JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Chenxin Tian,Jiansuxuan Chen,Xianfeng Li,Ruobin Dai,Zhiwei Wang
Membrane will inevitably reach its end of life during long-term application. The current disposal approach of replacing end-of-life (EOL) membranes by new membranes constrains the economic efficiency and sustainability of the membrane-based wastewater treatment . Herein, we conducted a proof-of-concept study of regenerating EOL polyvinylidene fluoride (PVDF) membranes from a full-scale membrane bioreactor (MBR), to achieve an economical and sustainable membrane-based wastewater treatment. A novel chemical cleaning−solvent treatment−hydrophilic modification strategy was proposed for regenerating the EOL PVDF membranes. After the regeneration, the water permeance of the EOL membrane could be recovered from 43.7 ± 8.8 to 426.0 ± 40.3 L m −2 h −1 bar −1 , which was comparable with that of the new membrane. The solvent treatment slightly dissolved the membrane matrix and facilitated the detachment of recalcitrant foulants, which was responsible for the markedly recovered water permeance. The hydrophilic modification using polydopamine coating effectively improved surface hydrophilicity of membrane, endowing the regenerated membrane with better antifouling performance over the solvent treated membrane. The regenerated membrane was tested in an MBR for real municipal wastewater treatment, where the regenerated membrane possessed a comparable effluent quality, as well as a lower fouling rate over EOL, chemical cleaned, and solvent treated membranes. Compared with the conventional way of membrane replacement, the reduction in expenditure and carbon emission of membrane regeneration was ∼3.0 USD/m 2 -membrane/year and 0.059 kg CO 2 -e/membrane module, respectively. This proof-of-concept study offers a promising strategy of the EOL membrane regeneration to achieve economical and sustainable membrane-based wastewater treatment.
研究领域:
环境科学
·
废水处理
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Nian Cheng,Weiwei Li,Zhenhua Yu,Changlei Wang,Fei Qi,Pei Liu,Yuqing Xiao,Xing-Zhong Zhao
It is a great challenge to prepare high quality perovskite films in ambient atmosphere with high humidity (≥ 50%), since the commonly adopted two step sequential deposition process produces perovskite films with rough surfaces and a large amount of residual PbI 2 . To solve these problems, a facile method using combined solvent and vapor treatment is proposed. The residual PbI 2 is diminished through a solvent treatment process, and then smooth perovskite surface with micrometer scaled perovskite particles is obtained with a CH 3 NH 2 vapor treatment. The quality of the obtained perovskite films is examined in the hole transport material free perovskite solar cells, and power conversion efficiency is boosted up by 17.3% compared with the traditional method. When a CuPc hole transport layer is further introduced, carbon counter electrode based perovskite solar cells exhibit a superior power conversion efficiency of 16.61%. Thus this method shows great potential in further optimizing the performance of perovskite solar cells.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Advanced Materials Technologies
·
2025
·
IF 6.2
Maojun Sun,Zuhao Li,Lu Liang,Tong Chen,Qiang Lou,Lin Zhao,Jiazheng Wang,Xinxin Xu,Bosen Zhang,Yufeng Jin,Hang Zhou
Solution-grown metal halide perovskite single crystals (MHP SCs) hold significant promise for applications in photodetection and high-energy radiation detection. However, the detection performance and long-term operational durability of single-crystal perovskite detectors are hindered by surface defects. Conventional mechanical grinding and polishing methods are time-consuming and labor-intensive, and inevitably pose potential risks related to environmental pollution. In this work, a multiple solvent-based surface engineering strategy is proposed to mitigate these issues. By utilizing the 1-octadecene buffer layer and 1-ethyl-3-methylimidazolium bromide (EMIMBr) ionic liquid passivation agent, the surface morphology is effectively improved and the surface defects of MAPbBr 3 single crystals (MPB SCs) are passivated. The treated MPB SCs demonstrate a substantial increase in photoluminescence intensity, nearly five times greater than that of the untreated samples, along with a prolonged PL lifetime. The photodetectors based on treated MPB SCs exhibit a suppressed dark current of 13.5 nA at a bias of 1 V, and improved response speed. Notably, after 110 days, the unencapsulated devices maintain reliable photodetection performance. Benefiting from suppressed leakage current noise, the planar radiation detectors with an Au/MPB SCs/Au device structure exhibit distinct response to 241 Am@5.49 MeV alpha particles at room temperature.
