Method for preparing nano-composite photocatalyst with P-N homojunction structure

• Main Authors: YA JING, YANG NINGNING
• Format: Patent
• Language: Chinese; English
• Published: 15.06.2016
• 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 discloses a method for preparing a nano-composite photocatalyst with a P-N homojunction structure. The method comprises the following steps of firstly putting treated Cu-TiO2 nano-powder having different Cu/Ti molar percents and TiO2 nano-powder in oleic acid according to different mass percents to conduct ultrasonic dispersion at normal temperature; and then, drying and grinding the mixed powder to obtain the nano-composite TiO2/Cu-TiO2 photocatalytic material with a P-N homojunction structure. The nano-composite photocatalytic material prepared by utilizing the method has a large specific surface area, good dispersibility and a large visible light response range. The degradation efficiency of the TiO2/Cu-TiO2 nano-composite photocatalytic material with a P-N homojunction structure for methylene blue 3h under a visible light is more than 90 percent. The method is simple in process flow and easy to implement, has low comprehensive cost, and does not generate secondary hazards. 本发明公开种具同质P-N结结构纳米复