纤维素/Ni_(x)Zn_(1-x)Fe_(2)O_(4)碳气凝胶纳米复合材料的制备及光Fenton性能研究

Study on preparation of cellulose/Ni_(x)Zn_(1-x)Fe_(2)O_(4)-CA nanocomposite and its photo-fenton performance

将Zn(NO_(3))_(2)·6H_(2)O,Fe(NO_(3))_(3)·9H_(2)O、Ni(NO_(3))_(2)·6H_(2)O按一定比例加入到纤维素水凝胶碱性基底中,经过冷冻干燥和高温碳化处理形成纤维素/Ni_(x)Zn_(1-x)Fe_(2)O_(4)碳气凝胶纳米复合材料(纤维素/Ni_(x)Zn_(1-x)Fe_(2)O_(4)-CA),研究样品对MB溶液的降解效果,得出纤维素/50%Ni_(0.3)Zn_(0.7)Fe_(2)O_(4)-CA-700℃具有较好的光降解性能,对其形貌结构、组成、光电化学性质进行表征,并对光降解环境进一步改性,调整pH,加入H_(2)O_(2)形成类芬顿体系,光降解速率提升至0.032min^(-1),并结合上述表征手段研究其光降解机理。

Adding Zn(NO_(3))_(2)·6H_(2)O,Fe(NO_(3))_(3)·9H_(2)O and Ni(NO_(3))_(2)·6H_(2)O in light of mole ratio into hydrogel alkaline substrate to synthesize cellulose/Ni_(x)Zn_(1-x)Fe_(2)O_(4),after freeze drying and different carbonized temperature to form cellulose/Ni_(x)Zn_(1-x)Fe_(2)O_(4)carbon aerogels nanocomposites(Cellulose/Ni_(x)Zn_(1-x)Fe_(2)O_(4)-CA).The photodegradation of the samples to MB solution was researched.It was concluded that cellulose/50%Ni_(0.3)Zn_(0.7)Fe_(2)O_(4)-CA-700℃had good photodegradation properties,and characterized the morphology,composition and photoelectric chemical properties.The photodegradation environment was further modified with adjusting pH and H_(2)O_(2)constructed photo-fenton system.The photodegradation rate was increased to 0.032min^(-1).The photodegradation mechanism was studied by combining the above characterization methods.