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Tetracycline removal by a magnetic heterojunction Cu_(2)O/CoFe_(2)O_(4) activating peroxymonosulfate

Rare Metals 2023年第3期42卷 862-874页

作者： Xiao-Qing Li Shan Feng Jun Yang Tai-Ping Xie Jian-Kang Wang Xiao-Jing Chen De-Shun Kong Hou-Yang Chen Department of Chemical Engineering Chongqing Chemical Industry Vocational CollegeChongqing 401228China State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing 400044China Chongqing Key Laboratory of Environmental Materials and Remediation Technologies College of Chemical and Environmental EngineeringChongqing University of Arts and SciencesYongchuan 402160China School of Materials Science and Engineering Yangtze Normal UniversityChongqing 408100China School of Mining and Civil Engineering Liupanshui Normal UniversityLiupanshui 553004China Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China

The electron transfer mechanism in the process of peroxymonosulfate(PMS)activation using heterojunction catalyst was *** this work,magnetic heterojunction Cu_(2)O/CoFe_(2)O_(4)(CC)was first synthesized to activate *** innovative reaction mechanism based on built-in electric field-driven electron migration from Cu2O to CoFe2O4 and effective magnetic moment of CC for enhancing PMS activation was ***,the CC/PMS system was used for efficient removal of antibiotic tetracycline(TC).Under optimal conditions,98.0%TC could be removed using CC/PMS catalytic system after only 30 *** catalytic activity was higher than that of Cu_(2)O/PMS and CoFe_(2)O_(4)/***,the impact of solution pH on TC removal was insignificant,suggesting the pH-insensitive PMS activation ability of ***,the coexisting inorganic ions in the environment,such as HCO_(3)-,H_(2)PO4-,NO_(3)-,Cl-and humic acid(HA)as representative of natural organic matter,did not inhibit TC removal in CC/PMS ***,CC/PMS system exhibited excellent reusability with more than94.0%TC removal after the 5th *** paramagnetic resonance(EPR)tests and quenching experiments showed that O_(2)·-and 1O_(2) played vital roles in TC *** intermediate products and corresponding toxicity assessment revealed that this catalytic system could reduce TC *** work provided new insights into the PMS activation mechanism using heterogeneous magnetic catalysts,including transition metal oxide.

关键词： Peroxymonosulfate(PMS)activation heterojunction catalyst Electron migration Cu2O CoFe204

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Rapidly and mildly transferring anatase phase of graphene-activated TiO2 to rutile with elevated Schottky barrier:Facilitating interfacial hot electron injection for Vis-NIR driven photocatalysis

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Nano Research 2022年第12期15卷 10142-10147页

作者： Weiyao Hu Qiyuan Li Dong Xu Guangyao Zhai Shinan Zhang Dong Li Xiaoxiao He Jinping Jia Jiesheng Chen Xinhao Li School of Chemistry and Chemical Engineering Environmental Science and Engineeringand Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghai200240China State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai200241China

Visible and even infrared(IR)light-initiated hot electrons of graphene(Gr)catalysts are a promising driven power for green,safe,and sustainable H2O2 synthesis and organic synthesis without the limitation of bandgap-dominated narrow light absorption to visible light confronted by conventional ***,the life time of photogenerated hot electrons is too short to be efficiently used for various photocatalytic ***,we proposed a straightforward method to prolong the lifetime of photogenerated hot electrons from graphene by tuning the Schottky barrier at Gr/rutile interface to facilitate the hot electron *** rational design of Gr-coated TiO2 heterojunctions with interface synergy-induced decrease in the formation energy of the rutile phase makes the phase transfer of TiO2 support proceed smoothly and rapidly via ball *** optimized Gr/rutile dyad could provide a H2O2 yield of 1.05 mM·g-1·h-1 under visible light irradiation(λ≥400 nm),which is 30 times of the state-of-the-art noble-metal-free titanium oxide-based photocatalyst,and even achieves a H2O2 yield of 0.39 mM·g-1·h-1 on photoexcitation by near-infrared-region light(~800 nm).

关键词： hot electrons phase transition Schottky barrier heterojunction catalyst visible-near infrared ray(Vis-NIR)driven photocatalysis

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Nickel(hydro)oxide/graphdiyne catalysts for Efficient Oxygen Production Reaction

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Chemical Research in Chinese Universities 2021年第6期37卷 1268-1274页

作者： LUAN Xiaoyu XUE Yurui Science Center for Material Creation and Energy Conversion School of Chemistry and Chemical EngineeringInstitute of Frontier and Interdisciplinary ScienceShandong UniversityJinan250100P.R.China

The transition metal-based materials have been regarded as promising electrocatalysts for oxygen evolution reaction(OER).However,achieving higher efficiency is largely limited by the valence states of metal ***,different graphdiyne(GDY)-nickel composites were designed and synthesized[Ni(OH)_(2)/GDY,NiOOH/GDY,and NiO_(x)/GDY]as the electrocatalysts for *** NiO_(x)/GDY possessing the mixed valence states can drive the OER more efficiently than Ni(OH)_(2)/GDY and NiOOH/***_(x)/GDY gives the smallest overpotential of 310 mV at 10 mA/cm^(2) for OER,which is even superior to commercial RuO_(2)*** results reveal that not only the fast charge transfer induced by GDY but also the prominent roles of mixed Ni^(2+)/Ni^(3+) valence states boost the OER electrocatalytic *** presence of the mixed valence state was demonstrated to be helpful for the charge transfer,resulting in the enhancement of the catalytic *** work may provide a new direction to design and fabricate high-performance materials for OER and beyond.

关键词： Graphdiyne Carbon material heterojunction catalyst Oxygen evolution reaction Water splitting

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