Comparative study on photocatalytic performances of crystalline α- and β-Bi2O3 nanoparticles under visible light

By M. Jalalah, M. Faisal, H. Bouzid, Jea‐Gun Park, S. Al‐Sayari, A. Ismail. 2015

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Abstract α- and β-Bi2O3 nanoparticles were synthesized in the presence of either urea or polyethylene glycol. The XRD, TEM, and Raman analysis indicated that α-(monoclinic) Bi2O3 nanoparticles were obtained using either sol–gel or hydrothermal method in the presence of urea; however β-(tetragonal) phase of Bi2O3 was formed using hydrothermal method in the presence of polyethylene glycol. The β-Bi2O3 nanoparticles exhibited higher photocatalytic activity than α-Bi2O3. MB was completely photodegraded after 6 h of visible light illumination using β-Bi2O3 photocatalyst whereas only 30% was photodegraded using α-Bi2O3. The photodegradation rate of β-Bi2O3 was 5.7 times greater than that α-Bi2O3 nanoparticles.

Subfields: Electrical and Electronic Engineering, Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/a8aa871246838a67a6adcf5054fe03f2f6f38642