ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Xiaoli Xu,Guorong Sun,Mengyu Wang,Hongtao Jiang,Wei Ma,Wangwang Liu,Zhihong Jin,Jiamin Zhu,Guoqing Chang,Shuyi Ma
Overcoming the persistent challenges of high operating temperatures and poor selectivity in metal oxide semiconductor (MOS) gas sensors, this work enhances defect sites in the sensing material through heterostructure construction and builds mesoporous architectures using MOF-derived carbon skeletons as templates. The synergistic effects of multiple mechanisms significantly improve gas-sensing performance, successfully fabricating a ZnO/PCS flexible room-temperature gas sensor with exceptional room-temperature DMF detection capabilities. The nitrogen-containing porous carbon skeletons (PCSs) template shows a stable mesoporous microstructure with large pore volume. Further gas-sensitive investigations show that the ZnO/PCS flexible sensor presents high sensitivity (100 ppm of DMF, 68.06%), reduced response/recovery time (44 s/45 s), and low limit of detection (15.74 ppb) at room temperature (RT). In addition, the response decreases by only 5.65% after 200 bends, which proves the good flexible stability of the sensor. It is worth noting that hydrophobic PCSs also contribute to the good moisture resistance of the ZnO/PCS FRT sensor. The composite of ZnO and PCS porous carbon skeleton forms heterogeneous interfaces. The resulting ZnO/PCS heterostructure achieves remarkable characteristics: an ultrahigh specific surface area (214.86 m2 g–1), abundant oxygen vacancies (66.06%), and nitrogen-facilitated electron transfer-collectively enabling superior surface redox activity upon gas exposure. This work verifies a possible and facile strategy for the realization of FRT sensing metal oxide semiconductors by using MOF-derived PCSs, which may have great application potential in the field of flexible RT sensors.
研究领域:
材料科学
·
传感器技术
·
纳米材料
·
表面化学
·
环境监测
·
柔性电子学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Zhichao Yang,Weiquan Cai,Jinpeng Zhou,Qing Xia,Tielin Wang
A fast, large-scale, and stable preparation method was successfully developed to obtain η-Al2O3 microspheres with particle sizes of 3–10 μm from cheap and widely sourced NaAlO2 solution using N,N-dimethylformamide (DMF) as a morphological modifier and a precipitant simultaneously at room temperature. The yield of alumina increases from 33.3 to 77.3% by increasing the dose of DMF from 100 to 400 mL. The utilization efficiency of DMF significantly increased by adding fresh NaAlO2 into the reused filtrate after separating the bayerite precipitate (precursor of η-Al2O3). Importantly, the η-Al2O3 microspheres obtained from the filtrate-reuse experiments show the stable phase structures, morphologies, and pore structure properties. Furthermore, the typical η-Al2O3 microspheres supported Pd catalyst presents a higher catalytic activity of 10.6 g/L for the hydrogenation of anthraquinone than that of the commercial γ-Al2O3-supported Pd catalyst (8.5 g/L), suggesting that the as-prepared η-Al2O3 microspheres have good application prospects for catalytic hydrogenation and related fields.
研究领域:
材料科学
·
催化
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2026
·
IF 3.2
Jianan Liu,Xiangning Chen,Jiandi Huang,Menghan Li
DMF-CH 3 OH solvothermal mixed solvent. • High capacitance value of 2495 F/g at 1 A/g. • Capacitance value 175 F/g at 1 A/g of the ASC device. • Energy density of 54.3 Wh·kg −1 at power density of 744.5 W kg −1 of ASC device. Metal-organic frameworks (MOFs) have attracted great research attention as electrode materials for supercapacitors due to their unique advantages. In this work, a series of NiCo-MOFs were synthesized through a simple solvothermal method. This work mainly adopts DMF and methanol as the mixed solvent in the solvothermal process. By adjusting the ratio of DMF to methanol (1:1-4:1), NiCo-MOFs with similar morphologies but different electrochemical properties were obtained. Among the four solvent ratios, NiCo 21 -MOF (DMF:CH 3 OH = 2:1) exhibits excellent electrochemical performance with a specific capacitance of 2495 F/g at 1 A/g. The NiCo 21 -MOF//AC asymmetric supercapacitor (ASC) device exhibits a specific capacitance of 175 F/g at 1 A/g, and the energy density and power density are 54 Wh kg −1 and 744 W kg −1 , respectively. After 5000 cycles, the ASC device still retains 85% of its initial capacitance, with good stability. In conclusion, this work achieves excellent electrochemical performance of NiCo-MOFs by adjusting the solvent ratio, providing a new strategy for synthesizing NiCo-MOFs with excellent electrochemical properties. Download: Download high-res image (313KB) Download: Download full-size image
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DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Sha Li,Yuan Yang,Yisong Hu,Jialing Tang,Xiaochang C. Wang
Due to the issues of high energy consumption, high carbon emissions, and low resource and energy recovery, there is an urgent need to develop new paradigms for simultaneous wastewater treatment and resource utilization using physicochemical processes rather than conventional biological means. Recently, direct membrane filtration of municipal wastewater using ultrafiltration/microfiltration technology was proposed and showed satisfactory performance, with high membrane costs and fast membrane fouling as the main limitations. In this study, a novel two-stage powdered activated carbondynamic membrane filtration (PAC-DMF) system was developed using PAC as a carrier to enhance DM formation and organic pollutant retention. The particle size and dosage of PAC, strategy for operating the continuous reactor in the first stage, and selection of the PAC particle size in the second stage were investigated. The effluent from the first stage was found to have a stable water quality, with turbidity in the range of 50–70 NTU. Efficient retention of organic materials was also achieved with a retention rate of 74%–82%, and the COD content in the concentrate was above 3,000 mg/L in the cycle filtration experiment. In the second stage, further enhancement of water quality and organics retention were observed, as evidenced by the low effluent COD (<70 mg/L) and turbidity (5–20 NTU). Meanwhile, the effluent that was rich in nitrogen and phosphorus was suitable for agricultural irrigation or gardening. The results indicated that the developed two-stage PAC-DMF system could be a highly promising alternative to the conventional wastewater treatment process.
