MACROMOLECULES
·
2014
·
IF 5.927
Shaofei Wu,Yao Liu,Guipeng Yu,Jianguo Guan,Chunyue Pan,Yong Du,Xiang Xiong,Zhonggang Wang
A consolidated ionothermal strategy was developed for the polymerization of thermally unstable nitriles to construct high performance materials with permanent porosity, and carbazole, dibenzofuran, and dibenzothiophene were separately introduced into covalent triazine-based networks to investigate the effects of heterocycles on the gas adsorption performance. Three nitriles, namely 3,6-dicyanocarbazole, 3,6-dicyanodibenzofuran, and 3,6-dicyanodibenzothiophene, were designed and synthesized, which were readily converted to heat-resistant intermediates at a moderate temperature and then polymerized to create highly porous poly(triazine) networks instead of the traditional one-step procedure. This documents an improved strategy for the successful construction of heterocyclic-functional triazine-based materials. The chemical structures of monomers and polymers were confirmed by 1H NMR, FTIR, and elemental analysis. Such polymers with high physical–chemical stability and comparable BET surface areas can uptake 1.44 wt % H2 at 77 K/1 bar and 14.0 wt % CO2 at 273 K/1 bar and present a high selectivity for gas adsorption of CO2 (CO2/N2 ideal selectivity up to 45 at 273K/1.0 bar). The nitrogen- and oxygen-rich characteristics of carbazole and dibenzofuran feature the networks strong affinity for CO2 and thereby high CO2 adsorption capacity. This also helps to thoroughly understand the influence of pore structure and chemical composition on the adsorption properties of small gas molecules.
研究领域:
材料化学
·
物理化学
·
多孔材料
·
气体吸附与分离
·
功能高分子
·
能源材料
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Quan Wang,Jinyu Huang,Jiaxi Zhou,Zhenhua Liu,Youfu Geng,Zhiqiang Liang,Yu Du,Xiaoqing Tian
By varying different solvents, WO 3 nanoparticles, nanorods, and nanoflakes were synthesized via facile solvothermal processes without structure-directing agent. The as-prepared products were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and nitrogen adsorption–desorption measurements. The effect of the polarity of organic solvents used in the synthesis procedure on the morphologies of as-synthesized WO 3 materials was proposed. Gas sensors based on the synthesized products were fabricated and their gas sensing properties were tested towards a variety of target gases. The results indicated that the sensor based on WO 3 nanoparticles exhibited excellent selectivity, better response and recovery behavior and much higher sensitivity toward Cl 2 compared to those based on WO 3 nanorods, and nanoflakes, although three samples have similar specific surface areas. These characteristics are suggested to arise from good crystallinity and high concentration of oxygen vacancy on the surface of WO 3 nanoparticles.
研究领域:
材料科学
·
纳米科技
·
传感器技术
·
无机化学
·
表面科学
✓ 已验证
DOI
高影响因子
Nanoscale
·
2012
·Vol. 4
·期 23
·7585-7592
·
IF 5.914
Xianfeng Wang,Jialin Wang,Yang Si,Bin Ding,Jianyong Yu,Gang Sun,Wenjing Luo,Gang Zheng
This work describes the detection of trace hydrogen chloride (HCl) gas through analyses of the resonance frequency signal from quartz crystal microbalance (QCM) sensors coated with polyaniline (PANI) functionalized polyamide 6 (PA 6) (PANI-PA 6) nanofiber-net-binary (NNB) structured membranes. The PA 6 NNB substrate comprising nanofibers and spider-web-like nano-nets fabricated by a versatile electro-spinning/netting (ESN) process offered an ideal interface for the uniform PANI functionalization and enhanced sensing performance. Benefiting from the large specific surface area, high porosity, and strong adhesive force to the QCM electrode of the PANI-PA 6 NNB membranes, the developed HCl-selective sensors exhibited a rapid response, good reproducibility and stability, and low detection limit (7 ppb) at room temperature. Additionally, the PANI-PA 6 NNB sensing membranes presented visible color changes upon cycled exposure to HCl and ammonia, suggesting their potential application in the development of colorimetric sensors. The PANI-PA 6 NNB coated QCM sensors are considered to be a promising candidate for trace HCl gas detection in practical applications.
