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Energy & Environmental Materials 2024年第2期7卷 79-86页

作者： Dongdong Zhang Qiliang Wei Haili Huang Lan Jiang Jie Teng Ruizhi Yu Qing Zhang Shengxing Liu Lin Wang Weiyou Yang Institute of Micro/Nano Materials and Devices Ningbo University of Technology College of Materials Science and Engineering Hunan University

Crystalline γ-Ga2O3@rGO core-shell nanostructures are synthesized in gram scale,which are accomplished by a facile sonochemical strategy under ambient *** are composed of uniform γ-Ga2O3nanospheres encapsulated by reduced graphene oxide（rGO） nanolayers,and their formation is mainly attributed to the existed opposite zeta potential between the Ga2O3and *** as-constructed lithium-ion batteries（LIBs） based on as-fabricated γ-Ga2O3@rGO nanostructures deliver an initial discharge capacity of 1000 mAh g-1at 100 mA g-1and reversible capacity of600 mAh g-1under 500 mA g-1after 1000 cycles,respectively,which are remarkably higher than those of pristine γ-Ga2O3with a much reduced lifetime of 100 cycles and much lower *** situ XRD and XPS analyses demonstrate that the reversible LIBs storage is dominant by a conversion reaction and alloying mechanism,where the discharged product of liquid metal Ga exhibits self-healing ability,thus preventing the destroy of ***,the rGO shell could act robustly as conductive network of the electrode for significantly improved conductivity,endowing the efficient Li storage *** work might provide some insight on mass production of advanced electrode materials under mild condition for energy storage and conversion applications.

关键词： ambient condition core–shell nanostructures Ga2O3 Li-ion batteries rGO

Controllable growth of single-crystalline zinc oxide nanosheets under ambient condition toward ammonia sensing with ultrahigh selectivity and sensitivity

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Journal of Advanced Ceramics 2022年第8期11卷 1187-1195页

作者： Dongdong ZHANG Zhi FANG Lin WANG Hao YU Xianlu LU Kai SONG Jie TENG Weiyou YANG College of Materials Science and Engineering Hunan UniversityChangsha 410082China Institute of Micro/Nano Materials and Devices Ningbo University of TechnologyNingbo 315211China

To date,the synthesis of crystalline ZnO nanostructures was often performed under high temperatures and/or high pressures with tiny output,which limits their commercial ***,we report the progress on synthesizing single-crystalline ZnO nanosheets under ambient conditions(i.e.,room temperature(RT)and atmospheric pressure)based on a sonochemistry ***,their controllable growth is accomplished by adjusting the pH values of solutions,enabling the tailored crystal growth habits on the polar-charged faces of ZnO along *** a proof of concept for their potential applications,the ZnO nanosheets exhibit highly efficient performance for sensing ammonia at RT,with ultrahigh sensitivity(S=610 at 100 ppm),excellent selectivity,rapid detection(response time/recover time=70 s/4 s),and outstanding detection limit down to 0.5 ppm,superior to those of all pure ZnO nanostructures and most ZnO-based composite counterparts ever *** present work might open a door for controllable production of ZnO nanostructures under mild conditions,and facilitate the exploration of modern gas sensors for detecting gaseous molecules at RT,which underscores their potential toward practical applications in opto-electronic nanodevices.

关键词： zinc oxide(ZnO) nanostructures ambient condition crystal growth gas sensor

Catalytic Aerobic Oxidation of Acetaldehyde over Keggin-type Molybdovanadophosphoric Acid/SBA-15 under ambient condition

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Chinese Journal of Chemistry 2006年第8期24卷 1001-1005页

作者：周琰岳斌包任烈刘世熙贺鹤勇 Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan University Shanghai 200433 China

Keggin-type molybdovanadophosphoric acids （HPA）, H4PMo11VO40 （1）, H5PMo10V2O40 （2） and H6PMo9V3O40 （3） were anchored onto γ-aminopropyltriethoxysilane （APTS） aminosilylated silica mesoporous SBA-15 through acid-base neutralization and the resulting HPA/APTS/SBA-15 were characterized by BET, TEM, XRD, ICP, FFIR and ^31p MAS NMR. The characterization results indicate that the Keggin-structure of these HPAs is preserved within the mesoporous silica host. The samples were tested for catalytic aerobic oxidation of acetaldehyde heterogeneously in liquid phase under ambient condition. The electrostatic force between heteropoly acid and amino groups grafted on the silica channel surface leads to strong immobilization of HPA inside SBA-15 which is against the leaching during the reaction. The good catalytic performance and easy recycle of these catalysts make them as potential environmental friendly catalysts for elimination of indoor air pollutants.

