Lin, Y.-T.Y.-T.LinWang, Y.-H.Y.-H.WangWu, J.C.S.J.C.S.WuWang, X.X.WangJEFFREY CHI-SHENG WU2021-02-042021-02-042021https://www.scopus.com/inward/record.url?eid=2-s2.0-85090582164&partnerID=40&md5=d00f8064cd19d4ff4d1fe47094cb5702https://scholars.lib.ntu.edu.tw/handle/123456789/546408This research investigated photo-Fenton enhanced in a twin-reactor for hydrogen evolution and wastewater photodegradation simultaneously. The twin-reactor, which was two coupled reactors divided by a membrane, can simultaneously photodegrade isopropanol wastewater and separate hydrogen from water splitting. Fe2+/Fe3+ pair was used as electron mediator in the twin reactor by counter-diffusing between hydrogen and photodegradation sides. Moreover, Fe3+ also triggered photo-Fenton reaction to enhance the degradation of organic wastewater. SrTiO3:Rh, Pt/SrTiO3:Rh and Ru/SrTiO3:Rh were used for hydrogen evolution. For isopropanol degradation, P25 (TiO2) and WO3 were applied. The light source was simulated sunlight using 300 W Xe lamps with AM1.5 filter. Compared with the single reactor, the isopropanol removal increased 125% and hydrogen evolution was up 37% due to H2 separation and inhibition of reverse reaction of water splitting. In the twin reactor, 95% of pure hydrogen was obtained in the hydrogen evolution side, thus saved the cost of afterward purification. © 2020 Elsevier B.V.Fe2+/Fe3+pair; hydrogen; isopropanol degradation; photocatalysis; water splitting[SDGs]SDG6[SDGs]SDG7Hydrogen; Light sources; Oxidation; Oxide minerals; Separation; Strontium titanates; Titanium dioxide; Tungsten compounds; Coupled reactors; Electron mediator; Hydrogen evolution; Hydrogen separation; Organic wastewater; Photo-Fenton reactions; Reverse reactions; Simulated sunlight; Image enhancementjournal article10.1016/j.apcatb.2020.1195172-s2.0-85090582164