New nanostructured CdS fibers for the photocatalytic reduction of 4-nitrophenol

Electrophoretic deposition of photocatalytic materials

Powdered photocatalytic materials have been successfully applied for the degradation of organic and inorganic pollutants as well as for hydrogen production and CO₂ photo-reduction. However, the development of strategies for the preparation of photoactive coatings is a hot topic since it is a promising step for its use in photocatalytic reactors on an industrial scale. Electrophoretic deposition is a versatile technique capable to produce coatings of nanoparticles at a relative low cost and with an excellent quality and control of the deposited material. This work summarizes the fundamental aspects of the electrophoretic deposition process, as well as the latest contributions in the deposition of several photocatalytic materials including TiO₂ and other UV-photocatalysts like ZnO, ZnS, SrTiO₃ and PbMoO₄ in addition to visible-light-driven photocatalysts such as Bi₂O₃, CdS, CdSe, g-C₃N₄, among others. Furthermore, the morphological features of the coatings along with the repercussion in the photocatalytic performance are issues discussed in the present review, based on the effect of the multiple parameters of the electrophoretic process such as the applied voltage, the deposition time, the inter-electrode distance, the concentration of the particles, the solvents and additives.

Improving photocatalytic reduction of 4-nitrophenol over ZrO2–TiO2 by synergistic interaction between methanol and sulfite ions

Reaction rate for 4-nitrophenol photoreduction over ZrO₂–TiO₂ increases 19 times due to the synergistic interaction between methanol and sulfite ions.

R. S, Nair BN, Karunakaran V, Mohamed AP, Warrier KGK, Hareesh US. A facile one pot synthetic approach for C3N4–ZnS composite interfaces as heterojunctions for sunlight-induced multifunctional photocatalytic applications

Herein, we report a facile one pot synthetic protocol for the creation of C₃N₄–ZnS composite interfaces by the co-pyrolysis of a precursor mix containing zinc nitrate, melamine, and thiourea at 550 °C in air.

Synthesis of new ZnS–Bipy based hybrid organic–inorganic materials for photocatalytic reduction of 4-nitrophenol

4,4-Bipyridine ligand was attainted to react with ZnS surface forming ZnS–Bipy materials that are efficient catalysts for photoreduction of 4-nitrophenol.