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

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.

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.

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.

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.