Nanoiridium/nanotitania-nanogold/nanotitania composite microsphere, preparation method and application of composite microsphere used as photocatalyst

• Main Authors: Wang Xiaofei, Sun Xiaoming, Liu Junfeng, Liu Zhiying
• Format: Patent
• Language: Chinese; English
• Published: 03.08.2016
• 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 nanoiridium/nanotitania-nanogold/nanotitania composite microsphere, which has a porous structure with average pore size being 3.8-5.5 nm and with specific surface area being 216-317 m /g. mass ratio of nanoiridium to nanogold to nanotitania is (0.5-15): (0.5-15): 200. The invention also discloses a preparation method of the composite microsphere and an application of the composite microsphere used as a photocatalyst. As the nanoiridium/nanotitania-nanogold/nanotitania composite microsphere has large specific surface area, special porous structure and low photoelectron recombination rate, a photocatalytic reaction is easier to happen on the surface of a catalyst. 本发明公开了种纳米铱/纳米二氧化钛?纳米金/纳米二氧化钛复合微球，其具有多孔结构，平均孔径为3.8?5.5nm，比表面积为216?317m/g；其中纳米铱、纳米金、纳米二氧化钛的质量比为(0.5?15):(0.5?15):200。本发明还公开了其制备方法以及作为光催化剂的用途。本发明的纳米铱/纳米二氧化钛?纳米金/纳米二氧化钛复合微球比表面积大、具有特殊的孔结构且光生电子复合率较低，使光催化反应在催化剂表面更易发生。