Adsorption properties of ZrO2 hollow microboxes prepared using CaCO3 cubes as templates

作者：Zhu, Weixue; Ge, Shengsong^*; Shao, Qian

来源：RSC Advances, 2016, 6(85): 81736-81743.

DOI：10.1039/c6ra11639f

• CONGO RED
• DYE REMOVAL
• NANOCRYSTALLINE ZIRCONIA
• COMPOSITE
• WATER
• MICROSPHERES
• ADSORBENT
• POLLUTANTS
• SPHERE
• ORANGE

Zirconia hollow microboxes were prepared using calcium carbonate cubes as templates. The as-prepared products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nitrogen adsorption-desorption isotherms. Adsorption performance of the as-prepared products toward Congo red (CR) aqueous solutions was tested and discussed. Results show that ZrO2 hollow microboxes copied the morphology of the CaCO3 template very well with a diameter of similar to 1.5 mu m and a possible formation mechanism was proposed according to the observed results. The Langmuir surface area and BET specific surface area of ZrO2 hollow microboxes before calcination are 301.65 m(2) g(-1), 247.88 m(2) g(-1), respectively and the maximum adsorbance was found to be 188.02 mg g(-1) which is much higher than that of ZrO2 hollow microboxes after calcination (90.86 mg g(-1)) and ZrO2 nanoparticles (57.86 mg g(-1)). The adsorption kinetics and isotherms can be well described by the pseudo-second order rate model and Langmuir equation, respectively. These results indicate that ZrO2 hollow microboxes before calcination have great potential in removing dyes from a water environment.

• 出版日期2016
• 单位山东科技大学