氧化铋光催化剂(7)

TheXRDpatternsofthesamplesobtainedunderdifferenttem-perature(300°C,350°Cand400°C)areshowninFig.9.Whenthecalcinationtemperaturewas300°Cor350°C,the nalproductwasmixtureoftetragonalBi2O3(b-Bi2O3,JCPDSNo.27-0050)andorthorhomibcBi5O7NO3(JCPDSNo.51-0525),indicatingthat

Table1

Particlesize,absorptionedge,bandgapenergyanddegradationrateofthesamplesobtainedbyPEGwithdifferentmolecularweight.

ParticlesizeWidth(nm)

PEG1000PEG4000PEG6000

214–333190–371238–357

Length(nm)428–762285–1409476–952

439440445

2.912.9062.89

94.0693.2794

Absorptionedge(nm)

Bandgapenergy(eV)

Degradationrate(%)

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