| 引用本文: | 黎成,葛玮,杨清文,张新霓,陈友强.沸石固定Pt QDs修饰TiO2的环境友好型光催化剂[J].材料科学与工艺,2024,32(6):50-58.DOI:10.11951/j.issn.1005-0299.20230177. |
| LI Cheng,GE Wei,YANG Qingwen,ZHANG Xinni,CHEN Youqiang.An environmentally friendly Pt QDs-modified TiO2 photocatalyst by zeolite fixation[J].Materials Science and Technology,2024,32(6):50-58.DOI:10.11951/j.issn.1005-0299.20230177. |
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| 摘要: |
| 半导体纳米材料光催化技术在应对有机物水环境污染问题上展现出巨大潜力,但其实际应用仍存在极大的挑战。本文采用铂量子点(Pt QDs)修饰法,将P25二氧化钛纳米颗粒固定在Beta沸石晶体内部制备了一种高效选择性环境友好型TiO2基光催化剂(Pt-modified P25@Beta zeolite)。研究结果表明,在可见光照射360 min后,Pt-modified P25@Beta zeolite 几乎完全降解了水溶液中的苯胺,光降解率达到了90.8%,而Pt-modified P25@Beta zeolite在相同条件下对叶绿素(CP)的光降解率仅有8.6%。所制备的光催化剂优异的选择性光催化性能归因于其独特的纳米结构,其中Beta沸石晶体鞘具有均匀的微孔,可以使苯胺污染物通过并在水中被完全光催化降解,但同时却阻碍了叶绿素接触到催化剂表面。 |
| 关键词: TiO2 Pt量子点 沸石 形状选择性 光催化 |
| DOI：10.11951/j.issn.1005-0299.20230177 |
| 分类号:TQ174 |
| 文献标识码:A |
| 基金项目:国家自然科学基金资助项目(51772161). |
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| An environmentally friendly Pt QDs-modified TiO2 photocatalyst by zeolite fixation |
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LI Cheng, GE Wei, YANG Qingwen, ZHANG Xinni, CHEN Youqiang
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(College of Physics Science, Qingdao University, Qingdao 266071, China)
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| Abstract: |
| Semiconductor nanomaterials photocatalysis technology has shown great potential in dealing with organic water pollution issues, but it still remains a great challenge in practical applications. In this work, a highly efficient eco-friendly TiO2-based photocatalyst (Pt-modified P25@Beta zeolite) was prepared by decorating the P25 nanoparticles with Pt quantum dots (QDs) followed by the Beta-type zeolite crystal fixation. Results showed Pt-modified P25@Beta zeolite nearly gave complete removal of the aniline pollutant with the photodegradation rate at about 90.8% in the aqueous solution under visible light irradiation for 360 min, while the photodegradation rate of chlorophyll (CP) was very low at only 8.6% under the same condition. The outstanding efficient and selective photocatalytic properties of the as-prepared catalyst are attributed to its unique nanostructure with a zeolite crystal sheath with uniform micropores that only enable the aniline pollutant in smaller molecular size to pass through and be fully photodegraded in water while impede the access of the bucky chlorophyll to the surface of the catalyst. |
| Key words: TiO2 Pt quantum dots zeolite shape-selective photocatalyst |
