Nanostructured CdS sensitized CdWO4nanorods for hydrogen generation from hydrogen sulfide and dye degradation under sunlight.
In this report, CdS nanoparticles have been grown on the surface of CdWO4nanorods via an in-situ approach and their high photocatalytic ability toward dye degradation and H2evolution from H2S splitting under visible light has been demonstrated. The structural and optical properties as well as morphologies with varying amount of CdS to form CdS@CdWO4have been investigated. Elemental mapping and high resolution transmission electron microscopy (HRTEM) analysis proved the sensitization of CdWO4nanorods by CdS nanoparticles. A decrease in the PL emission of CdWO4was observed with increasing amount of CdS nanoparticles loading possibly due to the formation of trap states. Considering the band gap in visible region, the photocatalytic study has been performed for H2production from H2S and dye degradation under natural sunlight. The steady evolution of H2was observed from an aqueous H2S solution even without noble metal. Moreover, the rate of photocatalytic H2evolution over CdS modified CdWO4is ca. 5.6 times higher than that of sole CdWO4under visible light. CdS modified CdWO4showed a good ability toward the photo-degradation of methylene Blue. The rate of dye degradation over CdS modified CdWO4is ca. 7.4 times higher than that of pristine CdWO4under natural sunlight. With increase in amount of CdS nanoparticle loading on CdWO4nanorods the hydrogen generation was observed to be decreased where as dye degradation rate is increased. Such nano-heterostructures may have potential in other photocatalytic reactions.
Centre for Materials for Electronics Technology (C-MET), Department of Electronics and Information and Technology (DeitY), Government of India, Panchawati off Pashan Road, Pune 411008, India.
Yogesh A
YA
Sethi
Centre for Materials for Electronics Technology (C-MET), Department of Electronics and Information and Technology (DeitY), Government of India, Panchawati off Pashan Road, Pune 411008, India.
Rajendra P
RP
Panmand
Centre for Materials for Electronics Technology (C-MET), Department of Electronics and Information and Technology (DeitY), Government of India, Panchawati off Pashan Road, Pune 411008, India.
Sunil R
SR
Kadam
Centre for Materials for Electronics Technology (C-MET), Department of Electronics and Information and Technology (DeitY), Government of India, Panchawati off Pashan Road, Pune 411008, India.
Aniruddha K
AK
Kulkarni
Centre for Materials for Electronics Technology (C-MET), Department of Electronics and Information and Technology (DeitY), Government of India, Panchawati off Pashan Road, Pune 411008, India.
Sanjay K
SK
Apte
Centre for Materials for Electronics Technology (C-MET), Department of Electronics and Information and Technology (DeitY), Government of India, Panchawati off Pashan Road, Pune 411008, India.
Sonali D
SD
Naik
Centre for Materials for Electronics Technology (C-MET), Department of Electronics and Information and Technology (DeitY), Government of India, Panchawati off Pashan Road, Pune 411008, India.
N
N
Munirathnam
Centre for Materials for Electronics Technology (C-MET), Department of Electronics and Information and Technology (DeitY), Government of India, Panchawati off Pashan Road, Pune 411008, India. Electronic address: milind@cmet.gov.in.
Milind V
MV
Kulkarni
Centre for Materials for Electronics Technology (C-MET), Department of Electronics and Information and Technology (DeitY), Government of India, Panchawati off Pashan Road, Pune 411008, India. Electronic address: bbkale@cmet.gov.in.
Bharat B
BB
Kale
CdWO(4); Dye degradation; Hydrogen generation; Photocatalysis