The Fenton reaction has been widely used in the environmental remediation.However,the sharp decline of photo-Fenton catalysts activity under neutral conditions is still an urgent problem to be solved.This study report...The Fenton reaction has been widely used in the environmental remediation.However,the sharp decline of photo-Fenton catalysts activity under neutral conditions is still an urgent problem to be solved.This study reports a Co/Fe bimetallic oxide quantum dots-coupled g-C_(3)N_(4)nanosheets(CoFeO QDs/g-C_(3)N_(4) NSs) composites with efficient degradation of organic pollutants under neutral conditions.Under the photo-Fenton condition,rhodamine B(RhB) degradation efficiency reached 98.32% within 90min for CoFeO QDs/g-C_(3)N_(4) NSs composites.The formed heterojunction between CoFeO QDs and g-C_(3)N_(4) NSs achieves enhanced charge transfer and efficient charge separation.Co-Fe bimetals make g-C_(3)N_(4) NSs easier to excite the production of·OH by H_(2)O_(2),achieving excellent degradation efficiency and cycle stability for organic pollutants in a wide pH range.Therefore,CoFeO QDs/g-C_(3)N_(4)NSs composites can be used as efficient and stable photoFenton catalysts to degrade organic contaminants in practical applications.展开更多
The emergence of vegetable oil as a promising alternative lubricant in the tribological application space has fueled research for making these oils as useful as mineral oils.Tribological modification of vegetable oil ...The emergence of vegetable oil as a promising alternative lubricant in the tribological application space has fueled research for making these oils as useful as mineral oils.Tribological modification of vegetable oil by the addition of TiO_(2)/gC_(3)N_(4)nanocomposite(as a nanoadditive)was studied here.The dispersion of the nanoadditive in the vegetable oil showed good oil dispersion stability without the addition of any surfactant.The tribological studies were conducted in a four-ball tester using ASTM standard D5183.In addition,the effect of temperature on tribological performance was also studied to understand the oxidation behavior of vegetable oil.The results showed a significant improvement in friction and wear properties of the optimized nano-oil.The mechanism behind the improvement in friction and wear properties is annotated in this paper.展开更多
基金financially supported by the National Natural Science Foundation of China (Nos.51872173 and 11874240)Taishan Scholars Program of Shandong Province (No. tsqn201812068)+1 种基金the Natural Science Foundation of Shandong Province (No.ZR2022JQ21)the Higher School Youth Innovation Team of Shandong Province (No.2019KJA013)。
文摘The Fenton reaction has been widely used in the environmental remediation.However,the sharp decline of photo-Fenton catalysts activity under neutral conditions is still an urgent problem to be solved.This study reports a Co/Fe bimetallic oxide quantum dots-coupled g-C_(3)N_(4)nanosheets(CoFeO QDs/g-C_(3)N_(4) NSs) composites with efficient degradation of organic pollutants under neutral conditions.Under the photo-Fenton condition,rhodamine B(RhB) degradation efficiency reached 98.32% within 90min for CoFeO QDs/g-C_(3)N_(4) NSs composites.The formed heterojunction between CoFeO QDs and g-C_(3)N_(4) NSs achieves enhanced charge transfer and efficient charge separation.Co-Fe bimetals make g-C_(3)N_(4) NSs easier to excite the production of·OH by H_(2)O_(2),achieving excellent degradation efficiency and cycle stability for organic pollutants in a wide pH range.Therefore,CoFeO QDs/g-C_(3)N_(4)NSs composites can be used as efficient and stable photoFenton catalysts to degrade organic contaminants in practical applications.
基金The authors thank the Department of Science and Technology(DST)for the financial support to establish Nano Functional Materials Technology Centre(NFMTC)through SR/NM/NAT/02-2005 projectAlso,we would like to thank IIT Madras,Chennai,India.The SEM and Optical profilometry imaging have been carried out in Department of Metallurgical&Materials Engineering,IIT Madras.
文摘The emergence of vegetable oil as a promising alternative lubricant in the tribological application space has fueled research for making these oils as useful as mineral oils.Tribological modification of vegetable oil by the addition of TiO_(2)/gC_(3)N_(4)nanocomposite(as a nanoadditive)was studied here.The dispersion of the nanoadditive in the vegetable oil showed good oil dispersion stability without the addition of any surfactant.The tribological studies were conducted in a four-ball tester using ASTM standard D5183.In addition,the effect of temperature on tribological performance was also studied to understand the oxidation behavior of vegetable oil.The results showed a significant improvement in friction and wear properties of the optimized nano-oil.The mechanism behind the improvement in friction and wear properties is annotated in this paper.
