title: Different nanostructured In₂O₃ for photocatalytic decomposition of perfluorooctanoic acid (PFOA).
abstract: Perfluorooctanoic acid (PFOA), an emerging persistent organic pollutant, recently receives worldwide concerns including methods for its efficient decomposition. Three kinds of nanostructured In₂O₃ materials including porous microspheres, nanocubes and nanoplates were obtained by dehydration of the corresponding In(OH)₃ nanostructures at 500 °C for 2 h. The In(OH)₃ nanostructures with different morphologies were solvothermally synthesized by using different mixed solvents. As-obtained In₂O₃ nanomaterials showed great photocatalytic activity for PFOA decomposing. The decomposition rates of PFOA by different In₂O₃ materials, i.e. porous microspheres, nanoplates and nanocubes were 74.7, 41.9 and 17.3 times as fast as that by P25 TiO2, respectively. The In₂O₃ porous microspheres showed the highest activity, by which the half-life of PFOA was shortened to 5.3 min. The roles of surface oxygen vacancies on the adsorption and photocatalytic decomposition of PFOA were discussed, and it was found that In₂O₃ materials with higher oxygen vacancy defects show better activity.
authors.affiliation: State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
authors.forename: Zhenmin
authors.initials: Z
authors.lastname: Li
authors.forename: Pengyi
authors.initials: P
authors.lastname: Zhang
authors.forename: Tian
authors.initials: T
authors.lastname: Shao
authors.forename: Jinlong
authors.initials: J
authors.lastname: Wang
authors.forename: Ling
authors.initials: L
authors.lastname: Jin
authors.forename: Xiaoyun
authors.initials: X
authors.lastname: Li
mesh_terms: D002210:Caprylates / Q000032:analysis / Q000737:chemistry*; D002384:Catalysis; D004785:Environmental Pollutants; D005466:Fluorocarbons / Q000032:analysis / Q000737:chemistry*; D007204:Indium / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D008863:Microspheres; D053758:Nanoparticles / Q000737:chemistry; D036103:Nanotechnology; D010100:Oxygen / Q000737:chemistry; D010782:Photolysis; D016062:Porosity; D011312:Pressure; D012997:Solvents / Q000737:chemistry; D013696:Temperature; D013997:Time Factors; D014873:Water Pollutants / Q000032:analysis; D014961:X-Ray Diffraction
chemical_list: D002210:Caprylates; D004785:Environmental Pollutants; D005466:Fluorocarbons; D012997:Solvents; D014873:Water Pollutants; D007204:Indium; C047711:indium oxide; C023036:perfluorooctanoic acid; D010100:Oxygen
keywords: Indium oxide; Nanostructure; Perfluorooctanoic acid; Photocatalysis; Solvothermal process