Petroleum Science
·
2018
·Vol. 15
·期 1
·146-156
·
IF 1.624
Zhang Rui,Xu Xiaoying,Cao Bing,Li Pei
The pyromellitic dianhydride (PMDA) crosslinked poly(vinyl alcohol) (PVA) was coated on top of the PAN ultrafiltration membrane to form a PVA/PAN composite PV membranes for wastewater desalination. The composite membranes have high application value in industrial wastewater treatment. By varying the membrane fabrication parameters including the weight percent (wt%) of the PMDA, the crosslink temperature and duration, membrane with the best desalination performance was obtained. The composite membrane with a 2-μm-thick PVA selective layer containing 20 wt% of PMDA and being crosslinked at 100 °C for 2 h showed the highest NaCl rejection of 99.98% with a water flux of 32.26 L/(m 2 h) at 70 °C using the 35,000 ppm NaCl aqueous solution as feed. FTIR spectroscopy, wide-angle X-ray diffraction, thermogravimetric analysis and scanning electron microscope have been used to characterize the structures and properties of both the crosslinked PVA dense films and PVA/PAN composite membranes. The effects of the concentrations of PMDA, the crosslinking time and temperature to the membrane water contact angle, swelling degree, salt rejection and water flux were systematically studied.
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NATURE
·
2024
·
IF 50.5
Ding Bin,Ding Yong,Peng Jun,Romano-deGea Jan,Frederiksen Lindsey E. K.,Kanda Hiroyuki,Syzgantseva Olga A.,Syzgantseva Maria A.,Audinot Jean-Nicolas,Bour Jerome,Zhang Song,Wirtz Tom,Fei Zhaofu,Dörflinger Patrick,Shibayama Naoyuki,Niu Yunjuan,Hu Sixia,Zhang Shunlin,Tiranito Farzaneh Fadaei,Liu Yan,Yang Guan-Jun,Brooks Keith,Hu Linhua,Kinge Sachin,Dyakonov Vladimir,Zhang Xiaohong,Dai Songyuan,Dyson Paul J.,Nazeeruddin Mohammad Khaja
Perovskite solar cells (PSCs) are among the most promising photovoltaic technologies due to their exceptional optoelectronic properties 1,2 . However, the lower efficiency, poor stability, and reproducibility issues of large-area PSCs compared to laboratory-scale PSCs are major drawbacks that hinder their commercialisation 3 . Here we report a synergistic dopant-additive combination strategy using methylammonium chloride (MACl) as the dopant and a Lewis-basic ionic-liquid additive, 1,3-bis(cyanomethyl)imidazolium chloride ([Bcmim]Cl). This strategy effectively inhibits the degradation of the perovskite precursor solution (PPS), suppresses the aggregation of MACl, and results in phase-homogeneous and stable perovskite films with high crystallinity and less defects. This approach enabled the fabrication of perovskite solar modules (PSMs) that achieved a certified efficiency of 23.30% and ultimately stabilised at 22.97% over a 27.22 cm 2 aperture area, marking the highest certified PSM performance. Additionally, the PSMs displayed long-term operational stability, maintaining 94.66% of the initial efficiency after 1000 h under continuous one-sun illumination at room temperature. The interaction between [Bcmim]Cl and MACl was extensively studied to unravel the mechanism leading to an enhancement of device properties. Our approach holds significant promise for bridging the benchtop-to-rooftop gap and advancing the production and commercialisation of large-area perovskite photovoltaics.
