To obtain a high-performance heterogeneous photo-catalyst, herein, the hetero-structured Zn In_(2)S_(4)-Ni O@MOF(ZNM) nano-sheets are designed and prepared by partial pyrolysis of nickel-based MOFs(NiMOF) combined wit...To obtain a high-performance heterogeneous photo-catalyst, herein, the hetero-structured Zn In_(2)S_(4)-Ni O@MOF(ZNM) nano-sheets are designed and prepared by partial pyrolysis of nickel-based MOFs(NiMOF) combined with the low-temperature solvo-thermal method. The results indicate that the NiO nanoparticles, produced by partial pyrolysis of the Ni-MOF, have a high density of the surface active sites with limited aggregation, which act as a co-catalyst to capture photo-induced charge carriers. In addition, the morphology and structure of Ni-MOF nano-sheets were preserved in ZNM, which is beneficial to the reduction of the conduction barrier for the photo generated electron-hole pairs. With the synergetic advantages of co-catalyst and unique two-dimensional hetero-structure, ZNM nano-sheets exhibited significantly improved activity for photo-catalytic hydrogen production.展开更多
The study was performed for removing ibuprofen from water using ozonation with visible light SrWO4/ZnO catalyst.For the removal of Ibuprofen,the overall reaction was carried out in a glass reactor in the presence of U...The study was performed for removing ibuprofen from water using ozonation with visible light SrWO4/ZnO catalyst.For the removal of Ibuprofen,the overall reaction was carried out in a glass reactor in the presence of UV light and constant supply of ozone.The maximum removal efficiency of Ibuprofen was 93%at 0.1 mg/L initial Ibuprofen concentration,and 0.35 g/L catalyst concentration keeping the contact time 30 min.After a certain value,an increase in a concentration of doping agent,catalyst as well as initial Ibuprofen concentration results in a decrease of efficiency of the process.The prepared photo catalysts were characterized by X-ray diffraction,FTIR spectra and SEM analysis.XRD peaks and FTIR spectra has clearly shown that the doping of SrWO4 with ZnO showed better result as compared to individual.SEM analysis showed that they spherical nano-composite crystals were dominant in character.BOD character was found to reduce after ozonation of solution.Various by products were formed and were identified through GC-MS analysis.From results,it was found that combination of SrWO4/ZnO was able to remove 93%of ibuprofen and 0.4%dopping of ZnO on SrWO4 was found to be sufficient.Degradation pattern of by products were identitified in GC-MS with various mass ratios as 177,92,57,44.Nearly 55%removal of BOD was observed in this study.This study was found to be useful for removal of pharmaceuticals and other similar pollutants from water effectively.展开更多
We demonstrate the fabrication of BiOCl/Bi_2S_3 which is well defined at a large scale. The BiOCl/Bi_2S_3 heterostructures exhibit an enhanced photo-catalytic degradation of methyl orange（MO） compared to BiOCl and B...We demonstrate the fabrication of BiOCl/Bi_2S_3 which is well defined at a large scale. The BiOCl/Bi_2S_3 heterostructures exhibit an enhanced photo-catalytic degradation of methyl orange（MO） compared to BiOCl and Bi_2S_3, attributed to the interface between Bi_2S_3 and BiOCl, which effectively separate the photo-induced electron-hole pairs and suppress their recombination.展开更多
