In Situl-Hydroxyproline Functionalization and Enhanced Photocatalytic Activity of TiO₂Nanorods

Abstract

In this study, l-hydroxyproline-functionalized anatase TiO2 nanorods were prepared by a nonaqueous sol−gel route at 80 °C. The resulting samples were characterized by XRD, TEM, HRTEM, XPS, nitrogen adsorption, and UV−vis diffuse reflectance spectroscopy. The presence of l-hydroxyproline on the TiO2 surface was confirmed by the analysis of FT-IR and 13C NMR. It was found that the functionalization of l-hydroxyproline could significantly enhance the photocatalytic activity of TiO2 on the degradation of rhodamine B in aqueous solution under simulated solar light. The reasons for photocatalytic activity enhancement were analyzed on the basis of characterizations. This study provides an alternative functionalization method to improve the photocatalytic activity of TiO2. Meanwhile, the modification of l-hydroxyproline on TiO2 is expected to find new applications in fields of organic catalysis, foodstuffs, cosmetics, and so on.

Review of one-dimensional and two-dimensional nanostructured materials for hydrogen generation

“…5,99 The density of active surface sites increases with increasing SA, [100][101][102] particularly with 1D nanostructures, which have fast charge transfer rates and efficient charge separation. 103 For example, NWs, 93,104,105 NTs, [106][107][108][109][110] NRs/ nanoribbons [111][112][113][114][115][116] and NFs 44,[117][118][119][120][121] have shown great potential for the production of H 2 . However, it is vital to understand which type of 1D structure is better for the generation of H 2 .…”

“…Arrays of NRs have similar effects to NWs, such as a high SA 111,114 promoting surface reactions rather than recombination 151 and short collection lengths for excited carriers in a direction normal to light absorption. Rutile TiO 2 NRs have shown efficient H 2 generation in aqueous solutions containing methanol-water SRs in the presence of Cu 2+ under UV light irradiation.…”

Solvothermal alcoholysis synthesis of hierarchical TiO 2 with enhanced activity in environmental and energy photocatalysis

“…It called "benzyl alcohol route" [95][96][97][98][99][100][101][102][103][104][105][106][107]. The reaction product of benzyl alcohol route is mainly TiO2 nanoparticles.…”

Synthesis, characterization, and visible-light photocatalytic activity of BiOI hierarchical flower-like microspheres

“…The photodegradation of pollutants by semiconductor photocatalysts is a promising approach, which has evoked great interest among scientists. [3][4][5][6] TiO 2 has received tremendous attention throughout the last two decades, because of its wide availability and low toxicity. [7][8][9] TiO 2 has a wide band gap (3.2 eV), so is responsive to ultraviolet wavelengths.…”