基于泡沫铜的多孔碳均匀负载Cu3P纳米颗粒的制备及其光催化降解染料性能北大核心CSCD

为了开发活性高、易回收的光催化剂,采用多步热解法制备了基于泡沫铜的多孔碳均匀负载Cu_(3)P纳米颗粒。在泡沫铜(FC)基底原位生长铜基金属-有机框架晶态材料(Cu-MOF),通过热解处理使得泡沫铜表面覆盖了均匀负载于碳材料的Cu_(2)O/Cu纳米颗粒(Cu_(2)O/Cu@NPC@FC-400)。对该材料进行磷化处理得到目标光催化剂Cu_(3)P@NPC@FC-400。利用X射线粉末衍射(XRD)、傅里叶变换红外光谱(FT-IR)、紫外-可见漫散射光谱(UV-Vis DRS)、X射线光电子能谱(XPS)和扫描电子显微镜(SEM)等表征材料的组成和形貌。以罗丹明B(Rh B)溶液作为模拟废水,探究其光催化性能及机理。结果发现,Cu_(3)P@NPC@FC-400材料对罗丹明B染料具有良好的光催化性能,在3 h内染料去除率可达94%。该材料便于回收,循环利用10次后,光催化活性保持不变。此外,该材料对于含有7种染料的复杂体系也具有优异的光降解性能。该催化剂具有稳定性高、回收简便的优势,可用于处理含有多种染料的废水。

Preparation of Uniformly Loaded Cu3P Nanoparticles in Porous Carbon Based on Copper Foam and Their Photocatalytic Performance for Dye Degradation

To develop the photocatalyst with high activity and easy recyclability， uniformly loaded Cu₃P NPs in N-doped porous carbon （NPC） supported by foamy copper （FC） was synthesized through a multi-step calcination method. FC was modified by in-situ growth of copper-based metal-organic framework （Cu-MOF） crystals， which was further calcinated to obtain Cu₂O/Cu NPs loaded NPC on the surface of FC （Cu₂O/Cu@NPC@FC-400）. The desired photocatalyst Cu₃P@NPC@FC-400 can be achieved after phosphate treatment. The composition and morphology of the obtained material were characterized by X-ray powder diffraction （PXRD）， infrared spectroscopy （IR）， ultraviolet-visible diffuse reflectance spectroscopy （UV-Vis DRS）， X-ray photoelectron spectroscopy （XPS） and scanning electron microscopy （SEM）. The photocatalytic performance of Cu₃P@NPC@FC-400 was studied in the simulated dye wastewater of Rhodamine B （Rh B）， and the degradation mechanism was explored as well. It is found that the catalyst exhibits good photocatalytic activity for Rh B with a high dye removal up to 94% within 3 h. The photocatalyst is convenient for recovery， and its activity remains after 10 runs. Moreover， Cu₃P@NPC@FC-400 shows excellent photodegradation performance for multi-component wastewater containing 7 dyes. The photocatalyst has the advantage of good stability and easy recovery， which can be used for treating wastewater of various dyes.