研究领域:
环境工程
·
水处理技术
·
膜科学
·
可持续资源管理
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2015
·
IF 5.056
Song Zhao,Wentao Yan,Mengqi Shi,Zhi Wang,Jixiao Wang,Shichang Wang
A new approach for fabricating polyethersulfone (PES)/ZnO ultrafiltration membrane is demonstrated. Nano-ZnO coated with polyvinylpyrrolidone (PVP) was prepared using dimethylformamide (DMF) as the solvent. The obtained ZnO-DMF dispersion was blended as an additive to fabricate PES/ZnO membranes with wet phase separation. The structure and performance of PES/ZnO membranes were characterized by the evaluation of surface pore size, porosity, water contact angle, pure water flux, BSA rejection and filtration resistance. The overall effect of ZnO-DMF dispersion addition on the structure and performance of the membrane was investigated by contrast with pure PES membrane. Compared with a pure PES membrane, PES/ZnO membranes have higher surface pore size, pore density and porosity, as well as improved surface hydrophilicity. The water fluxes of PES/ZnO membranes increased by approximately 210% compared with the pure PES membrane, with little change in BSA rejection. Besides, PES/ZnO membranes were also fabricated with different ZnO-DMF dispersions comprising a fixed content of PVP and different contents of nano-ZnO. The concrete contribution of nano-ZnO in ZnO-DMF dispersion on improving membrane performance was investigated by comparison with PES/PVP membrane. The results indicated that the incorporated nano-ZnO was favorable to the improvement of compaction resistance and antifouling property. The thermal stability of the PES/ZnO membranes was also improved compared to that of PES membrane.
研究领域:
材料科学
·
环境工程
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产品关联
DOI
高影响因子
COMBUSTION AND FLAME
·
2022
·
IF 5.767
Jinhu Liang,Ruining He,Shijie Zheng,Fei Li,Yang Li,Jônatas Vicente,Amir Antônio Martins de Oliveira,Amir De Toni,Xin Bai,Xuebin Wang,Qian Yan
A new chemical kinetic mechanism of DMF (N, N-dimethylformamide) is proposed. To assess the reliability of the mechanism, high pressure shock tube, single pulse shock tube and constant volume reactor were used to experimentally evaluate ignition delay times, high temperature pyrolysis , and laminar flame speeds of DMF, respectively. Ignition delay times of DMF/ “air” were measured for equivalence ratios of 0.5, 1.0, and 2.0, pressures of 2.0 and 10.0 bar, and temperature ranging from 900 to 1430 K. Additionally, ignition delay times of DMF/acetone/air were measured for equivalence ratios of 0.5 and 1.0, pressures of 2.0 and 10.0 bar, and temperature ranging from 900 to 1430 K. High temperature pyrolysis products of DMF/acetone mixtures, diluted in argon, were studied at 5.0 bar, temperatures between 1000 and 1600 K. Flame speed measurements of DMF/air were obtained for pressures of 100 and 200 kPa, temperatures of 398, 423, and 448 K, and equivalence ratios from 0.7 to 1.4. Simultaneously, a chemical kinetics mechanism was developed to simulate the experimental results using ChemKin Pro, with sensitivity and flux analysis being carried out to elucidate limitations and possible refinements.
