Regulation of morphology and visible light-driven photocatalysis of WO3 nanostructures by changing pH

• 作者: You-Shu Fan Xiao-Li X Yang-Si Liu Zuo-Ren Nie Lin-Yan Zhao Qing-Hua Zhang
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（7）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 1738-1745
• 页数: 8页
• 语种: 英文

摘要

The controlled preparation of hexagonal tung-sten trioxide(h-WO3)nanostructures was achieved by adjusting the pH of the precursor solution.The effect of the pH on the morphology,elemental composition,and pho-tocatalytic performance of the samples was characterized via X-ray diffraction(XRD),scanning electron micro-scopy,energy dispersive X-ray spectroscopy,and Raman spectroscopy.Ultraviolet-visible(UV-Vis)spectra were used to evaluate the absorbance and the photocatalytic performance of methylene blue.Photoluminescence(PL),electrochemical impedance spectroscopy,photocurrent response and Brunauer-Emmett-Teller(BET)were used to study the optical properties,electrical performance,and specific surface area of the WO3-nanostructures,respec-tively.The results indicate that the WO3 nanorods prepared at pH=1.0 exhibit the highest photocatalytic performance(87.4％ in 1 h),whereas the WO3 nanoblocks prepared at pH=3.0 show the lowest.The photocatalytic performance of the one dimensional(1D)-nanorods can be attributed to their high specific surface area and charge transfer ability.The h-WO3 nanostructures were synthesized via a simple method and without a capping agent.They show an excellent photocatalytic performance,which is promising for their application in environment purification.