关键词： Keggin-type molybdovanadophosphoric acid aminosilylation mesoporous SBA-15 acetaldehyde,oxidation ambient condition

ambient-condition strategy for rapid mass production of crystalline gallium oxide nanoarchitectures toward device application

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Journal of Materials Science & Technology 2023年第32期163卷 150-157页

作者： Dongdong Zhang Hao Yu Guiqin You Gang Shao Zhi Fang Zhao Liang Tian Zhang Huilin Hou Lin Wang Qiaochu Chen Jie Teng Weiyou Yang College of Materials Science and Engineering Hunan UniversityChangsha 410082China Institute of Micro/Nano Materials and Devices Ningbo University of TechnologyNingbo 315211China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China

Currently,the synthesis of nanostructures still encounters two grand challenges:one is the often-required high temperatures and/or high pressures,and the other is the scalable ***,to break through such bottlenecks,we demonstrate an ambient-condition strategy for rapid mass production of fourthgeneration semiconductor Ga_(2)O_(3)nanoarchitectures assembled by single-crystalline nanosheets in a controlled manner based on *** growth is fundamentally determined by the introduced ethanediamine in rationally designed source materials,which could not only protect the metal Ga against reacting with H_(2)O into GaOOH,but facilitate the reaction of Ga with OH·radicals for target crystalline Ga_(2)O_(3)*** a proof of concept for applications,the as-fabricated Ga_(2)O_(3)nanoarchitectures exhibit superb performances for electromagnetic wave absorption with a reflection loss value of 52.2 dB at 8.1 GHz,and ammonia sensing with high sensitivity and selectivity at room temperature,representing their bright future to be commercially applied in modern devices.

关键词： Semiconductor Crystalline nanostructures Crystal growth ambient condition Device application

High-Performance Perovskite Solar Cells Fabricated via Two-step Slot-die Coating in ambient condition

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High-Performance Perovskite Solar Cells Fabricated via Two-s...

Versatile application of wet-oxidation for ambient CO abatement over Fe(OH)_x supported subnanometer platinum group metal catalysts

第七届新型太阳能电池材料科学与技术学术研讨会

作者： Hengyue Li Mei Gao Junliang Yang State Key Laboratory of Powder Metallurgy School of Physics and ElectronicsCentral South University Flexible Electronics Laboratory CSIRO Manufacturing

Perovskite solar cells(PSCs) have made significant progress and attracted tremendous attention as a promising candidate for the generation of clean energy due to their intrinsic properties of long carrier diffusion lengths,high absorption coefficients,flexible bandgap tuning and defect ***-die coating is a robust deposition technique which can be applied in large-area,roll-to-roll(R2R) printing of perovskite with high material utilization,low cost and high ***,we demonstrate the encouraging result of perovskite solar cells prepared by slot-die coating under ambient condition.A power conversion efficiency(PCE) of 18.36% has been achieved,which is one of the highest performance for perovskite films fabricated by two-step slot-die coating in *** fully slot-die coating process was also explored leading to solar cells devices with a max PCE of 18.13%.Furthermore,devices with 1 cm area yield a champion PCE of 15.1%.