研究领域:
分析化学
·
传感器技术
·
材料科学
·
环境监测
·
气体传感
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Yuting Zhang,Qian Sun,Bizi Yu,Weiwang Lim,Ayan Yao,Jingcheng Du,Yumo Fan,Xuan Ding,Daijun Meng,Wen He,Ji Ma,Jian Guan,Hongjun Zhang,Jiangtao Liu
Mixed matrix membranes (MMMs) incorporating metal-organic frameworks (MOFs) hold great promise for energy-efficient carbon capture, yet are fundamentally limited by interfacial defects and the ubiquitous permeability-selectivity trade-off. Herein, we propose a nanoconfinement strategy via in-situ interfacial polymerization to synthesize ultrathin MOF nanosheets and thus integrate them into PIM-1 matrix, a typical representative of polymers of intrinsic microporosity (PIMs), crafting a defect-free membrane. The meticulously designed MOFs, featuring synergistic amino functionalities and unsaturated Cu 2+ sites, endows the optimal membrane (PIM-MOF-1%) with exceptional CO 2 affinity and tailored molecular-sieving pathways. Consequently, it achieves a remarkable combination of high CO 2 permeability (5186 barrer) and CO 2 /N 2 selectivity (41), surpassing the 2019 Robeson upper bound. Impressively, this superiority persists under harsh conditions-exceeding the 2008 Robeson upper bound at 80 °C and sustaining high performance at 15 bar. Moreover, the membrane demonstrates exceptional long-term durability, preserving excellent separation performance, with CO 2 permeability of 3078 barrer and CO 2 /N 2 selectivity of 46, even after 180 days of aging. Our strategy aligns nanoconfined MOF architectures with polymer matrix, thereby resolving critical challenges in carbon capture through the simultaneous enhancement of separation efficiency and durability.
✓ 已验证
产品关联
DOI
高影响因子
SURFACE AND INTERFACE ANALYSIS
·
2026
·
IF 2.7
Yiqi Zheng,Mingchao Zheng,Jianfeng Lan,Xiaoying Li,Tong Lou,Bo Wu,Xianhui Zhang,Jiangfan Chang
Natural gas pipelines face severe corrosion and hydrate deposition. Superhydrophobic coatings have potential but suffer from poor mechanical durability. Herein, a dopamine modification strategy is proposed, in which dopamine self-polymerizes on nano-ZnO to form a polydopamine (PDA) layer, improving epoxy compatibility and adhesion, thereby enhancing mechanical robustness and cohesion. A superhydrophobic coating (DZn) was fabricated by incorporating PDA-modified nano-ZnO into epoxy resin. DZn showed a water contact angle of 153.85° and a hysteresis of 3.11°. After 30 abrasion cycles, DZn retained its hydrophobicity, indicating excellent mechanical durability. DZn also achieved the highest adhesion grade (5B) and retained fouling-release capability under both acidic (pH = 1) and alkaline (pH = 13) conditions. EIS confirmed enhanced corrosion resistance, with an R c value of 9.18 × 10 9 Ω · cm 2 after 50 days of immersion, significantly higher than the control. This sustained R c indicates long-term stability of the trapped air layer, crucial for inhibiting hydrate nucleation and adhesion. This study demonstrates that dopamine modification effectively improves superhydrophobic coating performance, showing strong potential for internal pipeline protection against corrosion and hydrate deposition.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Xinyu Wang,Min Deng,Jia Song,Jiaxue Li,Lu Yao,Lin Yang,Wenju Jiang,Junfeng Zheng,Zhongde Dai
The development of high-efficiency carbon molecular sieve (CMS) membranes critically relies on precise control of ultramicroporous structures for efficient gas separation. In this study, cyclodextrins (CDs) with distinct molecular cavity sizes (α-, β-, and γ-CD) are employed as molecular-scale regulators to direct the evolution of pore structures in polyimide (PI)-derived CMS membranes through controlled pyrolysis. By systematically varying CD cavity sizes, the packing behavior of PI chains and the subsequent carbonization shrinkage are effectively regulated, leading to differentiated ultramicropore size distributions. This cavity-size-dependent pore engineering strategy enables a clear correlation among the molecular structure of CDs, carbon microstructure evolution, and gas transport behavior. Consequently, resulting hybrid CMS membranes exhibit substantially enhanced separation properties compared with both their precursors and pristine PI-derived CMS membranes, with optimized membranes carbonized at 550 °C going beyond the Robeson upper bounds for CO2/N2, CO2/CH4, H2/N2, and H2/CH4 separations. Particularly, γ-CD-derived CMS membranes achieve a favorable balance between permeability (PCO2 = 12186.6 Barrer, PH2 = 16314.1 Barrer) and selectivity (αCO2/N2 = 35.5, αCO2/CH4 = 41.7, αH2/N2 = 46.6, αH2/CH4 = 54.9), accompanied by stable long-term performance. These findings confirm that cyclodextrins’ incorporation with different cavity sizes provides an efficient approach to tailor the pore architecture of CMS membranes toward enhanced gas separation performance.
