JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2024
·Vol. 35
·期 9
·1-11
·
IF 2.8
Yang Ting,Deng Haoyun,Zhang Zhengli,Hu Mi,Cheng Kaiqiang,Chen Yuanjian,Li Junli
Within organic solar cells (OSCs), the cathode interface layer (CIL) is indispensable for promoting the transport and extraction of charges. In this research, an environmentally friendly and cost-effective trans-cinnamic acid (TCA) is doped into PFN-Br to serve as the CIL in OSCs. The molecular structure and electronic structure of TCA were studied in this article using density functional theory (DFT) calculations executed with the Gaussian’16W software. The calculation results based on DFT indicate that TCA exhibits excellent planarity and the lowest unoccupied molecular orbital (LUMO) matching with PFN-Br. Excellent planarity and matched energy levels are advantageous for charge transport and harvesting. Doping TCA into the PFN-Br cathode interface layer improved charge extraction efficiency, and reduced charge recombination phenomena. Consequently, this led to a notable amplification in the maximum power conversion efficiency (PCE) of PBDB-T: IT-M -based non-fullerene devices, achieving an impressive 11.32%. This study furnishes an uncomplicated and cost-effective strategy for improving the PCE in OSCs.
研究领域:
材料科学
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物理化学
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产品关联
DOI
高影响因子
SOLAR ENERGY
·
2018
·
IF 4.374
Xichuan Yang,Weihan Wang,Yanyun Zhang,Licheng Sun
P-type doping is a rational strategy for the enhancement of hole transporting properties of the organic semiconductors as well as the device performance of organic photo-electric devices. We originally introduce a stable and solution processed p-type dopant based on N-oxoammonium salts termed 2,2,6,6-tetramethyl-1-oxopiperidinebromide salt (TEMPO-Br) for 2,2′,7,7′-tetrakis(N, N-di-p-methoxyphenyl-amine)9,9′-spirobifluorene (Spiro-OMeTAD) based solid state dye sensitized solar cells (ssDSC). By introducing TEMPO-Br doped Spiro-OMeTAD and a commercialized D-π-A sensitizer into ssDSCs, a promising device performance of 6.83% is achieved under simulated AM 1.5G solar irradiation (100 mW cm −2 ), which is significantly better than the control devices (∼1.7 times). The doping effect of TEMPO-Br on the photophysical and electrochemical properties of Spiro-OMeTAD, solid state device performance, cationic dye regeneration kinetics and preliminary long-term stability have been systematically investigated. This work indicates a potential application of N-oxoammonium salts as chemical P-type dopants for triphenylamine based hole transporting materials in solid state photo-electric devices.
研究领域:
材料科学
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光电化学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2016
·
IF 4.758
Yun Zhu,Dawei Pan,Xueping Hu,Haitao Han,Mingyue Lin,Chenchen Wang
An electrochemical sensor based on reduced graphene oxide (rGO) and gold nanoparticles (AuNPs) modified electrode was utilized for determination of trace iron in coastal waters with the aid of the iron complexing ligand 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP). 5-Br-PADAP reacted with iron in short chelating reaction time (<3 min). rGO as a support provided large specific surface area for AuNPs, which would facilitate the electrochemical reduction of Fe(III)-5-Br-PADAP. Under the optimized conditions, the response of Fe(III) at this resulting sensor was linear in the range of 30 nM to 3 μM with a detection limit of 3.5 nM. This sensor also had excellent reproducibility and repeatability. Additionally, the modified electrode had been successfully applied to the determination of Fe(III) in real coastal waters.
研究领域:
分析化学
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环境科学
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材料科学
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产品关联
DOI
高影响因子
POLYMER
·
2023
·
IF 4.6
Shilin Liu,Ling Liu,Qifei Wu,Liqun Zhang
Solution-polymerized styrene butadiene rubber (SSBR) and high cis -polybutadiene rubber (BR) are usually used as matrix and silane coupling agent (SCA) modified silica as the filler in the conventional green tire tread. However, the SCA cannot achieve uniform distribution of silica, moreover the modification process generates volatile organic compounds. In this work, a novel silica reinforced epoxidized SSBR(ESSBR)/epoxidized BR (EBR) nanocomposite (S-ESSBR/EBR) without SCA is prepared. The ESSBR and EBR with different epoxidation degree are synthesized by an oxidant H 2 O 2 and reaction-controlled phase-transfer catalyst CPC-PW 4 O 16 . The microstructure and performance of S-ESSBR/EBR nanocomposites are investigated and compared with the silica reinforced SSBR/BR nanocomposite (S-SSBR/BR-Si75) using Si75 as SCA. Silica nanoparticles transfer from ESSBR phase to EBR phase with increasing epoxidation degree of EBR, so the distribution of silica in two phases becomes homogeneous. The S-ESSBR/EBR nanocomposite exhibits high wet skid resistance , low rolling resistance and excellent abrasion resistance as green tire tread.
