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Scaling Inhibitor Impact to Corrosion Resistance of J55 mild Steel in CO2 saturated brine

IOP Conference Series: Earth and Environmental Science 2021年第2期714卷

作者： Qingbo Zhang Xiaowei Xu Xueping Hua Jianyong Lei Yun Ma Qingsong Yu xinjiang Vocational University Urumqi Xinjiiang 830000 China No.2 Gas Production Plant Changqing Oilfield Company Yulin Shaanxi 710200 China College of Petroleum Engineering Shaanxi Province Key Laboratory of Advanced Stimulation Technology for Oil & Gas Reservoirs Xi'an Shiyou University Xi'an Shaanxi 710065 China Engineering Research Center of Development and Management for Low to UltraLow Permea-bility Oil & Gas Reservoirs in West China Ministry of Education Xi'an Shaanxi 710065 China Center for Surface Science and Plasma Technology Department of Mechanical and Aerospace Engineering University of Missouri Columbia Missouri 65211 USA

The corrosion behavior of the J55 mild steel alloy in CO2 saturated brine have been studied by weight loss technique, potentiodynamic polarization technique and characterization of the corroded surface techniques. The results demonstrate that the corrosion solution is easy to penetrate into the matrix and activate corrosion without scale inhibitor. When the scale inhibitor content was as high as 30 mg/L, the effect of scaling products on corrosion gradually decreased. Adding the corresponding scale inhibitor in the solution was beneficial to slow down the corrosion rate and the possibility of pitting corrosion. The corrosion product film is mainly FeCO3, and with the increase of scale inhibitor contents, the density of FeCO3 was stronger and compact, which could greatly prevent the contact between the medium and the matrix..

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Fluorine-Containing Passivation Layer via surface Chelation for Inorganic Perovskite Solar Cells

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Angewandte Chemie 2022年第6期135卷

作者： Hao Zhang Prof. Wanchun Xiang Xuejiao Zuo Xiaojing Gu Shiang Zhang Yachao Du Zhiteng Wang Yali Liu Haifeng Wu Peijun Wang Qingyue Cui Hang Su Prof. Qingwen Tian Prof. Shengzhong (Frank) Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University No. 620 West Chang'an Avenue Xi'an 710119 P. R. China Contribution: Data curation (lead) Formal analysis (lead) Investigation (lead) Writing - original draft (supporting) Contribution: Conceptualization (lead) Data curation (lead) Writing - original draft (lead) Contribution: Formal analysis (supporting) Investigation (supporting) Contribution: Data curation (supporting) Formal analysis (equal) Investigation (equal) Contribution: Data curation (supporting) Investigation (supporting) Contribution: Data curation (supporting) Formal analysis (supporting) State Key Laboratory of Organic-Inorganic Composites Key Lab of Biomedical Materials of Natural Macromolecules Ministry of Education Beijing Laboratory of Biomedical Materials Beijing University of Chemical Technology No. 15 East Road North Third Ring Chaoyang District Beijing 100029 P. R. China Contribution: Conceptualization (lead) Data curation (lead) Funding acquisition (lead) Project administration (lead) Supervision (lead) Validation (lead) Visualization (lead) Writing - review & editing (lead) Dalian National Laboratory for Clean Energy iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences No. 457 Zhongshan Road Dalian Liaoning 116023 P. R. China Contribution: Project administration (lead) Supervision (lead) Validation (lead) Writing - review & editing (equal)

Minimizing surface defect is vital to further improve power conversion efficiency (PCE) and stability of inorganic perovskite solar cells (PSCs). Herein, we designed a passivator trifluoroacetamidine (TFA) to suppress CsPbI 3− x Br x film defects. The amidine group of TFA can strongly chelate onto the perovskite surface to suppress the iodide vacancy, strengthened by additional hydrogen bonds. Moreover, three fluorine atoms allow strong intermolecular connection via intermolecular hydrogen bonds, thus constructing a robust shield against moisture. The TFA-treated PSCs exhibit remarkably suppressed recombination, yielding the record PCEs of 21.35 % and 17.21 % for 0.09 cm 2 and 1.0 cm 2 device areas, both of which are the highest for all-inorganic PSCs so far. The device also achieves a PCE of 39.78 % under indoor illumination, the highest for all-inorganic indoor photovoltaic devices. Furthermore, TFA greatly improves device ambient stability by preserving 93 % of the initial PCE after 960 h.

