Details

Autor(en) / Beteiligte

• Xie, YingMei
• Lv, Lu
• Li, MingHui
• Pan, BingCai
• Chen, Qun
• Zhang, WeiMing
• Zhang, QuanXing

Titel

Development of cation exchanger-based nano-CdS hybrid catalyst for visible-light photodegradation of rhodamine B from water

Ist Teil von

• Science China. Chemistry, 2012-03, Vol.55 (3), p.409-415

Ort / Verlag

Heidelberg: SP Science China Press

Erscheinungsjahr

2012

Quelle

SpringerLink

Beschreibungen/Notizen

• A new polymeric nanocomposite photocatalyst A15-CdS with large spherical beads （0.70-0.80 mm in diameter） was fabricat- ed for efficient Rhodamine B （RhB） photodegradation with facile separation during cyclic runs, and photocorrosion, a congen- ital drawback of CdS, was successfully inhibited for A15-CdS. The nanocomposite catalyst was obtained by impregnating CdS nanoparticles within porous polymeric cation exchanger A15 through a facile inner-surface deposition. CdS nanoparticles （〈20 nm） immobilized in A15 were deliberately distributed within an outside ring-like region of 40-50 ~m in depth, which is dom- inant for photoreaction because visible light is not expected to permeate through the inner region of nontransparent A15. As expected, efficient RhB photodegradation by A15-CdS was achieved under visible light irradiation, and large-size A15-CdS beads are expected to result in their facile separation from solution for repeated use. More significantly, negligible photocorro- sion for the hybrid catalyst A15-CdS was demonstrated by the constant photodegradation efficiency and negligible CdS loss during five-cycle runs. The results indicated that nano-CdS immobilization within A15 would greatly improve the applicability of CdS nanoparticles in practical environmental remediation.