MACROMOLECULAR RAPID COMMUNICATIONS
·
2022
·Vol. 44
·期 4
·2200705
·
IF 5.006
Guang-Lin Fan,Shu-Wei Wang,Ying-Ying Zhang,Zhao-Tie Liu,Zhong-Wen Liu,Lei Wang,Jin-Qiang Jiang,Guo Li
Hydrogel shape memory and actuating functionalities are heavily pursued and have found great potential in various application fields. However, their combination for more flexible and complicated morphing behaviors is still challenging. Herein, it is reported that by controlling the light-initiated polymerization of active hydrogel layers on shape memory hydrogel substrates, advanced morphing behaviors based on programmable hydrogel shapes and actuating trajectories are realized. The formation and photo-reduction-induced dissociation of Fe 3+ -carboxylate coordination endow the hydrogel substrates with the shape memory functionality. The photo-reduced Fe 2+ ions can diffuse from the substrates into the monomer solutions to initiate the polymerization of the thermally responsive active layers, whose actuating temperatures and amplitudes can be facially tuned by controlling their thicknesses and compositions. One potential application, a shape-programmable 3D hook that can lift an object with a specific shape, is also unveiled. The demonstrated strategy is extendable to other hydrogel systems to realize more versatile and complicated actuating behaviors.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
STAR Protocols
·
2023
·
IF 0
Bowen Jin,Yidong Ming,Jinguo Cao,Lizhi Ren,Hong Liu,Kai Wang,Congcong Wu
Summary The efficient functioning and stability of a perovskite photoactive layer are paramount to the performance of solar cell devices. Here, we present a protocol for the synthesis of a high-performance exemplified methylammonium lead iodide (CH 3 NH 3 PbI 3 or MAPbI 3 ) perovskite photoactive layer. We describe steps for preparing the requisite ratios of the precursor powders, synthesizing MAPbI 3 single crystals, and selecting a suitable preparation technique. We then detail a flexible doping strategy for the perovskite photoactive layer. For complete details on the use and execution of this protocol, please refer to Wang and Wu (2020, 2022, 2023). 1 , 2 , 3
研究领域:
材料科学
·
太阳能技术
✓ 已验证
DOI
PubMed
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Liangliang Gui,Yuqi Cui,Yuzhang Zhu,Xiaoqiang An,Huachun Lan,Jian Jin
Enhancing the water permeability of reverse osmosis and nanofiltration (NF) membranes without sacrificing the quality of water production can potentially lead to substantial savings in cost and has considerable practical impact on broad application. Herein, we report a facile fabrication of thin film composite (TFC) NF membrane with crumple polyamide (PA) active layer based on a graphitic carbon nitride (g-C 3 N 4 ) nanofibers network interlayer via interfacial polymerization, where the g-C 3 N 4 nanofibers network film is formed simultaneously with the formation of PA active layer by a self-deposition process. The special g-C 3 N 4 nanofibers network film possesses ultra-high hydrophilicity, high porosity and relative smooth surface, which is favorable to form a defect-free and crumple PA active layer. The g-C 3 N 4 nanofibers network interlayer assisted TFC NF membrane exhibits a high water flux up to 152 L m -2 h −1 (4 bar) while maintains a high salt rejection with Na 2 SO 4 rejection of 98.9%.
研究领域:
材料科学
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环境工程
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2020
·Vol. 23
·期 2
·1013-1025
·
IF 9.48
Ruobin Dai,Hongyi Han,Tianlin Wang,Jiayi Li,Chuyang Y. Tang,Zhiwei Wang
The recycling of end-of-life water purification membranes is of great significance for environmental sustainability. However, only techniques for downcycling end-of-life high-pressure membranes are available. Here, we propose to upcycle fouled microfiltration membranes for fabricating new high-pressure polyamide (PA) thin-film composite membranes via interfacial polymerization (IP). A cross-linked, defect-free, and ultrathin PA active layer was formed on biopolymer-fouled substrates. In contrast to the decreased pure water permeance of substrates caused by biopolymer fouling, the upcycled membranes show excellent water permeance (∼30 L m−2 h−1 bar−1) and Na2SO4 rejection (∼95%) in nanofiltration tests for water purification. The biopolymer foulants regulate the IP process and the formation of the PA layer. Furthermore, the foulants between the PA layer and substrate can create additional channels for water transport. The PA layer formation could also be achieved on real fouled microfiltration substrates. This proof-of-concept study paves the way for upcycling fouled/end-of-life low-pressure membranes to fabricate new high-pressure membranes for water purification, forming a closed eco-loop of membrane recycling.
