基于上述理论结果,试图为CO2RR制备Al掺杂的Cu催化剂。首先,采用湿化学法制备了双氢氧化物纳米片(CuAl-LDH)。然后将前驱体在空气中退火以形成预催化剂。在CO2RR条件下,通过气体扩散电极(GDE)对材料进行原位重构得到最终的Cu基催化剂,分别表示为Al-Cu/Cu2O和Cu/Cu2O。 SEM和TEM图像显示,Al-Cu/Cu2O具有致密的网络...
阻燃作用本文介绍了Cu-Al LDH的制备与表征,研究了Cu/Al类水滑石对PVC的热稳定作用,阻燃及抑烟作用.结果表明,Cu-Al类水滑石在T≤200°C时对PVC有很好的热稳定性和抑烟性;Cu-Al类水滑石在T≥200°C时加速PVC热解及C化;残C的C含量高,具有多孔结构,具有石墨结构;对从PVC废弃物制备C材料有一定意义.张书华...
最近,中国科学院理化技术研究所张铁锐课题组利用富电子Cu来修饰LDH用于光催化固氮,大大提高了其光催化活性。相关研究成果发表在《Advanced Energy Materials》期刊上。 本文要点: (1)富电子的不饱和3d过渡金属物种可作为光催化反应的活性位点或助剂。 (2)铜的掺杂使得ZnAl-LDH中产生氧空位以及衍生的不饱和富电子Cud+...
The formation of stable aqueous colloidal suspensions of Cu-Al layered double hydroxide (LDH) assisted by double-hydrophilic block copolymers was investigated. It was of utmost importance since the direct preparation LDH colloids of controlled size is still a major challenge; moreover, regarding the ...
采用球磨-水热法合成不同投料摩尔比的Zn-Cu-Al层状水滑石(LDHs),LDHs前驱体经焙烧后转变为Zn-Cu-Al复合金属氧化物.用XRD,SEM,TG,DTA和BET等方法对样品前驱体及焙烧产物进行表征.在模拟太阳光照下,以甲基橙(MO)溶液为目标降解...
pyrano[3,2‐c]pyrazoleγ‐Fe2O3@Cu3Al‐LDH‐TUD nanoparticleThiourea dioxide was immobilized on 纬-Fe 2 O 3 @Cu 3 Al-LDH magnetic nanoparticles to prepare the 纬-Fe 2 O 3 @Cu 3 Al-LDH-TUD MNPs. The structure and properties of these magnetic nanoparticles were established by FT-IR,...
在能源和环境的双重压力下,常温常压下利用太阳能光催化分解水制氢,并进一步光催化氢化还原二氧化碳制备碳氢燃料被认为是具有潜力的未来能源技术之一,相应的高效催化剂材料的设计,制备及其光催化转化过程研究是该技术的关键.层状双羟基复合金属氢氧化物(Layered Double Hydroxides,LDHs)为阴离子层状化合物,其层间结构可提供...
A Molecular Dynamics Study of Cu Segregation to the Σ11 % MathType!MTEF!2!1!+- % feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqr1ngB % PrgifHhDYfgasaacH8srps0lbbf9q8WrFfeuY-Hhbbf9v8qqaqFr0x % c9pk0xbba9q8WqFfea0-...
All solids, dried at 100 °C, showed XRD patterns typical of hydrotalcite, where Me cations isomorphically replaced some Mg 2+ cations within the layers, thus forming a ternary LDH, as the starting material. The materials were calcined at 550 °C and tested as catalysts in the gas-phase ...