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Journal of Pharmaceutical Investigation
·
2025
·
IF 5.1
Yuan Haimeng,Chen Yao,Hu Yuting,Li Yanxin,Zhang Hongyuan,Zhang Shenwu,Chen Qin,Zhou Wenhu,Sun Jin,He Zhonggui,Wang Yuequan,Luo Cong
Purpose Chemotherapy remains a key treatment option for cancer therapy. Epirubicin (EPI) is an important antitumor agent. However, the short half-life and pronounced toxic side effects have resulted in suboptimal clinical outcomes. To overcome these challenges, we employed a prodrug strategy combined with bio-nanotechnology to achieve effective treatment with satisfactory safety. In addition, we investigated how the position of disulfide bond affects drug release, pharmacokinetics, and antitumor efficacy of EPI, while also analyzing the underlying mechanisms. Methods We designed and synthesized three lipophilic EPI-C 18 prodrugs (α-ESC, β-ESC, γ-ESC), which were then formulated into carrier-free nanoassemblies (α-ESC NAs, β-ESC NAs, γ-ESC NAs). In vitro studies were conducted to evaluate the stability and drug release of these nanoassemblies, followed by in vivo pharmacokinetic and antitumor efficacy assessments, providing valuable insights into their therapeutic potential. Results The placement of the disulfide bond plays a critical role in influencing the stability, drug release, cytotoxicity, pharmacokinetics, and antitumor effectiveness of the nanoassemblies. Specifically, β-ESC NAs displayed the strongest antitumor activity. Conclusion By constructing reduction-responsive EPI prodrug nanoassemblies, we achieved a highly effective and low-toxicity therapeutic outcome. β-ESC NAs proved to be the most optimal EPI prodrug nanoassembly. This study provides a promising avenue for the clinical use of chemotherapy agents.
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POLYMER BULLETIN
·
2025
·
IF 4
Wang Guoqiang,Wang Yueying,Wei Deyu,Hui Yunfeng,Yu Yiheng,Zhang Mengke,Shi Longqing,Hu Jing
Polylactic acid (PLA) is a kind of bio-based polyester with high tensile strength and poor ductility. Poly(butylene sebacate-co-terephthalate) (PBSeT) is a kind of biodegradable polyester with good ductility. To improve the ductility of PLA, PBSeT with high molecular weight was synthesized and melt blended with PLA to obtain PLA/PBSeT blends with high ductility in this study. Their structures and properties were characterized by differential scanning calorimetry, thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA), and scanning electron microscopy (SEM). Although SEM, DMA, and TGA suggested poor compatibility between PBSeT and PLA, PBSeT can still improve the ductility of PLA. When the PBSeT content was 30 wt%, the elongation at break of the blend increased to 85.9%. PBSeT debonds with the PLA matrix to form internal cavitation and the shear band to absorb a large amount of energy to induce plastic deformation. Meanwhile, PBSeT can reduce the complex viscosity of PLA.
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FIBERS AND POLYMERS
·
2024
·Vol. 25
·期 5
·1815-1824
·
IF 2.2
Xu Jiwei,Zhao Hongjuan,Zhao Qian,Xiong Xiaoqing,Zheng Laijiu,Jiao Chengqi
The color-rendering abilities of esterified natural dyes are influenced by the structure of their parent dyes and the position at which the ester group is introduced, resulting in low efficiency in screening and synthesizing suitable esterified natural dyes for dyeing natural fibers with supercritical carbon dioxide. In this study, density functional theory was used to quickly screen the parent natural dyes and esterification position of natural dyes. The findings indicated that B3LYP/def2-TZVP level and CAM-B3LYP (ω = 0.01)/def2-TZVP level yield the most accurate UV–vis absorption spectra calculations for natural dyes and their esterified derivatives, as evidenced by the smallest error compared to experimental values. The rutin, the carminic acid, and the icariin as the parent dyes were more suitable for esterification, and the introduction of ester groups solely on the glycosides of these dyes had negligible impact on their color-rendering abilities. Furthermore, considering the influence of ester groups on natural dye solubility, it was observed that the dyeing properties of glycoside esterified products derived from rutin, carminic acid, and icariin were better than those of their parent dyes, rendering them more appropriate for dyeing natural fibers in supercritical carbon dioxide.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 9
·1-12
·
IF 5.3
Wang Yanping,Guo Min,Li Yuanyuan,Chen Yan,Wei Hong,Mo Xiaohui,Chai Guolin,Du Yongling,Hu Fangdi
