“…The obtained ZnO-SnO 2 hollow spheres showed much stronger absorbance intensities and larger absorbance region than ZnO hollow spheres. This result indicates that the formation of heterostructure is beneficial for photocatalytic performance in the UV and visible light regions [21]. Fig.…”
ZnO-SnO2 hollow spheres were successfully synthesized through a hydrothermal method-combined carbon sphere template. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FT-IR). The average diameter of hollow spheres is about 150 nm. The photocatalytic activity of the as-prepared samples was investigated by photodegrading Rhodamine B. The results indicated that the photocatalytic activities of ZnO-SnO2 hollow spheres are higher than ZnO hollow spheres. The degradation efficiency of the hollow spheres could reach 99.85% within 40 min, while the ZnO hollow spheres need 50 min.
“…The obtained ZnO-SnO 2 hollow spheres showed much stronger absorbance intensities and larger absorbance region than ZnO hollow spheres. This result indicates that the formation of heterostructure is beneficial for photocatalytic performance in the UV and visible light regions [21]. Fig.…”
ZnO-SnO2 hollow spheres were successfully synthesized through a hydrothermal method-combined carbon sphere template. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FT-IR). The average diameter of hollow spheres is about 150 nm. The photocatalytic activity of the as-prepared samples was investigated by photodegrading Rhodamine B. The results indicated that the photocatalytic activities of ZnO-SnO2 hollow spheres are higher than ZnO hollow spheres. The degradation efficiency of the hollow spheres could reach 99.85% within 40 min, while the ZnO hollow spheres need 50 min.
“…23b). 39 Unlike previous reports on conventional surface loading or growth of co-catalyst nanoparticles, direct amalgamation of co-catalyst during the electrospinning of TiO 2 nanofibers in our work ensures good stability and recyclability due to the resistance of the co-catalyst against leaching. The Please do not adjust margins Please do not adjust margins resultant wheat grain-like textured heterostructure with embedded co-catalyst ensures high surface contact and intimate interface for enhanced photocatalytic H 2 generation of 16.8 times higher than that of bare TiO 2 nanofibers.…”
TiO 2 -based photocatalyst being inexpensive and abundant in conjunction with high photostability and environmental friendly characteristics makes it the most extensively studied photocatalytic material for hydrogen production and pollutant degradation. However, its existing issues such as wide bandgap, high overpotential and rapid recombination of photogenerated carriers limit its photocatalytic properties. The opportunities for structural development of TiO 2 nanomaterial towards highly efficient and pragmatic photocatalysis applications are evidently plentiful. Hence in this review, we will look into critical structural engineering strategies that endow favorable physicochemical properties such as improved light absorption, photostability, charge-carrier dynamics, increase surface area etc. that benefit photocatalysis functionalities. Amongst the various structural engineering constitutions, we will be covering the most prevalent and elegant core-shell and hierarchical structural designs that rationally combine the advantages of structural manipulation and multi-material composition engineering. This review aims to provide a comprehensive and contemporary overview as well as a guide of the development of new generation TiO 2 based photocatalysts via structural design for improved solar energy conversion technologies.
“…From the UV-vis spectra, it was observed that energy gap decreased with the increasing of CuO loading. According to the literatures [18][19][20], the catalytic activity of the metal oxide semiconductor catalyst is related to its band gap energy. CuO is a p-type semiconductor with narrow band gap, while ZnO and TiO 2 are n-type semiconductors [21][22][23].…”
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