气候变化领域集成服务门户(CCPortal): Solar desalination coupled with water remediation and molecular hydrogen production: A novel solar water-energy nexus

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DOI	10.1039/c7ee02640d
	Solar desalination coupled with water remediation and molecular hydrogen production: A novel solar water-energy nexus
	Kim S.; Piao G.; Han D.S.; Shon H.K.; Park H.
发表日期	2018
ISSN	17545692
起始页码	344
结束页码	353
卷号	11 期号:2
英文摘要	A novel sunlight-water-energy nexus technology is presented that combines the photoelectrocatalytic (PEC) desalination of saline water and desalination-driven wastewater remediation coupled with the production of molecular hydrogen (H2) from water. To accomplish this, morphologically tailored TiO2 nanorod (TNR) and hydrogen-treated TNR (H-TNR) array photoanodes are placed in an anode cell and Pt foils are located in a cathode cell, while a middle cell containing saline water (0.17 M NaCl) faces these cells through anion and cation exchange membranes, respectively. Upon irradiation by simulated sunlight (AM 1.5G, 100 mW cm-2), the photogeneration of charge carriers initiates the transport of chloride and sodium in the middle cell to the anode and cathode cells, respectively, leading to the desalination of saline water. The chloride in the anode cell is converted to reactive chlorine species (RCS), which effectively decompose urea to N2 as a primary product (>80%), while the sodium in the cathode cell accelerates the H2 production from water with a Faradaic efficiency of ∼80%. The PEC performance of the H-TNR photoanodes is superior to that of the TNR in the anodic and cathodic processes because of the reduced charge transfer resistance and sub-nanosecond charge transfer kinetics (∼0.19 ns), leading to a specific energy consumption of 4.4 kW h m-3 for 50% desalination, with an energy recovery of ∼0.8 kW h m-3. The hybrid system is found to operate for a period of ∼60 h with natural seawater, and virtually all the photoanodes are shown to be capable of driving the hybrid process. Although tested as a proof-of-concept, the present technology opens up a novel field involving a sunlight-water-energy nexus, promising high efficiency desalination and the desalination-driven remediation of water with simultaneous H2 production. © 2018 The Royal Society of Chemistry.
英文关键词	Anodes; Cathodes; Cells; Charge transfer; Chlorine compounds; Cytology; Desalination; Electrodes; Energy utilization; Hybrid systems; Hydrogen production; Molecular physics; Nanorods; Nitrogen compounds; Pollution; Sodium chloride; Solar power generation; Titanium dioxide; Urea; Cation exchange membranes; Charge transfer kinetics; Charge transfer resistance; Faradaic efficiencies; Photoelectrocatalytic; Solar desalination; Specific energy consumption; Wastewater remediation; Saline water; catalysis; desalination; energy efficiency; fuel cell; hydrogen; ion exchange; irradiation; molecular analysis; reaction kinetics; remediation; wastewater treatment
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190318
作者单位	School of Energy Engineering, Kyungpook National University, Daegu, 41566, South Korea; Chemical Engineering Program, Texas A and M University at Qatar, Education City, P.O. Box 23874, Doha, Qatar; School of Civil and Environmental Engineering, University of Technology, Sydney, Post Box 129, Broadway, NSW 2007, Australia
推荐引用方式 GB/T 7714	Kim S.,Piao G.,Han D.S.,et al. Solar desalination coupled with water remediation and molecular hydrogen production: A novel solar water-energy nexus[J],2018,11(2).
APA	Kim S.,Piao G.,Han D.S.,Shon H.K.,&Park H..(2018).Solar desalination coupled with water remediation and molecular hydrogen production: A novel solar water-energy nexus.Energy & Environmental Science,11(2).
MLA	Kim S.,et al."Solar desalination coupled with water remediation and molecular hydrogen production: A novel solar water-energy nexus".Energy & Environmental Science 11.2(2018).