研究领域:
化学动力学
·
燃烧科学
·
物理化学
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产品关联
DOI
高影响因子
ChemSusChem
·
2025
·
IF 6.6
Umar Farooq,Boyang Han,Usman Ali Shah,Fa Yang,Sheng Li,Yanping Song,Ali Hassan,Zhengquan Li,Jin Wang
The efficiency of earth-abundant kesterite Cu2ZnSn(S,Se)4 (CZTSSe) solar cells has been lagging behind the Shockley-Queisser limit primarily due to the presence of deep-level defects. These deep-level defects cause critical issues such as short carrier diffusion length, significant band tailing, and a large open-circuit voltage (VOC) deficit, ultimately leading to low device efficiency. To address these issues, we propose a post-fabrication defect healing strategy by dip-coating the CZTSSe film in dimethylformamide (DMF) solvent. Immersing the absorber layer in DMF (a polar solvent), neutralizes CuSn antisite defects through chemical bonding and facilitates the formation of a dense, smooth CZTSSe film with larger grain size. Deep-level transient spectroscopy revealed a remarkable increase in carrier diffusion length from 93 nm (control device) to 142 nm (champion device), confirming the beneficial effect of solvent-assisted post-treatment on mitigating CuSn antisite defects. The reduction in defect densities led to a decrease in VOC deficit by up to 289 mV, accompanied by an increased champion device efficiency of 11.4%. This work highlights the huge potential of the DMF post-treatment strategy for defect healing in CZTSSe solar cells.
研究领域:
材料科学
·
能源工程
·
半导体物理
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2026
·Vol. 16
·期 3
·2652
·
IF 4.6
Yongjian Pan,Shancai Guo,Teng Wang,Jianyuan Lin,Zhijian Jia,Fuhang Xu,Renyue Huang,Haili Wang,Chunjie Bai,Jianghua Chen
Nitrogen and sulfur co-doped carbon quantum dots (N,S-CQDs) were synthesized via a green, one-step hydrothermal method using waste lemon peel as the carbon source and glutathione (GSH) as the N,S dopant in a dimethylformamide (DMF) medium. The reaction was conducted at 180 °C for 10 hours to achieve efficient synthesis. The resulting N,S-CQDs showed excellent water dispersibility, strong photostability, and bright fluorescence, with optimal excitation and emission wavelengths of 340 nm and 420 nm, respectively. High-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FT-IR) confirmed their uniform morphology and successful incorporation of nitrogen and sulfur heteroatoms. Notably, the fluorescence of the N,S-CQDs could be rapidly and selectively quenched by Hg 2+ within 10 minutes at room temperature, without requiring any additional surface modification of the CQDs or auxiliary reagents in the sensing procedure. Under optimized conditions, the sensor exhibited a linear fluorescence quenching response to Hg 2+ over the concentration range of 17.6 nM to 20 µM ( R 2 = 0.9899), with a low detection limit of 17.6 nM. Mechanistic studies suggested that the quenching primarily resulted from the formation of nonfluorescent complexes between Hg 2+ and functional groups on the CQD surface. The developed sensor was successfully applied to detect trace levels of Hg 2+ in real lake water samples collected near textile manufacturing sites, demonstrating its potential as a sustainable, rapid, and cost-effective tool for practical environmental mercury monitoring. Nitrogen and sulfur co-doped carbon quantum dots (N,S-CQDs) were synthesized via a green, one-step hydrothermal method using waste lemon peel as the carbon source and glutathione (GSH) as the N,S dopant in a dimethylformamide (DMF) medium.
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产品关联
DOI
PubMed
高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2017
·Vol. 33
·期 1
·242-248
·
IF 0.767
GAO Yi-Fen,ZHUANG Gui-Lin,BAI Jia-Qi,ZHONG Xing,WANG Jian-Guo
Anovel four-fold interpenetrating metal-organic framework (MOF) (1) was obtained following reaction between Zn2+ and benzene-1,3,5-tribenzoate (H3BTB). Single crystal analysis demonstrated that the framework featured a three-dimensional (10, 3) net anionic
framework with dimethyl formamide (DMF) and H2NMe2
+ encapsulated in channels along the b axis. Alternating current impedance measurements revealed an unusual temperature-dependent conductance. As the temperature was increased from 20°C the conductance
value increased from 0.36×10-6 S·cm-1 to a maximum value of 2.24×10-5 S·cm-1 at 160°C, and then began to decrease. A combination of molecular dynamics (MD) simulations and dielectric property measurements demonstrated
that this conductance behavior could be attributed to the synergic effect of the enhanced mobility of the H2NMe2
+ cation and removal of DMF as the temperature was increased. Furthermore, the transporting energy barrier was determined to be 0.20 eV, which confirmed
that the conductance was caused by proton conductivity. This work indicated that the confinement of H2NMe2
+ within the pores of MOFs is a promising method to induce electrical conductivity. Interestingly, the emission peak of 1 was blue-shifted when
compared with that of H3BTB. Density functional theory (DFT) calculations revealed that this phenomenon was caused by the disruption of delocalized π-bonds within the BTB3- ligand in 1.
