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Solvothermal synthesis and adsorption performance of layered boehmite using aluminum chloride and high-alumina fly ash

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Chinese Journal of Chemical Engineering 2024年第6期70卷 280-290页

作者： Jing Wen Ruirui Yuan Tao jiang Tangxia Yu yufan Zhang School of Metallurgy Northeastern UniversityShenyang 110819China Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China Liaoning Key Laboratory for Metallurgical Sensor and Technology Shenyang 110819China

High alumina fly ash(FAHAl)is a kind of bulk solid waste unique to China,whose availability of high-value aluminum and the threat to the environment makes its high-value utilization *** this work,the alumina containing leaching solution obtained from Na_(2)CO_(3) roasting and HCl leaching of FAHAl was used as the mother liquor to prepare layered boehmite in *** preparation process with AlCl_(3) as the raw material was also *** formation process and mechanism of boehmite,the choice of solvent,along with the adsorption capability of Congo red were analyzed by X-ray diffraction,scanning electron microscopy,Fourier transform infrared spectroscopy,Brunauer-Emmett-Teller method and adsorption *** showed that during the preparation of layered boehmite,the precursor Al(OH)_(3) from the reaction of Al^(3+) and OH-is transformed into boehmiteγ-*** existence of ethanol is beneficial to regulate and promote the growth of boehmite crystal *** water and ethanol are mixed with a volume ratio of 2:1 and used as the solvent,the maximum specific surface area of the boehmite is obtained at 135.7 m^(2)·g^(-1),and 99.16%of Congo red can be absorbed after 10 min when AlCl3 is used as a raw *** purified leaching solution is used as the mother liquid,the crystallinity of boehmite decreases slightly when the pH value decreases from 12.5 to *** pH is 11,the removal efficiency of Congo red reaches a maximum of 72.25%.This process not only achieves the extraction of aluminum and high-value utilization of FAHAl but also provides a thought to prepare layered boehmite with adsorption properties.

关键词： High-alumina fly ash Layered boehmite In-situ preparation Solvothermal synthesis Adsorption High-value utilization

Spatially selective p-type doping for constructing lateral WS2 p-n homojunction via low-energy nitrogen ion implantation

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Light(Science & Applications) 2024年第6期13卷 1159-1169页

作者： yufan Kang Yongfeng Pei Dong He Hang Xu Mingjun Ma Jialu Yan Changzhong jiang Wenqing Li Xiangheng Xiao School of Physics and Technology Key Lab of Artificial Micro-and Nano-Structures of Ministry of EducationWuhan UniversityWuhanChina

The construction of lateral p-n junctions is very important and challenging in two-dimensional(2D)semiconductor manufacturing *** researches have demonstrated that vertical p-n junction can be prepared simply by vertical stacking of 2D ***,interface pollution and large area scalability are challenges that are difficult to overcome with vertical stacking *** 2D lateral p-n homojunction is an effective strategy to address these *** selective p-type doping of 2D semiconductors is expected to construct lateral p-n *** this work,we have developed a low-energy ion implantation system that reduces the implanted energy to 300 ***-energy implantation can form a shallow implantation depth,which is more suitable for modulating the electrical and optical properties of 2D ***,we utilize low-energy ion implantation to directly dope nitrogen ions into few-layer WS_(2) and successfully realize a precise regulation for WS_(2) with its conductivity type transforming from n-type to bipolar or even p-type ***,the universality of this method is demonstrated by extending it to other 2D semiconductors,including WSe_(2),SnS_(2) and MoS_(2).Based on this method,a lateral WS_(2) p-n homojunction is fabricated,which exhibits significant rectification characteristics.A photodetector based on p-n junction with photovoltaic effect is also prepared,and the open circuit voltage can reach to 0.39 *** work provides an effective way for controllable doping of 2D semiconductors.

关键词： implantation doping Spatial

Pathological BBB Crossing Melanin-Like Nanoparticles as Metal-Ion Chelators and Neuroinflammation Regulators against Alzheimer’s Disease

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Research 2024年第1期6卷 687-706页

作者： Qianqian Huang Chaoqing jiang Xue Xia yufan Wang Chenxing Yan Xiaorong Wang Ting Lei Xiaotong Yang Wenqin Yang Guo Cheng Huile Gao Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry West China School of PharmacySichuan UniversityChengdu 610041P.R.China Laboratory of Molecular Translational Medicine Center for Translational MedicineKey Laboratory of Birth Defects and Related Diseases of Women and Children(Sichuan University)Ministry of EducationDepartment of PediatricsWest China Second University HospitalSichuan UniversityChengdu 610041P.R.China