研究领域:
材料科学
·
光电检测
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
IEEE Journal of Photovoltaics
·
2021
·Vol. 12
·期 1
·322-326
·
IF 3.887
Tianjie Fan,Wenzhan Xu,Yu Gao,Rongguo Xu,Feiyu Kang,Guodan Wei
One-step spin-coating solution deposition was reported as an excellent processing method in perovskite solar cells (PSCs). Antisolvent treatment has been demonstrated to significantly enhance the power conversion efficiency (PCE) of PSCs owing to the formation of high-quality perovskite crystals and passivation of defects. In this article, we alter different antisolvents in solution deposition process, i.e., chlorobenzene, toluene, and diethyl ether, combined with different measurements of scanning electron microscopy, atomic force microscopy, X-ray diffraction, time-resolved photoluminescence, and UV–vis absorption spectrum (UV–vis) to investigate the evolution of perovskite thin films. These results illustrate that a smooth and compact perovskite layer by antisolvent treatment is beneficial to enhancing device performance. A high coverage, large crystal size and smooth Cs
0.15
FA
0.85
PbI
3
thin film with a long carrier lifetime attained via antisolvent treatment is utilized to fabricate an inverted planar heterojunction solar cell, which exhibits PCE more than 15%.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Wei Li,Ying Yang,Xiaoqing Xi,Jianyong Feng
Polylactic acid (PLA) fiber is a degradable material with good environmental friendliness for textile applications. However, the main problems of difficult dyeing of PLA fibers were: high crystallinity to the adsorption of dyes, more ester and methyl groups producing non-hydrophilic problems, long chains making dyes difficult to penetrate, and producing a low dyeing rate. Here, we attempted to change the crystallinity of the PLA fiber to a lower degree from hydrophobic to hydrophilicity property variation, destroy the long chain structure to grant more staining sites, and improve the PLA fiber staining depth and the resilience dyeing effect with deep eutectic solvent (DES) treatment and natural dyes. We discovered that a controlled DES treatment process could make PLA fibers less crystallized, help amorphous areas form, and break up long chains, which lead to more dye sites. After DES treatment, the crystallinity decreased from 56.12 to 29.86%, and the instantaneous water contact angle decreased from 108.79 to 64.39°. The DES-treated PLA fabric exhibited a higher K/S value of 15.14 for natural dyes under specific conditions. The fabric, which had remarkable fastness characteristics and wash resistance, could endure frequent laundering and fulfill the demands of everyday use. Moreover, the fabric had good antimicrobial activity against Escherichia coli, Staphylococcus aureus, and Candida albicans and possessed a certain level of biocompatibility with fibroblasts. This DES treatment and natural dye combination method offered a new strategy for improving PLA fabric staining depth and color fastness, making it a promising option for low-carbon environmental protection in the textile industry.
研究领域:
材料科学
·
纺织工程
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
POLYMER
·
2023
·
IF 4.6
Yaqi Li,Yongjian Cao,Silong Wu,Yuanlai Ju,Xiaohua Zhang,Canhui Lu,Wei Sun
Polyimide (PI) films have been extensively used in the field of microelectronic as insulating materials. With the rapid development of microelectronic devices towards miniaturization and large power, the development of low dielectric properties of PI materials has attracted more and more attention. In this study, the breath figure (BF) process was used to prepare single-layered and multi-layered microporous PI films, for obtaining the low dielectric properties . The BF porous structure of PI film was successfully constructed by two implementing strategies, i.e., solution casting for direct preparation of PI film and solvent treatment upon pre-shaped PI film for in-situ pore-formation. By changing solution concentration, environmental humidity and temperature, efficient manipulation of the pore morphology of the film both on the surface and in the bulk layer was achieved. Such multi-layered porous BF structure has been proved to significantly lower the dielectric constant of PI film, from 3.7 of non-porous film to 1.7 of porous film. In order to further expand the application range of BF microporous PI film, both ways of alkali treatment and thermal oxidation were taken for the cross-linking of the porous PI films, greatly improving the solvent resistance of the film. The original porous morphology was completely retained, ensuring that the low dielectric properties were not affected. This is the first report on the preparation of multi-layered microporous low dielectric PI films by BF process.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Optical Materials Express
·
2017
·Vol. 7
·期 7
·2150-2160
·
IF 2.591
Wenhui Zhang,Yue Jiang,Yang Ding,Mingzhi Zheng,Sujuan Wu,Xubing Lu,Xinseng Gao,Qianming Wang,Guofu Zhou,Junming Liu,Michael J. Naughton,Krzysztof Kempa,Jinwei Gao
We demonstrate an environment-friendly solvent treatment that leads to a dramatic performance improvement of perovskite solar cells, with power conversion efficiency as high as 18%, with good stability. The solvent not only improves perovskite film morphology and crystallinity, but also, at proper growth conditions, leads to the formation of a self-induced textured structure on a dense layer; this increases the interface area between the perovskite active layer and the hole transport layer and thus improves photo generated current density. These results may open a new path to low-cost and high efficiency perovskite solar cells.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2017
·
IF 4.536