✓ 已验证
DOI
高影响因子
STAR Protocols
·
2026
·Vol. 7
·期 3
·104823
·
IF 1.4
Shu He,Bingxue Cao,Xinyi Zhang,Yabin Liu,Yongheng Zhang,Haowen Guo,Xingchun Zhai,Min Zhang
Summary Spatiotemporal encoding constructs drift-tolerant artificial-olfaction systems using a single sensing material. Here, we present a protocol for discriminating complex volatile organic compounds (VOCs) via this approach. We describe steps for hydrothermally synthesizing a porous CuP@G chemoresistive ink and laser-fabricating programmed micro-architectures. We then detail procedures for micro-cavity device assembly, spatiotemporal signal acquisition, and machine-learning interpretation. For complete details on the use and execution of this protocol, please refer to Zhai et al. 1
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·Vol. 143
·期 39
·e71244
·
IF 3.1
Jiangwei Zhao,Yunxiao Dong,Xiaofeng He,Jin Zhu,Jinggang Wang
The transition from fossil feedstocks to bio-based alternatives with tunable properties is a crucial step towards establishing a sustainable materials industry. In this study, a series of high molecular weight bio-based poly (pentamethylene- co -ethylene glycol 2,5-furandicarboxylate) (PPEF) copolyesters were successfully synthesized by the conventional melt polycondensation method from 2,5-furandicarboxylic acid and 1,5-pentanediol (PeDO) derived from biomass resource. The intrinsic viscosities [ η ] of PPEF copolyesters ranged from 0.70 to 0.84 dL/g with the number-average molecular weights ( M n ) ranging from 30,200 to 36,300 g/mol. The thermal stability, mechanical properties, and optical clarity of PPEF copolyesters were significantly improved with the increase in 1,5-pentanediol content. Among them, the elongation at break of PPEF-36 was as high as 182%, while maintaining a tensile modulus of up to 2350 MPa and a tensile strength of 75 MPa. In addition, PPEF copolyester demonstrated excellent gas barrier properties, with carbon dioxide and oxygen barrier improvement factors (BIFp) of 5.7–8.1 times and 3.1–5.5 times, respectively, compared with polyethylene terephthalate (PET). Therefore, bio-based PPEF copolyesters with high toughness and excellent gas barrier properties will demonstrate significant application potential in food and medical packaging as well as specialized industrial sectors.
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·
IF 15.7
Du Qinqing,Liu Lingyan,Sun Shengtong,Wu Peiyi
Self-adaptive compliance and gas permeability are crucial properties for on-skin electronics, enabling the reliable extraction of high-fidelity electrophysiological signals for applications in personal healthcare and robotic control. However, integrating these two properties into a single device, particularly under dynamic skin deformations, remains a significant challenge. Here, we present an ultrathin liquid crystal elastomer-based sheath-core ionic nanomesh that synergizes soft elasticity with ionic conductivity to create self-compliant and breathable bioelectronic interfaces. The nanomesh features a hydrophilic sheath and a porous architecture, which ensure high moisture and air permeability for superior wearable comfort. Moreover, the unique liquid-like deformation of liquid crystal directors facilitates nearly stress-free skin-device junctions, promoting fatigue-resistant adhesion against various interfacial failures. Our fabricated electrodes successfully acquire muscle-specific electromyography signals with minimized motion artifacts - a feat challenging for conventional epidermal electrodes. This design resolves the trade-off between self-compliance and permeability, establishing a new paradigm for long-term, reliable wearable electronics.
