Advanced Electronic Materials
·
2024
·
IF 5.3
Wei Wang,Yujun Deng,Shuai Sun,Massimiliano Galluzzi,Yang Jiao,Paul K. Chu,Zeren Li,Jia Li,Jianquan Yao
Visible-blind ultraviolet (VBUV) photodetectors are designed for UV detection without responding to visible light, thus having many applications in communications, flame detection, environment monitoring, and astronomy. Herein, an organic device concept based on the bulk heterojunction (BHJ) photodiode is presented for high-performance VBUV photodetection and imaging. The BHJ, comprised of an organic electron donor, 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8-BTBT), and an electron acceptor, indene-C 60 bisadduct (ICBA), shows efficient generation and transport of free charges upon UV irradiation. The organic photodiode (OPD) delivers exceptional VBUV photodetection performance. At a low voltage of −0.5 V, the device exhibits a wide linear dynamic range of 98.15 dB. Furthermore, the OPD can detect ultra-low light intensities down to 0.58 µW cm −2 with a high photoresponsivity of 0.12 A W −1 and specific detectivity of 2.75 × 10 12 Jones. More importantly, by integrating the OPD with a readout integrated circuit, the pixel-array organic VBUV imager is demonstrated to have high-quality imaging capability. The results reveal a novel strategy to design VBUV photodetectors and imagers with balanced performance, cost, area, flexibility, and power consumption.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Feng Ye,Shuanshi Fan,Xuemei Lang,Yanhong Wang,Gang Li
Silicalite-1 zeolite membranes were successfully activated at 300–350 °C in a hydrogen atmosphere. FTIR, TGA, and N 2 adsorption-desorption characterizations confirmed that the amount of the organic structure directing agent (OSDA) residue in silicalite-1 zeolite channels was tunable. The H 2 -calcined membrane showed a lower gas permeance than that of the air-calcined membrane due to the partial pore blockage by the OSDA residue. The permeance of H 2 and CO 2 increased with increasing temperature, showing an activated diffusion-like mechanism. The activation energies for the permeation of H 2 and CO 2 were in the range of 1.63–4.15 and 0.76–5.90 kJ mol −1 , respectively, which confirmed the reduced average membrane pore size and different pore surface chemistry due to the presence of the OSDA residue in the membrane. Significant interactions between CO 2 molecules and OSDA residues confined in the membrane resulted in a notably lower CO 2 permeance compared to N 2 and CH 4 , despite CO 2 having a smaller kinetic diameter. Enhanced H 2 /CO 2 selectivity in the silicalite-1 zeolite membrane, featuring confined OSDA residue, was attributed to the reduction in membrane pore size and the fine-tuning of pore surface chemistry.
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POLYMER
·
2018
·
IF 3.483
Jinggang Wang,Xiaoqing Liu,Zhen Jia,Liyuan Sun,Yajie Zhang,Jin Zhu
Poly(ethylene- co -1,4-cyclohexanedimethylene 2,5-furandicarboxylate) (PECF), with different contents of trans - or cis -CHDM isomers, was synthesized to investigate the influence of CHDM configuration on its properties. Before properties investigation, their chemical structures , composition and molecular weight as well as molecular weight distribution were determined by nuclear magnetic resonance (NMR) and gel permeation chromatography (GPC). Their thermal and dynamic mechanical properties as well as barrier properties were measured by differential scanning calorimeter (DSC), thermogravimetric analyzer (TGA), dynamic mechanical analysis (DMA) and gas permeability tester. Results showed that the PECFs could be changed from amorphous polyester (PECF-trans 25) to highly crystalline polyester (PECF-trans 98) by increasing the content of trans -CHDM from 25% to 98%. The melting temperature of PECF-trans 98 was as high as 252 °C and its crystallization half-time was only 15 s. Besides the tensile modulus and strength, the O 2 and CO 2 barrier property of PECFs were all increased with the increasing content of trans -CHDM. When the content of trans -CHDM was higher than 55%, PECFs showed excellent gas barrier properties, which was better or comparable to those of PEN and PEI.
