钨酸铋纳米片光催化剂的制备以及四环素类抗生素降解性能研究
|
摘要
以偏钨酸铵以及五水合硝酸铋为原料,采用水热合成法获得了钨酸铋光催化剂。利用X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)等方法研究了该光催化材料的结构、表面特征。以兽药用四环素水溶液作为目标溶液,在可见光照射的条件下,探究了钨酸铋对四环素水溶液的光催化降解性能。实验结果表明,制备的钨酸铋为薄片状的纳米结构,比表面积大,为光催化提供了大量的活性位点。在2h的可见光辐射下,投放量为200mg/L的钨酸铋对浓度为30mg/L四环素水溶液的光催化降解率达80%,该光催化降解反应为动力学一级反应。另外,多次回收钨酸铋重复实验结果显示钨酸铋的催化效率没有明显下降,钨酸铋对四环素的光降解有优异的催化效果,并具有较高的回用价值。
Bismuth tungstate photocatalyst was obtained by hydrothermal synthesis by using ammonium tungstate and five bismuth nitrate as raw materials. The structure and surface characteristics of the photocatalytic materials were studied by X ray diffraction( XRD),scanning electron microscopy( SEM) and transmission electron microscopy( TEM). The photocatalytic degradation performance of bismuth tungstate on tetracycline aqueous solution was investigated under the condition of visible light irradiation,using veterinary drug tetracycline solution as the target solution. The experimental results showed that the prepared bismuth tungstate was a thin film nanostructure with large surface area,providing a large number of active sites for photocatalysis. Under visible light irradiation of 2 h,the photocatalytic degradation rate of bismuth tungstate of 200 mg/L to tetracycline aqueous solution of 30 mg/L was80%. The photocatalytic degradation reaction is a first-order kinetic reaction. In addition,repeated recovery experiments of bismuth tungstate have shown that the catalytic efficiency of bismuth tungstate has no significant decrease. Bismuth tungstate has excellent catalytic effect on the photodegradation of tetracycline and has high reutilization value.
Bismuth tungstate photocatalyst was obtained by hydrothermal synthesis by using ammonium tungstate and five bismuth nitrate as raw materials. The structure and surface characteristics of the photocatalytic materials were studied by X ray diffraction( XRD),scanning electron microscopy( SEM) and transmission electron microscopy( TEM). The photocatalytic degradation performance of bismuth tungstate on tetracycline aqueous solution was investigated under the condition of visible light irradiation,using veterinary drug tetracycline solution as the target solution. The experimental results showed that the prepared bismuth tungstate was a thin film nanostructure with large surface area,providing a large number of active sites for photocatalysis. Under visible light irradiation of 2 h,the photocatalytic degradation rate of bismuth tungstate of 200 mg/L to tetracycline aqueous solution of 30 mg/L was80%. The photocatalytic degradation reaction is a first-order kinetic reaction. In addition,repeated recovery experiments of bismuth tungstate have shown that the catalytic efficiency of bismuth tungstate has no significant decrease. Bismuth tungstate has excellent catalytic effect on the photodegradation of tetracycline and has high reutilization value.
引文
[1]赵涛,丘锦荣,蒋成爱,等.水环境中磺胺类抗生素的污染现状与处理技术研究进展[J].环境污染与防治,2017,39(10):1147-1152.
[2]罗晓,郝彤遥,赵彦,等.石墨烯基S掺杂Ti O2光催化降解罗红霉素的研究[J].煤炭与化工,2016(10):1-7.
[3]张帆,柴凤兰,李敬,等.钨酸铋对四环素光催化降解性能[J].化学研究,2017,28(3):331-334.
[4]李红章,刘新华,吴筱.钨酸铋光催化剂制备及改性的研究进展[J].安徽化工,2013,39(5):1-4.
[5]宋丽花,谈国强,郑玉芹,等.Bi2WO6粉体光催化剂的制备方法及研究进展[J].陕西科技大学学报,2012,30(1):122-125.
[6]李荣荣,姜恒,宫红,等.g-C3N4的制备及其对不同染料光催化降解性能研究[J].应用化学,2016(09):1700-1704.
[7]阎鑫,惠小艳,闫从祥,等.类石墨相氮化碳二维纳米片的制备及可见光催化性能研究[J].材料导报,2017,31(05):77-80.
[8]刘琪,李燕,王孝辉,等.类石墨结构氮化碳的制备及光催化降解造纸废水的研究[J].齐鲁工业大学学报,2016,30(02):07-11.
[9]崔艳丽.Bi2WO6/TiO2微纳米材料的制备及其光催化性能[D].长春工业大学,2016.
[10]张宇航,邹学军,杨宝灵,等.不同p H值条件合成纳米Bi2WO6及其可见光下活性研究[J].水资源与水工程学报,2017,28(05):106-111.
[11]刘新华,李红章,田麒胜,等.新型可见光催化剂钨酸铋/腈纶复合纤维的研究[J].化工新型材料,2013,41(10):110-111.
[2]罗晓,郝彤遥,赵彦,等.石墨烯基S掺杂Ti O2光催化降解罗红霉素的研究[J].煤炭与化工,2016(10):1-7.
[3]张帆,柴凤兰,李敬,等.钨酸铋对四环素光催化降解性能[J].化学研究,2017,28(3):331-334.
[4]李红章,刘新华,吴筱.钨酸铋光催化剂制备及改性的研究进展[J].安徽化工,2013,39(5):1-4.
[5]宋丽花,谈国强,郑玉芹,等.Bi2WO6粉体光催化剂的制备方法及研究进展[J].陕西科技大学学报,2012,30(1):122-125.
[6]李荣荣,姜恒,宫红,等.g-C3N4的制备及其对不同染料光催化降解性能研究[J].应用化学,2016(09):1700-1704.
[7]阎鑫,惠小艳,闫从祥,等.类石墨相氮化碳二维纳米片的制备及可见光催化性能研究[J].材料导报,2017,31(05):77-80.
[8]刘琪,李燕,王孝辉,等.类石墨结构氮化碳的制备及光催化降解造纸废水的研究[J].齐鲁工业大学学报,2016,30(02):07-11.
[9]崔艳丽.Bi2WO6/TiO2微纳米材料的制备及其光催化性能[D].长春工业大学,2016.
[10]张宇航,邹学军,杨宝灵,等.不同p H值条件合成纳米Bi2WO6及其可见光下活性研究[J].水资源与水工程学报,2017,28(05):106-111.
[11]刘新华,李红章,田麒胜,等.新型可见光催化剂钨酸铋/腈纶复合纤维的研究[J].化工新型材料,2013,41(10):110-111.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |