Preparation and characterization of nitrogen and silver co-doped TiO<sub>2</sub> nanocatalyst for visible light photocatalysis
Nitrogen and silver co-doped TiO<sub>2</sub> photocatalytic material was prepared by improved sol-gel method. Physiochemical properties were characterized by means of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and ultravio...
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| Format: | Article |
| Language: | zho |
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Journal of Materials Engineering
2020-11-01
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| Series: | Cailiao gongcheng |
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| Online Access: | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2019.000151 |
| _version_ | 1797972457254027264 |
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| author | BAI Yuan ZHANG Chao-zhi SUN Hong-qi CHEN Bin |
| author_facet | BAI Yuan ZHANG Chao-zhi SUN Hong-qi CHEN Bin |
| author_sort | BAI Yuan |
| collection | DOAJ |
| description | Nitrogen and silver co-doped TiO<sub>2</sub> photocatalytic material was prepared by improved sol-gel method. Physiochemical properties were characterized by means of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and ultraviolet-visible diffuse spectroscopy (UV-Vis). The results show that nitrogen doping is substituted into TiO<sub>2</sub> lattice, but catalyst grain growth cannot be inhibited. Due to the addition of Ag element, catalyst grain growth is inhibited. Greatest band-gap narrowing occurs due to nitrogen and silver co-doping. The experiments of photogradation of phenol show that photocatalytic efficiency of catalysts prepared by the improved sol-gel method is significantly higher than that of catalysts prepared by the impregnation method. Under UV-visible irradiation for 120 min, the efficiency of nitrogen and silver co-doped TiO<sub>2</sub> is 51.3%, and the efficiency is 51.7% under visible light irradiation for 360 min. Fortunately, visible photocatalytic activity is not realised at the cost of UV activity. Nitrogen and silver co-doping not only reduces band gap of TiO<sub>2</sub>, but also adjusts its absorption threshold to visible region. Simultaneously, oxygen vacancy concentration of catalysts increases and the response of catalysts to visible light significantly enhances, hence photocatalytic activity of nitrogen and silver co-doped TiO<sub>2</sub> enhances. |
| first_indexed | 2024-04-11T03:48:43Z |
| format | Article |
| id | doaj.art-83e4ffe0377a40d18568813cecdb7271 |
| institution | Directory Open Access Journal |
| issn | 1001-4381 1001-4381 |
| language | zho |
| last_indexed | 2024-04-11T03:48:43Z |
| publishDate | 2020-11-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-83e4ffe0377a40d18568813cecdb72712023-01-02T02:21:52ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43811001-43812020-11-014811323810.11868/j.issn.1001-4381.2019.00015120201104Preparation and characterization of nitrogen and silver co-doped TiO<sub>2</sub> nanocatalyst for visible light photocatalysisBAI Yuan0ZHANG Chao-zhi1SUN Hong-qi2CHEN Bin3GuoDian Science and Technology Research Institute, Nanjing 210023, ChinaSchool of Marine Sciences, Nanjing University of Information Science&Technology, Nanjing 210044, ChinaSchool of Engineering, Edith Cowan University, Perth WA6027, AustraliaJiangyin Lichuang Graphene Photocatalytic Technology Co., Ltd., Jiangyin 214443, Jiangsu, ChinaNitrogen and silver co-doped TiO<sub>2</sub> photocatalytic material was prepared by improved sol-gel method. Physiochemical properties were characterized by means of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and ultraviolet-visible diffuse spectroscopy (UV-Vis). The results show that nitrogen doping is substituted into TiO<sub>2</sub> lattice, but catalyst grain growth cannot be inhibited. Due to the addition of Ag element, catalyst grain growth is inhibited. Greatest band-gap narrowing occurs due to nitrogen and silver co-doping. The experiments of photogradation of phenol show that photocatalytic efficiency of catalysts prepared by the improved sol-gel method is significantly higher than that of catalysts prepared by the impregnation method. Under UV-visible irradiation for 120 min, the efficiency of nitrogen and silver co-doped TiO<sub>2</sub> is 51.3%, and the efficiency is 51.7% under visible light irradiation for 360 min. Fortunately, visible photocatalytic activity is not realised at the cost of UV activity. Nitrogen and silver co-doping not only reduces band gap of TiO<sub>2</sub>, but also adjusts its absorption threshold to visible region. Simultaneously, oxygen vacancy concentration of catalysts increases and the response of catalysts to visible light significantly enhances, hence photocatalytic activity of nitrogen and silver co-doped TiO<sub>2</sub> enhances.http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2019.000151tio<sub>2</sub>photocatalysisnitrogen and silver co-dopingvisible light responsepreparation |
| spellingShingle | BAI Yuan ZHANG Chao-zhi SUN Hong-qi CHEN Bin Preparation and characterization of nitrogen and silver co-doped TiO<sub>2</sub> nanocatalyst for visible light photocatalysis Cailiao gongcheng tio<sub>2</sub> photocatalysis nitrogen and silver co-doping visible light response preparation |
| title | Preparation and characterization of nitrogen and silver co-doped TiO<sub>2</sub> nanocatalyst for visible light photocatalysis |
| title_full | Preparation and characterization of nitrogen and silver co-doped TiO<sub>2</sub> nanocatalyst for visible light photocatalysis |
| title_fullStr | Preparation and characterization of nitrogen and silver co-doped TiO<sub>2</sub> nanocatalyst for visible light photocatalysis |
| title_full_unstemmed | Preparation and characterization of nitrogen and silver co-doped TiO<sub>2</sub> nanocatalyst for visible light photocatalysis |
| title_short | Preparation and characterization of nitrogen and silver co-doped TiO<sub>2</sub> nanocatalyst for visible light photocatalysis |
| title_sort | preparation and characterization of nitrogen and silver co doped tio sub 2 sub nanocatalyst for visible light photocatalysis |
| topic | tio<sub>2</sub> photocatalysis nitrogen and silver co-doping visible light response preparation |
| url | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2019.000151 |
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