为了提升大豆蛋白废水厌氧发酵产气性能,通过批式实验探究纳米Fe3O4(Fe3O4nanoparticles,Fe3O4NPs)对模拟大豆蛋白废水厌氧发酵产甲烷的影响,并采用2种不同模型对发酵过程中累积甲烷产量进行动力学分析。结果表明,添加适量的Fe3O4NPs有...为了提升大豆蛋白废水厌氧发酵产气性能,通过批式实验探究纳米Fe3O4(Fe3O4nanoparticles,Fe3O4NPs)对模拟大豆蛋白废水厌氧发酵产甲烷的影响,并采用2种不同模型对发酵过程中累积甲烷产量进行动力学分析。结果表明,添加适量的Fe3O4NPs有助于提高大豆蛋白废水厌氧发酵产气量和有机物去除率,促进产甲烷过程。质量浓度为300 mg/L时,累积产气量达到652.12 m L,比对照组提高23.51%,平均甲烷含量为81.63%;可溶性化学需氧量(soluble chemical oxygen demand,SCOD)、生化需氧量(biochemical oxygen demand,BOD5)和蛋白质去除率均最高,分别为89.11%、91.91%和71.52%,甲烷产率达到331.40 m L/g SCOD;添加Fe3O4NPs可以降低厌氧发酵过程中氨氮和总氮浓度。Transference模型和改进的Gompertz模型均可较好地拟合大豆蛋白废水厌氧发酵产甲烷过程,前者拟合度更高(R2>0.96),且Fe3O4NPs质量浓度为300 mg/L时获得的最大甲烷产率为350.84 m L/g SCOD。展开更多
Since the catalytic activity of most nanozymes is still far lower than the corresponding natural enzymes,there is urgent need to discover novel highly efficient enzyme-like materials.In this work,Co_(3)V_(2)O_(8)with ...Since the catalytic activity of most nanozymes is still far lower than the corresponding natural enzymes,there is urgent need to discover novel highly efficient enzyme-like materials.In this work,Co_(3)V_(2)O_(8)with hollow hexagonal prismatic pencil structures were prepared as novel artificial enzyme mimics.They were then decorated by photo-depositing Ag nanoparticles(Ag NPs)on the surface to further improve its catalytic activities.The Ag NPs decorated Co_(3)V_(2)O_(8)(ACVPs)showed both excellent oxidase-and peroxidase-like catalytic activities.They can oxidize the colorless 3,3’,5,5’-tetramethylbenzidine rapidly to induce a blue change.The enhanced enzyme mimetic activities can be attributed to the surface plasma resonance(SPR)effect of Ag NPs as well as the synergistic catalytic effect between Ag NPs and Co_(3)V_(2)O_(8),accelerating electron transfer and promoting the catalytic process.ACVPs were applied in constructing a colorimetric sensor,validating the occurrence of the Fenton reaction,and disinfection,presenting favorable catalytic performance.The enzyme-like catalytic mechanism was studied,indicating the chief role of⋅O_(2)-radicals in the catalytic process.This work not only discovers a novel functional material with double enzyme mimetic activity but also provides a new insight into exploiting artificial enzyme mimics with highly efficient catalytic ability.展开更多
基金supported by the National Natural Science Foundation of China(51602297)Fundamental Research Funds for the Central Universities(201612007)+1 种基金Postdoctoral Innovation Program of Shandong Province(201603043)the Major Research Project of Shandong Province(2016ZDJS11A04)
文摘为了提升大豆蛋白废水厌氧发酵产气性能,通过批式实验探究纳米Fe3O4(Fe3O4nanoparticles,Fe3O4NPs)对模拟大豆蛋白废水厌氧发酵产甲烷的影响,并采用2种不同模型对发酵过程中累积甲烷产量进行动力学分析。结果表明,添加适量的Fe3O4NPs有助于提高大豆蛋白废水厌氧发酵产气量和有机物去除率,促进产甲烷过程。质量浓度为300 mg/L时,累积产气量达到652.12 m L,比对照组提高23.51%,平均甲烷含量为81.63%;可溶性化学需氧量(soluble chemical oxygen demand,SCOD)、生化需氧量(biochemical oxygen demand,BOD5)和蛋白质去除率均最高,分别为89.11%、91.91%和71.52%,甲烷产率达到331.40 m L/g SCOD;添加Fe3O4NPs可以降低厌氧发酵过程中氨氮和总氮浓度。Transference模型和改进的Gompertz模型均可较好地拟合大豆蛋白废水厌氧发酵产甲烷过程,前者拟合度更高(R2>0.96),且Fe3O4NPs质量浓度为300 mg/L时获得的最大甲烷产率为350.84 m L/g SCOD。
基金supported by National Natural Science Foundation of China(52208272,41706080 and 51702328)the Basic Scientific Fund for National Public Research Institutes of China(2020S02 and 2019Y03)+3 种基金the Basic Frontier Science Research Program of Chinese Academy of Sciences(ZDBS-LY-DQC025)the Young Elite Scientists Sponsorship Program by CAST(No.YESS20210201)the Strategic Leading Science&Technology Program of the Chinese Academy of Sciences(XDA13040403)the Key Research and Development Program of Shandong Province(Major Scientific and Technological Innovation Project)(2019JZZY020711).
文摘Since the catalytic activity of most nanozymes is still far lower than the corresponding natural enzymes,there is urgent need to discover novel highly efficient enzyme-like materials.In this work,Co_(3)V_(2)O_(8)with hollow hexagonal prismatic pencil structures were prepared as novel artificial enzyme mimics.They were then decorated by photo-depositing Ag nanoparticles(Ag NPs)on the surface to further improve its catalytic activities.The Ag NPs decorated Co_(3)V_(2)O_(8)(ACVPs)showed both excellent oxidase-and peroxidase-like catalytic activities.They can oxidize the colorless 3,3’,5,5’-tetramethylbenzidine rapidly to induce a blue change.The enhanced enzyme mimetic activities can be attributed to the surface plasma resonance(SPR)effect of Ag NPs as well as the synergistic catalytic effect between Ag NPs and Co_(3)V_(2)O_(8),accelerating electron transfer and promoting the catalytic process.ACVPs were applied in constructing a colorimetric sensor,validating the occurrence of the Fenton reaction,and disinfection,presenting favorable catalytic performance.The enzyme-like catalytic mechanism was studied,indicating the chief role of⋅O_(2)-radicals in the catalytic process.This work not only discovers a novel functional material with double enzyme mimetic activity but also provides a new insight into exploiting artificial enzyme mimics with highly efficient catalytic ability.