Inflammatory responses,manifested in excessive oxidative stress and microglia overactivation,together with metal ion-triggered amyloid-beta(Aβ)deposition,are critical hallmarks of Alzheimer’s disease(AD).The intricate pathogenesis causes severe impairment of neurons,which,in turn,exacerbates Aβaggregation and facilitates AD ***,multifunctional melanin-like metal ion chelators and neuroinflammation regulators(named PDA@K)were constructed for targeted treatment of *** this platform,intrinsically bioactive material polydopamine nanoparticles(PDA)with potent metal ion chelating and ROS scavenging effects were decorated with the KLVFF peptide,endowing the system with the capacity of enhanced pathological blood–brain barrier(BBB)crossing and lesion site accumulation via Aβ*** vitro and in vivo experiment revealed that PDA@K had high affinity toward Aβand were able to hitch a ride on Aβto achieve increased pathological BBB *** engineered PDA@K effectively mitigated Aβaggregate and alleviated neuroinflammation.

关键词： oxidative aggregation chelating

Post-sulphuration enhances the performance of a lactone polymer donor

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Journal of Semiconductors 2021年第7期42卷 11-23页

作者： yufan jiang Ke Jin Xiujuan Chen Zuo Xiao Xiaotao Zhang Liming Ding Department of Chemistry Tianjin UniversityTianjin 300072China Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China

Remarkable progress has been made in conjugated copoly-mer donors due to the development of novel fused-ring ac-ceptor(FRA)building units[1−15].The copolymers based on FRA units have delivered excellent power conversion efficien-cies(PCEs)up to 18.69%in organic solar cells(OSCs)[16].Fused-ring aromatic lactones are promising FRA units[17−19].

关键词： sulphur donor fused

Screening-current-induced magnetic fields and strains in a compact REBCO coil in self field and background field

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Superconductivity 2024年第1期9卷 35-49页

作者： yufan Yan Donghui jiang Peng Song Jeonghwan Park Seungyong Hahn Yunfei Tan Timing Qu Department of Electrical and Computer Engineering Seoul National UniversitySeoul 08826Republic of Korea State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China High Magnetic Field Laboratory Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China Wuhan National High Magnetic Field Center Huazhong University of Science and TechnologyWuhan 430074China

REBa_(2)Cu_(3)O_(7−x)(REBCO)coated conductors,owing to its high tensile strength and current‐carrying ability in a background field,are widely regarded a promising candidate in high‐field *** the great potentials,recent studies have highlighted the challenges posed by screening currents,which are featured by a highly nonuniform current distribution in the superconducting *** this paper,we report a comprehensive study on the behaviors of screening currents in a compact REBCO coil,specifically the screeningcurrent‐induced magnetic fields and *** were carried out in the self‐generated magnetic field and a background field,*** the self‐field condition,the full hysteresis of the magnetic field was obtained by applying current sweeps with repeatedly reversed polarity,as the nominal center field reached 9.17 T with a maximum peak current of 350 *** a background field of 23.15 T,the insert coil generated a center field of 4.17 T with an applied current of 170 ***,a total center field of 32.58 T was achieved before *** the sequential model and the coupled model considering the perpendicular field modification due to conductor deformation are *** comparative study shows that,for this coil,the electromagnetic–mechanical coupling plays a trivial role in self‐field conditions up to 9 *** contrast,with a high axial field dominated by the background field,the coupling effect has a stronger influence on the predicted current and strain *** discussions regarding the role of background field on the strains in the insert suggest potential design strategies to maximize the total center field.

关键词： Electromagnetic-mechanical analysis High‐field insert coil REBCO coated conductor Screening‐current‐induced magnetic field Screening‐current‐induced stress

Efficient and stable CsPbBr3 perovskite solar cells with CB as additive

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Efficient and stable CsPbBr3 perovskite solar cells with CB ...

18% Efficiency organic solar cells

第十届新型太阳能材料科学与技术学术研讨会

作者： Yang Meili Zou Li Cheng Jiajie Wang Jiaming jiang yufan Dong Jingjing School of Science China University of Geosciences (Beijing)

All-inorganic CsPbBr perovskite solar cells(PSCs) with excellent thermal and moisture ***,there are large defects in the perovskite absorber films and serious non-radiative recombination,resulting in a low power conversion *** this,this study used additive engineering to improve the shape and quality of CsPbBr perovskite films by using chlorobenzene as an additive to deal with the large number of defects in the CsPbBr perovskite *** was found that the large density and high boiling point of chlorobenzene treatment of PbBr films can make the PbBr solution in a supersaturated state during spin coating and speed up the crystallization process of PbBr,so as to obtain more loosely porous PbBr films,and thus regulate the growth process of perovskite films and achieve efficient and stable CsPbBr perovskite *** CB treatment,the CsPbBr perovskite solar cell has smaller non-radiative recombination and higher light absorption,achieving a power conversion efficiency of 9.28% in the end.