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JOURNAL OF CELLULAR PHYSIOLOGY
·
2017
·Vol. 233
·期 6
·4919-4925
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IF 4.08
Ji Li,Mincheng Zhang,Yong Mao,Yimao Li,Xiaoxia Zhang,Xuehan Peng,Feng Yu
Aristolochic acid I (AA-I), one of the main active components in Aristolochaia herbs, may induce aristolochic acid nephropathy (AAN). Renal interstitial fibrosis is one of the most typical features of AAN. To investigate the mechanism of Aristolochic acid I (AA-I) −induced renal epithelial-mesenchymal transition (EMT) and determine the role of aquaporin-1 (AQP1) in this process, we established an AA-I-induced EMT model in human proximal tubular epithelial cells (HK-2 cells). Morphological examination, MTT assay, and Western blot analysis were performed. Aquaporin 1 (AQP1) and several EMT-related proteins were detected, thereby suggesting the occurrence of AA-I-induced EMT. Two main pathways of transforming growth factor-β (TGF-β) signaling, namely, Smad-dependent and Smad-independent signaling pathways, were also detected. The results showed that the TGF-β / Smad-independent signaling pathways (β-catenin, Ras-Raf-Erk1/2 signaling pathways) were activated, and AQP1 expression was decreased during the AA-I induced EMT on HK-2 cells. With the presence of TGF-β1 receptor inhibitor (LY364947) and Erk1/2 inhibitor (PD98059), AQP1 expression was altered by PD98059, suggested that AQP1 could be adjusted by Erk1/2 signaling. Moreover, the inhibitory effect of AA-I on AQP1 was stronger than that of TGF-β1, suggested that AQP1 may be an important target on AAN clinical therapy.
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PubMed
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2018
·Vol. 2018
·期 8
·1047-1052
·
IF 2.507
Xiaoxia Jia,Ning Yuan,Li Wang,Jiangfeng Yang,Jinping Li
Graphical Both high selectivity and adsorption capacity in the adsorptive separation of CO 2 , CH 4 , and N 2 were achieved by means of (CH 3 ) 2 NH functionalization of the unsaturated metal sites of the MOF Ni-HKUST-1. Ni-HKUST-1, with the same topological structure as Cu-BTC (HKUST-1), was synthesized by a (CH 3 ) 2 NH-assisted method. Ni-HKUST-1 with high purity (> 90 %), yield (85 %), and BET surface area (1088 m 2 /g) was successfully synthesized for the first time by using NiCl 2 . The pure-component adsorption isotherms of CO 2 , CH 4 , and N 2 on Ni-HKUST-1 were measured by the volumetric method and the data used to estimate the separation selectivity for CO 2 /CH 4 , CH 4 /N 2 , and CO 2 /N 2 binary mixtures according to the ideal adsorbed solutions theory. At 273 K and 1 atm, the selectivities for CO 2 /CH 4 , CH 4 /N 2 , and CO 2 /N 2 were 14.49, 5.36, and 183.41, respectively, and the adsorption capacities for CO 2 and CH 4 were 223.87 and 67.89 cm 3 /g, respectively. This is a rare demonstration of both high selectivity and adsorption capacity in the separation of CO 2 , CH 4 , and N 2 .
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INTERNATIONAL MICROBIOLOGY
·
2024
·
IF 2.3
Pan Lixu,Yuan Bo,Li Qingqing,Ouyang Ji,Yang Jie,Zhou Yan,Cui Changzheng
Chlorobenzene (CB), extensively used in industrial processes, has emerged as a significant contaminant in soil and groundwater. The eco-friendly and cost-effective microbial remediation has been increasingly favored to address this environmental challenge. In this study, a degrading bacterium was isolated from CB-contaminated soil at a pesticide plant, identified as Pandoraea sp. XJJ-1 (CCTCC M 2021057). This strain completely degraded 100 mg·L −1 CB and showed extensive degradability across a range of pH (5.0–9.0), temperature (10–37 °C), and CB concentrations (100–600 mg·L −1 ). Notably, the degradation efficiency was 85.2% at 15 °C, and the strain could also degrade six other aromatic hydrocarbons, including benzene, toluene, ethylbenzene, and xylene ( o- , m- , p- ). The metabolic pathway of CB was inferred using ultraperformance liquid chromatography, gas chromatography-mass spectrometry, and genomic analysis. In strain XJJ-1, CB was metabolized to o -chlorophenol and 3-chloroxychol by CB monooxygenase, followed by ortho- cleavage by the action of 3-chlorocatechol 1,2-dioxygenase. Moreover, the presence of the chlorobenzene monooxygenation pathway metabolism in strain XJJ-1 is reported for the first time in Pandoraea . As a bacterium with low-temperature resistance and composite pollutant degradation capacity, strain XJJ-1 has the potential application prospects in the in-situ bioremediation of CB-contaminated sites.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xinyuan Lyu,Luchao Ren,Le Xin,Xianfu Luo,Hui Peng,Zhichao Dong,Cuncheng Li,Panpan Lyu,Mingwei Zhang
