| 학회 |
한국재료학회 |
| 학술대회 |
2015년 가을 (11/25 ~ 11/27, 부산 해운대그랜드호텔) |
| 권호 |
21권 2호 |
| 발표분야 |
G. 나노/박막 재료 |
| 제목 |
Enhanced photocatalytic activity of TiO2-ZnO nanocomposite in combination with RGO |
| 초록 |
Zinc oxide and titanium oxide is good photocatalyst. But sometime the activity has decreased because of electron-hole pair recombination. Combination of two or more photocatalyst may help to get rid of this problem by their staircase band structure. Reduced graphene oxide (RGO) can be expected to improve the photocatalytic performance of semiconductor photocatalysts because of its electron mobility and high specific surface area. In this work, we combined ZnO with TiO2 and RGO to synthesize a ternary composite by one pot synthesis method. The amount of GO was varied to know the effect of RGO in the photocatalysis. The rod shaped ZnO and round shaped TiO2 was densely dispersed on thin RGO film. With the increase of amount of RGO in the composite, the photocatalytic activity of the composite was increasing. We found that there is a significant change in photocatalytic activity after adding RGO with ZnO and TiO2. The maximum photoreduction of Cr(VI) was 63% at 120 min with 42 wt% RGO containing composite under UV light irradiation. The mechanism of the photocatalytic activity of RGO- TiO2-ZnO was investigated with the combination of previously synthesized RGO-CdS. Fig. 1 shows the photocurrent response of different photocatalysts prepared in the present work. There was no significant decay of photocurrent for GTZ nanocomposites, while ZnO showed decay with time. |
| 저자 |
정우광, Fatima Tuz Johra
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| 소속 |
신소재공학과 |
| 키워드 |
RGO; ternary composite; photocatalyst; stair case band gap
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| E-Mail |
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