A S-scheme heterojunction Fe-doped TiO2/SnO2 with rich oxygen vacancies for photo-Fenton degradation of Rhodamine B under visible light illumination

Facile Preparation of Magnetically Separable Fe3O4/ZnO Nanocomposite with Enhanced Photocatalytic Activity for Degradation of Rhodamine B

“…The red shift observed may have implications for the applications of the composite material in the field of photocatalytic treatment of wastewater. The band gap energy is determined using Tauc’s equation, (αh) 2 = A(hυ − Eg) [ 6 , 15 ], where n is 2 for direct transition semiconductor and n is 1/2 for indirect transition semiconductor [ 8 , 18 ]. α is the absorption coefficient, h is the Planck constant, υ is the frequency, and A is the absorbance constant [ 15 , 18 ].…”

“…The band gap energy is determined using Tauc’s equation, (αh) 2 = A(hυ − Eg) [ 6 , 15 ], where n is 2 for direct transition semiconductor and n is 1/2 for indirect transition semiconductor [ 8 , 18 ]. α is the absorption coefficient, h is the Planck constant, υ is the frequency, and A is the absorbance constant [ 15 , 18 ]. By extending the line to (αh) 2 = 0, the band gap energies of Fe 3 O 4 /ZnO and ZnO are calculated as 2.47 and 3.23 eV, respectively.…”

“…Among various recalcitrant organic pollutants, organic dyes possess the properties of high chroma, huge water volume, toxicity, and low biodegradability, which makes it difficult to purify dye wastewater to a suitable level before releasing it into the environment [1,[8][9][10][11]. The photocatalytic oxidation method, physical coagulation method, Fenton oxidation method, and biodegradation method are now the most frequently used techniques for treating dye wastewater [2,[12][13][14][15][16]. Among these treatment techniques, the semiconductor-based photocatalytic oxidation approach offers the advantages of stability, non-toxicity, high Nanomaterials 2024, 14, 926 2 of 21 efficiency, low energy consumption, and environmentally friendly features, which has drawn a lot of interest from researchers [17][18][19][20].…”

Co-catalyst design to control charge transfer and product composition for photocatalytic H2 production and biomass reforming

“…3 However, its performance is limited by its ability to only absorb the UV light, which dissipates the abundance of solar light. 2,14 CdS photocatalysts that are sensitive to visible light have also been used, but their high charge recombination and toxic cadmium content make them less feasible for the photocatalytic reaction. 2,15 Due to the easy method for synthesis and a great physicochemical stability, graphitic carbon nitride (g-C 3 N 4 ) is widely used for photocatalytic processes.…”

Visible light photocatalytic NOx removal with suppressed poisonous NO2 byproduct generation over simply synthesized triangular silver nanoparticles coupled with tin dioxide

“…[12][13][14][15][16][17][18][19][20][21][22] As an n-type metal oxide semiconductor, SnO 2 has been extensively applied in photoelectrochemistry because of its advantages, such as high stability, non-toxicity, and cost-effectiveness. However, the use of SnO 2 as a single catalyst is not efficient enough due to the large bandgap and rapid charge recombination; 23 accordingly, many modication strategies such as doping, 24,25 morphology control, 26,27 and incorporation of a co-catalyst 28,29 have been devoted to further enhance the photocatalytic efficiency. Among these approaches, coupling with a plasmonic co-catalyst, typically silver (Ag), is benecial for not only expanding the light absorption range but also enhancing photogenerated charge separation.…”