【摘要】 通过简单的高温工艺合成了金属掺杂（Cu、Mg、Al、Ca）g-C₃N₄,再将一维材料纳米纤维素（CNF-C）插入二维材料g-C₃N₄中，采用真空辅助抽滤法制备得到光催化复合膜，通过XRD、SEM、FT-IR、UV-Vis DRS对所制备的g-C₃N₄/CNF-C复合膜的微观结构、化学组成和理化性质进行表征。结果表明，金属掺杂光催化剂的可见光催化活性得到改善，有利于污染物降解，减少了带隙，延长了可见光吸收；掺杂Cu的g-C₃N₄制备的复合膜对罗丹明B染料的降解表现出最高的光催化性能，7 h降解率达42.6%;掺杂Mg的g-C₃N₄的复合膜水通量约为未掺杂g-C₃N₄的3倍，达到了918.63 L/（h·m²·bar）。更多还原

【Abstract】 Metal-doped（Cu, Mg, Al, Ca） g-C₃N₄ is synthesized via a simple high-temperature process, and then one-dimensional nanofibrillar cellulose（CNF-C） is inserted into two-dimensional g-C₃N₄,and finally photocatalytic composite membranes are prepared through vacuum-assisted filtration method.XRD,SEM,FT-IR,and UV-Vis DRS are employed to systematically characterize the microstructure, chemical composition and physicochemical properties of the designed g-C₃N₄/CNF-C composite membrane.Results show that the visible photocatalytic activity of the metal-doped photocatalyst is improved, which favoring pollutant degradation, reducing the band gap and prolonging the visible light absorption.In particular, Cu-doped g-C₃N₄ composite membrane shows the highest photocatalytic performance for the degradation of Rhodamine B dye, delivering a degradation rate of 42.6% in 7 h.The water flux of Mg-doped g-C₃N₄ composite membrane is around three times that of the undoped g-C₃N₄,which reaches 918.63 L·h^-1·m^-2·bar^-1.更多还原