研究领域:
材料科学
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橡胶化学
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产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
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2020
·Vol. 22
·期 9
·1-11
·
IF 2.132
Zhao Yubin,Li Meng,Matras-Postolek Katarzyna,Yang Ping
Sn 2+ ions were introduced in Cs-Pb-Br nanocrystals (NCs) to test the change of crystal structure and photoluminescence (PL) property. In the cases of Sn/Pb ratios less than 20%, the CsPb 1- x Sn x Br 3 NCs revealed CsPbBr 3 crystal structure. With increasing the Sn/Pb ratio, Cs-Pb-Sn-Br NCs exhibited a mixture phase of CsPbBr 3 and Cs 4 PbBr 6 . The NCs show bright PLQYs (87%) for Sn/Pb molar ratio of 30%. This is ascribed to little amount Cs 4 PbBr 6 decreased the electrons and holes non-radiation recombination of CsPbBr 3 . With increasing the Sn/Pb ratio to 80%, the Cs 4 Pb 1- x Sn x Br 6 NCs exhibited pure Cs 4 PbBr 6 phase structure. Furthermore, a weak blue-emitting peak around 450 nm was observed for the Cs 4 Pb 1- x Sn x Br 6 NCs. This confirms that Sn 2+ ions were successfully introduced into Cs 4 PbBr 6 structure. The morphologies of samples changed from initial cubic to hexagonal with increasing Sn/Pb ratios from 20 to 80%. The excitons and free carrier dynamics of the NCs were discussed. Graphical abstract
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
ACS Nano
·
2021
·
IF 15.881
Xinliang Li,Na Li,Zhaodong Huang,Ze Chen,Yuwei Zhao,Guojin Liang,Qi Yang,Mian Li,Qing Huang,Binbin Dong,Jun Fan,Chunyi Zhi
With fluidity and dangerous corrosiveness, liquid insulating bromine elemental (Br2) can hardly be confined by traditional conductive carriers (mainly carbon materials) for efficient redox without shuttle behavior. Thus, stationary Br2-based energy storage devices are rarely advanced. Here, we introduce an electrochemical active parasite Br2 to the Ti3C2TXMXene host and construct an advanced aqueous zinc redox battery via a facile electrodeposition process (Br-Ti3C2TX). Both ex situ experimental characterizations and density functional theory (DFT) simulations have validated the natural affinity between MXenes and Br species, which is manifested as their spontaneous fixation accompanied by rapid transfer of electrons in the interface region and interlayer confinement. Consequently, the battery delivers a high-voltage plateau at 1.75 V that contributes to an improved energy density of 259 Wh kg–1Br (144 Wh kg–1Br-Ti3C2TX), exhibiting efficient output capability in the high-voltage region. Besides, benefiting from enhanced redox kinetics, the capacity achieved at −15 °C approaches to 69% of the value at room temperature. More importantly, an excellent 10 000 cycles at −15 °C with negligible capacity decay is identified. The paradigm represents a step forward for developing stationary aqueous metal-Br2 batteries.