研究领域:
可穿戴电子学
·
生物医学工程
·
柔性机器人
·
生物电子学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhihua Zhao,Yang Dong,Xianghao Meng,Peijuan Wu,Jichao Wang
The present work focuses on developing a high-performance n-butanol detection system through heterojunction engineering of W 18 O 49 /CeO 2 nanocomposites, aiming to achieve superior sensitivity and selectivity in volatile organic compound monitoring. The solvothermal-mediated fabrication of CeO 2 nanocrystals served as the foundation for hierarchical assembly of the W 18 O 49 /CeO 2 heterostructured sensing layer. A comprehensive investigation was organized, encompassing discriminative selectivity analysis, durability testing, response profiling, response/recovery characterization under prolonged operational conditions. Experiment confirmed that the W 18 O 49 /CeO 2 heterojunction sensor achieved peak analytical performance at room temperature, exhibiting a response of 12.2 when exposed with 100 ppm n-butanol. In contrast, the pristine W 18 O 49 had a response of 2.6, and pristine CeO 2 showed negligible response. DFT results showed that the adsorption energy of n-butanol on the W 18 O 49 /CeO 2 composite was −1.092 eV, which was much stronger than that on pristine W 18 O 49 (−0.305 eV), indicating a more favorable adsorption process. Notably, the sensor achieved a detection threshold of 1 ppm n-butanol with a response magnitude reaching 23.5 %, indicating its capability for ultra-trace gas analysis. Collectively, these findings substantiate the W 18 O 49 /CeO 2 heterojunction architecture as a highly effective sensing platform for volatile organic compound (VOC) detection, with particular applicability to n-butanol gas monitoring in smart manufacturing environments. The superior sensing efficacy stems from the synergistic charge transfer mechanism at the heterointerface, validated by both experimental characterization and theoretical modeling.
研究领域:
材料科学
·
气体传感技术
·
纳米材料
·
环境监测
·
化学传感
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF MASS SPECTROMETRY
·
2016
·
IF 1.011
Shanshan Wang,Guohua Zhu,Mengmeng Chen,Jinsong Liu,Kezhi Jiang
p-Chloroaniline is one of the banned aromatic amines in azo dyes, but it is very difficult to distinguish it from its isomers due to their identical retention time in chromatography and similar mass spectra. In this work, derivatization of the isomeric chloroanilines was carried out to yield the corresponding N-tosyl chloroanilines, which were completely separated by gas chromatography and also possessed clearly different electron ionization mass spectra. Thus, the three isomers could be differentiated and determined at the same time. Density functional theory calculation results indicated that the effect of the substituent pattern in electron ionization mass spectrometry is mainly due to the difference in the stability of the product ion (P2) at m/z 126, originating from the loss of tosyl radical from the precursor ion.
研究领域:
分析化学
·
染料工业
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Zhihua Liu,Dan Han,Lulu Liu,Donghui Li,Xiaomei Han,Yi Chen,Xiaoru Liu,Kai Zhuo,Yongqiang Cheng,Shengbo Sang
Two-dimensional (2D) transition metal carbides (MXene) have attracted great attention for device applications due to their unique structures and excellent properties, such as high electrical conductivity and abundant functional groups on the surface. However, gas sensors based on Ti 3 C 2 T x MXene have the problems of high detection limit and poor long-term stability. Herein, we report a simple method to prepare Ti 3 C 2 T x /Ti 3 AlC 2 planar composite gas sensing materials using high molar ratio of HCl and LiF with Ti 3 AlC 2 as a framework. The Ti 3 C 2 T x /Ti 3 AlC 2 planar composite gas sensor has a high sensitivity, good selectivity and low detection limit for NH 3 , which can detect 50 ppb (1.2%) at room temperature ((25 ± 2) ℃). Furthermore, the gas sensor has good repeatability and long-term stability. After 120 days, the response of the gas sensor to 500 ppb of NH 3 fluctuated little due to the Ti 3 AlC 2 as a framework. The superior performances can be attributed to the special heterojunction between Ti 3 C 2 T x and Ti 3 AlC 2 and the high proportion of -O and -OH functional groups on the surface of Ti 3 C 2 T x /Ti 3 AlC 2 composite. This study provides an important reference for the realization of high performance NH 3 sensing by Ti 3 C 2 T x .
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）