Highly efficient CuO incorporated TiO2 nanotube photocatalyst for hydrogen production from water

Hydrogen Photoproduction from Ethanol–Water Mixtures Over Au–Cu Alloy Nanoparticles Supported on TiO2

“…In this way, no significant shift of the plasmon band was determined (523 vs. 524 nm for Au and Au 0.75 Cu 0.25 alloy, respectively), which is in accordance to [39]. The absence of a large absorption band between 400 and 800 nm ascribed to oxidized Cu species [11,19,20,26] indicated that Cu was alloyed with Au in a metallic state, in accordance to HRTEM analysis. When the amount of Cu in the alloy nanoparticles was higher, Au 0.5 Cu 0.5 and Au 0.25 Cu 0.75 , the plasmon resonance band broadened to an extent that it was no longer visible (Fig.…”

“…The drawback, however, is the high costs incurred by the use of noble metals. For this reason, increasing attention has been devoted to Cu/Cu 2 O/CuO nanoparticles dispersed on TiO 2 [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] to attain a cost-effective photocatalyst. Copper species with smaller bandgap and higher work function than bare TiO 2 facilitates light harvesting and charge carrier separation in Cu/TiO 2 .…”

Applications of Metal/Mixed Metal Oxides as Photocatalyst: A Review

“…It was found that 10 wt.% Cu/TiO 2 calcined at 300 °C for 30 min yielded the maximum quantity of hydrogen. Xia [16] found that highly dispersed CuO was introduced into TiO 2 nanotube (TNT) made by hydrothermal method via adsorption-calcination process or wet impregnation process to fabricate CuO incorporated TNT photocatalysts (CuO-TNT) for hydrogen production. This high photocatalytic activity of CuO -TNT was mainly attributed to the unique 1-D tubular structure, large BET surface area and high dispersion of copper component.…”

Synthesis of molecularly imprinted polypyrrole/titanium dioxide nanocomposites and its selective photocatalytic degradation of rhodamine B under visible light irradiation

“…When the recognition sites were filled up, the rate of adsorption dropped significantly and adsorption process achieved equilibrium gradually. In order to investigate the underlying mechanism of the adsorption process, the kinetic data obtained were analyzed using pseudo-first-order rate equation (Equation (9)) and pseudo-second-order rate equation (Equation (10)): (9) (10) where Q e [µmol/g] and Q t [µmol/g] are the adsorption amount at equilibrium and time t [min], respectively, k 1 (min -1 ) and k 2 (g/(µmol!min)) are pseudofirst-order and pseudo-second-order rate constants of adsorption, respectively. The adsorption kinetic constants for the pseudofirst-order rate equation and pseudo-second-order rate equation are listed in Table 1.…”

“…However, it has a wide band gap (3.0-3.2 eV), and usually cannot be effectively activated by the solar light for degradation of pollution [4]. Much work have been tried to improve the photocatalytic efficiency of TiO 2 under visible light irradiation by transforming its optical response from the UV to the visible range, such as by metal doping [5,6], nonmetal doping [7,8], surface dye sensitization [9] and forming composites with other semiconductors [10,11]. Recently, conductive polymers have emerged as stable photosensitizers to modify TiO 2 nanoparticles owning to their remarkable physical attributes and electrical properties [12].…”