Method of preparing novel bismuth tungstate (Bi2WO6) photocatalytic material with dark state adsorptive property through microwave hydrothermal process

• Main Authors: TAN GUOQIANG, HUANG JING
• Format: Patent
• Language: Chinese; English
• Published: 24.04.2013
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention provides a method of preparing a bismuth tungstate (Bi2WO6) photocatalytic material with a dark state adsorptive property through a microwave hydrothermal process. The method comprises the following steps of: step 1: weighing and placing a Bi source and a W source into a beaker according to the molar ratio of Bi to W of 2 to 1, placing NaN3, N2H4.H2O and NH4Cl into the beaker according to the molar ratio of 3 to 1 to 1, and adding deionized water into the beaker to prepare into a mixed solution; magnetically stirring to uniformly mix raw materials at room temperature, and ultrasonically oscillating to obtain a precursor solution of the microwave hydrothermal process; transferring the precursor solution obtained in the step 2 into a reaction kettle of a polytetrafluoroethylene inner lining, and carrying out the microwave hydrothermal process; and after the reaction temperature is reduced to the room temperature, washing precipitates to be neutral with deionized water and anhydrous ethanol, and dr