L. Pei, Chenxu Feng, Qianmin Cong, F. Tao, Jiong Zhou, Zizhan Sun
{"title":"Preparation of La2O3-modified BaSn Composite Nanorods and Photocatalytic Properties toward Crystal Violet","authors":"L. Pei, Chenxu Feng, Qianmin Cong, F. Tao, Jiong Zhou, Zizhan Sun","doi":"10.2174/2210681213666230428113045","DOIUrl":null,"url":null,"abstract":"\n\nThe separation efficiency of the electron and hole pairs of the BaSn composite\nnanorods is limited due to a wide band gap energy restricting the photocatalytic treatment ability of the\ncomposite nanorods. It is an efficient route to improve the photocatalytic properties of the semiconductor\nphotocatalysts by La2O3 modification.\n\n\n\nThis study aims to synthesize La2O3-modified BaSn composite nanorods through a simple\nmethod and research the photocatalytic performance of the La2O3-modified BaSn composite nanorods for\ncrystal violet degradation.\n\n\n\nLa2O3 modified BaSn composite nanorods were synthesized by a facile method using lanthanum acetate as the lanthanum raw material and evaluated by electron microscopy, solid diffuse reflectance spectra, X-ray diffraction, photoluminescence and photocatalytic measurement for crystal violet\ndegradation under ultraviolet light irradiation.\n\n\n\nBaSn composite nanorods consist of orthorhombic SnO2, monoclinic BaSn(OH)6, and monoclinic Ba(OH)2. La2O3 suppresses the growth of the monoclinic BaSn(OH)6, and orthorhombic SnO2. The\nLa2O3-modified BaSn composite nanorods possess coarse surface covered with the La2O3 nanoscale particles with an average size of about 50 nm. The absorption edge red-shifts to 373 nm and the band gap\nenergy reaches 3.32 eV of the La2O3 modified BaSn composite nanorods compared with the BaSn composite nanorods. 20 mL 10 mg·L-1 crystal violet solution can be entirely removed by 20 mg composite\nnanorods with 15wt.% La2O3 content under ultraviolet light irradiated for 120 min. The reaction rate constant is 2.4 times higher than that of the non-modified composite nanorods. Hydroxyl radicals and holes\nare the reaction active substances for crystal violet degradation in the composite nanorod reaction system.\n\n\n\nLa2O3 modification decreases the band gap energy, enhances the light absorption ability, and\nsuppresses the recombination of the electron and hole pairs of the composite nanorods.\n","PeriodicalId":38913,"journal":{"name":"Nanoscience and Nanotechnology - Asia","volume":"17 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nanoscience and Nanotechnology - Asia","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2174/2210681213666230428113045","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Engineering","Score":null,"Total":0}
引用次数: 0
Abstract
The separation efficiency of the electron and hole pairs of the BaSn composite
nanorods is limited due to a wide band gap energy restricting the photocatalytic treatment ability of the
composite nanorods. It is an efficient route to improve the photocatalytic properties of the semiconductor
photocatalysts by La2O3 modification.
This study aims to synthesize La2O3-modified BaSn composite nanorods through a simple
method and research the photocatalytic performance of the La2O3-modified BaSn composite nanorods for
crystal violet degradation.
La2O3 modified BaSn composite nanorods were synthesized by a facile method using lanthanum acetate as the lanthanum raw material and evaluated by electron microscopy, solid diffuse reflectance spectra, X-ray diffraction, photoluminescence and photocatalytic measurement for crystal violet
degradation under ultraviolet light irradiation.
BaSn composite nanorods consist of orthorhombic SnO2, monoclinic BaSn(OH)6, and monoclinic Ba(OH)2. La2O3 suppresses the growth of the monoclinic BaSn(OH)6, and orthorhombic SnO2. The
La2O3-modified BaSn composite nanorods possess coarse surface covered with the La2O3 nanoscale particles with an average size of about 50 nm. The absorption edge red-shifts to 373 nm and the band gap
energy reaches 3.32 eV of the La2O3 modified BaSn composite nanorods compared with the BaSn composite nanorods. 20 mL 10 mg·L-1 crystal violet solution can be entirely removed by 20 mg composite
nanorods with 15wt.% La2O3 content under ultraviolet light irradiated for 120 min. The reaction rate constant is 2.4 times higher than that of the non-modified composite nanorods. Hydroxyl radicals and holes
are the reaction active substances for crystal violet degradation in the composite nanorod reaction system.
La2O3 modification decreases the band gap energy, enhances the light absorption ability, and
suppresses the recombination of the electron and hole pairs of the composite nanorods.
期刊介绍:
Nanoscience & Nanotechnology-Asia publishes expert reviews, original research articles, letters and guest edited issues on all the most recent advances in nanoscience and nanotechnology with an emphasis on research in Asia and Japan. All aspects of the field are represented including chemistry, physics, materials science, biology and engineering mainly covering the following; synthesis, characterization, assembly, theory, and simulation of nanostructures (nanomaterials and assemblies, nanodevices, nano-bubbles, nano-droplets, nanofluidics, and self-assembled structures), nanofabrication, nanobiotechnology, nanomedicine and methods and tools for nanoscience and nanotechnology.