研究领域:
材料科学
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电化学
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能源存储
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF EXPERIMENTAL BOTANY
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2020
·Vol. 72
·期 5
·1748-1763
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IF 5.908
Wang Li,Liu Jing,Shen Yitong,Pu Ruolan,Hou Meiying,Wei Qiang,Zhang Xinzhen,Li Guishuang,Ren Hongyan,Wu Guang
Brassinosteroids (BRs) are essential plant hormones. In angiosperms, brassinolide and castasterone, the first and second most active BRs, respectively, are synthesised by CYP85A2 and CYP85A/A1, respectively. BRs in angiosperms function through an essential receptor, BR Insensitive 1 (BRI1). In addition, some angiosperms also have non-essential BRI1-like 1/3 (BRL1/3). In conifers, BRs promote seed germination under drought stress; however, how BRs function in gymnosperms is unknown. In this study, we performed functional complementation of BR biosynthesis and receptor genes from Picea abies with respective Arabidopsis mutants. We found that P. abies possessed functional PaCYP85A and PaBRL1 but not PaCYP85A2 or PaBRI1, and this results in weak BR signaling, and both PaCYP85A and PaBRL1 were abundantly expressed. However, neither BR treatment of P. abies seedlings nor expression of PaBRL1 in the Arabidopsis Atbri1 mutant promoted plant height, despite the fact that BR-responsive genes were activated. Importantly, chimeric AtBRI1 replaced with the BR-binding domain of PaBRL1 complemented the Atbri1 phenotypes. Furthermore, PaBRL1 had less kinase activity than BRI1 in vitro. Overall, P. abies had weak but still active BR signaling, explaining aspects of its slow growth and high stress tolerance. Our study sheds light on the functional and evolutionary significance of distinct BR signaling that is independent of BRI1 and brassinolide.
研究领域:
植物生物学
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分子生物学
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遗传学
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植物生理学
✓ 已验证
DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
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2024
·
IF 4.3
Xueqing Shi,Lvye Yang,Jianfeng Yao
A new simple preparation method for water-in-salt-type cellulose hydrogels filled with ZnBr 2 is reported. The ZnBr 2 hydrogel electrolyte can be applied to zinc-ion hybrid supercapacitors and Zn–Br interfacial batteries. The water-in-salt ZnBr 2 hydrogel serves as a stable electrolyte for good electrochemical performance in zinc-ion hybrid supercapacitors without redox reactions and can participate in the charging/discharging process of the Zn–Br interfacial battery through the redox reaction of halogen anions. The assembled zinc-ion hybrid supercapacitor exhibits a specific capacitance of 241.8 F g −1 at 0.5 A g −1 . Furthermore, after a 10,000-cycle-long charging/discharging test at 5 A g −1 , the coulombic efficiency is found at nearly 100 %. The interfacial battery reaches the highest energy efficiency of 66 % at a current density of 3 mA cm −2 at 0–1.8 V and displays a good cycle life with an 88 % average coulombic efficiency at 3 mA cm −2 . This work expands the application of hydrogels and provides new possibilities for optimizing the high performance of electrolytes.
研究领域:
材料科学
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能源存储
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电化学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2024
·
IF 10.8
Wenxiao Zheng,Xin Luo,Hengyi Fu,Weijian Duan,Shishu Zhu,Xin Yang,Chunhua Feng
The electrochemical technology provides a practical and viable solution to the global water scarcity issue, but it has an inherent challenge of generating toxic halogenated byproducts in treatment of saline wastewater. Our study reveals an unexpected discovery: the presence of a trace amount of Br– not only enhanced the electrochemical oxidation of organic compounds with electron-rich groups but also significantly reduced the formation of halogenated byproducts. For example, in the presence of 20 μM Br–, the oxidation rate of phenol increased from 0.156 to 0.563 min–1, and the concentration of total organic halogen decreased from 59.2 to 8.6 μM. Through probe experiments, direct electron transfer and HO• were ruled out as major contributors; transient absorption spectroscopy (TAS) and computational kinetic models revealed that trace Br– triggers a shift in the dominant reactive species from Cl2•– to Br2•–, which plays a key role in pollutant removal. Both TAS and electron paramagnetic resonance identified signals unique to the phenoxyl and carbon-centered radicals in the Br2•–-dominated system, indicating distinct reaction mechanisms compared to those involving Cl2•–. Kinetic isotope experiments and density functional theory calculations confirmed that the interaction between Br2•– and phenolic pollutants follows a hydrogen atom abstraction pathway, whereas Cl2•– predominantly engages pollutants through radical adduct formation. These insights significantly enhance our understanding of bromine radical-involved oxidation processes and have crucial implications for optimizing electrochemical treatment systems for saline wastewater.