关键词： Chelation Defect Passivation Inorganic Perovskite Solar Cells

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BN/SiC Coating on SiC Tows Prepared by Chemical Vapor Infiltration

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IOP Conference Series: Materials Science and engineering 2019年第1期678卷

作者： Zhe Qi Xiaoxu Lv Wenqing Zhao Shizhen Zhu Jian Jiao National Key Laboratory of Advanced Composites AECC Beijing Institute of Aeronautical Materials Beijing 100095 China Surface Engineering Division AECC Beijing Institute of Aeronautical Materials Beijing 100095 China School of Materials Science and Engineering Beijing Institute of Technology Beijing 100082 China

Boron nitride (BN) and silicon carbide (SiC) coatings were prepared in sequence on desized SiC tows by chemical vapor infiltration (CVI) at the temperature of 950°C. BN was synthesized by the reaction between boron trichloride (BCl3) and ammonia (NH3) while SiC was from the thermal decomposition of methyl trichlorosilane (MTS). The thickness of the coatings was uniform on a certain cross section of a monofilament, and the thickest/thinnest ratio is less than ~2 across the whole SiC tows for both SiC and BN coatings, as observed by scanning electron microscopy (SEM). Distinct β-SiC powder X-ray diffraction (XRD) pattern was obtained for as-prepared CVI SiC while as-prepared BN coating only showed a bump and a tiny peak corresponding to hexagonal BN (h-BN). This result was verified by transmission electron microscopy (TEM) images, in which CVI BN only had curved diffraction fringes within small pockets, known as turbostractic structures(t-BN). However, t-BN possesses similar short-range structure to h-BN as demonstrated by 11B solid-state NMR spectrum. SiCf/SiC minicomposites using the interphase coating mentioned above is currently under investigation.

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The microstructure and mechanical properties of silicon carbide fibers with boron nitride interphase

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IOP Conference Series: Materials Science and engineering 2019年第1期678卷

作者： Xiaoxu Lv Zhe Qi Zhuoyu Jiang Yiran Zhou Wenqing Zhao Jian Jiao National Key Laboratory of Advanced Composites AECC Beijing Institute of Aeronautical Materials Beijing 100095 China Surface Engineering Division AECC Beijing Institute of Aeronautical Materials Beijing 100095 China School of Materials Science and Engineering Beijing Institute of Technology Beijing 100082 China

The 2nd generation SiC tows is a type of essentially polycrystalline fibers (SiC1.46O0.03). Smooth and uniform boron nitride interphase was deposited on SiC fibers by low pressure chemical vapor infiltration (CVI). The scanning electron microscopy(SEM) was used to characterize the microstructure of the BN interphase and fibers while X-ray diffraction(XRD) and TEM were used to characterize the phase constitute of the fibers. The XRD and TEM results showed that the BN interphase prepared by CVI is turbostratic. The effects of thickness on the mechanical properties of SiC fibers were investigated by using two-parameter Weibull distribution. The fibers with thin BN interphase showed higher strength than the as-received fibers, for healing the surface flaws. However, the soft nature of increasing BN thickness had a more dominant effect and resulted in the decrease of fiber strength.

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Pyrenesulfonic Acid Sodium Salt for Effective Bottom-surface Passivation to Attain High Performance of Perovskite Solar Cells

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Solar RRL 2021年第10期5卷

作者： Lili Gao Hang Su Zhuo Xu Yingjie Hu Jing Zhang Shengzhong (Frank) Liu Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Normal University Xi'an Shaanxi 710119 China Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Normal University Xi'an Shaanxi 710119 China Shaanxi Engineering Lab for Advanced Energy Technology Shaanxi Normal University Xi'an Shaanxi 710119 China Institute for Adv. Energy Mater. Shaanxi Normal University Xi'an Shaanxi 710119 China School of Materials Science and Engineering Shaanxi Normal University Xi'an Shaanxi 710119 China Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian Liaoning 116023 China iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian Liaoning 116023 China

