中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > CNC负载ZnO纳米复合材料的吸附-光催化性能 林业工程学报 2020 (3) 29-35
Position: Home > Articles > Adsorption-photocatalytic properties of cellulose nanocrystal supported ZnO nanocomposites Journal of Forestry Engineering 2020 (3) 29-35

CNC负载ZnO纳米复合材料的吸附-光催化性能

作  者：
张隐;魏留洋;卢利明;甘露;潘明珠
单  位：
上海富美家装饰材料有限公司;南京林业大学材料科学与工程学院
关键词：
ZnO;纤维素纳米晶;生物质炭;吸附;光催化
摘  要：
以醋酸锌为原料、硫酸水解的纤维素纳米晶(CNC)为模板,通过沉淀法制备CNC负载ZnO纳米复合材料(CNC/ZnO),并进一步经550℃处理,得到CNC/ZnO的碳化产物(C-CNC/ZnO)。采用透射电子显微镜(TEM)、X射线衍射仪(XRD)、傅里叶红外光谱仪(FT-IR)、紫外可见漫反射吸收光谱(UV-Vis DRS)对其形貌结构、晶体结构、化学结构和光吸收性能进行表征,并测试其对亚甲基蓝(MB)染料的吸附-光催化性能。结果表明:CNC/ZnO纳米复合材料中,ZnO通过静电作用附着于CNC上,呈棒状及纵横交错排列,分散性得到显著提高;经550℃碳化后,ZnO仍以棒状排列方式沉积于碳化CNC上,排列方式未发生变化。引入CNC模板及碳化处理对ZnO晶体结构及光吸收性能产生重要影响,CNC/ZnO复合材料中,ZnO晶粒尺寸为8.4 nm,高于纯纳米ZnO(6.3 nm),其带隙能(E_g)为3.18 e V; C-CNC/ZnO复合材料中,ZnO晶粒尺寸为7.8 nm,E_g值减小至1.75 e V。吸附-光催化性能测试表明:CNC/ZnO纳米复合材料对MB具有良好的吸附性能,黑暗条件下搅拌60 min,对MB的吸附去除率可达58%,开启光照60 min后,其对MB的吸附-光催化去除率增至88%; C-CNC/ZnO复合材料对MB具有良好的吸附-光催化协同作用,黑暗下吸附60 min,对MB的吸附去除率为49%,光照60 min后,其对MB的吸附-光催化去除率可达99%。
译  名：
Adsorption-photocatalytic properties of cellulose nanocrystal supported ZnO nanocomposites
作  者：
ZHANG Yin;WEI Liuyang;LU Liming;GAN Lu;PAN Mingzhu;College of Materials Science and Engineering,Nanjing Forestry University;Shanghai Formica Decorative Material Co.,Ltd.;
关键词：
ZnO;;cellulose nanocrystal;;biochar;;adsorption;;photocatalysis
摘  要：
Cellulose nanocrystal( CNC) supported nano-ZnO( CNC/ZnO) was prepared using zinc acetate [Zn( CH_3COO)_2·2 H_2O]as raw materials and CNC as a template with a procedure of precipitation method. With the further high temperature treatment at 550 ℃,the carbonized CNC/ZnO nanocomposite( C-CNC/ZnO) was fabricated. The morphology structure, crystal structure, chemical structure and optical property of CNC supported ZnO nanocomposites were characterized by the transmission electron microscope( TEM),X-ray diffraction( XRD),Fourier transform infrared spectrometer( FT-IR),and UV-Vis diffuse reflectance spectroscopy( UV-Vis DRS),respectively.The adsorption-photocatalytic properties of CNC supported ZnO nanocomposites were investigated by removing dye methylene blue( MB). The results showed that CNC of the obtained CNC/ZnO nanocomposite acted as a supporting agent to anchor ZnO by the electrostatic interaction. Nano-ZnOs were arranged in short rod shape,which significantly improved the dispersion. After the high temperature treatment at 550 ℃,nano-ZnO remained the same arrangement and uniformly deposited on the surface of carbonized CNC. The introduction of CNC as the template and the high temperature treatment had an important impact on the crystal structure and optical properties of nano-ZnO.Compared with the crystal size of the pure nano-ZnO( 6.3 nm),the crystal size of ZnO of the CNC/ZnO composites was 8.4 nm,and its band gap energy( Eg) was 3.18 eV. The crystal size of the ZnO of C-CNC/ZnO composites was 7.8 nm,and its Eg value decreased to 1.75 eV. The results of adsorption-photocatalytic properties showed that the obtained CNC/ZnO composite had good adsorption performance with the MB removal rate of 58% under darkness condition for 60 min. Its MB adsorption-photocatalytic removal rate was 88% under the continuous irradiation of light for 60min. The obtained C-CNC/ZnO composite had the optimum removal efficiency to MB,corresponding to 49% MB adsorption removal rate with the darkness condition,and 99% MB adsorption-photocatalytic removal rate after the light irradiation for 60 min at room temperature.

相似文章

导出引用
计量
文章访问数: 46
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46