A novel series of (1- x )MgGa 2 O 4 - x BaCu(B 2 O 5 ) ( x = 0.1–0.5) microwave dielectric ceramics were prepared by solid phase method. By adding BaCu(B 2 O 5 ) additives, the sintering temperature of MgGa 2 O 4 ceramics was reduced from 1410 °C to 925 °C. Through an analysis of the trend in packing fraction and FWHM value of T 2g Raman peak, the underlying influence mechanism of various intrinsic factors on the dielectric loss of ceramic were revealed. And the density, as the external factors, exhibits a positive correlation with the dielectric constant and Q × f value. In addition, the high bond strength of Ga-site reduces lattice distortion and consequently enhances the frequency temperature coefficient. The microwave dielectric properties of (1- x )MgGa 2 O 4 - x BaCu(B 2 O 5 ) ( x = 0.3) are found to be superior at a sintering temperature of 925 °C (ε r = 9.42, Q × f = 35,480 GHz, τ f = −22.7 ppm/°C, at 14 GHz). Moreover, the chemical compatibility of ceramics cofiring with Ag electrode makes them a highly promising substrate for microwave communications.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Shuai Ma,Xiaohua Zhang,Jie Zhang,Xiaohui Zhang,Yu Liu,Chenglong Yu,Zhenxing Yue
Low-loss microwave dielectrics are of significant importance for the miniaturization and integration of microwave devices. In this paper, the ceramics of nominal composition Mgn+1TinO3n+1 (n = 3–6) are synthesized, and the correlations among their phase compositions, defect behaviors, and microwave dielectric properties are systematically investigated. The analyses indicate that the Mgn+1TinO3n+1 ceramics are a biphasic system consisting of hexagonal ilmenite-structured MgTiO3 and cubic spinel-structured Mg2TiO4. The Rietveld refinement results demonstrate that as the n value increases, the content of the MgTiO3 phase gradually increases, while that of the Mg2TiO4 phase decreases. The results of the thermally stimulated depolarization current (TSDC) indicate that the oxygen vacancy-related defects are considered to be the main types of defects in Mgn+1TinO3n+1. As the value of n increases, the increase of the MgTiO3 phases with a more stable crystal structure leads to a gradual decrease in the concentration of oxygen vacancies. The Mgn+1TinO3n+1 ceramics exhibit excellent microwave dielectric properties at n = 6: εr = 17.55, Q × f = 284,600 GHz, and τf = −46.39 ppm/°C. In addition, the relationship between the dielectric constant and the electric field distribution is solved utilizing high-frequency structure simulator (HFSS) software, and the Q × f values are also predicted. The low-frequency dielectric temperature spectra and direct current pulse charge/discharge tests show that the low-loss Mgn+1TinO3n+1 ceramics can be good candidates for microwave capacitors even when operated under high-temperature conditions.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Guangyu Zhang,Feng Sun,Jian Zhao,Bing Sun,Wei Xu,Zhe Yang
The rational design of emergency relief systems for butene-1 polymerization processes is significantly complicated by the high viscosity characteristic of these systems. This study systematically investigates the runaway reaction dynamics and relief characteristics associated with butene-1 polymerization. The findings indicate that the pressure relief associated with the polymerization runaway of butene-1 is characteristic of a high-viscosity, two-phase flow vapor system. Based on the results of closed-cell tests, the venting sizing is determined for the pressure release of butene-1 polymerization plant that produces 50,000 tons annually. However, detailed relief simulation studies reveal that the release phase of butene-1 polymerization systems encounters challenges due to polymer precipitation. This precipitation can lead to blockages within the discharge line, consequently reducing the system`s release capacity. Our analysis demonstrates that maintaining pressure buffering during the relief phase facilitates the flash vaporization of butene-1 monomer within the reactor, significantly mitigating polymer discharge. To address the issues arising from polymer precipitation, we strongly recommend the implementation of a dual-valve control mechanism, comprising a rupture disc and a safety valve, alongside a reduction in the discharge pipeline length. The outcome of this research provides a dependable solution for the rational design of emergency relief systems tailored to high-viscosity polymerization systems, specifically addressing the challenges posed by polymer precipitation that can obstruct discharge pipelines.
