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SSRN 2024年

作者： Xu, Shipeng Zheng, Yuehong Zhan, Faqi La, Peiqing State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou730050 China Gansu Key Laboratory of Solar Power System Engineering Jiuquan Vocational and Technical College Jiuquan735000 China

The study focused on the impact of Si-doped Ni-Al coating on resistance to chloride molten salt corrosion. The results show that Si doping has an important effect on the formation of the oxide layer after the pre-oxidation and corrosion of the Ni-Al coating. When the Si content reaches 1.2 at.%, the thickest alumina layer can be formed, effectively impeding Cr diffusion. This is primarily attributed to silicon's ability to facilitate alumina formation, particularly enabling the transition from metastable alumina to stable alumina. The Ni-Al coating without Si doping exhibits a thinner oxide layer compared to the Si-doped Ni-Al coating. When Si content is elevated, it can hinder the development of a continuous protective layer during pre-oxidation or leads to some Cr elements being present in the alumina layer, resulting in spinel phase formation such as MgCr2O4 when corroded. The Ni-Al coatings with different Si content were corroded in NaCl/MgCl2/KCl (24.5:55.0:20.5, wt.%) mixed molten salts at 800 °C for 100 h, resulting in reduction in the thickness of the protective alumina layer. The corrosion primarily occurs intergranular, with sodium and potassium being the main elements entering this region. Notably, when the Si content is 1.2 at.%, the alumina protective layer remains the densest and thickest after high-temperature corrosion of molten chloride salt, which facilitates the formation of a complete and continuous dense oxide layer, the migration of chlorine atoms needs to overcome more energy, thereby enhancing coating resistance against high-temperature corrosion. The coating exhibits the best corrosion resistance. © 2024, The Authors. All rights reserved.

关键词： Corrosion resistance

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Enabling efficient and economical degradation of PCDD/Fs in MSWIFA via catalysis and dechlorination effect of EMR in synergistic thermal treatment

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Chemosphere 2023年 342卷 140164页

作者： Xue, Yang Yang, Tongyuan Liu, Xiaoming Cao, Zhen Gu, Jiarui Wang, Yanlong State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Beijing100083 China School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing100083 China

Catalytic thermal treatment is an efficient and low-energy consumption method for degrading polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in municipal solid waste incineration fly ash (MSWIFA). However, catalysts with high activity are expensive, difficult to separate and reuse from the treated MSWIFA, and they usually pose a risk of heavy metal pollution. Herein, a synergistic thermal treatment method of MSWIFA and electrolytic manganese residue (EMR) at relatively low temperatures was proposed after an in-depth analysis of their mineralogy composition to achieve detoxification of PCDD/Fs in MSWIFA. The mass and WHO-TEQ degradation efficiencies of PCDD/Fs significantly increased from −92.79% and −51.46%–98.57% and 96.10%, respectively, by the addition of electrolytic manganese residue (EMR) with an MSWIFA/EMR ratio of 3:7 in the thermal treatment of MSWIFA at 250 °C for 60 min. The WHO-TEQ concentration of PCDD/Fs in the treated sample decreased to 3.7 ng WHO-TEQ/kg, meeting the European end-of-waste criteria (20 ng WHO-TEQ/kg). The excellent degradation effect of EMR on PCDD/Fs in MSWIFA could be attributed to two aspects: 1) the manganese oxides in EMR has a catalytic effect on the degradation of PCDD/Fs;2) the NH3 generated by the decomposition of (NH4)2SO4 in EMR is conducive to the degradation and resynthesis inhibition of PCDD/Fs. Besides, the thermodynamic calculations indicated that CaClOH in MSWIFA played a crucial role in the decomposition of (NH4)2SO4 in EMR. In addition, the degradation pathways and mechanisms of PCDD/Fs-homologues under the synergistic effect of manganese oxides, ammonia, and thermal field were investigated through comparative analysis of concentration and fingerprint of PCDD/Fs. © 2023 Elsevier Ltd

关键词： Manganese oxide

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Fast-response fluorescent probe with favorable water solubility for highly sensitive imaging of endogenous tyrosinase in living cells and zebrafish model

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Chinese Chemical Letters 2021年第5期32卷 1785-1789页