A dual-template molecularly imprinted electrochemical sensor was developed for the simultaneous detection of serotonin (5-HT) and glutamate (Glu). First, amino-functionalized reduced graphene oxide (NRGO) was used as the modification material of a GCE to increase its electrical conductivity and specific surface area, using Glu and 5-HT as dual-template molecules and o-phenylenediamine (OPD) with self-polymerization ability as functional monomers. Through self-assembly and electropolymerization, dual-template molecularly imprinted polymers were formed on the electrode. After removing the templates, the specific recognition binding sites were exposed. The amount of NRGO, polymerization parameters, and elution parameters were further optimized to construct a dual-template molecularly imprinted electrochemical sensor, which can specifically recognize double-target molecules Glu and 5-HT. The differential pulse voltammetry (DPV) technique was used to achieve simultaneous detection of Glu and 5-HT based on their distinct electrochemical activities under specific conditions. The sensor showed a good linear relationship for Glu and 5-HT in the range 1 ~ 100 μM, and the detection limits were 0.067 μM and 0.047 μM ( S / N = 3), respectively. The sensor has good reproducibility, repeatability, and selectivity. It was successfully utilized to simultaneously detect Glu and 5-HT in mouse serum, offering a more dependable foundation for objectively diagnosing and early warning of depression. Additionally, the double signal sensing strategy also provides a new approach for the simultaneous detection of both electroactive and non-electroactive substances.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 3
·1-11
·
IF 5.3
Zhang Wei,Zhang De,Wang Pu,Li Xiaoming,Wang Zhetao,Chen Qiang,Huang Jie,Yu Zhi,Guo Fei,Liang Pei
An ultrasensitive surface-enhanced Raman spectroscopy (SERS) aptamer sensor (aptasensor) using a noble metal nanoparticle-magnetic nanospheres composite was developed for L-theanine detection. It makes use of Fe 3 O 4 @Au MNPs and Au@Ag NPs embedded with the Raman reporter 4-mercaptobenzoic acid (4MBA). Au@4MBA@Ag NPs modified by aptamer and Fe 3 O 4 @Au MNPs modified by cDNA created the aptasensor with the strongest Raman signal of 4MBA through the specific binding of the aptamer. With the preferred binding of L-theanine aptamer to L-theanine, Au@4MBA@Ag NPs were released from Fe 3 O 4 @Au MNPs, causing a linear decrease in SERS intensity to achieve the SERS detection of the L-theanine. The SERS peak of 4MBA at 1078 cm −1 was used for quantitative determination. SERS intensity showed a good log-linear relationship within the range 10 −10 to 10 −6 M of L-theanine. The aptasensor has a high selectivity for L-theanine compared with other twelve tested analytes. Hence, this aptasensor is a promising analytical tool for L-theanine detection. The developed method was applied to the analysis of real samples, demonstrating excellent performance. The comparison with the standard liquid chromatography mass spectrometry method showed an error within 20%. Graphical abstract
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 2
·1-10
·
IF 5.3
Li Hua-Li,Liang Jie-Ling,Li Shun-xing,Liu Feng-jiao,Luo Jia-Yi,Huang Zhao-Jing,Zheng Feng-Ying,Su Ling-Ling,Zhuo You-Bin
The detection of cysteine (Cys) and homocysteine (Hcy) in biological fluids has great significance for early diagnosis, including Alzheimer's and Parkinson's disease. The simultaneous determination of Cys and Hcy with a single probe is still a huge challenge. To enlarge the differences in space structure (line and ring) and energy (-721.78 and -761.08 Hartree) between Cys and Hcy, and to cause a difference of aggregation kinetics, gold nanoparticles (AuNPs) are capped with hydrophilic and low-toxic polyvinylpyrrolidone (PVP) (named AuNPs@PVP) and some surface-active sites of AuNPs are masked, the active area for the binding between AuNPs and the detection object is confined, meanwhile, the stability of AuNPs is improved. A novel nanosensor based on confined active area and aggregation kinetics of AuNPs@PVP, is designed for the identification and determination of Cys and Hcy in 1 and 3 min, respectively, with sufficiently low detection limit (4.12 and 4.35 μM) and linear range (4.12–100 μM) for health evaluation. This single colorimetric sensor was applied successfully to the determination of urine and serum, evidencing high anti-interference ability. Graphical
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JOURNAL OF POROUS MATERIALS
·
2024
·
IF 2.5
Zhang Wenhui,Wu Xinbo,Wang Dazhi,Cai Weijie
