Modernized H2S-treatment of TiO2 nanoparticles: Improving quantum-dot deposition for enhanced photocatalytic performance
- Authors
- Ali, Ijaz; Muhyuddin, Mohsin; Mullani, Navaj; Kim, Dae Woong; Kim, Dae Hyun; Basit, Muhammad Abdul; Park, Tae Joo
- Issue Date
- Mar-2020
- Publisher
- Elsevier
- Keywords
- TiO2; PbS; CdS; Photocatalysis; H2S-Treatment
- Citation
- Current Applied Physics, v.20, no.3, pp.384 - 390
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- Current Applied Physics
- Volume
- 20
- Number
- 3
- Start Page
- 384
- End Page
- 390
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/1236
- DOI
- 10.1016/j.cap.2019.12.006
- ISSN
- 1567-1739
- Abstract
- One of the efficient strategies to enhance light harvesting capability of metal oxides nanoparticles (NPs) is to deposit low band gap metal sulfides on them via pseudo-successive ionic layer adsorption and reaction (p-SILAR). Resultant oxide-sulfide nanocomposites have a variety of applications, however there is still a need to increase the deposition of metal sulfide in the form of quantum-dots (QDs). In this work, we have successfully enhanced the deposition of QDs on TiO2 NPs using a modernized H2S-treatment strategy. A rotary reactor was employed for H2S-treatment of TiO2 NPs, ensuing higher deposition of PbS (in TiO2-PbS) and CdS (in TiO2-CdS) via p-SILAR. Resultantly, dye degradation of Rhodamine B increased from 63% to 75% and 72%-84%, respectively. X-ray photoelectron spectroscopy revealed the efficacy of modernized H2S-treatment while intensive electrochemical characterization affirmed reduction in charge carrier transfer resistances due to superior deposition of PbS and CdS QDs on TiO2 NPs.
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