作者： Zheng Li Xiaofeng Xia Yu You Cuifen Lu Guichun Yang Chao Ma Junqi Nie Qi Sun Shuilin Wu Jun Ren Feiyi Wang Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials&Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules&State Key Laboratory of Biocatalysis and Enzyme Engineering Hubei UniversityWuhan 430062China Key Laboratory for Green Chemical Process of Ministry of Education and School of Chemistry and Environmental Engineering Wuhan Institute of TechnologyWuhan 430205China

Tyrosinase(TYR) is an important polyphenolic oxidase enzyme and usually regards as a biomarker of melano ma *** effective tracking TYR activity in vivo will help to study the mechanism of TYR in living organisms and forecasts related *** this study,we present a novel TYR-activatable fluo rescent probe(CHMC-DOPA) for tracking TYR activity in vitro and in ***-DOPA is constructed by incorporating dopamine(DOPA) moiety into a fluorescent chloro-hydroxyl-merocyanine(CHMC)*** exposure to TYR,the dopamine unit in CHMC-DOPA is oxidized to a dopaquinone derivative,and an intramolecular photo-induced electron transfer(PET) process between CHMC fluorophore and o-dopaquinone will take place,the fluorescence of CHMC-DOPA is quenched ***,the evaluation of TYR activity is established in terms of the relationship between fluorescence quenching efficiency and TYR *** our experiments,CHMC-DOPA shows various advantages,such as fast response(8 min),low concentration of TYR activation(0.5 U/mL),good water-solubility,as well as the lowest detection limit(0.003 U/mL) compared with previously reported ***,CHMCDO PA also exhibits excellent cell membrane permeability and low cytotoxicity,which is successfully used to monitor endogenous TYR activity in living cancer cells and zebrafish ***-DOPA performs well,and we anticipate that this newly designed novel platform will provide an alternative for high effective monitoring TYR activity in biosystems.

关键词： Fast-response Fluorescent probe Tyrosinase Good biocompatibility Fluorescence imaging

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Computational methods for identifying enhancer-promoter interactions

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Quantitative Biology 2023年第2期11卷 122-142页

作者： Haiyan Gong Zhengyuan Chen Yuxin Tang Minghong Li Sichen Zhang Xiaotong Zhang Yang Chen School of Computer and Communication Engineering BeijingAdvanced Innovation Center for Materials Genome EngineeringUniversity of Science and Technology BeijingBeijing 100083China State Key Laboratory of Medical Molecular Biology Department of Biochemistry and Molecular BiologyInstitute of Basic Medical SciencesSchool of Basic MedicineChinese Academy of Medical SciencesPeking Union Medical CollegeBeijing 100005China Shunde Innovation School University of Science and Technology BeijingFoshan 528399China

Background:As parts of the cis-regulatory mechanism of the human genome,interactions between distal enhancers and proximal promoters play a crucial ***,promoters,and enhancer-promoter interactions(EPIs)can be detected using many sequencing technologies and computation ***,a systematic review that summarizes these EPI identification methods and that can help researchers apply and optimize them is still ***:In this review,we first emphasize the role of EPIs in regulating gene expression and describe a generic framework for predicting enhancer-promoter ***,we review prediction methods for enhancers,promoters,loops,and enhancer-promoter interactions using different data features that have emerged since 2010,and we summarize the websites available for obtaining enhancers,promoters,and enhancer-promoter interaction ***,we review the application of the methods for identifying EPIs in diseases such as ***:The advance of computer technology has allowed traditional machine learning,and deep learning methods to be used to predict enhancer,promoter,and EPIs from genetic,genomic,and epigenomic *** the past decade,models based on deep learning,especially transfer learning,have been proposed for directly predicting enhancer-promoter interactions from DNA sequences,and these models can reduce the parameter training time required of bioinformatics *** believe this review can provide detailed research frameworks for researchers who are beginning to study enhancers,promoters,and their interactions.