Wei-Long Xu,Meng-Si Niu,Xiao-Yu Yang,Peng-Qing Bi,Kang-Ning Zhang,Chao Xiong,Hong-Chun Yuan,Trevor A. Smith,Kenneth P. Ghiggino,Xiao-Tao Hao
Perovskite microplates have important implications in the fields of functional electronics and optoelectronics. We report a facile strategy, antisolvent treatment for the growth of perovskite microplates. The morphology and crystalline quality of the microplates could be controlled by the amount of the chlorobenzene antisolvent used. An appropriate amount of antisolvent facilitates the formation of high-quality perovskite microplates with no residual precursor remaining. Spatially and temporally resolved fluorescence measurements demonstrate the heterogeneity of defect-state density and recombination processes in various perovskite microplate regions. The body center shows higher defect state density when compared with that at the edge or the corner of the microplate. Excessive antisolvent degrades the microplates into smaller particles. The results of this study reveal the factors that influence the crystallization process and photophysical dynamics of perovskite microplates.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2019
·Vol. 26
·期 5
·3095-3109
·
IF 3.917
Wang Weiku,Li Yinhui,Li Weijie,Zhang Baohua,Liu Yaodong
Abstract This study systematically investigated the structural changes of cotton-based microcrystalline cellulose (MCC) during solvent treatment in water and dimethylacetamide (DMAc), as well as how solvent exchange affects the dissolution rates of MCC in LiCl/DMAc solution. When MCC is soaked in DMAc or water for 3 days or longer, the surface cellulose layers become exfoliated from the MCC particles and these exfoliated portions are solvable in LiCl/DMAc. DMAc treatment significantly improves the nano-porosity of MCC. Thus, the chloride anions are able to diffuse into cellulose and lead to the final dissolution of cellulose chains via charge repulsion effects. On the other hand, water treatment exhibits strong pore closing effect, especially for nano-pores with a diameter < 30 nm, which prohibits the diffusion of chloride anions and the final dissolution of cellulose chains.
Graphical abstract
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Cong Chen,Zhiwen Zhou,Yue Jiang,Yancong Feng,Yating Fang,Jiayan Liu,Mojun Chen,Junming Liu,Jinwei Gao,Shien-Ping Feng
The chlorobenzene (CB) antisolvent is widely used to fabricate high-efficiency perovskite solar cells (PSCs). However, the narrow processing window and the strict volume ratio of a binary mixed solvent limit the fabrication of large-area and high-quality perovskite films. In this work, by systematic investigation of additives with the CB antisolvent, a universal guideline is achieved wherein a small amount of additive with a donor number between 9.0 and 27.0 kcal/mol can significantly widen the antisolvent treating time slot from 2 to 40 s while simultaneously enlarging the processor binary mixed solvent (dimethylformamide/dimethyl sulfoxide) from 7:3 to 0:10. Moreover, this process facilitates the formation of perovskite seeds as templates for perovskite crystal growth, effectively reducing the bulk defects in perovskite films. Finally, the obtained PSCs show remarkable power conversion efficiencies (PCEs) of 22.22 and 19.74% for rigid and flexible devices, respectively.
研究领域:
材料科学
·
光伏技术
·
化学工程
✓ 已验证
DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2022
·Vol. 224
·期 2
·2200305
·
IF 2.996
Haoting Zheng,Kun Wu,Jun Shi
The preparation of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) film is proposed as a simple and industrialized approach. PEDOT:PSS is diluted with deionized water, tetrahydrofuran, dimethyl formamide, and dimethyl sulfoxide before being dry and suction filtered to create a membrane. After treatment with polar organic solvent, the in-plane thermal conductivity of sample is increased from 1.386 to 2.375 Wm −1 K −1 . The electrical conductivity increases from 1.8 to 592 S cm −1 . The structural modifications of PEDOT:PSS considerably increase the heat conductivity, according to UV, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and atomic force microscopy (AFM) characterization. This modification improves the polymer's thermal conductivity by increasing the contact force between molecules and changing the long chain conformation of polymers.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yiru Huang,Shenyue Li,Lei Zhang
Solvent treatment is critical to improving the stability of halide perovskite materials that suffer from notorious issues that inhibit their industrial deployment; however, the complicated perovskite virtual design space with different types of solvent modifiers is inaccessible to traditional trial-and-error methods. In this study, machine learning is employed to predict stable multiple solvent-modified perovskite films under hostile conditions, and a complicated quinary solvent system “DMSO + DMF + toluene + NMP + GBL” is effectively identified to significantly improve the optoelectronic stability of CH3NH3PbI3 in water. The “combinatorial solvent design” approach is realized by an extra tree machine learning model, which leads to a prediction dataset containing aqueous stability labels of 6720 new quinary solvent/perovskite systems. Importantly, the accuracy of the machine learning model is verified via photoelectrochemical experiments, achieving an experimental accuracy of 80%. A machine learning-predicted quinary solvent system offers significantly enhanced aqueous stability and 1000 times larger aqueous photocurrents, compared with the control CH3NH3PbI3 film under the same hostile conditions. This study demonstrates the efficacy of machine learning for solvent design toward stable halide perovskite materials under hostile conditions.
研究领域:
材料科学
·
化学
·
机器学习
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）