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Jalalah, M.,Faisal, M.,Bouzid, H.,Park, J.G.,Al-Sayari, S.A.,Ismail, A.A. Korean Society of Industrial and Engineering Chemi 2015 Journal of industrial and engineering chemistry Vol.30 No.-
α- and β-Bi<SUB>2</SUB>O<SUB>3</SUB> nanoparticles were synthesized in the presence of either urea or polyethylene glycol. The XRD, TEM, and Raman analysis indicated that α-(monoclinic) Bi<SUB>2</SUB>O<SUB>3</SUB> nanoparticles were obtained using either sol-gel or hydrothermal method in the presence of urea; however β-(tetragonal) phase of Bi<SUB>2</SUB>O<SUB>3</SUB> was formed using hydrothermal method in the presence of polyethylene glycol. The β-Bi<SUB>2</SUB>O<SUB>3</SUB> nanoparticles exhibited higher photocatalytic activity than α-Bi<SUB>2</SUB>O<SUB>3</SUB>. MB was completely photodegraded after 6h of visible light illumination using β-Bi<SUB>2</SUB>O<SUB>3</SUB> photocatalyst whereas only 30% was photodegraded using α-Bi<SUB>2</SUB>O<SUB>3</SUB>. The photodegradation rate of β-Bi<SUB>2</SUB>O<SUB>3</SUB> was 5.7 times greater than that α-Bi<SUB>2</SUB>O<SUB>3</SUB> nanoparticles.
Mohammed Jalalah,Adel A. Ismail,M. Faisal,Houcine Bouzid,Jea-Gun Park,S.A. Al-Sayari 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.30 No.-
a- and b-Bi2O3 nanoparticles were synthesized in the presence of either urea or polyethylene glycol. TheXRD, TEM, and Raman analysis indicated that a-(monoclinic) Bi2O3 nanoparticles were obtained usingeither sol–gel or hydrothermal method in the presence of urea; however b-(tetragonal) phase of Bi2O3was formed using hydrothermal method in the presence of polyethylene glycol. The b-Bi2O3nanoparticles exhibited higher photocatalytic activity than a-Bi2O3. MB was completely photodegradedafter 6 h of visible light illumination using b-Bi2O3 photocatalyst whereas only 30% was photodegradedusing a-Bi2O3. The photodegradation rate of b-Bi2O3 was 5.7 times greater than that a-Bi2O3nanoparticles.