FOTODEGRADASI FENOL DALAM LEMPUNG TERPILAR TIO2 (PHOTODEGRADATION OF PHENOL ON TIO2-PILLARED-KAOLINITE

Indonesian Journal of Pure and Applied Chemistry Pub Date : 2021-04-30 DOI:10.26418/indonesian.v3i2.46491

I. Silalahi, Nelly Wahyuni, I. Irwan

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Abstract

Photodegradation of phenol on TiO2-pillared-kaolinite was observed. Pillarization of kaolinite was conducted through intercalation of polyoxotitanium sol into clay suspension followed by calcination giving TiO2-kaolinite which showed an increase in specific surface area and total pore volume compared with the kaolinite. The analysis of XRD demonstrated no significant change on d-space of second order of kaolinite structure associated with 2q 26.61°, but diffractions with regard to 2q 25.3° and 48.0° interpreted for TiO2 anatase were seen on the diffractogram of TiO2-kaolinite. The significant decrease of phenol concentration was observed in the presence of both kaolinite and TiO2-kaolinite under UV illumination (hn ³ 365 nm) compare with the photoreaction without the kaolinite materials however the degradation rate of phenol on TiO2-kaolinite was faster than that on the kaolinite-only where 50% of phenol was consumed after 45 minutes of reaction. Kinetic study showed the photoreaction of phenol on TiO2-kaolinite follows the first order reaction with the reaction rate constant of 1.8 x 10-2 min-1.

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研究了苯酚在二氧化钛柱状高岭石上的光降解。通过将多氧钛溶胶插入到粘土悬浮液中，然后煅烧得到tio2 -高岭石，高岭石的柱化比高岭石的比表面积和总孔隙体积都有所增加。XRD分析表明，2q 26.61°对二级高岭石结构的d空间没有明显变化，但TiO2-高岭石的衍射图上却出现了2q 25.3°和48.0°对TiO2锐钛矿的衍射。在UV光照(hn³365 nm)下，与不添加高岭石材料的光反应相比，同时添加高岭石和tio2 -高岭石时，苯酚的浓度显著降低，但tio2 -高岭石上苯酚的降解速度比高岭石上快，反应45分钟后，苯酚的50%被消耗。动力学研究表明，苯酚在tio2 -高岭石上的光反应为一级反应，反应速率常数为1.8 x 10-2 min-1。

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Indonesian Journal of Pure and Applied Chemistry

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