic behavior of Ru_0.8Co_0.2O₂-_x - the effect of particle shape and surface composition[J]. Electrochim. Acta, 2008, 53(5): 2266-2656.
[20]	Song X L(宋秀丽), Yang H M(杨慧敏), Liang Z H(梁镇海). Research progress of titanium-based oxide anode intermediate layer[J]. J. Electrochem.(电化学), 2013, 19(4): 313-321.
[21]	Liu J F(刘俊峰), Feng Y J(冯玉杰), Sun L X(孙丽欣), Qian Z G(钱正刚). Preparation and properties of Ti/SnO₂ Nano-coated electrocatalytic electrode[J]. Mater. Sci. Technol.(材料科学与工艺), 2006, 2: 200-203.
[22]	Sun M M(孙猛猛), Wang Q F(王庆法), Zou J J(邹吉军), Zhang X W(张香文). Study on failure behavior of IrO₂-SiO₂ coated titanium anode[J]. Chem. Ind. Eng.(化学工业与工程), 2014, 31(5): 8-12, 42.
[23]	Hoseinieh S M, Ashrafizadeh F, Maddahi M H. A comparative investigation of the corrosion behavior of RuO₂-IrO₂-TiO₂ coated titanium anodes in chloride solutions[J]. J. Electrochem. Soc., 2010, 157(4): 50-56. doi: 10.1149/1.3294569
[24]	Shen H(沈浩), Fan J H(樊金红), Ma L M(马鲁铭). Pre-paration of active chlorine by Ti/Pt anode electrolysis in low concentration NaCl solution[J]. J. Electrochem.(电化学), 2009, 15(2): 220-223.
[25]	Xu W C(徐万昌). Preparation of sodium hypochlorite and simulation research on its attenuation in rural water supply network[D]. Beijing: China Institute of Water Resources and Hydropower Research(中国水利水电科学研究院), 2019.
[26]	Zhang Q(张琼), Peng J H(彭俊华), Cai C R(蔡传荣). Preliminary study on the failure mechanism of titanium anode coating peeling[J]. J. Chin. Inst. Water Resour. Hydro. Res.(中国水利水电科学研究院学报), 2001, 4: 410-411.
[27]	Hou Y Y(侯艳远). Electrochemical behavior and failure characteristics of Ti/IrO₂ anode in methanol aqueous solution[D]. Hangzhou: Zhejiang University(浙江大学), 2006.
[28]	Bergmann M E H, Koparal A S. Studies on electrochemical disinfectant production using anodes containing RuO₂[J]. J. Appl. Electrochem., 2005, 35(12): 1321-1329. doi: 10.1007/s10800-005-9064-0 URL

Element	Ti	Ru	Ir	Sb	Sn
Coating liquid ratio/%	0	20	10	10	60
Atomic ratio/%	10.46	25.26	18.71	17.62	28.05

Anode	Component ratio	Current efficiency/%	Salt consumption/ (kg·kg^-1)	Energy consumption/（kW·h·kg^-1）	Aging life/ h
Ti/RuO₂-SnO₂-Sb₂O₅	20:10:70	89.32	13.7	1.63	68
Ti/RuO₂-TiO₂	70:30	84.85	14.9	1.81	3
Ti/RuO₂-IrO₂-TiO₂	20:10:70	87.08	14.3	1.69	49
Ti/RuO₂-IrO₂-SnO₂-Sb₂O₅	20:10:10:60	91.55	13.1	1.47	231

Ti/RuO₂-IrO₂-SnO₂-Sb₂O₅阳极在农村饮用水消毒中的应用

Application of Ti/RuO₂-IrO₂-SnO₂-Sb₂O₅ Anode in Rural Drinking Water Disinfection

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