In perovskite solar cells, not only defects on the top perovskite film surface seriously affect device performance, those buried in the bottom perovskite–electron-transfer layer (ETL) interface damage carrier extraction, transport, and device efficiency as well. Herein, a novel double-sided passivation strategy is designed using a single π-conjugation-induced 1-pyrenesulfonic acid sodium salt (PyNa + ). It is found that it effectively passivates top and bottom interface defects to render high device performance. The π-conjugated pyrene-containing sodium salt electronically contributes to the surface band edges and influences the carrier dynamics by passivating defects at both top hole-transfer layer (HTL)–perovskite and bottom perovskite–ETL interfaces. The density functional theory (DFT) calculation confirms that the Pb cluster and I—Pb antisite defects can be effectively passivated by the O···Pb coordination and electrostatic interaction of PyNa + . The carrier lifetimes are prolonged, the interface defect density is effectively reduced as measured by space-charge-limited current (SCLC). Through the double layer passivation of PyNa + , the device delivers improved power conversion efficiencies of 21.22% relative to that of a reference perovskite, and enhanced stability with 85% of original efficiency after 1440 h in atmospheric environment. Double-sided passivation provides a comprehensive strategy for high-performance perovskite solar cells.

关键词： bottom surface high efficiencies passivation perovskite solar cells pyrenesulfonic acid sodium salt

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Synergistically Enhanced Amplified Spontaneous Emission by Cd Doping and Cl-Assisted Crystallization

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advanced Optical Materials 2020年第4期9卷

作者： Lu Zhang Jialun Wen Xiaodong Ren Shengye Jin Shengzhong Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China State Key Laboratory of Molecular Reaction Dynamics iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian Liaoning 116023 China University of the Chinese Academy of Sciences Beijing 100039 China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Normal University Xi'an 710119 China Dalian National Laboratory for Clean Energy iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian Liaoning 116023 China

Organic−inorganic hybrid halide perovskite materials have recently been recognized as a promising optical gain medium, and the development of optically pumped amplified spontaneous emission (ASE) of perovskite materials with low threshold and high optical gain will be on the only way to go for realizing its commercial perovskite laser. In this work, enhanced-performance ASE with lower threshold and higher optical gain is obtained in CdCl 2 passivated FA 0.9 MA 0.15 Cs 0.3 PbI 2.7 Br 0.3 (FAMACs) polycrystalline films coated with poly methyl methacrylate (PMMA) layer. The ASE threshold of the FAMACs polycrystalline films with CdCl 2 is significantly reduced from 18.7 to 7.9 µ J cm −2 , with an enhanced ASE output intensity and stability. The improved ASE performance can be attributed to the synergistic effect of Cd ion doping and Cl-ion-assisted crystallization in the FAMACs polycrystalline films, exhibiting remarkably enhanced photoluminescence, a prolonged decay lifetime and a low defect density, and thus leading to easily achieve the population inversion due to the reduction of nonradiative recombination of carriers in the optical gain medium.

关键词： amplified spontaneous emission, ASE threshold CdCl2 perovskite films

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Amorphous Mo-Ta oxide nanotubes for long-term stable Mo oxide based supercapacitors

arXiv

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arXiv 2020年

作者： Jin, Bowen Hejazi, Seyedsina Pyczak, Florian Oehring, Michael Mohajernia, Shiva Kment, Stepan Tomanec, Ondrej Zboril, Radek Truong Nguyen, Nhat Yang, Min Schmuki, Patrik MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin150001 China Department of Materials Science Institute for Surface Science and Corrosion WW4-LKO University of Erlangen-Nuremberg Martensstraße 7 ErlangenD-91058 Germany Helmholtz-Zentrum Geesthacht Zentrum für Material- und Küstenforschung GmbH Max-Planck-Straße 1 Geesthacht21502 Germany Regional Centre of Advanced Technologies and Materials Palacky University Olomouc 17. Listopadu 50A Olomouc772 07 Czech Republic Department of Chemistry King Abdulaziz University Jeddah Saudi Arabia

With a large-scale usage of portable electric appliances, a high demand for increasingly high density energy storage devices has emerged. MoO3 has, in principle, a large potential as negative electrode material in supercapacitive devices, due to high charge densities that can be obtained from its reversible redox reactions. Nevertheless, the extremely poor electrochemical stability of MoO3 in aqueous electrolytes prevents a practical use in high capacitance devices. In this work, we describe how to overcome this severe stability issue by forming amorphous molybdenum oxide/tantalum oxide nanotubes by anodic oxidation of a Mo-Ta alloy. The presence of a critical amount of Ta-oxide (> 20 at-%) prevents the electrochemical decay of the MoO3 phase and thus yields an extremely high stability. Due to the protection provided by tantalum oxide, no capacitance losses are measureable after 10000 charging/discharging cycles. Copyright © 2020, The Authors. All rights reserved.