研究领域:
环境科学
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膜技术
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the American Chemical Society
·
2021
·
IF 15.419
Na Li,Liang Cai,Chao Wang,Yue Lin,Jinzhen Huang,Hongyuan Sheng,Haibin Pan,Wei Zhang,Qianqian Ji,Hengli Duan,Wei Hu,Wenhua Zhang,Fengchun Hu,Hao Tan,Zhihu Sun,Bo Song,Song Jin,Wensheng Yan
Iridium-based perovskites show promising catalytic activity for oxygen evolution reaction (OER) in acid media, but the iridium mass activity remains low and the active-layer structures have not been identified. Here, we report highly active 1 nm IrOx particles anchored on 9R-BaIrO3 (IrOx/9R-BaIrO3) that are directly synthesized by solution calcination followed by strong acid treatment for the first time. The developed IrOx/9R-BaIrO3 catalyst delivers a high iridium mass activity (168 A gIr–1), about 16 times higher than that of the benchmark acidic OER electrocatalyst IrO2 (10 A gIr–1), and only requires a low overpotential of 230 mV to reach a catalytic current density of 10 mA cm–2geo. Careful scanning transmission electron microscopy, synchrotron radiation-based X-ray absorption spectroscopy, and X-ray photoelectron spectroscopy analyses reveal that, during the electrocatalytic process, the initial 1 nm IrOx nanoparticles/9R-BaIrO3 evolve into amorphous Ir4+OxHy/IrO6 octahedrons and then to amorphous Ir5+Ox/IrO6 octahedrons on the surface. Such high relative content of amorphous Ir5+Ox species derived from trimers of face-sharing IrO6 octahedrons in 9R-BaIrO3 and the enhanced metallic conductivity of the Ir5+Ox/9R-BaIrO3 catalyst are responsible for the excellent acidic OER activity. Our results provide new insights into the surface active-layer structure evolution in perovskite electrocatalysts and demonstrate new approaches for engineering highly active acidic OER nanocatalysts.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2023
·Vol. 15
·期 16
·3462
·
IF 5
Yajie Wang,Chaoyue Zhao,Ziqi Cai,Lihong Wang,Liangxiang Zhu,Hui Huang,Guoping Zhang,Peng You,Chen Xie,Yaping Wang,Qing Bai,Tao Yang,Shunpu Li,Guangye Zhang
Organic solar cells (OSCs) have gained increasing attention. Among the various directions in OSCs, all-polymer solar cells (all-PSCs) have emerged as a highly promising and currently active research area due to their excellent film formation properties, mechanical properties, and thermal stabilities. However, most of the high-efficiency all-PSCs are processed from chloroform with an active layer thickness of ~100 nm. In order to meet the requirements for industrialization, a thicker active layer processed from low-vapor pressure solvents (preferentially a hydrocarbon solvent) is strongly desired. Herein, we employ toluene (a hydrocarbon solvent with a much higher boiling point than chloroform) and a method known as sequential processing (SqP) to mitigate the rapid decline in efficiency with increasing film thickness. We show that SqP enables a more favorable vertical phase segregation that leads to less trap-assisted recombination and enhanced charge extraction and lifetime than blend-cast devices at higher film thicknesses.Keywords:all-polymer solar cells;sequential processing;hydrocarbon solvent processing;thick-film active layer
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Shu-Ya Pang,Hao-Ran Zuo,Guo-Dong Ma,Ming Duan,Xin-Liang Li
The morphology and performance of polyamide active layer can be controlled by the pore size and surface porosity of support layer. Nevertheless, further investigation is required to elucidate the impact of pore distribution and the specific role of each pore. Therefore, by introducing polyetherimide (PEI) as a sacrificial top layer, the support layer with a wide pore distribution was prepared by co-casting method. A mathematical model was developed to enable the estimation of the impact of each pore radius and pore distribution on the structure and performance of the active layer. During interfacial polymerization process, the surface pore size and distribution of the support layer influenced the incipient film which consists of the polyamide colloids and dominates the successive growth of polyamide layer. It was suggested that both average pore radius and pore distribution contributed to the composite of incipient film. The overall η of 1.77 for S75 corresponded to an incipient film composed of linear polyamide terminated with MPD and fully cross-linked polyamide, resulting in the best performing membrane (C75) with DC of 0.75 and structural parameter as low as 230 μm. A comparison of C75 with C0 revealed an increase in water flux of 138 % and a minor increase in salt flux of 6.37 %. This work presents a novel approach to enhancing the performance of FO membranes and offers a new perspective on the structure-effect relationship.
