以Co(Ⅱ)为模板,通过邻苯二腈在SnO2纳米颗粒表面直接原位合成酞菁钴(Co(Ⅱ)Pc)/SnO2纳米复合材料,并采用XRD、TG-DTA、UV-V is和FT-IR等测试技术对合成产物进行了表征,同时对材料进行了可见光光催化反应实验。实验结果表明,采用原位合...以Co(Ⅱ)为模板,通过邻苯二腈在SnO2纳米颗粒表面直接原位合成酞菁钴(Co(Ⅱ)Pc)/SnO2纳米复合材料,并采用XRD、TG-DTA、UV-V is和FT-IR等测试技术对合成产物进行了表征,同时对材料进行了可见光光催化反应实验。实验结果表明,采用原位合成方法能够在SnO2纳米表面上原位生成Co(Ⅱ)Pc,在可见光照射下,复合材料首先由CoPc吸收可见光,激发电子通过Co—O键注入至纳米SnO2导带,并与O2气作用形成超氧自由基,在150 m in内使罗丹明B的可见光降解率达87.1%,且其催化活性经10次循环使用,稳定性较好。展开更多
Cobalt Phthalocyanine/Iron (CoPc/Fe) nanocomposite particles were prepared using mehods of organic inorganic composite in situ with cobalt phthalocyanine(CoPc) and carbonyl iron. The structure of composite particles w...Cobalt Phthalocyanine/Iron (CoPc/Fe) nanocomposite particles were prepared using mehods of organic inorganic composite in situ with cobalt phthalocyanine(CoPc) and carbonyl iron. The structure of composite particles was characterized by density measurement, XRD, SEM and TEM. The results show that CoPc/Fe nanocomposites with density of 3.99 g· cm－ 3 were almost micro sized regular spheroids consisting ofα Fe nanoparticles with average diameter 20 nm in inner and CoPc layer on the surface of spheroids. Further, microwave electromagnetic parameters of CoPc/Fe nanocomposite particles was measured, and the dependences ofε r andμ r on frequency were investigated. Compared with carbonyl iron powders, the composite permittivityε r significantly decreases while composite permabilityμ r changes slightly, which may increases the width of microwave absorbing frequency.展开更多
金属酞菁(MePcs)因其易得性和结构可调性被认为是一种很有前途的CO_(2)减排催化剂。其中,酞菁钴(CoPc)基杂化材料用于电催化CO_(2)还原(CO_(2)-RR)近年来受到了广泛关注。通过制备简便的2-甲基咪唑锌盐MOF材料为前驱体,N_(2)气氛下热解...金属酞菁(MePcs)因其易得性和结构可调性被认为是一种很有前途的CO_(2)减排催化剂。其中,酞菁钴(CoPc)基杂化材料用于电催化CO_(2)还原(CO_(2)-RR)近年来受到了广泛关注。通过制备简便的2-甲基咪唑锌盐MOF材料为前驱体,N_(2)气氛下热解后的N-C作为载体,在DMF的超声作用下与CoPc混合制备CoPc/N-C。在三电极体系下,0.1 mol/L KHCO_(3)电解液中,CoPc/N-C表现出较好的CO_(2)电催化还原为CO的性能,过电位低至190 mV,在电位-0.7~-1 V vs RHE电势区间表现出较高的CO法拉第效率(>85%)且具有较好的稳定性,其优异的电催化CO_(2)还原性能主要归因于复合材料中CoPc与N-C载体之间的协同作用。展开更多
文摘以Co(Ⅱ)为模板,通过邻苯二腈在SnO2纳米颗粒表面直接原位合成酞菁钴(Co(Ⅱ)Pc)/SnO2纳米复合材料,并采用XRD、TG-DTA、UV-V is和FT-IR等测试技术对合成产物进行了表征,同时对材料进行了可见光光催化反应实验。实验结果表明,采用原位合成方法能够在SnO2纳米表面上原位生成Co(Ⅱ)Pc,在可见光照射下,复合材料首先由CoPc吸收可见光,激发电子通过Co—O键注入至纳米SnO2导带,并与O2气作用形成超氧自由基,在150 m in内使罗丹明B的可见光降解率达87.1%,且其催化活性经10次循环使用,稳定性较好。
文摘Cobalt Phthalocyanine/Iron (CoPc/Fe) nanocomposite particles were prepared using mehods of organic inorganic composite in situ with cobalt phthalocyanine(CoPc) and carbonyl iron. The structure of composite particles was characterized by density measurement, XRD, SEM and TEM. The results show that CoPc/Fe nanocomposites with density of 3.99 g· cm－ 3 were almost micro sized regular spheroids consisting ofα Fe nanoparticles with average diameter 20 nm in inner and CoPc layer on the surface of spheroids. Further, microwave electromagnetic parameters of CoPc/Fe nanocomposite particles was measured, and the dependences ofε r andμ r on frequency were investigated. Compared with carbonyl iron powders, the composite permittivityε r significantly decreases while composite permabilityμ r changes slightly, which may increases the width of microwave absorbing frequency.
文摘金属酞菁(MePcs)因其易得性和结构可调性被认为是一种很有前途的CO_(2)减排催化剂。其中,酞菁钴(CoPc)基杂化材料用于电催化CO_(2)还原(CO_(2)-RR)近年来受到了广泛关注。通过制备简便的2-甲基咪唑锌盐MOF材料为前驱体,N_(2)气氛下热解后的N-C作为载体,在DMF的超声作用下与CoPc混合制备CoPc/N-C。在三电极体系下,0.1 mol/L KHCO_(3)电解液中,CoPc/N-C表现出较好的CO_(2)电催化还原为CO的性能,过电位低至190 mV,在电位-0.7~-1 V vs RHE电势区间表现出较高的CO法拉第效率(>85%)且具有较好的稳定性,其优异的电催化CO_(2)还原性能主要归因于复合材料中CoPc与N-C载体之间的协同作用。
