Method for preparing ternary composite photocatalyst by combining supercritical water/supercritical organic matters

• Main Authors: QIAN ZHENGFANG, LI JUYING, HUANG XIAOTONG, DING TENGDA, GAO XIAOZHONG, PAN WEIJIE, QIAN YIGUANG, ZHANG YUECHAO, CHENG YANAN
• Format: Patent
• Language: Chinese; English
• Published: 09.02.2021
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a method for preparing a ternary composite photocatalyst by combining supercritical water/supercritical organic matters, and relates to the technical field of photocatalyst preparation. The method comprises the following steps: firstly, preparing g-C3N4 with a porous structure by utilizing supercritical hydrothermal polycondensation; carrying out supercritical hydrothermalsynthesis on the obtained g-C3N4 and a metal salt aqueous solution to obtain a g-C3N4 composite material with metal oxide deposited on the surface; and finally, reducing the noble metal salt by usinga supercritical organic matter to further obtain the metal oxide/g-C3N4 with highly dispersed noble metal elementary substances deposited on the surface, thereby finally obtaining the noble metal/metal oxide/g-C3N4 ternary catalyst. The different advantages of supercritical water and supercritical organic matter in the aspect of material preparation are fully utilized and completed in the same closed kettle body, and the m