研究领域:
材料科学
·
物理化学
✓ 已验证
DOI
高影响因子
ChemNanoMat
·
2019
·Vol. 6
·期 2
·258-266
·
IF 3.431
Yunwei Wei,Ruijia Sun,Yuehua Li,Yuhai Zhang,Yizhong Lu,Xiaoming Li,Guozhu Chen,Bingqiang Cao,Cuncheng Li,Haibo Zeng
The preparation of luminescent Cs 4 PbBr 6 perovskite solids with current methods either needs a complex procedure, or needs a variety of ligands, and a combination of good solvents and anti-solvents. The potential environmental risks are inevitable when they are produced in large scale. Herein, an environmentally friendly route for the mass production of luminescent Cs 4 PbBr 6 perovskite solids using a single solvent under ambient conditions is presented. Gram-scale Cs 4 PbBr 6 perovskite solids are produced within tens of minutes using a small amount of DMF, specifically, 4 mL DMF solution can produce over 10 g products per batch. Because no ligands and anti-solvents are utilized in the whole procedures, the ligand-free Cs 4 PbBr 6 perovskite solids are facilely harvested after the evaporation of solvent. More importantly, the solvent vapor can be recovered and reutilized, which can eliminate the environmental pollution caused by organic solvent. The experimental results revealed that the solvent, reaction time, and PbBr 2 /CsBr molar ratios are crucial for the formation of Cs 4 PbBr 6 perovskite solids and their luminescent performances. Such Cs 4 PbBr 6 perovskite solids exhibit strong green PL emission, high PL quantum yield and reversible fluorescent response towards heat and light, which enable them to be suitable for applications in optoelectronic devices.
研究领域:
材料科学
·
化学
·
纳米技术
·
环境科学
✓ 已验证
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Kaiwei Wang,Hao Ruan,Fumin Wang,Yi Zhai,Mingshuai Sun,Yan Chen,Jiaxing Zhang,Yihao Wang,Xuyang Zou,Xubin Zhang
The construction of abundant TiO 6 active sites within the zeolite framework is essential for further enhancing the catalytic performance of TS-1 zeolite. Here, we employ a strategy involving treatment with a mixture of amines and ammonium salts to generate abundant TiO 6 species within zeolites synthesized with the assistance of N,N-dimethylformamide (DMF). It was observed that during the post-treatment process, the presence of amines and ammonium salts plays a key role for the formation of highly active TiO 6 species. The incorporation of DMF can significantly enhance the TiO 6 content in the post-treated zeolite, increasing it to 61.5 % compared with 28.5 % in the zeolite synthesized without DMF. The effect of the DMF/SiO 2 ratio in the synthesized gel on the morphology and catalytic performance was also examined. It is noteworthy that the incorporation of DMF influences the microenvironment of the Ti active sites following post-treatment. 1 H MAS NMR analysis reveals that the characteristic peaks corresponding to Ti-OH and isolated Si-OH groups in the DMF-synthesized catalyst are significantly intensified after treatment with amines and ammonium salts. When H 2 O 2 is employed as an oxidant, the optimal catalytic performance achieves a cyclohexene conversion of 51.1 % and a cyclohexene oxide yield of 39.4 %, with a high TOF value of 92.77 h −1 . Notably, the catalyst exhibits a significantly conversion rate of 79.4 % and a yield of 72.7 % using O 2 as the oxidant.
研究领域:
催化化学
·
材料科学
·
无机化学
·
石油化工
·
绿色氧化
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产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2023
·
IF 4.3
Guojing Xiao,Xinxin Ji,Jie Ji,Guangyao Li,Guang Yang,Ying Wang
In this work, a novel Schiff base chemodosimeter ( 2 ) based on salicylaldehyde containing a cyano group ( 1 ) and trometamol was designed and synthesized, which has a large Stokes shift (>100 nm) and remarkable solvatochromism. Compound 2 could be utilized as a sensitive fluorescent probe that quantitatively detects the water content in MeOH, MeCN, and DMF in a superwide continuous range and with a low detection limit, accompanied by a fluorescence color change from blue to green. The response range was 0–80% v/v for MeOH, 0–98% v/v for MeCN, and 0–90% v/v for DMF, and the detection limits were 0.0621% v/v (MeOH), 0.0327% v/v (MeCN) and 0.0910% v/v (DMF), respectively. Meanwhile, UV–Vis, IR, 1 H NMR, and MS characterization methods were used to investigate the mechanism. The results showed that water induced the breaking of the C N bond of 2 and the structural transition between alcohol and ketone of 1 . In addition, 2 was successfully loaded onto the test paper for the detection of water in the solid phase.
研究领域:
分析化学
·
材料科学
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产品关联
DOI
高影响因子
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