Morphology‐controlled Fabrication of SnO₂/ZnO Nanocomposites with Enhanced Photocatalytic Performance

Abstract

In this work, a series of novel SnO2/ZnO nanocomposites with different morphologies were fabricated via a facile hydrothermal technique followed by calcination in air. The morphological, structural and photocatalytic properties of the SnO2/ZnO nanocomposites were studied using different methods. The results showed that the synthesized nanocomposites possessed crystal phases of wurtzite hexagonal phase ZnO and tetragonal rutile phase SnO2. In addition, the morphologies of SnO2/ZnO nanocomposites strongly depended on the molar ratios of Sn and Zn. Compared with ZnO and SnO2, the SnO2/ZnO nanocomposites exhibited considerably higher degradation efficiency for the photodegradation of methylene blue and quinolone antibiotics under mercury lamp irradiation. The SZ‐2 nanospheres exhibited the highest degradation efficiency of 95.81%, which was about 2.63 times higher than that of ZnO nanoparticles. Moreover, the trapping experiments confirmed that ˙OH played the dominant role in MB degradation. Finally, the charge carriers potential transfer pathway and photocatalytic degradation mechanism were put forward. This study provides an economical way to prepare hybrid nanocomposites with controlled morphology for practical applications in the photocatalytic degradation of organic dyes and residual antibiotics.

Self-Cleaning Bending Sensors Based on Semitransparent ZnO Nanostructured Films

“…In the case of the seedless sample, the (100) peak is more intense than the (101) and the (002) peaks, respectively. The peak patterns of the seeded sample are in accord with previous reports dealing with 2D NSs, 37 as well as ZnO NCs, 38 showing a preferential (101) plane orientation and lacking a preferential orientation along the c-axis, which is typical of ZnO NWs. The higher (100) plane orientation of the seedless sample can be ascribed to the exposure of the lateral prismatic planes of the ZnO NFs.…”

An overview of prominent factors influencing the photocatalytic degradation of cationic crystal violet dye employing diverse nanostructured materials

“…Furthermore, this has created chances to explore their application as photocatalysts in a variety of fields 154 . SnO 2 /ZnO nanocomposites with varying molar ratios of Sn:Zn (0.07:1, 0.1:1, 0.3:1 and 0.5:1) were created by Yu et al 155 . and designated SZ‐1, SZ‐2, SZ‐3 and SZ‐4, in that order.…”

Facile one-pot synthesis of heterostructure SnO2/ZnO photocatalyst for enhanced photocatalytic degradation of organic dye

“…As a consequence, coupling of SnO 2 with ZnO has been the subject of many research groups for achieving an efficient charge separation and improving the photocatalytic properties of ZnO and SnO 2. [47][48][49][50][51][52] In this context, the heterostructure SnO 2 /ZnO nanoparticles have been prepared by different methods like coprecipitation, 53,54 hydrothermal synthesis, 49,50 precipitation followed by hydrothermal, 55 sol-gel. 56,57 The SnO 2 /ZnO nanocomposites with a molar ratio Zn : Sn of 2 : 1 synthesised by coprecipitation method showed higher photocatalytic degradation of methyl orange (MO) than the individual ZnO and SnO 2 .…”

“…56,57 The SnO 2 /ZnO nanocomposites with a molar ratio Zn : Sn of 2 : 1 synthesised by coprecipitation method showed higher photocatalytic degradation of methyl orange (MO) than the individual ZnO and SnO 2 . 53 Yu et al 49 synthesized SnO 2 /ZnO nanocomposites via hydrothermal technique followed by calcination in air that exhibited considerably higher degradation efficiency for the photodegradation of methylene blue and quinolone antibiotics under mercury lamp irradiation than pure ZnO and SnO 2 analogues. A similar trend has also been observed by Zhang et al 58 for onedimensional ZnO-SnO 2 nanobers synthesized by a simple combination method of sol-gel process and electrospinning technique.…”