关键词： enhancer promoter enhancer-promoter interaction machine learning deep learning

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A benzo[ghi]-perylene triimide based double-cable conjugated polymer for single-component organic solar cells

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Chinese Chemical Letters 2022年第1期33卷 466-469页

作者： Dan Wang Zhaofan Yang Feng Liu Chengyi Xiao Yonggang Wu Weiwei Li College of Chemistry and Environmental Science Hebei UniversityBaoding 071002China Beijing Advanced Innovation Center for Soft Matter Science and Engineering&State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China College of Basic Medicine Hebei UniversityBaoding 071002China

Single-component organic solar cells(SCOSCs)with high stability and simplified fabrication process are supposed to accelerate the commercialization of organic ***,the types of photo-active materials and photovoltaic performance of SCOSCs are still far lagging behind the bulk-heterojunction type organic solar cells(BHJ OSCs).It is still an arduous task to introduce new photo-active materials into SCOSCs,aiming to improve the efficiencies of *** feasible way is to construct double-cable polymers with new structures and tune conformation,morphology and mobility for the improvement in power conversion efficiencies(PCEs).Hence,in this work,we constructed a new double-cable polymer PBTT-BPTI by introducing fused core 5,7-dibromo-2,3-bis(2-ethylhexyl)benzo[1,2-b:4,5-c’]dithiophene-4,8-dione(TTDO)into the main backbone and benzo[ghi]-perylene triimide(BPTI)unit into the side *** of the two units show strong electron-withdrawing property,which are expected to broaden absorption spectra and enhance intermolecular *** double-cable polymer exhibited a broad absorption in the range of 300-700 nm with an optical band gap(E_(g))of 1.79 *** PCE of PBTT-BPTI-based SCOSCs was 2.15%,which may be limited by the unconstructed efficient electron transporting channels.

关键词： Double-cable polymer Single-component organic solar cells BPTI Electron withdrawing Electron transporting channels

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Recent Advances of Monolithic All-Perovskite Tandem Solar Cells:From Materials to Devices

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Chinese Journal of Chemistry 2022年第7期40卷 856-871页

作者： Shan Jiang Yiming Bai Zongwen Ma Shengli Jin Chao Zou Zhao'ao Tan State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Key Laboratory of Solar Energy Utilization&Energy Saving Technology of Zhejiang Province Zhejiang Energy Group R&D Institute Co.Ltd.HangzhouZhejiang 311121China College of Chemistry and Materials Engineering Wenzhou UniversityWenzhouZhejiang 325027China

Organic-inorganic metal-halide perovskite solar cells(PerSCs)have achieved significant progresses due to their outstanding optoelectronic charac-teristics,and the power conversion efficiency(PCE)of single-junction PerSCs has been boosted from 3.8%to a certified 25.2%.However,the efficien-cy of single-junction cells is governed by the Shockley-Queisser(S-Q)radiative limit,and fabricating all-perovskite tandem solar cells is a particularly attractive method to break the S-Q *** the bandgap of lead(Pb)-based mixed halide perovskite can be tuned from 1.55 eV to 2.3 eV,and the mixed tin(Sn)-Pb perovskites have bandgap of~1.2 eV,these perovskites become the best candidates for the front and rear subcells of all-perovskite tandem device,*** this review,we firstly summarize the current development progresses of two-terminal(2-T)all-perovskite tandem so-lar *** further optimizing the device performance,the wide bandgap mixed halide perovskites for front subcell,mixed Sn-Pb narrow bandgap perovskites for rear subcell,and the interconnection layer(ICL)of 2-T tandem device are then *** review aims to open a pathway to real-ize highly efficient all-perovskite tandem solar cells.

关键词： Perovskite phase Tandem solar cells Interconnection layer Energy conversion Complementary absorption

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Synergistic black phosphorus and cellulose nanofiber aerogels: A breakthrough in flame-retardant and thermal insulation for building applications

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Applied Thermal engineering 2025年 275卷

作者： Kang, Zeyang Qiu, Shuo Lv, Qingyu Yang, Jun Zhan, Li Li, Yong Liu, Xiangyang He, Maogang State Key Laboratory of Advanced Nuclear Energy Technology Nuclear Power Institute of China Chengdu610213 China Key Laboratory of Thermo-Fluid Science and Engineering Ministry of Education Xi'an Jiaotong University Shaanxi Province Xi'an710049 China

