The catalyst of nanometer Ag supported on nanomter TiO 2 particles was synthesized by irradiating TiO 2 colloid containing AgNO 3 solution.Its properties were characterized by IR,TEM,XRD,and BET methods.The size of ca...The catalyst of nanometer Ag supported on nanomter TiO 2 particles was synthesized by irradiating TiO 2 colloid containing AgNO 3 solution.Its properties were characterized by IR,TEM,XRD,and BET methods.The size of catalyst particles was 12 1nm,composed by 95% TiO 2 and 5% Ag.The experimental results showed that the catalyst of nanometer Ag supported on nanometer TiO 2 improved obviously the activity and selectivity in the epoxidation of styrene.展开更多
As a rapid uniform and efficient heating method, microwave irradiation has been widely used in chemical reaction and preparing nanomaterials. Here Pt/carbon nanotube(CNT) catalysts with w(Pt)=18.1% and 9.4 % were rapi...As a rapid uniform and efficient heating method, microwave irradiation has been widely used in chemical reaction and preparing nanomaterials. Here Pt/carbon nanotube(CNT) catalysts with w(Pt)=18.1% and 9.4 % were rapidly synthesized by microwave irradiation heating polyol process and employing the ethylene glycol solution of H 2PtCl 6 as the precursors in the presence of CNT support. TEM imaging showed that microwave-prepared Pt nanoparticles were very uniform in size, with an average size of 3.1 nm, and uniformly dispersed on the CNT surface. Electrochemical experiments demonstrated that microwave-synthesized Pt/CNT catalysts exhibited a higher catalytic activity for electrooxidation of liquid methanol than E-TEK Pt/C. The significant improvement in catalyst performance derives from that microwave-synthesized Pt nanoparticles have a uniform small particle size and uniforml dispersion on the CNT surface.展开更多
文摘The catalyst of nanometer Ag supported on nanomter TiO 2 particles was synthesized by irradiating TiO 2 colloid containing AgNO 3 solution.Its properties were characterized by IR,TEM,XRD,and BET methods.The size of catalyst particles was 12 1nm,composed by 95% TiO 2 and 5% Ag.The experimental results showed that the catalyst of nanometer Ag supported on nanometer TiO 2 improved obviously the activity and selectivity in the epoxidation of styrene.
文摘As a rapid uniform and efficient heating method, microwave irradiation has been widely used in chemical reaction and preparing nanomaterials. Here Pt/carbon nanotube(CNT) catalysts with w(Pt)=18.1% and 9.4 % were rapidly synthesized by microwave irradiation heating polyol process and employing the ethylene glycol solution of H 2PtCl 6 as the precursors in the presence of CNT support. TEM imaging showed that microwave-prepared Pt nanoparticles were very uniform in size, with an average size of 3.1 nm, and uniformly dispersed on the CNT surface. Electrochemical experiments demonstrated that microwave-synthesized Pt/CNT catalysts exhibited a higher catalytic activity for electrooxidation of liquid methanol than E-TEK Pt/C. The significant improvement in catalyst performance derives from that microwave-synthesized Pt nanoparticles have a uniform small particle size and uniforml dispersion on the CNT surface.
基金supported by the National Basic Research Program of China ( 2015CB932304 and 2016YFA0202603)NSFC (91645104)+2 种基金Science and Technology Program of Guangzhou (201704030019)Natural Science Foundation of Guangdong Province (2016A010104004 and 2017A010103007)Guangdong Science and Technology Innovation Leading Talent Fund (2016TX03N187)