罗丹明B是典型有机染料污染物,造成水体环境等的污染,对其进行降解研究对于水体保护具有重大现实意义。采用主题词在Web of Science数据库中检索到3946篇文献,利用VOSviewer软件,对检索到的文献进行关键词、作者、机构等要素共现分析并...罗丹明B是典型有机染料污染物,造成水体环境等的污染,对其进行降解研究对于水体保护具有重大现实意义。采用主题词在Web of Science数据库中检索到3946篇文献,利用VOSviewer软件,对检索到的文献进行关键词、作者、机构等要素共现分析并链接CNKI数据库的研究内容,构建学术知识图谱。对降解罗丹明B展开可视化分析,旨在揭示该领域的研究国家、研究机构、研究热点、核心研究领域与合作网络特征,为后续科研工作提供理论参考。分析结果表明,近十年内在降解罗丹明B领域内,中国是发文数量最多的国家,关键词聚类呈现多元研究格局,研究热点聚集在氯氧化铋、异质结结构、纳米材料、降解性能、TiO_(2)等方面,纳米材料与异质结的研究将成为今后更好的发展方向。展开更多
基金support of National Science Foundation of China (Nos.91963207 and 12075174)。
文摘To obtain a high-performance heterogeneous photo-catalyst, herein, the hetero-structured Zn In_(2)S_(4)-Ni O@MOF(ZNM) nano-sheets are designed and prepared by partial pyrolysis of nickel-based MOFs(NiMOF) combined with the low-temperature solvo-thermal method. The results indicate that the NiO nanoparticles, produced by partial pyrolysis of the Ni-MOF, have a high density of the surface active sites with limited aggregation, which act as a co-catalyst to capture photo-induced charge carriers. In addition, the morphology and structure of Ni-MOF nano-sheets were preserved in ZNM, which is beneficial to the reduction of the conduction barrier for the photo generated electron-hole pairs. With the synergetic advantages of co-catalyst and unique two-dimensional hetero-structure, ZNM nano-sheets exhibited significantly improved activity for photo-catalytic hydrogen production.
基金the Institutional Fund Projects under grant no.(IFPRC-078-135-2020)。
文摘The study was performed for removing ibuprofen from water using ozonation with visible light SrWO4/ZnO catalyst.For the removal of Ibuprofen,the overall reaction was carried out in a glass reactor in the presence of UV light and constant supply of ozone.The maximum removal efficiency of Ibuprofen was 93%at 0.1 mg/L initial Ibuprofen concentration,and 0.35 g/L catalyst concentration keeping the contact time 30 min.After a certain value,an increase in a concentration of doping agent,catalyst as well as initial Ibuprofen concentration results in a decrease of efficiency of the process.The prepared photo catalysts were characterized by X-ray diffraction,FTIR spectra and SEM analysis.XRD peaks and FTIR spectra has clearly shown that the doping of SrWO4 with ZnO showed better result as compared to individual.SEM analysis showed that they spherical nano-composite crystals were dominant in character.BOD character was found to reduce after ozonation of solution.Various by products were formed and were identified through GC-MS analysis.From results,it was found that combination of SrWO4/ZnO was able to remove 93%of ibuprofen and 0.4%dopping of ZnO on SrWO4 was found to be sufficient.Degradation pattern of by products were identitified in GC-MS with various mass ratios as 177,92,57,44.Nearly 55%removal of BOD was observed in this study.This study was found to be useful for removal of pharmaceuticals and other similar pollutants from water effectively.
基金supported by the National Natural Science Foundation of China (21371023)the National Key Basic Research Program of China (2015CB251100)
文摘We demonstrate the fabrication of BiOCl/Bi_2S_3 which is well defined at a large scale. The BiOCl/Bi_2S_3 heterostructures exhibit an enhanced photo-catalytic degradation of methyl orange（MO） compared to BiOCl and Bi_2S_3, attributed to the interface between Bi_2S_3 and BiOCl, which effectively separate the photo-induced electron-hole pairs and suppress their recombination.
文摘罗丹明B是典型有机染料污染物,造成水体环境等的污染,对其进行降解研究对于水体保护具有重大现实意义。采用主题词在Web of Science数据库中检索到3946篇文献,利用VOSviewer软件,对检索到的文献进行关键词、作者、机构等要素共现分析并链接CNKI数据库的研究内容,构建学术知识图谱。对降解罗丹明B展开可视化分析,旨在揭示该领域的研究国家、研究机构、研究热点、核心研究领域与合作网络特征,为后续科研工作提供理论参考。分析结果表明,近十年内在降解罗丹明B领域内,中国是发文数量最多的国家,关键词聚类呈现多元研究格局,研究热点聚集在氯氧化铋、异质结结构、纳米材料、降解性能、TiO_(2)等方面,纳米材料与异质结的研究将成为今后更好的发展方向。
