种具有蛋黄-蛋壳结构Pt@SiO2催化剂的制备方法

• Format: Patent
• Language: Chinese
• Published: 23.01.2018
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; ORGANIC CHEMISTRY; 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

本发明涉及Pt@SiO催化剂及其制备方法。具体地说是种具有蛋黄蛋壳结构，内核含有Pt纳米粒子和有机官能团的Pt@SiO纳米球。以介孔氧化硅小球作为内核，吸附Pt纳米粒子，在碱性条件下，加入有机硅烷偶联剂，搅拌，过滤，干燥，得到具有核-壳结构的氧化硅纳米球。纳米球内部的微环境可以是亲水，疏水，超疏水；Pt纳米粒子的担载量在0.1％-5％范围内可调；Pt纳米粒子的分布可以控制在内核上或空腔中。该方法步骤简单，用时短，纳米粒子的担载量和组成容易调节，制备的纳米球具有大的比表面积和孔容；颗粒粒度均、分散性好；得到的材料在环己烯氢化中表现出了良好的催化活性，且可以循环使用。 The invention relates to a Pt@SiO2 catalyst and a preparing method thereof, particularly a Pt@SiO2 nanosphere having a yolk-eggshell-type structure and having a core containing Pt nano particles and organic functional groups. A silica nanosphere having a core-shell structure is prepared by adopting a mesoporous silica sphere as an inner core and by adsorbing the Pt nano particles, adding an organosilane coupling agent under alkaline conditions, stirring, filtering and drying. The microenvironment in the nanosphere can be hydrophilic, hydrophobic and super-hydrophobic. The loading amount of the Pt nano particles is adjustable in a range of 0.1-5%. Distribution of the Pt nano particles can be controlled on the inner core or a cavi