Synthesis and characterization of zinc borophosphates with ANA-zeotype framework by the microwave method

• Zinc borophosphate zeolites with ANA-zeotype structures were prepared by microwave technique.
• The size of crystals could be controlled by tuning power.
• Synthesis period can be significantly reduced by raising reaction temperature.

Zinc borophosphate (NH4)16[Zn16B8P24O96] (denoted as ZnBP-ANA) with ANA-zeotype structure has been synthesized by employing microwave-assisted solvothermal synthesis in the reaction system ZnCl2∙6H2O-(NH4)2HPO4–H3BO3 using ethylene glycol as a co-solvent. The influences of various experimental parameters, such as reaction temperature, solvent ratio, zinc precursors and reactive power, have been systematically investigated. The products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA), and so on. Small and homogeneous ZnBP-ANA single crystal with regular cube morphology are crystallized by using microwave solvothermal synthesis method within a shorter time, and its grain size decreases with power.

Tailor-made ANA zeolites with varied size can be prepared by simply changing the reaction power.Figure optionsDownload as PowerPoint slide