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Colorimetric quantification of aqueous hydrogen peroxide in the DC plasma-liquid system

Plasma Science and Technology 2021年第5期23卷 111-116页

作者：俞仁泽刘钊源林娇何心怡刘林生熊青陈强欧思聪 Shenzhen Research Institute of Xiamen University Institute of Electromagnetics and AcousticsFujian Provincial Key Laboratory of Plasma and Magnetic ResonanceKey Laboratory of Electromagnetic Wave Science and Detection TechnologyXiamen UniversityXiamen 361005People’s Republic of China State key laboratory of Electrical Insulation and power equipment Centre for Plasma BiomedicineXi’an Jiaotong UniversityXi’an 710049People’s Republic of China College of electronic engineering Guangxi Normal UniversityGuilin 541004People’s Republic of China State key laboratory of power transmission equipment&System security and New Technology Chongqing UniversityChongqing 400044People’s Republic of China School of Chemistry and Physics Queensland University of TechnologyBrisbaneQLD 4000Australia

The quantification of hydrogen peroxide(H_(2)O_(2))generated in the plasma-liquid interactions is of great importance,since the H_(2)O_(2)species is vital for the applications of the plasma-liquid ***,we report on in situ quantification of the aqueous H_(2)O_(2)(H_(2)O_(2)aq)using a colorimetric method for the DC plasma-liquid systems with liquid as either a cathode or an *** results show that the H_(2)O_(2)aqyield is 8-12 times larger when the liquid acts as a cathode than when the liquid acts as an *** conversion rate of the gaseous OH radicals to H_(2)O_(2)aqis 4-6 times greater in the former ***,the concentrations of dissolved OH radicals for both liquid as cathode and anode are of the same order of tens of n M.

关键词： plasma-liquid interactions hydrogen peroxide OH radical atmospheric-pressure plasma

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Analysis of Non-Sinusoidal Steady Electric Field of ±500 kV Converter Transformer

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Energy and power Engineering 2017年第4期9卷 53-62页

作者： Gang Liu Cheng Chi Yanjiao Jin Yongqiang Ma Lipeng Sun Lin Li Youliang Sun hebei provincial key laboratory of power transmission equipment security Defense North China Electric Power Universi-ty Baoding China State key laboratory of Alternate Electrical power System with Renewable Energy Sources North China Electric Power University Beijing China Shandong power equipment Co. Ltd. Jinan China

The line side winding is under the fundamental frequency AC voltage, while the valve side winding contains not only fundamental AC voltage component, but also the DC voltage component, fundamental AC voltage component, and higher harmonic voltage components when the converter transformer is at its normal operating condition, and the electric field of converter transformer is a non-sinusoidal steady one. To analyze the non-sinusoidal steady electric field containing the DC component, fundamental AC and higher harmonic components, the voltage spectrum of the valve winding in a ±500 kV converter transformer is firstly analyzed, and the non-sinusoidal periodic steady electric field is obtained by the fast discrete Fourier transform. Different resistivity of the oil and oil-immersed paper is adopted to simulate the aging of oil paper insulation at operation, and get the non-sinusoidal steady electric field.

关键词： Converter Transformer AC-DC Hybrid Non-Sinusoidal Periodic Electric Field

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Towards high-power mid-IR light source tunable from 3.8 to 4.5 µm by HBr-filled hollow-core silica fibres

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Light(Science & Applications) 2022年第1期11卷 101-113页

作者： Zhiyue Zhou Zefeng Wang Wei Huang Yulong Cui Hao Li Meng Wang Xiaoming Xi Shoufei Gao Yingying Wang College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China State key laboratory of Pulsed power Laser Technology Changsha 410073China Hunan provincial key laboratory of High Energy Laser Technology Changsha 410073China Institute of Photonics Technology Jinan UniversityGuangzhou 511443China

Fibre lasers operating at the mid-IR have attracted enormous interest due to the plethora of applications in defence,security,medicine,and so ***,no continuous-wave(CW)fibre lasers beyond 4μm based on rare-earth-doped fibres have been demonstrated thus ***,we report efficient mid-IR laser emission from HBr-filled silica hollow-core fibres(HCFs)for the first *** pumping with a self-developed thulium-doped fibre amplifier seeded by several diode lasers over the range of 1940–1983 nm,narrow linewidth mid-IR emission from 3810 to 4496 nm has been achieved with a maximum laser power of about 500 mW and a slope efficiency of approximately 18%.To the best of our knowledge,the wavelength of 4496 nm with strong absorption in silica-based fibres is the longest emission wavelength from a CW fibre laser,and the span of 686 nm is also the largest tuning range achieved to date for any CW fibre *** further reducing the HCF transmission loss,increasing the pump power,improving the coupling efficiency,and optimizing the fibre length together with the pressure,the laser efficiency and output power are expected to increase *** work opens new opportunities for broadly tunable high-power mid-IR fibre lasers,especially beyond 4μm.

关键词： tunable power amplifier

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Super-hydrophobic film deposition by an atmospheric-pressure plasma process and its anti-icing characteristics

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Plasma Science and Technology 2019年第5期21卷 142-150页

作者：黄清华熊琳邓小龙舒展陈强包兵陈明礼熊青 State key laboratory of power transmission equipment&System security and New Technology Chongqing UniversityChongqing 400044People's Republic of China College of Aerospace Scie nee and En gineering National University of Defense TechnologyChangsha 410073People's Republic of China Fujian provincial key laboratory of Plasma and Magnetic Resonance Department of Electronic ScienceInstitute of Electromagnetics and AcousticsXiamen UniversityXiamen 361005People's Republic of China Chongqing Landscape and Gardening Research Institute Chongqing 401329People's Republic of China State Grid Longchang Electric power Supply Branch Longchang 642150People's Republic of China

In this work,the super-hydrophobic(SH)surface was prepared through chemical vapor deposition process by an argon atmospheric pressure plasma jet source with HMDSN(hexamethyldisilazane)as the polymerization *** synthesized organosilicon(SiOxCyHz)thin films with water contact angle over 160°and sliding angle below 5°,were able to be *** and XPS analysis indicates a large number of hydrocarbon compositions were polymerized in the thin films enduing the latter very-low surface free *** shows the SH films display micro-nanostructure and with high degree of averaged surface roughness 190 nm evaluated by AFM *** experiments under controlled low-temperature and moisture conditions,the prepared SH surface exhibits good anti-icing *** prolonging freezing time was achievable on the SH thin films for both static and sliding water *** investigation demonstrates the anti-icing potentials of SH surface prepared through low-cost simple atmospheric-pressure plasma polymerization process.

关键词： hydrophobicity anti-icing atmospheric-pressure plasma polymerization

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