关键词： Tantalum oxides

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Direct observation of heavy quasiparticles in the Kondo-lattice compound CeIn3

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Physical Review B 2018年第4期97卷 045128-045128页

作者： Yun Zhang Wei Feng Xia Lou Tianlun Yu Xiegang Zhu Shiyong Tan Bingkai Yuan Yi Liu Haiyan Lu Donghua Xie Qin Liu Wen Zhang Xuebing Luo Yaobo Huang Lizhu Luo Zhengjun Zhang Xinchun Lai Qiuyun Chen Science and Technology on Surface Physics and Chemistry Laboratory Mianyang 621907 China Department of Engineering Physics Tsinghua University Beijing 100084 China State Key Laboratory of Surface Physics and Department of Physics Fudan University Shanghai 200433 China Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201204 China Key Laboratory of Advanced Materials School of Materials Science and Engineering Tsinghua University Beijing 100084 China

The electronic structure of the Kondo lattice CeIn3 has been studied by on-resonant angle-resolved photoemission spectroscopy and scanning tunneling microscopy/spectroscopy. A weakly dispersive quasiparticle band has been observed directly with an energy dispersion of 4 meV by photoemission, implying the existence of weak hybridization between the f electrons and conduction electrons. The hybridization is further confirmed by the formation of the hybridization gap revealed by temperature-dependent scanning tunneling spectroscopy. Moreover, we find the hybridization strength in CeIn3 is much weaker than that in the more two-dimensional compounds CeCoIn5 and CeIrIn5. Our results may be essential for the complete microscopic understanding of this important compound and the related heavy-fermion systems.

关键词： Electronic structure Magnetism Angle-resolved photoemission spectroscopy

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Preliminary Study on the Magnetohydrodynamic(MHD) Angular Rate Sensor Combing Coriolis Effect at Low-frequency 3

Preliminary Study on the Magnetohydrodynamic(MHD) Angular Ra...

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2017 IEEE 第3届信息技术与机电一体化工程国际学术会议(ITOEC 2017)

作者： Yue Ji Xingfei Li Tengfei Wu Jun Wu Key Laboratory of Advanced Electrical Engineering and Energy Technology Tianjin Polytechnic University State Key Laboratory of Precision Measuring Technology and Instruments Tianjin University College of Aeronautical Automation Civil Aviation University of China

The poor performance of MHD ARS at low frequency has depressed its accuracy and application range.A preliminary study on the magnetohydrodynamic(MHD) angular rate sensor combing Coriolis effect(C-MHD

ISBN: (纸本)9781509053643;9781509053636

The poor performance of MHD ARS at low frequency has depressed its accuracy and application range.A preliminary study on the magnetohydrodynamic(MHD) angular rate sensor combing Coriolis effect(C-MHD

关键词： angular measurement error analysis magnetic field measurement magnetic sensors magnetohydrodynamics pumps magnetohydrodynamics Error analysis Angle measurement Coriolis effect Magnetic field measurement Magnetic sensors Pumps low frequencies Action Request System rate sensor ANGULAR VELOCITY combed Sensors

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3D-2D-0D Interface Profiling for Record Efficiency CsPbBrI2 Perovskite Solar Cells

3D-2D-0D Interface Profiling for Record Efficiency CsPbBrI2 ...

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2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC)

作者： Jingru Zhang Zhiwen Jin Shengzhong Frank Liu Key Laboratory of Applied Surface and Colloid Chemistry National Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science & Engineering Shaanxi Normal University Xi’an P. R. China

ISBN: (纸本)9781538685303;9781538685297

All-inorganic CsPbBrI 2 perovskite has great advantages in terms of ambient phase stability and suitable band gap (1.91 eV) for photovoltaic applications. However, the typical used structure causes reduced device performance because of the large recombination at the interface between the perovskite and the hole-extraction layer (HEL).In this paper, we report an efficient CsPbBrI 2 perovskite solar cell (PSC) with a dimensiongraded heterojunction, in which the CsPbBrI 2 material is distributed within a bulk-nanosheet-quantum dots or 3D-2D-0D dimension-profiled interface structure so that the energy alignment is optimized in between the valence and conduction bands of both CsPbBrI 2 and the HEL layers.

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