研究领域:
环境科学
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电化学
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水处理技术
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产品关联
DOI
PubMed
高影响因子
ChemNanoMat
·
2025
·
IF 2.6
Zhixin Gao,Meng Yan,Zhen Sun,Teng Wang,Yaoming Zhang,Sen Lin,Yong Yang
Porous layered hydroxides has garnered significant attention for ion adsorption applications due to their unique combination of layered and porous structures. Herein, porous layered lanthanum hydroxide nanowires (NWs) is synthesized to efficiently adsorb Br − , utilizing the modulation of interlayer ions to optimize their performance. These NWs exhibit a porous surface structure and a positively charged surface, which increases the number of active sites and enhances their affinity for Br − . The layered hydroxide lanthanum acetate (LHL-acetate) NWs possess an adsorption capacity of 221 mg g −1 , a wide range of pH suitability (from 3.0 to 10.0) and remarkable stability, surpassing many previously reported adsorbents. The superior Br − adsorption performance of LHL-acetate NWs can be attributed to the synergistic effect between ion-exchange properties of interlayer anions and surface adsorption facilitated by the porous structure, which strengthens electrostatic interactions at the adsorbent-solution interface. Impressively, these NWs achieved 100% Br − removal from simulated wastewater with varying initial concentrations and flow rates in a fixed-bed adsorption system, highlighting the effectiveness of LHL-acetate NWs for advanced Br − removal in practical applications. This study reveals the structure-reactivity relationship of porous layered lanthanum hydroxide adsorbents and offers insights for the application of such materials in the adsorption domain.
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产品关联
DOI
高影响因子
Materials
·
2018
·Vol. 11
·期 5
·717
·
IF 2.467
Jing Li,Huijie Zhang,Song Wang,Debing Long,Mingkai Li,Duofa Wang,Tianjin Zhang
The perovskite CsPbBr3attracts great attention due to its potential in optoelectronics. However, stability remains a major obstacle to achieving its effecting application. In this work, we prepared CsPbBr3solids through a simple reaction and investigated reversible conversion between CsPbBr3, Cs4PbBr6, and CsPb2Br5. We found that CsPbBr3can be respectively converted to Cs4PbBr6or CsPb2Br5by reacting with CsBr or PbBr2. Thermodynamic analysis demonstrated that the chemical reactions above were exothermic and occurred spontaneously. Moreover, the formed Cs4PbBr6could be converted to CsPbBr3reversely, and then progressively converted to Cs-deficient CsPb2Br5by extraction of CsBr with water. The CsPb2Br5was converted to CsPbBr3reversely under thermal annealing at 400 °C. The thermodynamic processes of these conversions between the three compounds above were clarified. Our findings regarding the conversions not only provide a new method for controlled synthesis of the ternary Cs-Pb-Br materials but also clarify the underlying mechanism for the instability of perovskites CsPbBr3.
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DOI
高影响因子
ACS Biomaterials Science & Engineering
·
2018
·
IF 4.432
Rong Bai,Jing Kang,Oudjaniyobi Simalou,Wenxin Liu,Hui Ren,Tianyi Gao,Yangyang Gao,Wanjun Chen,Alideertu Dong,Ran Jia
N-Halamine compounds have attracted great attention because they are recognized as promising antibacterial agents to control microbial contamination; however, most of the research interests were focused on N-halamines that contain N–Cl bond(s) rather than N–Br bond(s). In this contribution, we report the facile fabrication of N–Br bond-containing N-halamine nanofibers using the electrospinning method for antibacterial usages. The as-produced N–Br bond-containing N-halamine nanofibers (i.e., DBDMH/PAN nanofibers) comprise an antibacterial component of 1,3-dibromo-5,5-dimethylhydantoin (DBDMH) and a support component of polyacrylonitrile (PAN). When systematic characterizations were carried out, the as-obtained DBDMH/PAN nanofibers were proven to exhibit well-defined fiber-like morphology and be highly efficient in the killing of the selected model bacteria (Escherichia coli). Their morphology and size could be well governed by tuning the concentration of electrospinning precursor and the mass ratio of PAN to DBDMH. The antibacterial mechanism of the DBDMH/PAN nanofibers and their stabilities under dry, wet, and bacterial conditions were confirmed as well. Facile synthesis and antibacterial activity allow the feasibility of the final N–Br bond-containing N-halamine nanofibers for antibacterial-related clinical applications in practice. Our work highlights the development of the N–Br bond-containing N-halamine nanofibers as promising antibacterial agents for biomedical applications.
研究领域:
材料科学
·
抗菌材料
·
纳米技术
·
生物医学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）