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|
| Type |
Poster Presentation |
| Area |
Physical Chemistry |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
PHYS.P-113 |
| Subject |
Facile Sonochemical Synthesis of Bulk Black Phosphorus from red phosphorus and its Co-catalyst Activity on CdS nanorods for Highly Efficient Photocatalytic Hydrogen Production |
| Authors |
MADHUSUDANA GOPANNAGARI, PRAVEEN KUMAR DHARANI, Bhavani Palagiri, EunHwa Kim, Amaranatha reddy, TaeKyu Kim*
Department of Chemistry, Pusan National University, Korea
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| Abstract |
Metal-free elemental photocatalysts for H2 evolution are more advantageous than the traditional metal-based inorganic photocatalysts since the nonmetal elements are generally cheaper, more earth-abundant, and environmentally friendly. Black phosphorus (BP) has been attracting increasing attention in recent years based on its anisotropic 2D layered structure with tunable bandgap; however, the application of BP for photocatalytic H2 evolution has been scarcely reported experimentally although being theoretically predicted. Here we synthesized black phosphorus from red phosphorus, which is a safer solid precursor, using sonochemistry, and water is the main solvent used in our process. Thus, this method is a low-cost, simple and non-toxic route for large-scale solution-based BP. This bulk BP further studied as a high-efficiency metal free cocatalyst for CdS nanorods. The optimal BP-CdS photocatalyst exhibits a great H2 production of ~8250 µmol h-1. g-1 using simulated solar light irradiation. The performance of this photocatalyst is four times greater than pristine CdS nanorods; moreover, this bulk BP-CdS nanorods composite reveal the obvious predominance, such as enhanced photoactivity and photostability of CdS for H2 production. This outstanding activity arises from the strong electronic coupling between BP and CdS, as well as the favorable band structure, high charge mobility and massive active sites of black phosphorus, supported by TEM, X-ray photoelectron spectroscopy, DRS UV-Vis, photoluminescence. The mechanism has been investigated by photoelectrochemical and Mott-Schottky measurements. |
| E-mail |
mr.madhu20@gmail.com |
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121st General Meeting of the KCS