关键词： Perovskite solar cells Slot-die coating ambient condition

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Chinese Journal of Catalysis 2020年第4期41卷 613-621页

作者： Hongling Guan Yang Chen Chongyan Ruan Jian Lin Yang Su Xiaodong Wang Lingbo Qu School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001HenanChina CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina College of Chemistry Zhengzhou UniversityZhengzhou 450001HenanChina

The efficient and stable abatement of CO pollutant under ambient conditions is of great significance;however,it remains a formidable ***,we report the versatile application of wet oxidation over Fe(OH)x supported subnanometer Pt group metal(PGM)catalysts for the complete removal of CO under ambient temperature and humidity ***,the 1.8 wt%Rh/Fe(OH)x catalyst exhibited better durability during a^1400 min run for wet oxidation than for dry CO *** characterization results including HR-TEM,H2-TPR,and in-situ DRIFTS suggested that Fe(OH)x,with good reducibility,promoted by the subnanometer Rh clusters,provided sites for the adsorption and reaction of O2 and H2 O to form OH ***,these OH species reacted with the adsorbed CO on Rh sites with a considerably lower activation energy(9 kJ mol^-1)than that of dissociated 0 species(22 kJ mol^-1),thus rationalizing the outstanding performance of Rh/Fe(OH)x for wet *** experiments with other PGMs revealed a good generality for the application of wet oxidation in the efficient abatement of CO under humid conditions with Fe(OH)x as the support.

关键词： Platinum group metals CO Oxidation ambient condition Fe(OH)x Subnanometer clusters

Fully Roll‑to‑Roll Processed Efficient Perovskite Solar Cells via Precise Control on the Morphology of PbI_(2):CsI Layer

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Nano-Micro Letters 2022年第5期14卷 110-121页

作者： Hengyue Li Chuantian Zuo Dechan Angmo Hasitha Weerasinghe Mei Gao Junliang Yang Hunan Key Laboratory of Nanophotonics and Devices School of Physics and ElectronicsCentral South UniversityChangsha 410083People’s Republic of China Flexible Electronics Laboratory CSIRO ManufacturingClaytonVIC 3168Australia

Perovskite solar cells(PSCs)have attracted tremendous attention as a promising alternative candidate for clean energy *** attempts have been made with various deposition techniques to scale-up ***-die coating is a robust and facile deposition technique that can be applied in large-area roll-to-roll(R2R)fabrication of thin film solar cells with the advantages of high material utilization,low cost and high ***,we demonstrate the encouraging result of PSCs prepared by slot-die coating under ambient environment using a twostep sequential process whereby PbI_(2):CsI is slot-die coated first followed by a subsequent slot-die coating of organic cations containing solution.A porous PbI_(2):CsI film can promote the rapid and complete transformation into perovskite *** crystallinity and morphology of perovskite films are significantly improved by optimizing nitrogen blowing and controlling substrate temperature.A power conversion efficiency(PCE)of 18.13%is achieved,which is promising for PSCs fabricated by two-step fully slot-die-coated ***,PSCs with a 1 cm2 area yield a champion PCE of 15.10%.Moreover,a PCE of 13.00%is obtained on a flexible substrate by the roll-to-roll(R2R)coating,which is one of the highest reported cells with all layers except for metal electrode fabricated by R2R process under ambient condition.

关键词： Perovskite solar cells Slot-die coating Roll-to-roll ambient condition Flexible

Crystallization and Orientation Modulation Enable Highly Efficient Doctor-Bladed Perovskite Solar Cells

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Nano-Micro Letters 2023年第10期15卷 40-52页

作者： Jianhui Chang Erming Feng Hengyue Li Yang Ding Caoyu Long Yuanji Gao Yingguo Yang Chenyi Yi Zijian Zheng Junliang Yang Hunan Key Laboratory of Nanophotonics and Devices School of Physics and ElectronicsCentral South UniversityChangsha 410083HunanPeople’s Republic of China Shanghai Synchrotron Radiation Facility(SSRF) Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204People’s Republic of China Department of Electrical Engineering Tsinghua UniversityBeijing 100084People’s Republic of China Department of Applied Biology and Chemical Technology Faculty of ScienceThe Hong Kong Polytechnic UniversityHong Kong 999077People’s Republic of China

