Photocatalytic degradation of phenol by semiconducting mixed oxides derived from Zn(Ga)Al layered double hydroxides

Harnessing self-supported Au nanoparticles on layered double hydroxides comprising Zn and Al for enhanced phenol decomposition under solar light

“…0.42 g of Zn 2 Al-LDH was added to the aqueous solution and the mixture was stirred at a rate of 900 rpm and 290 K for 12 h. The precipitate was filtered using a membrane filter (JGWP04700 filter, Omnipore) and washed with deionized water (total 250 mL), and dried under vacuum at 290 K for 24 h. Obtained powder was added to 10 mL of dehydrated toluene (>99.5%, Wako Pure Chemical) and 0.0126 g of NaBH 4 (>95%, Wako Pure Chemical) was added to the suspension. After stirring for 10 min, 3 mL of ethanol (>99.5%, Wako Pure Chemical) was added and the mixture was stirred at a rate of 900 rpm and 290 K for 6 h. The precipitate was filtered and washed using JGWP04700 filter with deionized water and ethanol (total 250 mL for each), and dried under vacuum at 290 K for 24 h [15]. The sample was denoted as Au/Zn 2 Al-Imp-NaBH 4 (Table 1e).…”

“…Among the numerous materials of large surface area, layered double hydroxides (LDHs) exhibits unique features not found in other solid supports if used as support materials for AuNPs, thus making AuNPs/LDHs composites specific catalysts [15]. The flexibility of the LDHs composition, their semiconducting characteristics [4], and their high adsorption capacity enables to tune the electronic density at the interface between AuNPs and LDHs.…”

Layered Double Hydroxide Materials in Photocatalysis

“…In addition, the amount of hydroxyl radicals can be detected by the luminescence technique using terephthalic acid (TA) as probe molecules, and the Co-doped LDH also shows more surface hydroxyl radicals. Up to now, various metal ion dopants have been introduced into the LDH host layers to tune the textural properties and photocatalytic activity, such as Fe-MgAl-LDH [32], NiZnCr-LDH [33], Ga-ZnAl-LDH [34], Ti-ZnAl-LDH [26], and In-MgZn-LDH [35].…”

Enhanced photocatalytic activity of TiO2-impregnated with MgZnAl mixed oxides obtained from layered double hydroxides for phenol degradation

“…Controlled thermal decomposition (calcination) of LDHs leads to collapse of layered structure and formation of mixed oxides M 2+ (M 3+ )O [12,16,17].…”