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The WO 3 /SiO 2 catalyst was prepared by sonication–impregnation combination approach using commercial silica gel as support. Influences of various factors on the yield of glutaraldehyde, such as WO 3 loading and calcination temperature, were investigated and discussed in terms of the characterizations results of BET, XRD, Raman, FT-IR and XPS. It was found that the yield of...
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