化学研究与应用
化學研究與應用
화학연구여응용
CHEMICAL RESEARCH AND APPLICATION
2014年
5期
641-646
,共6页
绒线团状Bi2 WO6%光催化降解%亮绿SF淡黄%动力学
絨線糰狀Bi2 WO6%光催化降解%亮綠SF淡黃%動力學
융선단상Bi2 WO6%광최화강해%량록SF담황%동역학
the regular wool ball-like Bi2 WO6 photocatalyst%photocatalysis degradation%light green SF yellowish%Dynamics
本文以Na2WO4·2H2O和Bi(NO3)3·5H2O为原料,采用水热法合成Bi2WO6光催化剂,利用XRD、SEM对Bi2 WO6光催化剂的形貌及晶型进行了表征,结果表明,180℃/6h 条件下合成的Bi2 WO6光催化剂的结晶度良好,具有Bi2 WO6特征峰,为规则层状多孔疏松绒线团状Bi2 WO6,平均晶粒尺寸为0．283nm。以亮绿SF淡黄为目标降解染料,考察绒线团状Bi2 WO6光催化剂光催化性能,研究绒线团状Bi2 WO6光催化剂吸附和光催化降解染料的动力学规律,并探讨绒线团状Bi2 WO6光催化剂投加量、不同光源、染料溶液的初始浓度、反应时间等因素对亮绿SF淡黄吸附和光催化降解的影响。实验结果表明：在298K,pH=7,绒线团状Bi2 WO6用量为2g/L,亮绿SF淡黄的初始浓度为5mg·L-1,以氙灯(300W)为光源,搅拌2h,亮绿 SF 淡黄降解率达90．2%。绒线团状Bi2 WO6可见光降解亮绿SF淡黄符合一级反应速率动力学方程。
本文以Na2WO4·2H2O和Bi(NO3)3·5H2O為原料,採用水熱法閤成Bi2WO6光催化劑,利用XRD、SEM對Bi2 WO6光催化劑的形貌及晶型進行瞭錶徵,結果錶明,180℃/6h 條件下閤成的Bi2 WO6光催化劑的結晶度良好,具有Bi2 WO6特徵峰,為規則層狀多孔疏鬆絨線糰狀Bi2 WO6,平均晶粒呎吋為0．283nm。以亮綠SF淡黃為目標降解染料,攷察絨線糰狀Bi2 WO6光催化劑光催化性能,研究絨線糰狀Bi2 WO6光催化劑吸附和光催化降解染料的動力學規律,併探討絨線糰狀Bi2 WO6光催化劑投加量、不同光源、染料溶液的初始濃度、反應時間等因素對亮綠SF淡黃吸附和光催化降解的影響。實驗結果錶明：在298K,pH=7,絨線糰狀Bi2 WO6用量為2g/L,亮綠SF淡黃的初始濃度為5mg·L-1,以氙燈(300W)為光源,攪拌2h,亮綠 SF 淡黃降解率達90．2%。絨線糰狀Bi2 WO6可見光降解亮綠SF淡黃符閤一級反應速率動力學方程。
본문이Na2WO4·2H2O화Bi(NO3)3·5H2O위원료,채용수열법합성Bi2WO6광최화제,이용XRD、SEM대Bi2 WO6광최화제적형모급정형진행료표정,결과표명,180℃/6h 조건하합성적Bi2 WO6광최화제적결정도량호,구유Bi2 WO6특정봉,위규칙층상다공소송융선단상Bi2 WO6,평균정립척촌위0．283nm。이량록SF담황위목표강해염료,고찰융선단상Bi2 WO6광최화제광최화성능,연구융선단상Bi2 WO6광최화제흡부화광최화강해염료적동역학규률,병탐토융선단상Bi2 WO6광최화제투가량、불동광원、염료용액적초시농도、반응시간등인소대량록SF담황흡부화광최화강해적영향。실험결과표명：재298K,pH=7,융선단상Bi2 WO6용량위2g/L,량록SF담황적초시농도위5mg·L-1,이선등(300W)위광원,교반2h,량록 SF 담황강해솔체90．2%。융선단상Bi2 WO6가견광강해량록SF담황부합일급반응속솔동역학방정。
In this paper,A type of visible light photocatalyst Bi2WO6 was synthesized from Bi(NO3)3·5H2O and Na2WO4·2H2O by means of hydrothermal method. The morphology and Crystal Structure of regular wool ball-like Bi2 WO6 photocatalyst were character-ized by XRD and SEM. The characterization results show that:in the synthetic conditions of 180℃/6h,the Bi2 WO6 photocatalyst get a good crystallinity,showing a characteristic peak of Bi2 WO6 and mean grain size is 0. 283 nm. Light green SF yellowish is being used as the target dyestuff to investigate the photocatalysis properties,the dynamics law of adsorption and degradation of wool ball-like Bi2 WO6 photocatalyst. At the same time,the effect of dosage of photocatalyst,difference light source,the initial concentration of dyestuff solution and reaction time to the adsorption and degradation of light green SF yellowish are also being investigated. The ex-periment results show that at condition of 298K,pH=7,the dosage of the regular wool ball-like Bi2 WO6 photocatalyst is 2g/L,agita-ting 2 hour under the xenon lamp light(300W)the degradation rate of Rhodamine B is 90. 2%. The dynamic behavior of the regular wool ball-like Bi2 WO6 photocatalyst degrading the light green SF yellowish agrees with the first-order rate dynamic equation.
