Preparation of Bismuth Nanoparticles in Aqueous Solution and Its Catalytic Performance for the Reduction of 4-Nitrophenol

Abstract

A simple method to fabricate Bi nanoparticles by using redox reactions between sodium borohydride and ammonium bismuth citrate in the presence of soluble starch in water phase was developed. The results show that soluble starch is better than PVP in stabilizing Bi nanoparticles. The as-prepared Bi nanoparticles were characterized by Fourier transform infrared spectroscopy, transmission electron microscopy, energy-dispersive X-ray, and powder X-ray diffraction. The catalytic performance of the Bi nanoparticles for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) in the presence of sodium borohydride was studied. The effects of sodium borohydride concentration, initial 4-NP concentration, catalyst dose, and reduction temperature were also investigated.

One-step synthesis of magnetically recyclable Co@BN core–shell nanocatalysts for catalytic reduction of nitroarenes

“…This kind of phenomenon seems abnormal, Xia et al explained that a high concentration of 4nitrophenol may cover almost the entire surface of the catalyst, which limits electron transfer from NaBH 4 to 4-nitrophenol and thus hinders the catalytic action of NaBH 4 . 64 The slope of the line given in the insert of Fig. 6a, 0.98 z 1, suggests that the reaction is rst order with respect to the 4-nitrophenol concentration.…”

“…8b. 64 This is a six-electron transfer process. 73 Finally, 4-aminophenol is desorbed from the surface of Co@BN catalysts and dispersed in the reaction solution.…”

Use of A Hydroalcoholic Extract of Moringa oleifera Leaves for the Green Synthesis of Bismuth Nanoparticles and Evaluation of Their Anti-Microbial and Antioxidant Activities

“…Bismuth nanoparticles with better catalytic activity were synthesized by the redox reactions between ammonium bismuth citrate and sodium borohydride in the presence of soluble starch in aqueous phase [34]. Bismuth nanodots were synthesized by the redox reaction between D-glucose and bismuth nitrate, in the presence of polyvinylpyrrolidone in the basic aqueous phase.…”

Insights into the growth of bismuth nanoparticles on 2D structured BiOCl photocatalysts: an in situ TEM investigation

“…The dependence of tunability of surface plasmon resonance band from ultraviolet to infrared on size and shape of metal particles was also revealed in both theoretical calculations and experimental studies. [16][17][18][19] Inspired by the LSPR effect of nanostructured bismuth, various bismuth/bismuth-containing-semiconductor (Bi/BCS) hybrid systems have recently been synthesized and demonstrated as superior photoactive materials compared to alone BSC, and it is due to the heterojunction-like contact between bismuth nanoparticles and BCS that promotes the harvesting of visible light and efficient separation of photogenerated carries in these hybrid systems. A few routes of "one-pot" synthesis were also reported for the preparation of Bi/BCS composites using bismuth containing salts and reductants as the precursor materials, such as Bi/(BiO) 2 CO 3 and Bi/BiOX (X=Cl, Br, I), etc.…”