| 학회 |
한국재료학회 |
| 학술대회 |
2021년 가을 (11/24 ~ 11/26, 경주 라한호텔) |
| 권호 |
27권 2호 |
| 발표분야 |
C. 에너지 재료 분과 |
| 제목 |
Effect of shell materials on the CdS surface for augmented photocatalytic H2 efficiency under visible light irradiation |
| 초록 |
Growth of hierarchal nano- structured photocatalyst with ultra-thin shell materials TiO 2 @NiO@ZnS is of great importance towards the stable and continuous hydrogen (H 2 ) production [1] , where the shell materials avoid the photo-corrosion of the core for longer stability with continuous H 2 generation. According to, herein, we report a comparative study on the CdS core coated with three various shell materials (TiO 2 @NiO@ZnS) for enhanced H 2production under visible light irradiation. The structural and morphological characterizations using XRD and TEM techniques revealed the formation of phase pure CdS@TiO 2@NiO@ZnS nanocomposites, with sphere-type structures having core diameter and shell thickness of 395 and 15 nm and rod-like structure with diameter 82.4 and shell thickness 6.3 nm respectively. XPS studies revealed that the constituted elements in the nanocomposite exist in their valence states of the nanocomposites, which indicated the stable structural integrity of the individual phase in the core@shell structure. The synergistic optical properties of hierarchal nanostructure showed the absorption edge around 500 nm and the decreased PL intensity indicated the improved charge recombination resistance in the core@shell nanocomposite. The photocatalytic activity comparison between these three different materials reveals in the order of TiO 2 ＞ NiO ＞ ZnS under visible light irradiation [2,3]. Based on the obtained results, were observed among these materials the CdS@TiO 2 core@shell photocatalyst showed higher efficiency due to the increased charge separation, spatial distributions of the carriers, and effect of the structural properties. |
| 저자 |
VEMPULURU NAVAKOTESWARA RAO1, Karthik Kannan2, Jun-Mo Yang3, Bee Lyong Yang4
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| 소속 |
1Nano-convergence Technology Division, 2National Nanofab Center, 3291 Daehak-ro, 4Yuseong-gu |
| 키워드 |
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| E-Mail |
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