|
![本文二维码信息](/download_upload_file.aspx?file_name=/uploadfile/two_dimensional_code_img/zgzzen/2021/3/202103002.png) 二维码(扫一下试试看!) |
Preparation of Lignocellulose Based Carbon Quantum Dots/Mesoporous TiO2 Composite and Its Photocatalytic Performance |
Received:October 03, 2020 |
DOI:10.11980/j.issn.0254-508X.2021.03.002 |
Key Words:mesoporous TiO2 carbon quantum dots corncob residues lignin photocatalysis |
Fund Project:中国博士后基金面上项目(2019M651050);天津市制浆造纸重点实验室项目(201802);天津市大学生创新创业项目(201910057042,202010057006)。 |
|
Hits: 3477 |
Download times: 2348 |
Abstract:In this study, a composite photocatalyst system (mesoporous TiO2/E-N-CQDs) was constructed by using nitrogen-doped CQDs (E-N-CQDs) from enzymatically hydrolyzed corncob residues and mesoporous TiO2. The resultant mesoporous TiO2/E-N-CQDs was characterized and explored to use for the photocatalytic degradation of methylene blue (MB) solution. The results showed that E-N-CQDs exhibited good fluorescence properties, and the chromophoric and auxochromic groups such as carboxyl groups and amino groups on the surface of E-N-CQDs enhanced its fluorescence. The prepared mesoporous TiO2 had a large specific surface area with a pore size distribution in the range of 8~32 nm. The photocatalytic degradation ratio of MB solution using mesoporous TiO2/E-N-CQDs achieved 89% when irradiation time was 300 mins, increased by 59% compared with using mesoporous TiO2, suggesting that the addition of E-N-CQDs significantly enhanced the photocatalytic ability of mesoporous TiO2, improved the utilization efficiency of the visible light. |
View Full Text HTML View/Add Comment Download reader |