| Related citation: | Hanliang Li,Shiyu Miao,Lu Qiu,Bandna Bharti,Feng Ouyang.Simulated Sunlight Irradiation Based Photocatalytic Degradation of Acrylonitrile by Sn-F Co-doped TiO2/SiO2 Nano Powder Catalyst[J].Journal of Harbin Institute Of Technology(New Series),2021,28(1):12-19.DOI:10.11916/j.issn.1005-9113.19037. |
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| Author Name | Affiliation | | Hanliang Li | School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, Guangdong, China | | Shiyu Miao | School of Life Science and Medicine, Dalian University of Technology, Panjin 124000, Liaoning,China | | Lu Qiu | School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, Guangdong, China | | Bandna Bharti | School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, Guangdong, China | | Feng Ouyang | School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, Guangdong, China |
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| Abstract: |
| This study proved the significance of simulated sunlight irradiation response capability of Sn-F co-doped TiO2/SiO2 (Sn-F-TiO2/SiO2) photocatalysts, which were prepared by a simple sol-gel method and were evaluated by acrylonitrile degradation for photocatalytic activity. The synthesized catalysts were characterized by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive Spectrometer (EDS), X-ray Photoelectron Spectroscopy (XPS), Brunauer-Emmett-Teller (BET), Ultraviolet-Visible Absorption spectroscopy (UV-Vis), and Photoluminescence Spectroscopy (PL). UV-Visible spectroscopy demonstrated that Sn doping caused remarkable red shift in TiO2, which significantly increased the absorption efficiency of the catalysts. The XPS results showed that Sn was successfully doped into the TiO2 lattice. The photocatalytic degradation of acrylonitrile indicated that the Sn-F-TiO2/SiO2 photocatalysts exhibited excellent photocatalytic activity when being annealed at 550 ℃ for 2 h. The degradation rate of acrylonitrile reached 67.7% after irradiation under simulated sunlight for 6 min, and the hole was the most important active species. |
| Key words: photocatalysis acrylonitrile degradation Sn doping F-TiO2/SiO2 |
| DOI：10.11916/j.issn.1005-9113.19037 |
| Clc Number:X506 |
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| Descriptions in Chinese: |
| 模拟阳光照射下Sn-F共掺杂TiO2/SiO2纳米粉体催化剂对丙烯腈的光催化降解 李翰良1，苗诗雨2，邱露1，Bandna Bharti1，欧阳峰1 （1．哈尔滨工业大学（深圳） 土木与环境工程学院， 深圳 518055； 2． 大连理工大学（盘锦） 生命科学与医学学院，辽宁 盘锦 124000） 创新点说明：光催化降解污染物是一种绿色环保技术，其中F-TiO2/SiO2是本课题组研究比较成熟的技术，现通过进一步Sn-F共掺杂方式使得催化剂活性进一步提升，对光的吸收能力更强。 研究目的： 本研究致力于解决丙烯腈生产废水的光催化降解问题，由于丙烯腈存在碳氮三键，很难被生物降解，且丙烯腈生物毒性很强，常规方法很难达到彻底降解的目的。故本研究通过光催化技术产生强氧化能力的空穴将其氧化。 研究方法： 通过Sn-F共掺杂方式改性F-TiO2/SiO2催化剂，研究不同煅烧温度对其表面特性的影响，并进行XRD，SEM，EDS，XPS，BET，UV-Vis，PL等表征手段研究。 研究结果： 实验结果表明：通过Sn-F共掺杂，提升了光的吸收能力，增大了催化剂的比表面积，不同温度下煅烧均为锐钛矿相，且催化剂的分散性良好，电子-空穴对的分离得到改善，降解丙烯腈的能力比未掺杂前有很大的提高。 结论： 采用溶胶-凝胶法制备了Sn-F-TiO2/SiO2催化剂。在模拟光照条件下降解丙烯腈，评价其光催化活性。系统研究了Sn-F-TiO2/SiO2催化剂对丙烯腈降解的催化活性。Sn-F-TiO2 /SiO2催化剂对丙烯腈的降解率为67.7%。表征结果表明，Sn-F-TiO2/SiO2催化剂晶体尺寸小，颗粒表面小，颗粒疏松，有利于催化剂粉末在反应体系中均匀分散。PL也略有减弱，这意味着光生电子和空穴的复合受到抑制。吸收边发生红移，提高了光的利用率，并提高了光催化活性。XPS结果表明，催化剂晶格中成功掺杂了锡。在反应体系中加入牺牲剂表明，空穴是光催化活性中最重要的活性组分。 关键词：光催化，丙烯腈降解，Sn掺杂，F-TiO2/SiO2 |