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Science Bulletin 2020年第4期65卷 272-275页

作者： Qishi Liu yufan jiang Ke Jin Jianqiang Qin Jingui Xu Wenting Li Ji Xiong Jinfeng Liu Zuo Xiao Kuan Sun Shangfeng Yang Xiaotao Zhang Liming Ding Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China Department of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China Department of Chemistry School of ScienceTianjin UniversityTianjin 300072China School of Energy and Power Engineering Chongqing UniversityChongqing 400044China

近年来随着非富勒烯受体材料的快速发展,有机太阳电池效率已经突破17%,同时,开发与非富勒烯受体匹配的宽带隙给体材料也成为新的研究热点.作者团队之前发展了多种基于稠环受体单元的宽带隙D-A共聚物给体材料,稠环受体单元的引入可以降... 详细信息

近年来随着非富勒烯受体材料的快速发展,有机太阳电池效率已经突破17%,同时,开发与非富勒烯受体匹配的宽带隙给体材料也成为新的研究热点.作者团队之前发展了多种基于稠环受体单元的宽带隙D-A共聚物给体材料,稠环受体单元的引入可以降低给体HOMO能级,增强分子堆积,提高空穴迁移率,因此基于这些给体的太阳电池可同时获得高的开路电压、短路电流和填充因子.本文作者采用具有大共轭平面的二噻吩并苯并噻二唑(DTBT)作为受体单元,合成了宽带隙D-A共聚物给体D18. D18与非富勒烯受体Y6共混的单结电池效率达18.22%(认证效率达17.6%),这是目前报道的有机太阳电池效率最高纪录.

关键词： BUILDING-BLOCK POLYMER ACCEPTOR PERFORMANCE DONOR BISADDUCT

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分体空调冷凝器喷雾降温技术实验研究

科学技术创新 2022年第25期 114-117页

作者：蒋宇帆中铁第五勘察设计院集团有限公司北京102600

以北京市某新城综合开发的PPP项目为研究对象,采用室内试验对冷凝器喷雾技术的降温效果进行研究。结果表明,随风量的增加,空气相对湿度曲线均呈现先增加后减小的趋势,冷凝器温度曲线则均呈逐渐降低后略微抬升并收敛的趋势;采用冷凝器喷... 详细信息

以北京市某新城综合开发的PPP项目为研究对象,采用室内试验对冷凝器喷雾技术的降温效果进行研究。结果表明,随风量的增加,空气相对湿度曲线均呈现先增加后减小的趋势,冷凝器温度曲线则均呈逐渐降低后略微抬升并收敛的趋势;采用冷凝器喷雾降温技术后,可提高空调器的制冷量和降低耗电量。

关键词：制冷量冷凝器喷雾降温技术

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新型湿法纳米银制备技术及其毒性行为

功能材料 2022年第2期53卷 2094-2100页

作者：鲁曦泽姜宇凡李英华郝嘉言谭文宇任晓宇东北大学资源与土木工程学院沈阳110000

针对目前纳米银(AgNPs)制备方法中存在的纳米银颗粒粒度分布不均,稳定性较差的问题,利用柠檬酸钠和无水乙醇作还原剂,以柠檬酸钠和聚乙烯吡咯烷酮(PVP)作为保护剂制备纳米银。利用紫外吸收光谱分析、XRD、SEM、TEM、EDS、Zeta电位仪等... 详细信息

针对目前纳米银(AgNPs)制备方法中存在的纳米银颗粒粒度分布不均,稳定性较差的问题,利用柠檬酸钠和无水乙醇作还原剂,以柠檬酸钠和聚乙烯吡咯烷酮(PVP)作为保护剂制备纳米银。利用紫外吸收光谱分析、XRD、SEM、TEM、EDS、Zeta电位仪等多种技术表征所制备纳米银的特征,结果表明纳米银颗粒为球形面心立方结构,粒径分布范围小,平均粒径在49.3 nm左右,分散均匀。采用室内暴露培养的方式,探究了不同浓度纳米银对反硝化无色杆菌(Achromobacter denitrificans)的毒性作用。研究结果表明,AgNPs可抑制Achromobacter denitrificans的生长以及氮降解能力,并且随着AgNPs浓度的增加抑制作用越强。其毒性原理在于小颗粒纳米银可直接进入细菌体内,导致细菌代谢紊乱,而附着在细胞表面的纳米银,可破坏胞膜表面结构,导致表层膜发生破裂,胞内物质泄漏。

关键词：纳米银柠檬酸钠无水乙醇反硝化无色杆菌