研究领域:
材料科学
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膜技术
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Huan Zhao,Zhipeng Yin,Pengcheng Gu,Yang Liu,WeiYan Wang,Huahang Lai,Hai-Qiao Wang,Ning Li,Weijie Song
The state-of-the-art organic solar cells (OSCs) are basically based on halogenated active materials and solvents. However, halogens/halides could be detrimental to the stability of OSCs due to their corrosiveness to the interface and the electrode. On the other hand, the introduction of halogens, especially the use of halogen solvents, could cause hazards to the environment, further limiting the application of OSCs. Thus, it is meaningful to explore and develop efficient and stable OSCs based on halogen-free materials and solvents. It is demonstrated that fully halogen-free OSCs deliver efficient performance as well with an efficiency of 10.42%, based on the nonhalogenated active blend PBDB-T:ITIC and the nonhalogenated processing solvent CS2. More importantly, superior thermal stability is achieved for the halogen-free cells, with 95% of the initial efficiency retained in 1400 h under 85 °C in a N2 atmosphere, due to the stabilized blend morphology and impeded corrosion of the metal electrode. These results provide insights into the thermal degradation of OSCs and suggest possible rules/directions for the design of active materials and selection of solvents to achieve efficient and thermally stable OSCs.
研究领域:
材料科学
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可再生能源
·
太阳能电池技术
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2023
·
IF 4.6
Xiaoshuai Zhang,Teng Li,Cong Yu,Weiqiang Miao,Hui Wang,Yiwei Fu,Bojun Zhou,Dan Liu,Wei Li,Tao Wang
White-light emitting diodes (WLEDs) are mainly constructed by stacking different light-emitting layers with complementary emission spectra. However, this not only requires complex device fabrication processes but also needs comprehensive charge transport regulation, limiting the development and application of WLEDs. In this work, efficient single-layer WLEDs are achieved via doping tiny amount of a red polymer poly[[9-(1-octylnonyl)-9H- carbazole-2,7-diyl]-2,5-thiophenediyl-2,1,3-benzothiadiazole-4,7-diyl-2,5 thiophenediy (PCDTBT8) into the perovskite nanocrystals (NCs) matrix. The 490 nm sky blue perovskite nanocrystals (FA 0.08 Cs 0.92 PbBr 2 Cl) are synthesized and passivated with a short-chain ligand 3-methoxyphenethylamine (MPEA), which enhances luminance and stability at high bias. Energy transfer from NCs to PCDTBT8 significantly enhances red-light emitting in the range from 600 to 750 nm, enabling white-light emission. By tuning of the NCs :PCDTBT8 weight ratio from 400:1 to 150:1, a continuous transition of emission from cold white-light to warm white-light is achieved. With the NCs:PCDTBT8 weight ratio of 250:1, a standard white-light emission with the Commission Internationale de l’Eclairage (CIE) coordinates of (0.33, 0.33), a luminance of 752 cd/m 2 and an external quantum efficiency (EQE) of 1.59% are obtained at a fairly low voltage of 4.8 V.
