Catalytic reduction of p-nitrophenol on Au/TiO2 powder and Au/TiO2 membrane

The current work reports on the development of Au nanoparticles (NPs) supported titania membrane towards enhancing catalytic reduction p-nitrophenol. Titania was successfully fabricated via chemical anodization method at 50 V in ethylene glycol: water as electrolyte. A well-ordered nanotubular array 138±18 nm pore diameter observed by electron microscope. NPs were deposited form (Au/TiO2 MF) immersing precursor (HAuCl4) solution pH 7 for 2 hours. Meanwhile, preparation Au/TiO2 powder (PF) follows similar procedures but using commercial TiO2 (Degussa P25). FTIR result shows shifting peak 1067 cm-1 to 1107 cm−1 and MF, respectively which corresponds Ti-O bond. Meanwhile bond shifted from 1066 (titania powder) 1097 PF. IR indicates successful attachment titania. Surface morphology FESEM 27.95±5.8 30.59±2.11 size obtained MF PF, respectively. exhibits superior activity p-nitrophenol, with a rate constant (k) value 5.9 x 10-3 s−1. slight decreased k after this catalyst been reused. This study offers an effective high good stability.