Data on SEM and TEM of controllable construction of ZnWO₄ nanostructure with enhanced performance for photosensitized Cr(VI) reduction

Abstract

The data presented in this article are related to the research article entitled “Controllable construction of ZnWO₄ nanostructure with enhanced performance for photosensitized Cr(VI) reduction”[1] published in Applied Surface Science. The data of SEM/TEM given in this manuscript shown the effect of the hydrothermal time on the morphology of zinc tungstate samples. The photocatalytic degradation activity of methyl orange (MO) over ZnWO₄ nanorods obtained after 14 h hydrothermal process was investigated.

Specifications Table

Subject area	Chemistry
More specific subject area	Catalysis
Type of data	Figures
How data was acquired	SEM (Hitachi, SU8220); TEM (TECNAI, G2F20); Photocatalytic degradation activity of methyl orange (Shimadzu, UV-2600).
Data format	Raw, analyzed.
Experimental factors	hydrothermal time
Experimental features	Morphology and photocatalytic property
Data source location	Guangzhou, Guangdong, China.
Data accessibility	Data included in this article
Related research article	H. B. He, Z. Z. Luo, Z.-Y. Tang, C. L. Yu, Controllable Construction of ZnWO4Nanostructure with Enhanced Performance for Photosensitized Cr(VI) Reduction “in press”[1].

Value of the Data •These data provide a facile hydrothermal method to obtain ZnWO4 nanoparticles/nanorods with excellent photosensitized Cr6+ reduction properties. •Regulating hydrothermal time is a feasible way to control the morphology of nanostructured ZnWO4 materials. •These data could be applied to control morphology of other tungstate compounds.

1. Data

The data displayed in this manuscript include that giving the effect of hydrothermal time on the morphology of the nanostructured ZnWO₄ materials. Fig. 1 illustrates nanoparticle and nanorod morphologies obtained by hydrothermal process with various effective durations. Fig. 2 gives the MO's photocatalytic degradation property of the ZnWO₄-T14 obtained after 14 h hydrothermal process.

Fig. 1.

SEM images of the samples: (a) ZnWO₄-T0, (b) ZnWO₄-T5, (c) ZnWO₄-T10, and (d) ZnWO₄-T14; (e) TEM image of ZnWO₄-T14.

Fig. 2.

(a) The photocatalytic performance of ZnWO₄-T14 for MO degradation; (b) UV–vis absorption spectra of MO with different reaction times over ZnWO₄-T14.

2. Experimental design, materials, and methods

Experimental details are provided in reference [1]. Briefly, ammonium ZnCl and Na₂WO₄·2H₂O were added to deionized water under stirring, and the resulting suspensions were put into a sealed Teflon-lined autoclave and maintained at 180 °C for appropriate times. To understand the effect of the hydrothermal time on the morphology of the ZnWO₄ materials, Precursor suspensions were undergone hydrothermal process for 0 h, 5 h, 10 h, and 14 h, respectively. Which denoted ZnWO₄-T0, ZnWO₄-T5, ZnWO₄-T10, and ZnWO₄-T14, respectively. Fig. 1 gives the morphologies of the obtained samples. Which can be seen that the zinc tungstate nanoparticles gradually become nanorods by self-assembly with the prolongation of hydrothermal time.

The MO's photocatalytic degradation property of the ZnWO₄-T14 at 400 W metal halide lamp irradiation is shown in Fig. 2. After 45 min irradiation, only 8.5% of MO (20 mg/L) is degraded under the absence of ZnWO₄-T14. When adding 30 mg ZnWO₄-T14 to 30 mL MO solution, the degradation rate of MO reaches 73.6% after 45 min irradiation.

Conflict of interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.