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Ni2+-doped ZnxCd1−xS photocatalysts from single-source precursors for efficient solar hydrogen production under visible light irradiation

หน่วยงาน Nanyang Technological University, Singapore

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ชื่อเรื่อง : Ni2+-doped ZnxCd1−xS photocatalysts from single-source precursors for efficient solar hydrogen production under visible light irradiation
นักวิจัย : Wang, Yabo , Wu, Jianchun , Zheng, Jianwei , Jiang, Rongrong , Xu, Rong
คำค้น : -
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2555
อ้างอิง : Wang, Y., Wu, J., Zheng, J., Jiang, R.,& Xu, R. (2012). Ni2+-doped ZnxCd1−xS photocatalysts from single-source precursors for efficient solar hydrogen production under visible light irradiation. Catalysis Science & Technology, 2(3), 581-. , http://hdl.handle.net/10220/12765 , http://dx.doi.org/10.1039/c2cy00310d
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Catalysis science & technology
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Ni2+-doped photocatalysts Ni(y)-ZnxCd1−xS (where 0 ≤ x ≤ 0.80, 0% ≤ y ≤ 8%) were prepared by a two-step route, which consisted of a first precipitation of single-source precursors and a subsequent solvothermal treatment of the precursors in ethylenediamine. Structural, morphological and optical properties of the as-prepared samples were characterized by XRD, UV-vis DRS, FESEM, TEM, N2 physisorption, ICP-AES and XPS techniques. The photocatalytic activity was evaluated for hydrogen evolution from the aqueous solution containing sodium sulfide and sodium sulfite under visible light irradiation. All Ni2+-doped samples exhibit enhanced photocatalytic activity compared with the non-doped sample. Sample Ni(4%)-Zn0.4Cd0.6S gives the highest hydrogen evolution rate of 941 μmol h−1 under the optimized reaction conditions without any co-catalysts, with a corresponding quantum efficiency of 22.8% at 420 nm which is much higher compared to those of previously reported Ni2+-doped metal sulfide photocatalysts. It is suggested that good crystallinity, suitable band structure and the accommodation sites introduced by Ni2+ doping for charge carrier separation together contribute to the high activity of such photocatalysts for hydrogen evolution.

บรรณานุกรม :
Wang, Yabo , Wu, Jianchun , Zheng, Jianwei , Jiang, Rongrong , Xu, Rong . (2555). Ni2+-doped ZnxCd1−xS photocatalysts from single-source precursors for efficient solar hydrogen production under visible light irradiation.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Wang, Yabo , Wu, Jianchun , Zheng, Jianwei , Jiang, Rongrong , Xu, Rong . 2555. "Ni2+-doped ZnxCd1−xS photocatalysts from single-source precursors for efficient solar hydrogen production under visible light irradiation".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Wang, Yabo , Wu, Jianchun , Zheng, Jianwei , Jiang, Rongrong , Xu, Rong . "Ni2+-doped ZnxCd1−xS photocatalysts from single-source precursors for efficient solar hydrogen production under visible light irradiation."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2555. Print.
Wang, Yabo , Wu, Jianchun , Zheng, Jianwei , Jiang, Rongrong , Xu, Rong . Ni2+-doped ZnxCd1−xS photocatalysts from single-source precursors for efficient solar hydrogen production under visible light irradiation. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2555.