Synthesis by sol–gel of WO3/TiO2 for solar photocatalytic degradation of malathion pesticide

Preparation of N doped TiO2 via microwave-assisted method and its photocatalytic activity for degradation of Malathion

“…The point of zero charge on the surface of catalyst was found to be at pH 6.8 [42], Thus, a pH will have a considerable effect on adsorption and desorption process. Moreover, it has been reported that Malathion is stable in highly acidic condition [43]. At higher pH, the surface of the catalyst has a net negative charge and the degradation rate is found to be lower [44].…”

Industrial synthesis and characterization of nanophotocatalysts materials: titania

“…With the advancement of material science and the evolution of synthetic methodologies allowing strict control of phase, size, and dispersion [22], now, it is possible to control the photocatalytic properties [23,24]. TiO 2 -coated windows and tiles are examples of self-cleaning materials; such materials have been used inside and outside to help the urban control of air pollutants.…”

“…These reactions are very sensitive to variables such as pH of the reaction, reflux temperature, water concentration, reaction time, and nature of the solvent. After obtaining the gel, following the aging, these then were dried and given heat treatment to obtain the desired nanophotocatalysts [23,24]. This technique presents several advantages like versatility (to produce thin films and coatings, monoliths, composites, porous membranes, powders, and fibers), extended composition ranges, high homogeneity, high purity, and less energy consumption.…”

Production of heterostructured TiO2/WO3 Nanoparticulated photocatalysts through a simple one pot method

“…[2] Despite TiO 2 being the most studied semiconductor in photocatalytic processes, [3] some drawbacks such as its wide band gap energy -which requires UV light for excitation -and a relative fast electron-hole recombination still need be addressed. [4,5] Coupling TiO 2 with other semiconductors has been shown to be an effective way to reduce the recombination rate. [6,7,8] This behavior is attributed to the charge migration between the interconnected phase, forming a heterostructure or material with distinct crystalline phases in one particle and sharing at least one surface in a coherent manner [9,10,11,12] In any heterostructure, because the Fermi levels should be the same at the semiconductor's interface, the charge separation (for different phases) will occur when the system is illuminated.…”