With the rapid rise in perovskite solar cells(PSCs)performance,it is imperative to develop scalable fabrication techniques to accelerate potential ***,the power conversion efficiencies(PCEs)of PSCs fabricated via scalable two-step sequential deposition lag far behind the state-of-the-art spin-coated ***,the additive methylammonium chloride(MACl)is introduced to modulate the crystallization and orientation of a two-step sequential doctorbladed perovskite film in ambient *** can significantly improve perovskite film quality and increase grain size and crystallinity,thus decreasing trap density and suppressing nonradiative ***,MACl also promotes the preferred face-up orientation of the(100)plane of perovskite film,which is more conducive to the transport and collection of carriers,thereby significantly improving the fill *** a result,a champion PCE of 23.14%and excellent longterm stability are achieved for PSCs based on the structure of ITO/SnO_(2)/FA_(1-x)MA_xPb(I_(1-y)Br_y)_3/Spiro-OMeTAD/*** superior PCEs of 21.20%and 17.54%are achieved for 1.03 cm~2 PSC and 10.93 cm~2 mini-module,*** results represent substantial progress in large-scale two-step sequential deposition of high-performance PSCs for practical applications.

关键词： Crystallization regulation Orientation modulation Perovskite solar cells Doctor-blading ambient condition

Controllable synthesis of a hollow Cr2O3 electrocatalyst for enhanced nitrogen reduction toward ammonia synthesis

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Chinese Journal of Chemical Engineering 2022年第1期35卷 358-365页

作者： Lei Shi Yu Yin Hong Wu Rajan Arjan Kalyan Hirani Xinyuan Xu Jinqiang Zhang Nasir Rafique Abdul Hannan Asif Shu Zhang Hongqi Sun School of Engineering Edith Cowan UniversityJoondalupWA 6027Australia College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037China School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

As a fascinating alternative to the energy-intensive Haber-Bosch process,the electrochemically-driven N_(2) reduction reaction(NRR)utilizing the N_(2) and H_(2)O for the production of NH3 has received enormous *** development and preparation of promising electrocatalysts are requisite to realize an efficient N_(2) conversion for NH3 *** this research,we propose a template-assisted strategy to construct the hollow electrocatalyst with controllable *** a paradigm,the hollow Cr_(2)O_(3) nanocatalyst with a uniform size(~170 nm),small cavity and ultrathin shell(~15 nm)is successfully fabricated with this *** promising hollow structure is favourable to trap N_(2) into the cavity,provides abundant active sites to accelerate the three-phase interactions,and facilitates the reactant transfer across the *** to these synergetic effects,the designed catalyst displays an outstanding behaviour in N_(2) fixation for NH3 production in ambient *** the neutral electrolyte of 0.1 mol·L^(-1) Na_(2)SO_(4),an impressive electrocatalytic performance with the NH3 generation rate of 2.72μg·h^(-1)·cm^(-2) and a high FE of 5.31%is acquired respectively at-0.85 V with the hollow Cr_(2)O_(3) *** by this work,it is highly expected that this approach could be applied as a universal strategy and extended to fabricating other promising electrocatalysts for realizing highly efficient nitrogen reduction reaction(NRR).

关键词： Hollow structure Electrocatalytic N_(2)fixation NH_(3)synthesis Template-assisted strategy ambient condition

Experimental advances in superlubricity

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Friction 2014年第2期2卷 182-192页

作者： Quanshui ZHENG Ze LIU Department of Engineering Mechanics CNMMAPLTsinghua UniversityBeijing 100084China National Key Lab of Tribology Tsinghua UniversityBeijing 100084China

Superlubricity,or structural lubricity,is a state that has two contacting surfaces exhibiting no resistance to *** effect has been theoretically described to be possible between two completely clean single crystalline solid ***,experimental observations of superlubricity were limited to nanoscale and under high vacuum or inert gas environments even after twenty years since the concept of superlubricity has been suggested in *** the last two years,remarkable advances have been achieved in experimental observations of superlubricity ranging from micro-scale to centimeters and in ambient *** study aims to report a comprehensive understanding of the superlubricity phenomenon.

关键词： Superlubicity microscale macroscale ambient condition mechanism