Titania–supported silver nanoparticles: An efficient and reusable catalyst for reduction of 4-nitrophenol

A review on plasmonic metal⿿TiO2 composite for generation, trapping, storing and dynamic vectorial transfer of photogenerated electrons across the Schottky junction in a photocatalytic system

“…The deposited Ag particles served as electron traps to hinder charge carrier recombination [151]. TiO 2 nanoparticles synthesized via in situ sol-gel method followed by Ag deposition via reduction method with dextrose as reductant and sodium dodecyl sulfate as stabilizer exhibited excellent reduction of 4-nitrophenol to 4-aminophenol at room temperature suggesting the commercial exploitation of heterogeneous catalyst for the reduction of nitrocompounds [152]. Ag/TiO 2 with Ag > 0.5 wt% exhibited significant efficiency for the degradation of amoxicillin and 2,4-dichlorophenol (endocrine disturbing compounds) under artificial solar light when compared to TiO 2 [153].…”

Green and simple synthesis of Ag nanoparticles loaded onto cellulosic fiber as efficient and low-cost catalyst for reduction of 4-nitrophenol

“…The UV-Visible spectra of 4-NP aqueous solution have an absorption band centered at 323 nm [19] but by addition of NaBH 4 , it shifted to the 408 nm due to formation of 4-nitrophenoxy ion [11]. This spectra shift is presented in Fig 4a. Without addition of catalyst, the intensity of the peak at 408 nm changes very slowly over the long time ( Fig.…”

“…One of the best model systems which has been used for study of catalytic process is reduction of 4-nitrophenol (4-NP) to 4-aminophenol in the presence of NaBH 4 [10][11][12]. Kinetics of this system can be followed by disappearing the peak of 4-nitrophenolate ion (at 400 nm) and appearing the peak of product at 302 nm using UV/Visible spectroscopy.…”

Role of solvents on photocatalytic reduction of nitroarenes by sol–gel synthesized TiO2/zeolite-4A

“…In particular, TiO 2 possesses redox potential suitable for reduction of nitroarenes. [19,20] Several photocatalytic reduction of nitroarenes mediated by TiO 2 and doped TiO 2 have been reported [21][22][23][24] Majority of these studies have been carried out by using additional reducing agents such as NaBH 4 and Na 2 SO 3 . However, reduction without additional reductants would be desirable.…”