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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 52, Number 1
JKCSEZ 52(1)
February 20, 2008 

 
Title
Photomineralisation of Reactive Black 5 with ZnO using Solar and UV-A Light

태양광과 UV-A 빛 하에서 ZnO 을 이용한 Reactive Black 5의 광분해작용
Author
S. Amisha, K.Selvam, N. Sobana, M. Swaminathan*

S. Amisha, K.Selvam, N. Sobana, M. Swaminathan*
Keywords
광 촉매, Reactive Black 5, 아연산화물, 동력학적 분석, UV-A빛(300-400 nm), 태양광 , Photocatalysis, Reactive Black 5, Zinc Oxide, Kinetic Analysis, UV-A Light (300-400 nm), Solar Light
Abstract
태양광과 UV-A빛 조건하에 수용액 속에서 디아조염료의 광 촉매분해반응에 대해 조사를 해보았다. 염료의 광 촉매 분해반응에는 염료의 농도, 촉매 량, 그리고 pH와 같은 여러 가지 영향 요소들이 존재한다. 과산화수소, ammonium persulphate와 isopropanol 등의 첨가는 분해비율에 대해 큰 영향을 미친다. Langmuir-Hinshelwood model에 근거한 광 분해반응의 동역학적분석은 광분해반응은 대략적으로 pseudo first order kinetics을 따름을 알 수 있다. 광분해산물로 이산화탄소, 질산염, sulphate 이온 등이 증명되었다. 광 촉매, ZnO는 태양광 하에서보다 UV-A빛 하에서 더욱 효율적임을 발견하였다.

The photocatalytic degradation of a textile diazo dye in aqueous solution has been investigated under Solar and UV-A light. The effect of various parameters such as concentration of dye, amount of catalyst and pH on the degradation of dye has been studied. Addition of hydrogen peroxide, ammonium persulphate and isopropanol strongly influences the degradation rate. Kinetic analysis of photodegradation reveals that the degradation follows approximately pseudo first order kinetics according to the Langmuir-Hinshelwood model. Carbon dioxide, nitrate and sulphate ions have been identified as mineralisation products. The photocatalyst ZnO was found to be more efficient in UV-A light than in Solar light.

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