Facile Preparation of Efficient WO₃ Photocatalysts Based on Surface Modification

Figure 4

(a) Absorption spectra for MB degradation using Cu(II)-WO₃/TiO₂. (b) The variation of MB concentration by photocatalytic reaction with bare WO₃, Cu(II)-WO₃, and Cu(II)-WO₃/TiO₂, respectively. (c) The pseudo-first-order kinetic rates with error bars for the photochemical degradation of MB by bare WO₃, Cu(II)-WO₃, and Cu(II)-WO₃/TiO₂, respectively. (d) Cycling measurements of MB decomposition over Cu(II)-WO₃/TiO₂.

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