The high-efficient degrading ability of Fe BC amorphous ribbons toward acid orange 7(AO7)via redox reactions is reported and compared with that of Fe PC amorphous ribbons.The time required for degrading50%of AO7 using...The high-efficient degrading ability of Fe BC amorphous ribbons toward acid orange 7(AO7)via redox reactions is reported and compared with that of Fe PC amorphous ribbons.The time required for degrading50%of AO7 using Fe BC amorphous ribbons is only 1/3 of that using Fe PC amorphous ribbons.In the Fe BC amorphous matrix,galvanic cell structures are formed between the Fe-B and Fe-C bonds because of the large difference in their bonding strengths,which contributes to the low reaction activation energy and the high degrading efficiency of Fe BC amorphous ribbons.The extremely long service life of Fe BC amorphous ribbons comes from the progressive formation of 3 D porous nanosheet networks that allow more efficient mass transport and a larger specific surface area.The Fe BC amorphous ribbons show a satisfying degrading ability in not only acidic but also neutral and weak alkaline AO7 solutions.This work provides an effective and environmental-friendly material for degrading azo dyes.展开更多
目的:了解某一批次聚对苯二甲酸乙二醇酯(polyethylene terephthalate,PET)瓶装无气天然矿泉水产生异味的缘由。方法:首先采用膜过滤结合平板菌落计数法分离和计数污染菌,16S r RNA序列分析鉴定其为假单胞菌属(Pseudomonas spp.),再采...目的:了解某一批次聚对苯二甲酸乙二醇酯(polyethylene terephthalate,PET)瓶装无气天然矿泉水产生异味的缘由。方法:首先采用膜过滤结合平板菌落计数法分离和计数污染菌,16S r RNA序列分析鉴定其为假单胞菌属(Pseudomonas spp.),再采用假单胞菌属特异性rpo B引物进行梯度聚合酶链式反应优化扩增条件,产物进行测序和序列分析将污染菌鉴定到种。结果:这批产品的主要污染菌是一种2009年从南极分离鉴定的假单胞菌属新种P.extremaustralis。反接实验证实该菌能在天然矿泉水中生长繁殖,并产生刺激性异味。结论:P.extremaustralis部分细菌能够透过两级串联0.2μm过滤器,耐受中、低压紫外杀菌工艺,耐低温和低氧压,能在无任何添加的PET瓶装无气天然矿泉水中生长并产生异味。展开更多
基金financially supported by the National Natural Science Foundation of China(Nos.51631003 and 51871054)the Natural Science Foundation of Jiangsu Province of China(Grant No.BK20191269)+1 种基金This research used beam line 13-IDD in the Advanced Photon Source(APS)of USAAPS is supported by the Department of Energy(DOE)office of Science(DE-AC02-06CH11357).
文摘The high-efficient degrading ability of Fe BC amorphous ribbons toward acid orange 7(AO7)via redox reactions is reported and compared with that of Fe PC amorphous ribbons.The time required for degrading50%of AO7 using Fe BC amorphous ribbons is only 1/3 of that using Fe PC amorphous ribbons.In the Fe BC amorphous matrix,galvanic cell structures are formed between the Fe-B and Fe-C bonds because of the large difference in their bonding strengths,which contributes to the low reaction activation energy and the high degrading efficiency of Fe BC amorphous ribbons.The extremely long service life of Fe BC amorphous ribbons comes from the progressive formation of 3 D porous nanosheet networks that allow more efficient mass transport and a larger specific surface area.The Fe BC amorphous ribbons show a satisfying degrading ability in not only acidic but also neutral and weak alkaline AO7 solutions.This work provides an effective and environmental-friendly material for degrading azo dyes.