Photocatalytic activity of metal nanoparticle-decorated titanium dioxide for simultaneous H_(2) production and biodiesel wastewater remediation  

作　　者：Patsakol Prayoonpunratn Trin Jedsukontorn Mali Hunsom 

机构地区：[1]Fuels Research Center,Department of Chemical Technology,Faculty of Science,Chulalongkorn University,Bangkok 10330,Thailand [2]Current address:Department of Chemical Engineering,Faculty of Engineering,Mahidol University,Nakorn Pathom 73170,Thailand [3]Associate Fellow of Royal Society of Thailand(AFRST),Bangkok 10300,Thailand

出　　处：《Chinese Journal of Chemical Engineering》2021年第8期86-100,共15页中国化学工程学报（英文版）

摘　　要：A set of metal nanoparticle-decorated titanium dioxide(Mx/TiO_(2);where x is the percent by mass,%)photocatalysts was prepared via the sol-immobilization in order to enhance the simultaneous hydrogen(H_(2))production and pollutant reduction from real biodiesel wastewater.Effect of the metal nanoparticle(NP)type(M=Ni,Au,Pt or Pd)and,for Pd,the amount(1%–4%)decorated on the surface of thermal treated commercial TiO_(2)(T_(400))was evaluated.The obtained results demonstrated that both the type and amount of decorated metal NPs did not significantly affect the pollutant reduction,measured in terms of the reduction of chemical oxygen demand(COD),biological oxygen demand(BOD)and oil&grease levels,but they affected the H_(2) production rate from both deionized water and biodiesel wastewater,which can be ranked in the order of Pt_(1)/T_(400)>Pd_(1)/T_(400)>Au_(1)/T_(400)>Ni_(1)/T_(400).This was attributed to the high difference in work function between Pt and the parent T400.However,the difference between Pt1/T400 and Pd1/T400 was not great and so from an economic consideration,Pd/TiO_(2) was selected as appropriate for further evaluation.Among the four different Pdx/TiO_(2) photocatalysts,the Pd3/TiO_(2) demonstrated the highest activity and gave a high rate of H_(2) production(up to 135 mmol·h−1)with a COD,BOD and oil&grease reduction of 30.3%,73.7%and 58.0%,respectively.

关 键 词：Hydrogen production WASTEWATER REMEDIATION PHOTOCHEMISTRY Metal nanoparticle-decorated titanium dioxide 

分 类 号：TQ426[化学工程] X703[环境科学与工程—环境工程] TQ116.2