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ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2024
·
IF 6.2
Wenmiao He,Zhiwei Liu,Hongchao Zhang,Qian Liu,Zhenkun Weng,Dongmei Wang,Wenhui Guo,Jin Xu,Dayong Wang,Zhaoyan Jiang,Aihua Gu
Bisphenol S (BPS) is widely presented and affects aging with unclear mechanisms. Here, we applied C. elegans to evaluate the effects of BPS on lifespan and healthspan and to investigate the underlying mechanisms. Both early-life and whole-life exposure to BPS at environmentally relevant doses (0.6, 6, 60 μg/L) significantly decreased lifespan, and healthspan (body bend, pharyngeal pumping, and lipofuscin accumulation). BPS exposure impaired mitochondrial structure and function, which promoted ROS production to induce oxidative stress. Furthermore, BPS increased expressions of the insulin/IGF-like signaling (IIS). Also, BPS inhibited expression of the IIS transcription factor daf-16 and its downstream anti-oxidative genes. Quercetin effectively improved BPS-induced oxidative stress byreversing BPS-regulated IIS/ daf-16 pathway and anti-oxidative gene expressions. In daf-2 and daf-16 mutants, the effects of BPS and quercetin on lifespan, healthspan, oxidative stress, and anti-oxidative genes expressions were reversed, demonstrating the requirement of IIS/ daf-16 for aging regulation. Molecular docking and molecular dynamics simulations confirmed the stable interaction between DAF-2 and BPS mainly via three residues (VAL1260, GLU1329, and MET1395), which was attenuated by quercetin. Our results highlighted that adverse effects of BPS on impairing lifespan and healthspan by affecting IIS/ daf-16 function against mitochondrial stress, which could be inhibited by quercetin treatment. Thus, we first revealed the underlying mechanisms of BPS-induced aging and the potential treatment.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Wei Chen,Pengfei Wang,Weike Jia,Huidan Zeng
Silicalite-1 zeolites/polymer composite membranes are among the most reliable materials for the pervaporation separation of m-X from xylene isomers. However, the separation factors of the present silicalite-1 zeolites/polymer composite membrane are low. This work has succeeded in fabricating dense and defect-free silicalite-1/PVA composite membrane for first improving the pervaporation separation performance of m-X/p-X isomers. The silicalite-1/PVA composite membrane was prepared by combining solution scraping and vacuum thermal crosslinking methods with fumaric acid as a crosslinker (denoted as silicalite-1/PVA-V). The silicalite-1/PVA-V composite membrane with a thickness of 15.3 μm, prepared with a fumaric acid/monomeric unit of PVA molar ratio of 0.05 after vacuum thermal crosslinking at 160 ℃ for 2 h, exhibited dense and defect-free structure with extremely low xylene swelling degree, good structural stability and mechanical properties as well as excellent pervaporation separation performance. Compared to the pure PVA membrane, the silicalite-1/PVA-V composite membrane exhibited better selective separation performance of m-X isomer. The temperature, amount of fumaric acid, crosslinking degree and membrane thickness significantly influenced the pervaporation separation performance. The optimum selective separation factor of m-X/p-X isomers and the corresponding total permeate flux were about 9.85 and 59.15 g·m −2 ·h −1 (60 ℃), respectively. The pervaporation experiments of long-time and repetitively prepared membrane demonstrated that the silicalite-1/PVA-V composite membrane had long-term structural stability and reproducibility. To demonstrate scalability, we showed that our strategy could produce large-size silicalite-1/PVA-V composite membrane with an area of 1000 cm 2 , which exhibited m-X separation performance similar to that of small membrane coupons. The present work provided a potentially scalable method for producing high-quality silicalite-1/PVA composite membrane for enhancing the pervaporation separation performance of m-X from xylene isomers.
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ANALYST
·
2011
·Vol. 136
·期 22
·4770-4773
·
IF 3.913
Ling Chen,Tingting Lou,Chunwei Yu,Qi Kang,Lingxin Chen
An approach for mercury ions (Hg2+) sensing based on the Hg2+-induced aggregation of thymine (T)–SH-functionalized gold nanoparticles (AuNPs) has been reported. The T–SH ligands that we synthesized can easily be coupled to the surface of AuNPs through the Au–S bond and can recognize Hg2+ with high selectivity by forming a T–Hg–T complex with strong affinity. For the T–SH-functionalized AuNPs (T–S-AuNPs) sensor, upon addition of Hg2+, the formation of the T–Hg–T complex induces aggregation of T–S-AuNPs and results in a significant change of color and UV-Vis absorption spectra. Thus, our method can be used for the rapid, easy and reliable screening of Hg2+ in aqueous solution, with high sensitivity (2.8 nM) and selectivity over competing analytes. The developed method is successfully applied to the sensing of Hg2+ in real environmental samples.
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危险品化学品经营许可证（带存储）