FOTOREAKSI TERKATALISASITitania supported gold nanoparticles as photocatalyst

DISUSUN OLEH :• Wilda Rosmaya A 11/311579/PA/13548

• Fauzin Naimah 11/312933/PA/13611

• Sulistya Eka Rachmawati 11/313579/PA/13702

• Siti Dewi Rahayu 11/313687/PA/13744

• R Dwi Kreshna S P 11/317003/PA/14121

• Mutiara Ayu Pratami 11/317010/PA/14128

• Anita 11/317033/PA/14150

• Dyah Ayu Ratna K 11/317044/PA/14161

• Inna Yusnila Khairani 11/317078/PA/14195

• Dyla Anisa 11/320055/PA/14323

• Katalis yang digunakan : P25 TiO2 (80% anatase, 20% rutile)

• Metal doped : Au(III)

• Panjang gelombang : 520-570 nm

• Aplikasi : Photooksidasi 2-prropanol

• Dengan tahap deposisi-presipitasi :

•Alasan digunakannya metal doped :

TiO2 dapat digunakan sebagai material fotokatalis dengan sinar pada gelombang UV, sedangkan dalam aplikasinya akan digunakan dengan sinar matahari dimana hanya mengandung 4% sinar UV dan sisanya merupakan sinar visible. Sehingga TiO2 harus didoping dengan metal agar dapat menyerap/digunakan pada sinar visible.

KELEBIHAN METAL DOPED AND NON-METAL DOPED

SKEMA FOTOREAKSI

One of the key points of the use of the Au/TiO2 is the possibility to introduce response in the material upon irradiation with visible light by excitation on the surface plasmon bandof gold. However, even in those cases in which visible light photocatalytic activity has been observed for Au/TiO2,no conclusive evidence of the direct excitation of gold has been obtained.

This mechanism of action, consisting of the excitation of gold to promote charge separation, can be firmly supported by determining the photoresponse spectrum and showing its coincidence with the surface plasmon band.

REAKSI :1. (TiO2)Au + hv → (TiO2(e- + h+))Au

2. (TiO2(e- ))Au + O2 → (TiO2)Au + O2-

3. (TiO2(h+))Au + OH- → (TiO2)Au + OH•

REFERENSIPrimo, A, Avelino Corma and Hermenegildo Garcı´a., 2011, Titania supported gold nanoparticles as photocatalyst, Physic al Chemistry Chemical Physics, page 886-910