Tuning the Surface Structure of Nitrogen-Doped TiO2 Nanofibres-An Effective Method to Enhance Photocatalytic Activities of Visible-Light-Driven Green Synthesis and Degradation

	Tuning the Surface Structure of Nitrogen-Doped TiO2 Nanofibres-An Effective Method to Enhance Photocatalytic Activities of Visible-Light-Driven Green Synthesis and Degradation
	Zheng ZF ; Zhao J ; Yuan Y ; Liu HW ; Yang DJ ; Sarina S ; Zhang HJ ; Waclawika ER ; Zhu HY
刊名	chemistry-a european journal
	2013
卷号	19 期号:18 页码:5731-5741
关键词	TITANIUM-DIOXIDE TITANATE NANOFIBERS METAL NANOPARTICLES GOLD NANOPARTICLES AEROBIC OXIDATION RUTILE TIO2 BAND-GAP ANATASE WATER NANOCRYSTALS
ISSN号	0947-6539
通讯作者	zhu hy
中文摘要	nitrogen-doped tio2 nanofibres of anatase and tio2(b) phases were synthesised by a reaction between titanate nanofibres of a layered structure and gaseous nh3 at 400700 degrees c, following a different mechanism than that for the direct nitrogen doping from tio2. the surface of the n-doped tio2 nanofibres can be tuned by facial calcination in air to remove the surface-bonded n species, whereas the core remains n doped. n-doped tio2 nanofibres, only after calcination in air, became effective photocatalysts for the decomposition of sulforhodamineb under visible-light irradiation. the surface-oxidised surface layer was proven to be very effective for organic molecule adsorption, and the activation of oxygen molecules, whereas the remaining n-doped interior of the fibres strongly absorbed visible light, resulting in the generation of electrons and holes. the n-doped nanofibres were also used as supports of gold nanoparticle (au np) photocatalysts for visible-light-driven hydroamination of phenylacetylene with aniline. phenylacetylene was activated on the n-doped surface of the nanofibres and aniline on the au nps. the au nps adsorbed on n-doped tio2(b) nanofibres exhibited much better conversion (80% of phenylacetylene) than when adsorbed on undoped fibres (46%) at 40 degrees c and 95% of the product is the desired imine. the surface n species can prevent the adsorption of o2 that is unfavourable for the hydroamination reaction, and thus, improve the photocatalytic activity. removal of the surface n species resulted in a sharp decrease of the photocatalytic activity. these photocatalysts are feasible for practical applications, because they can be easily dispersed into solution and separated from a liquid by filtration, sedimentation or centrifugation due to their fibril morphology.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000318282200030
公开日期	2014-04-16
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/49931]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Zheng ZF,Zhao J,Yuan Y,et al. Tuning the Surface Structure of Nitrogen-Doped TiO2 Nanofibres-An Effective Method to Enhance Photocatalytic Activities of Visible-Light-Driven Green Synthesis and Degradation[J]. chemistry-a european journal,2013,19(18):5731-5741.
APA	Zheng ZF.,Zhao J.,Yuan Y.,Liu HW.,Yang DJ.,...&Zhu HY.(2013).Tuning the Surface Structure of Nitrogen-Doped TiO2 Nanofibres-An Effective Method to Enhance Photocatalytic Activities of Visible-Light-Driven Green Synthesis and Degradation.chemistry-a european journal,19(18),5731-5741.
MLA	Zheng ZF,et al."Tuning the Surface Structure of Nitrogen-Doped TiO2 Nanofibres-An Effective Method to Enhance Photocatalytic Activities of Visible-Light-Driven Green Synthesis and Degradation".chemistry-a european journal 19.18(2013):5731-5741.