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- Title
Accelerated sunlight photocatalysis through improved electron mobility between g-C<sub>3</sub>N<sub>4</sub> and BiPO<sub>4</sub> nanomaterial.
- Authors
Ng, Jit Jang; Sim, Lan Ching; Oh, Wen-Da; Saravanan, Pichiah; Tan, Bo; Leong, Kah Hon
- Abstract
Herein, we report a detailed study on creating heterojunction between graphitic carbon nitride (g-C3N4) and bismuth phosphate (BiPO4), enhancing the unpaired free electron mobility. This leads to an accelerated photocatalysis of 2,4-dichlorophenols (2,4-DCPs) under sunlight irradiation. The heterojunction formation was efficaciously conducted via a modest thermal deposition technique. The function of g-C3N4 plays a significant role in generating free electrons under sunlight irradiation. Together, the generated electrons at the g-C3N4 conduction band (CB) are transferred and trapped by the BiPO4 to form active superoxide anion radicals (•O2−). These active radicals will be accountable for the photodegradation of 2,4-DCPs. The synthesized composite characteristics were methodically examined through several chemical and physical studies. Due to the inimitable features of both g-C3N4 and BiPO4, its heterojunction formation, 2.5wt% BiPO4/g-C3N4 achieved complete 2,4-DCP removal (100%) in 90 min under sunlight irradiation. This is due to the presence of g-C3N4 that enhanced electron mobility through the formation of heterojunctions that lengthens the electron-hole pairs' lifetime and maximizes the entire solar spectrum absorption to generate active electrons at the g-C3N4 conduction band. Thus, this formation significantly draws the attention for future environmental remediation, especially in enhancing the entire solar spectrum's harvesting.
- Subjects
ELECTRON mobility; CONDUCTION bands; ABSORPTION spectra; NANOSTRUCTURED materials; PHOTOCATALYSIS; SOLAR spectra
- Publication
Environmental Science & Pollution Research, 2022, Vol 29, Issue 57, p86068
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-021-16449-y