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河南省化学会2018年学术年会

作者： Xue-Qin Sun Qing-Chao Chang Wei-Hang Han Ji-Chao Wang Kai Jiang Yu-Ping Zhang College of Chemistry and Chemical Engineering Henan Institute of Science and Technology Post-doctoral Station of Environmental Science and Engineering Henan Normal University

With industrialization and rapid development of the society,human beings have to face the ever-increasing *** photocatalytic conversion,as an eco-friendly and economic technology,has received widely attention to solve the problem of fossil resource depletion and environmental pollution.A novel strategy is developed to photocatalytic water-splitting coupling with pollutant degradation using *** high-efficient and multi-functional photocatalyst is the key for the complex *** doped g-CNnanoribbons(Mn-CNNR)was synthesized by the two-step calcination method,and its morphology exhibited the nanoribbon sturcture.H and O yields(380.39 and 74.78μmol/g)of photocatalytic water-splitting using Mn-CNNR was 2.71 and 1.69 times higher than that using bulk g-CN(CNB)after visible-light illumination in pure ***,in the photocatalysis of water splitting coupling with mb degradation,the yields of H and O could reach 593.35 and59.47μmol/g with a 96.05%degradation efficiency of methylene blue(mb)after 3.0 h illumination and the Mn-CNNR catalyst still showed the good stability and the photocatalytic activity in 5 cycling *** on the theoretical simulation and measurements,the separation of photo-generated carriers was assuredly promoted by nanoribbon-construction and Mn *** on the experimental and simulated results,the formation of·OH from HO on the surface of Mn-CNNR was more favorable than that on the surface of CNB in thermodynamics,leading to the excellent performance of Mn-CNNR *** Mn doping,the process from HO to hydroxide radicals on the g-CN surface became beneficial in thermodynamics and ***,a photocatalytic mechanism was proposed to explain the detailed process of photocatalysis for water splitting coupling with mb *** present work shed light on the design of multi-functionalization photocatalysts to simultaneously tackle the problems of energy cri

关键词： Water Splitting mb degradation Mn Doping g-C3N4 Nanoribbon

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Comparison of discharge characteristics and methylene blue degradation through a direct-current excited plasma jet with air and oxygen used as working gases

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Plasma Science and Technology 2020年第5期22卷 126-133页

作者： Jiacun WU Kaiyue WU Chenhua REN Pengying JIA Xuechen LI College of Physics Science and Technology Hebei UniversityBaoding 071002People’s Republic of China

Through using a direct-current driven plasma jet operated underwater,degradation of methylene blue(mb)is investigated with air and oxygen used as working *** a low power voltage,a plasma plume extends from the needle electrode,which is purple in *** turns pink after it bridges the two *** the process,oxygen plasma remains *** operates in a pulsed mode or a continuous one,which depends on the magnitude of power *** the pulsed mode,oxygen discharge has a shorter plume and a higher pulse frequency than air discharge under the same power *** the same current of the continuous mode,both power and gap voltages of oxygen discharge are higher than those of air ***,mb degradation efficiency increases with increasing power voltage or initial concentration of mb *** with air discharge,oxygen discharge has a higher degradation efficiency with the same power voltage and treatment *** pulsed oxygen discharge with power voltage of about 6.5 k V has the highest efficiency in degrading mb dye,reaching approximately 85.8%after 10 min *** a comparison,after 10 min treatment in air discharge,the highest degradation efficiency is 63.7%,which appears in the continuous mode at a power voltage of 10.6 ***,optical spectra from the discharges are also compared for the two types of working gases.

关键词： plasma jet mb degradation pulsed mode continuous mode

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Green synthesis of magnetically separable and reusable Fe_(3)O_(4)/Cdots nanocomposites photocatalyst utilizing Moringa oleifera extract and watermelon peel for rapid dye degradation

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Carbon Resources Conversion 2023年第4期6卷 274-286页

作者： Emi Kurnia Sari Rivaldo Marsel Tumbelaka Harlina Ardiyanti Nurul Imani Istiqomah Chotimah Edi Suharyadi Department of Physics Universitas Gadjah MadaYogyakartaIndonesia Department of Physics Institut Teknologi SumateraLampungIndonesia

This study focused on green-synthesized magnetite/carbon dots nanocomposites(GS-Fe_(3)O_(4)/Cdots)utilizing Moringa oleifera leaf extract and watermelon peel waste for rapid degradation of methylene blue(mb)***-precipitation and hydrothermal method were used to synthesize GS-Fe_(3)O_(4) and Cdots,*** addition,the sonication method was used to link Cdots on Fe_(3)O_(4) surface.X-ray diffraction spectrum of GS-Fe_(3)O_(4)/Cdots inform the cubic inverse spinel and has crystallite size in the range of 10.1-7.2 *** crystallite size also decreased with the increase of Cdots *** transmission electron microscope showed the most uniform size of nanocomposites at around 13.4 *** functional group of Fe-O was detected on the nanocomposites,proof that Fe_(3)O_(4) still exists after *** presence of C=C,C-O,and C-O-C also indicates the existence of Cdots on the surface of Fe_(3)O_(4).The addition of Cdots affected the saturation magnetization and coercivity value in the range of 29.2-38.3 emu/g and 59-65 Oe,respectively,which showed a good magnetic *** an organic dye,mb was used for a photocatalytic process under UV *** degradation efficiency was raised to 98% for 30 min photocatalytic *** magnetically separable capability makes nanocomposites could be recycled and reused three times with high ***,GS-Fe_(3)O_(4)/Cdots potential as a low-cost and environmentally friendly reusable photocatalyst for rapid wastewater degradation.

关键词： Green synthesis Fe_(3)O_(4)nanoparticles Cdots Nanocomposite mb degradation

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