中国海洋大学学报（自然科学版）2025，Vol.55Issue(6)：102-111,10.DOI:10.16441/j.cnki.hdxb.20240125
还原氧化石墨烯负载纳米金催化还原4-硝基苯酚的性能研究
Immobilization of Nanogold on Reduced Graphene Oxide and the Catalytic Reduction of 4-Nitrophenol
摘要
Abstract
In this work,reduced graphene oxide/carboxymethyl chitosan/nanogold(rGO/CMC/AuNPs)composites were synthesized using carboxymethyl chitosan(CMC)as the reducing and stabilis-ing agent.The structures of the rGO/CMC/AuNPs composites were characterized by X-ray photoelec-tron spectroscopy(XPS),X-ray diffraction(XRD),field-emission scanning electron microscopy(FESEM-EDS),high-resolution transmission electron microscopy(HRTEM)and Fourier transform in-frared spectroscopy(FT-IR).The catalytic reduction of 4-nitrophenol(4-NP)by the complexes was in-vestigated when NaBH4 was used as the hydrogen donor.The results showed that rGO with a C/O ratio of 3.97 was obtained by using CMC with a substitution degree of 0.665 as the reducing agent.rGO/CMC/AuNPs composites showed that spherical or quasi-spherical AuNPs were uniformly distributed on the surface of rGO.rGO/CMC/AuNPs composites showed high catalytic activity for the catalytic reduc-tion reaction of 4-NP.The average particle size of AuNPs in rGO/CMC/AuNPs composites,which pre-pared by CMC with a substitution degree of 0.456,was(54.7±13.3)nm.And when it was used as catalyst,the conversion of 4-NP could reach 98.1％at 30 ℃ for 30 min,the reaction rate constant could be up to 0.152 0 min-1,and the activation energy of the reaction Ea was 31.2 kJ·mol-1.关键词
还原氧化石墨烯/纳米金/羧甲基壳聚糖/催化性能/4-硝基苯酚Key words
reduced graphene oxide/nanogold/carboxymethyl chitosan/catalytic performance/4-ni-trophenol分类
化学化工引用本文复制引用
李欢欢,李瑾,王鹏飞,钟莲..还原氧化石墨烯负载纳米金催化还原4-硝基苯酚的性能研究[J].中国海洋大学学报（自然科学版）,2025,55(6):102-111,10.基金项目
山东省自然科学基金项目(ZR2021ME153) （ZR2021ME153）
国家自然科学基金项目(41106067)资助 Supported by the Shandong Provincial Natural Science Foundation(ZR2021ME153) （41106067）
the National Natural Science Foundation of China(41106067) （41106067）
