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Enhanced visible-light photoelectrochemical behaviour of heterojunction composite with Cu2O nanoparticles-decorated TiO2 nanotube arrays

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Enhanced visible-light photoelectrochemical behaviour of heterojunction composite with Cu2O nanoparticles-decorated TiO2 nanotube arrays
นักวิจัย : Zhang, Jianfang , Wang, Yan , Yu, Cuiping , Shu, Xia , Jiang, Lai , Cui, Jiewu , Chen, Zhong , Xie, Ting , Wu, Yucheng
คำค้น : DRNTU::Engineering::Materials::Nanostructured materials
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2557
อ้างอิง : Zhang, J., Wang, Y., Yu, C., Shu, X., Jiang, L., Cui, J., et al. (2014). Enhanced visible-light photoelectrochemical behaviour of heterojunction composite with Cu2O nanoparticles-decorated TiO2 nanotube arrays. New journal of chemistry, 38(10), 4975-4984. , http://hdl.handle.net/10220/24295 , http://dx.doi.org/10.1039/C4NJ00787E
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : New journal of chemistry
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Heterojunction composites based on n-type TiO2 nanotubes arrays (TNAs) coupled with p-type Cu2O nanoparticles were synthesized using a square wave voltammetry deposition method for in situ deposition of Cu2O nanoparticles onto the inner surfaces and interfaces of TNAs. The prepared samples were characterized by field-emission scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, and UV-vis spectroscopy. When compared with pure TNAs, the Cu2O–TNAs heterojunction composites exhibit considerably higher photocurrent density under visible-light irradiation and enhanced photocatalytic activity for the visible-light-driven photodegradation of methyl orange. Moreover, the photocurrent densities and photocatalytic activity of the Cu2O–TNAs heterostructures largely depend on the deposition potential which determines the content of the Cu2O nanoparticles. The Cu2O–TNAs prepared by the deposition potential of −1.0 V showed the highest photocurrent density (0.91 mA cm−2) and the largest photodegradation rate of methyl orange (88.8%) at the applied potential of 0.5 V under visible light irradiation. The enhanced photoelectrocatalytic activity can be attributed to reducing the recombination rate of the photoexcited electron–hole pairs in TNAs when coupled with Cu2O nanoparticles.

บรรณานุกรม :
Zhang, Jianfang , Wang, Yan , Yu, Cuiping , Shu, Xia , Jiang, Lai , Cui, Jiewu , Chen, Zhong , Xie, Ting , Wu, Yucheng . (2557). Enhanced visible-light photoelectrochemical behaviour of heterojunction composite with Cu2O nanoparticles-decorated TiO2 nanotube arrays.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Zhang, Jianfang , Wang, Yan , Yu, Cuiping , Shu, Xia , Jiang, Lai , Cui, Jiewu , Chen, Zhong , Xie, Ting , Wu, Yucheng . 2557. "Enhanced visible-light photoelectrochemical behaviour of heterojunction composite with Cu2O nanoparticles-decorated TiO2 nanotube arrays".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Zhang, Jianfang , Wang, Yan , Yu, Cuiping , Shu, Xia , Jiang, Lai , Cui, Jiewu , Chen, Zhong , Xie, Ting , Wu, Yucheng . "Enhanced visible-light photoelectrochemical behaviour of heterojunction composite with Cu2O nanoparticles-decorated TiO2 nanotube arrays."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2557. Print.
Zhang, Jianfang , Wang, Yan , Yu, Cuiping , Shu, Xia , Jiang, Lai , Cui, Jiewu , Chen, Zhong , Xie, Ting , Wu, Yucheng . Enhanced visible-light photoelectrochemical behaviour of heterojunction composite with Cu2O nanoparticles-decorated TiO2 nanotube arrays. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2557.