As the frequency range of electronic devices gradually expands, exploring frequency insensitive electromagnetic wave adsorption (EWA) materials that can achieve effective absorption in all bands has aroused great interest. A series of Fe 1 − x S@C composite materials with three-dimensional conductive networks were successfully prepared in this work. In the preparation process, poly (aryl ether sulfone) with branched carboxylic (PAES-C) was selected as the skeleton and Fe 3+ ions were introduced via chemical adsorption. The main purpose of this work was to develop array porous composite materials with good EWA property. The work proposed a novel controllable method for preparing metal sulfides to explore the electromagnetic wave absorption. This routine was also developed to prepare other M x S@C composites (M = Fe, Cu, Mn). Compared to Mn x S@C and Cu x S@C composites, the RL min value of Fe 1 − x S@C-4 was − 40.6 dB at 13.52 GHz, and at a thickness of 1.5 mm the effective bandwidth reached 3.12 GHz. Furthermore, its effective absorption band covered Ku, X, and C radar bands at different thicknesses.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 4
·1-10
·
IF 5.3
Liu Yan,Xin Yuying,Wang Xin,Zhang Xianfa,Xu Yingming,Cheng Xiaoli,Gao Shan,Huo Lihua
An electrochemical sensor for detecting ketoprofen was constructed by in-situ grown copper cobaltate (CuCo 2 O 4 ) nanoneedle arrays on a carbon cloth (CC) substrate. The resulting porous nanoneedle arrays not only expose numerous electrochemically active sites but also significantly enhance the electrochemical apparent active area and current transmission efficiency. By leveraging its electrochemical properties, the sensor achieves an impressive detection limit for ketoprofen of 0.7 pM, with a linear range spanning from 2 pM ~ 2 µM. Furthermore, the sensor exhibits remarkable reproducibility, anti-interference capabilities, and stability. Notably, the developed sensor also performed ketoprofen detection on real samples (including drug formulations and wastewater) and demonstrated excellent recognition ability. These exceptional performances can be attributed to the direct growth of CuCo 2 O 4 nanoneedle arrays on the CC substrate, which facilitates a robust electrical connection, provides abundant electrocatalytic active sites, and expands the apparent active area. Consequently, these improvements contribute to the efficient trace detection capabilities of the ketoprofen sensor. Graphical Abstract
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TOPICS IN CATALYSIS
·
2024
·
IF 2.8
Gao Ya,Fang Yarong,Wang Weiwei,Nie Guangze
The application of Co 3 O 4 in activated PMS degradation of organic pollutants has been widely concerned. Due to the limited catalytic performance of pure cobalt catalyst, a novel Cu-Co nanocomposite catalyst was synthesized in this paper for activating PMS to degrade tetracycline (TC). After a small amount of copper was introduced, Cu-Co nanocomposite displayed significant heterogeneous catalytic activity in the activation of PMS. Efficient and rapid degradation of TC was achieved under various pH conditions in the Cu-Co nanocomposite/PMS catalytic system. The generation of a large number of singlet oxygen ( 1 O 2 ) is the dominant factor in TC degradation. This study improved the practicality of the PMS activation system across various environmental conditions. Cu-Co nanocomposites exhibit exceptional catalytic properties, rendering them promising catalysts for practical applications.
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Light-Science & Applications
·
2024
·Vol. 13
·期 1
·1-11
·
IF 20.6
Zhang Dingshuo,Zhu Meiyi,He Yifan,Cao Qingli,Gao Yun,Li Hongjin,Lu Guochao,Cui Qiaopeng,Shen Yongmiao,He Haiping,Dai Xingliang,Ye Zhizhen
Broadband electroluminescence based on environment-friendly emitters is promising for healthy lighting yet remains an unprecedented challenge to progress. The copper halide-based emitters are competitive candidates for broadband emission, but their high-performance electroluminescence shows inadequate broad emission bandwidth of less than 90 nm. Here, we demonstrate efficient ultra-broadband electroluminescence from a copper halide (CuI) nanocluster single emitter prepared by a one-step solution synthesis-deposition process, through dedicated design of ligands and subtle selection of solvents. The CuI nanocluster exhibits high rigidity in the excitation state as well as dual-emissive modes of phosphorescence and temperature-activated delayed fluorescence, enabling the uniform cluster-composed film to show excellent stability and high photoluminescent efficiency. In consequence, ultra-broadband light-emitting diodes (LEDs) present nearly identical performance in an inert or air atmosphere without encapsulation and outstanding high-temperature operation performance, reaching an emission full width at half maximum (FWHM) of ~120 nm, a peak external quantum efficiency of 13%, a record maximum luminance of ~50,000 cd m −2 , and an operating half-lifetime of 137 h at 100 cd m −2 . The results highlight the potential of copper halide nanoclusters for next-generation healthy lighting.
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危险品化学品经营许可证（带存储）