Enhanced photocatalytic performance in preyssler-type P5W30CdS nanohybrids synthesized by l-cystine-mediated hydrothermal assembly. (21st May 2019)

• Record Type: Journal Article
• Authors: Chen, Hong; Cao, Ying; Wang, Ran; Li, Yunhe; Liu, Meiying; Zhang, Lancui; You, Wansheng
• Is Part Of: International journal of hydrogen energy. Volume 44:Number 26(2019)
• Page Start: 13052
• Page End: 13060
• Publication Date: 2019-05-21
• Subjects: P5W30CdS -- l-cystine-assisted -- H2 production -- Visible light; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.03.214
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Nanohybrids of P5 W30 CdS with intimate contact have been synthesized via a facile hydrothermal strategy in presence ofl -cystine as sulfur precursor, chelating and anchoring linker molecule. In this process, nanosized CdS can be positively-charged by anchoring NH2 groups inl -cystine structure. Through the electrostatic interaction between the positively-charged amine-functionalized CdS and the negatively-charged Preyssler-type [NaP5 W30 O110 ] 14− (denoted as P5 W30 ), P5 W30 CdS nanohybrids with intimate contact are achieved, which is verified with XRD, IR, TEM, HRTEM, EDS, XPS and UV–Vis spectra. Of particular importance is that P5 W30 CdS nanohybrids demonstrate better photocatalytic performance for H2 production and RhB degradation than unhybridized CdS and P5 W30 under visible light irradiation. The H2 -production activity of CdS is further increased up to 59 times with 8 wt% P5 W30 and 0.75 wt% NiS co-loaded, which is attributed to the facilitated charge-transfer between CdS, P5 W30 and NiS. The mild, efficient and eco-friendly self-assembly method is versatile and promising for developing photocatalytic hybrid materials. Highlights: P5 W30 CdS with good contact is prepared byl -cystine-assisted hydrothermal method. Herel -cystine works as sulfur source, chelating and anchoring linker. P5 W30 CdS shows enhanced photocatalytic activity for H2 evolution and RhB degradation. The H2 -evolution rate of NiS/P5 W30 CdS is increased to 59 times that of naked CdS. The high activity arises from the facile charge-transfer between CdS, P5 W30 and NiS.