Exploration of Ag decoration and Bi doping on the photocatalytic activity α‐Fe₂O₃ under simulated solar light irradiation

Abstract

In the present investigation, silver decorated and bismuth doped a-Fe 2 O 3 (Ag/Bi-Fe 2 O 3 ) was successfully synthesized using the co-precipitation method. The size, shape, surface area, and magnetic properties were characterized by XRD, FE-SEM, EDX, BET, VSM, and UV-Vis-DRS techniques. The synthesized nanoparticles were used as a photocatalyst for the degradation of rose bengal (RB) dye under simulated solar light irradiation. Ag/Bi-Fe 2 O 3 showed the better photocatalytic activity of 97.11 % within 135 min when compared to Bi-Fe 2 O 3 and Ag-Fe 2 O 3 . The superior photo-catalytic activity of Ag/Bi-Fe 2 O 3 was mainly ascribed to visible light absorption and the suppression of photo-generated electron-hole recombination. Ag/Bi-Fe 2 O 3 was found to be a stable photocatalyst during recycling experiments. Besides, the magnetic property of Ag/Bi-Fe 2 O 3 makes it an ideal candidate for separation and recovery during recycling.

Polyacrylonitrile/α‐Fe2O3 Hybrid Photocatalytic Composite Adsorbents for Enhanced Dye Removal

“…To evaluate the possibility of using the a- Peanut stick 2.54 [43] Sugar extracted spent rice biomass 8.13 [44] Orange peel 18.6 [24] Wheat shell 21.5 [22] Wood waste activated carbon 4.94 [45] Treated bagasse 8.04 [46] T…”

“…Since these materials in their basic forms are activated only by UV light, finding a visible light-activated photocatalyst will solve many problems. a-Fe 2 O 3 , known as hematite, absorbs light up to 600 nm since it has a narrow band gap of 2.0-2.2 eV [21,22]. Moreover, it is fully capable of gaining around 40 % of sunlight which means it is activated naturally under visible light, and there is no need to introduce any extra UV lamps for activation.…”

Structural and optical properties of silver supported α-Fe2O3nanocomposite fabricated bySaraca asocaleaf extract for the effective photo-degradation of cationic dye Azure B

“…Several effective approaches were investigated for this purpose. [27][28][29][30] The technique used to prevent the short lifetime of photogenerated (e − -h + ) pairs and decrease its band gap energy is to incorporate various types of metal into the surface of iron oxide nanoparticles. These techniques can signicantly boost the separation rate of photogenerated charge carriers in semiconductor materials, which will raise the efficiency of the photocatalytic process.…”

Nanostructuring Bi-Doped α-Fe2O3 Thin-Layer Photoanode to Advance the Water Oxidation Performance

“…Furthermore, Rajamohan et al fabricated Ag and Bi codoped Fe 2 O 3 to improve the simulated solar-light activated catalysis. 46 The catalytic enhancement is induced with the existing donor level formation in Fe 2 O 3 , leading to a higher light absorbance property. On the basis of the above-mentioned works, incorporating Bi into α-Fe 2 O 3 is very interesting in improving photoelectrochemical water oxidation.…”

“…Furthermore, Rajamohan et al. fabricated Ag and Bi codoped Fe 2 O 3 to improve the simulated solar-light activated catalysis . The catalytic enhancement is induced with the existing donor level formation in Fe 2 O 3 , leading to a higher light absorbance property.…”