辽宁工业大学学报(自然科学版)
遼寧工業大學學報(自然科學版)
료녕공업대학학보(자연과학판)
Journal of Liaoning Institute of Technology (Natural Science Edition)
2015年
6期
380-383
,共4页
水热合成法%Bi2O3%TiO2%硅钨酸%光催化
水熱閤成法%Bi2O3%TiO2%硅鎢痠%光催化
수열합성법%Bi2O3%TiO2%규오산%광최화
hydrothermal synthesis,bismuth oxide%titanium dioxide%silicotungstic acid%photocatalytic activity
采用水热合成法制备了硅钨酸掺杂的纳米Bi 2 O 3/TiO 2复合粉体。对样品进行了XRD、TEM、FT-IR、UV-vis表征,以样品在紫外灯下对水中罗丹明B的降解性能为指标,评价了其光催化性能。研究结果表明,硅钨酸掺杂使样品的光催化性能逐渐降低,当硅钨酸掺杂量为(Ti+Bi)的0.5%(mol/mol),光催化性能又有提高;硅钨酸掺杂后纳米粉体出现团聚现象,继续增加原料中的硅钨酸,团聚现象逐渐明显,样品中晶体的增长速度加快,颗粒团聚现象加重;样品不易吸附水,不易羟基化,掺杂后纳米复合粉体的红外吸收峰均有部分蓝移,M-O-M(M为Bi或Ti)键强度逐渐增强。
採用水熱閤成法製備瞭硅鎢痠摻雜的納米Bi 2 O 3/TiO 2複閤粉體。對樣品進行瞭XRD、TEM、FT-IR、UV-vis錶徵,以樣品在紫外燈下對水中囉丹明B的降解性能為指標,評價瞭其光催化性能。研究結果錶明,硅鎢痠摻雜使樣品的光催化性能逐漸降低,噹硅鎢痠摻雜量為(Ti+Bi)的0.5%(mol/mol),光催化性能又有提高;硅鎢痠摻雜後納米粉體齣現糰聚現象,繼續增加原料中的硅鎢痠,糰聚現象逐漸明顯,樣品中晶體的增長速度加快,顆粒糰聚現象加重;樣品不易吸附水,不易羥基化,摻雜後納米複閤粉體的紅外吸收峰均有部分藍移,M-O-M(M為Bi或Ti)鍵彊度逐漸增彊。
채용수열합성법제비료규오산참잡적납미Bi 2 O 3/TiO 2복합분체。대양품진행료XRD、TEM、FT-IR、UV-vis표정,이양품재자외등하대수중라단명B적강해성능위지표,평개료기광최화성능。연구결과표명,규오산참잡사양품적광최화성능축점강저,당규오산참잡량위(Ti+Bi)적0.5%(mol/mol),광최화성능우유제고;규오산참잡후납미분체출현단취현상,계속증가원료중적규오산,단취현상축점명현,양품중정체적증장속도가쾌,과립단취현상가중;양품불역흡부수,불역간기화,참잡후납미복합분체적홍외흡수봉균유부분람이,M-O-M(M위Bi혹Ti)건강도축점증강。
Nanometer composite powders of bismuth oxide and titanium dioxide were prepared by the hydrothermal method, which were doped by silicotungstic acid. The samples were characterized by XRD, TEM, FT-IR and UV-vis, meanwhile, the photocatalytic performance of the samples was estimated by degrading rhodamine B solution under irradiation of UV-lamp. When the samples are doped with silicotungstic acid, the photocatalytic performances of the samples decrease. At doped mole ratio of 0.5% (Ti+Bi), photocatalytic performance increases and agglomeration begins to emerge. Doped with silicotungstic acid, the growing velocity of the crystal is rapid and the agglomeration is serious, and the crystals are hard to absorb water and to be hydroxylated. When compound powders is doped with silicotungstic acid, the nano composite powder infrared absorption peaks are part of blue shift and the intensity of M-O-M (M is Bi or Ti) becomes strong gradually after doping.