研究领域:
材料科学
·
光电技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Guo-Dong Ma,Hao-Ran Zuo,Shu-Ya Pang,Ming Duan,Yan Xiong,Xin-Liang Li
Traditional composite polymer membranes suffer from deteriorated rejection when operation temperature exceed 60 °C, which is attributed to the decrease in glass transition temperature of polymer in cross-linked active layer. To address this issue and fabricate thermally stable composite membranes, primary amino group was successfully introduced to polyacrylonitrile (PAN) through reaction between cyan group and diethylenetriamine to firmly anchor polymer chains of active layer on surface of support layer. This not only restrained the movement of polymer chains in the active layer but also the movement of polymer chains in the cross-linked support layer. The resulting thermally stable membrane was used to improve water flux of forward osmosis (FO) process. All the modified FO membranes exhibited substantial thermal stability compared to FO membrane based on original PAN support layer. Taking 1 mol/L NaCl as draw solution and deionized water as feed solution, the water flux of PAN-C3 reached 103.0 ± 8.2 L/(m 2 ·h) at 90 °C, which was three times the value at 25 °C, with a constant J S / J W of 0.35 g/L. Furthermore, the rejection was stable at 93.4 %. This method can be further applied to fabricate thermally stable reverse osmosis and nanofiltration membranes.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yujie Wu,Xingjian Dai,Chentong Liao,Xiaopeng Xu,Qiang Peng
Vertical phase-separated active layer morphology is essential for organic solar cells (OSCs), which can be effectively achieved through layer-by-layer (LbL) processing, enabling independent optimization of donor and acceptor layers. Here, we present a novel strategy to optimize the active layer morphology of D18/L8-BO-based OSCs by incorporating polyfluoroquinoxaline-type polymer additives. Three quinoxaline-based polymers with varying fluorination contents, namely, P2FQx, P3FQx, and P4FQx, were synthesized and evaluated. Although these polymers showed limited performance as standalone donor materials in bulk heterojunction (BHJ) devices, their use as additives in LbL-OSCs significantly enhanced device efficiency. These polymers promoted D18 aggregation, enhanced L8-BO penetration, and facilitated the formation of a vertically phase-separated interpenetrating donor/acceptor network. Among these additives, P2FQx demonstrated the best performance, enabling an optimized morphology and achieving a champion power conversion efficiency (PCE) of 20.13% as well as a high fill factor (FF) of 80.13%. Our results highlight the potential of rationally designed polymer additives to address morphology-related challenges in LbL-OSCs and provide a potential pathway for further development of high-performance and scalable organic photovoltaic devices.
研究领域:
材料科学
·
能源技术
·
光电子学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 8
·5370-5379
·
IF 2.779
Hu Rong,Liu Zixiong,Zhang Jie,Tian Liangliang,Wang Gang,Chen Jinwei,He Kailin,Wang Ruilin
In this contribution, an optimized ternary solvent (chlorobenzene:chloroform:1,8-diiodooctane, CB:CF:DIO) was used to fabricate the high-efficiency polymer solar cells (PSCs). To analyze the effect of ternary solvent on the performance of PSCs, the relation among the morphology of active layer, charge generation-recombination and device performance of PM6:IT-4F solar cells was studied. The results showed that the morphology (i.e., aggregation state of donor and acceptor, phase separation degree) of active layer could be optimized at the ratio of 0.8:0.2 (CB:CF). Besides, we found that charge generation, charge transfer and charge mobility were improved in the CB:CF (0.8:0.2) processed PM6:IT-4F solar cells, thereby the charge recombination process in this device could be reduced compared with other CB:CF ratios processed devices. As a result, a power conversion efficiency of 12.85% was obtained in the CB:CF (0.8:0.2) processed PM6:IT-4F device.
研究领域:
材料科学
·
光伏技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）