Managing thermal energy effectively in buildings is vital for sustainability, particularly in extremely cold climates. Herein, we present an innovative approach to building insulation by leveraging cellulose nanofiber (CNF)/black phosphorus (BP) aerogels with uniquely aligned xylem-like porous structures. This study posits that the synergistic interplay between CNF and BP significantly enhances thermal insulation, photothermal conversion, and flame-retardant capabilities, offering a cutting-edge solution for advanced thermal management. Using a strategic combination of polyethyleneimine and 3-glycidoxypropyltrimethoxysilane as co-additives, lightweight CNF sponge-like aerogels were fabricated via freeze-drying and post-crosslinking techniques. These aerogels achieved exceptional thermal insulation with a remarkably low thermal conductivity of 0.067 W/(m·K). Additionally, they demonstrated superior photothermal performance, reaching 84 °C within just 300 s under one-sun illumination, effectively maintaining a stable microclimate even at −5 °C by combining photothermal conversion and insulation effects. The flame-retardant properties of the CNF/BP aerogels were equally impressive, with total heat release reduced by 71 % compared to conventional crosslinked CNF aerogels. This is attributed to the robust porous char formed through phosphoric acid crosslinking with internal carbon chains. These multifunctional CNF/BP aerogels not only redefine the boundaries of thermal management but also establish a promising pathway for next-generation thermal protection materials. © 2025

关键词： Thermal insulation

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Effects of Al Content on the Mechanical Properties and Molten Chloride Salt Corrosion Behavior of Ni-Al Coatings

SSRN

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SSRN 2024年

Material selection is crucial in concentrated solar power (CSP) technology due to the significant impact of high-temperature corrosion. Ni-Al coating on the heat resistant steels is an effective approach to the corrosion. The microstructure, hardness, toughness, adhesion, and corrosion resistance of Ni-Al coatings with different Al content were investigated following pre-oxidation treatment. Cracks appeared on the surface of coatings with pre-oxidation Al content ranging from 9.9 at.% to 23.3 at.%, and no continuous Al2O3 oxide film was formed. Notably, when the Al content increased to 41.0 at.% during pre-oxidation, and a continuous α-Al2O3 oxide film was successfully formed. It showed the best toughness and elastic modulus (181.6 GPa), and relatively high coating hardness (8.0 GPa). The corrosion results show that when the Al content is 41.0 at.%, the corrosion resistance of high-temperature chloride molten salt is the best. The oxidation layer formed by the pre-oxidation has a blocking effect on the diffusion of molten salt elements into the coatings. High strength and toughness are accompanied by excellent resistance to high-temperature molten salt corrosion. The results provide a route to fabricate Ni-Al coatings that possess integrated strength, toughness and corrosion resistance suitable for protective coating applications in CSP systems. © 2024, The Authors. All rights reserved.

关键词： Corrosion resistance

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Data-Driven Parameter Estimation of Power Electronics Transformers Based on Koopman Operator

Data-Driven Parameter Estimation of Power Electronics Transf...

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IEEE Conference on Energy Internet and Energy System Integration (EI2)

作者： Minhua Xie Yuxi Liu Huanjin Yao Yang Liu State Key Laboratory of Advanced Power Transmission Technology Beijing China School of Electric Power Engineering South China University of Technology Guangzhou China

This paper proposes a data-driven parameter estimation method for power electronics transformers (PET) based on Koopman Operator. A polynomial form of the dynamic model of a PET is derived based on the Taylor series of the non-polynomial terms. Online identification of the vector field of the dynamic model is realized by Koopman Operator. The parameters contained in the coefficients of the polynomials of the vector field is then estimated by solving a regression problem. Numerical tests suggest that the proposed method is able to offer accurate estimates of the parameters of a PET. The calculational burden is small, and can be used for online operation.

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On-orbit 3D bioprinting for tumor modeling in space

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Trends in Biotechnology 2025年

作者： Fang, Yongcong Hao, Wenshuai Xiong, Zhuo Department of Mechanical Engineering Tsinghua University Beijing100084 China State Key Laboratory of Tribology in Advanced Equipment Beijing100084 China State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment Beijing100084 China Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing Beijing100084 China Beijing100084 China

On-orbit 3D bioprinting offers a more accurate replication of complex tumor environments under space conditions than current 2D and 3D cell models. This technology holds great promise for uncovering regulatory pathways of tumorigenesis and tumor suppression in space, thus accelerating the development of innovative cancer treatments on Earth. © 2025 Elsevier Ltd

关键词： 3D bioprinting cancer therapeutics microgravity space oncology tumor modeling

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