INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Kai Xu,Xuefeng Zhang,Ming Zhang,Lanhe Zhang,Zicheng Chen
The combination of highly hydrophilic plant fiber and water molecule sensitive material can effectively detect the water content in transformer oil. In this study, two types of rapid response cellulose colorimetric papers (Rp and Bp) were fabricated through a simple impregnation method, with cellulosic fiber serving as the substrate, cresol red/thymol blue as the color developer, boric acid as the pH regulator, and silica aerosol as the filler. Rp and Bp were tested and analyzed using various characterization methods, and their performance in detecting bound water content in transformer oil was investigated. The results indicate that Rp changes from magenta to light yellow and Bp changes from lavender to light yellow with the increase of water content of transformer oil. The water content detection accuracy of both is 92 % and 95 %, respectively. The rapid color change of them is due to boric acid's acidity triggering molecular structure changes in the color developers. After six cycles of use, Rp and Bp still exhibited excellent color-changing properties. Therefore, colorimetric papers have the attributes of rapidity, high efficiency, low cost, and desired accuracy, providing an alternative approach for evaluating transformer oil's water content and showing promising application potential.
研究领域:
材料科学
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分析化学
·
电气工程
·
高分子科学
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DOI
PubMed
高影响因子
Journal of Coatings Technology and Research
·
2021
·Vol. 18
·期 5
·1389-1399
·
IF 2.382
Yu Tingting,Cheng Liang,Cai Haocheng,Li Geng,Wang Xu,Kong Linghan,Zhan Jianbo,Wang Hao,Zhang Ying,Yu Zhenhua,Zheng Han
In this study, the fibrous mesoporous silica F-SiO 2 was functionalized with 3-aminopropyltriethoxysilane (APTES). The reversible thermochromic composites of fibrous mesoporous silica (F-SiO 2 ) and amino group-modified fibrous mesoporous silica (F-SiO 2 -NH 2 ) microspheres loaded with cresol red-boric acid (CR-BA) were termed as S2 (F-SiO 2 /CR-BA) and SN2 (F-SiO2-NH 2 /CR-BA), respectively. The materials obtained were characterized by infrared spectroscopy, transmission electron microscopy, scanning and transmission electron microscopy, differential scanning calorimetry, and thermogravimetric analysis. The fibrous morphology of this rigid carrier was maintained after loading with the CR-BA composite system. Owing to the APTES modification, the F-SiO 2 -NH 2 /CR-BA composites underwent more severe color changes than the F-SiO 2 /CR-BA composites. In addition, the F-SiO 2 -NH 2 /CR-BA composites can recover the original color in only 210 s, illustrating excellent reversibility.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 17
·12218-12224
·
IF 3.9
Duanyang Wu,Junxue Li,Jing Xu,Wei Cheng
Freezing has been reported to accelerate chemical reactions and thus affect the fate of pollutants in the environment. However, little research has been conducted on the potential effects of freezing on the chlorination process. This study aimed to explore the freezing-enhanced chlorination process by comparing the oxidation of clofibric acid (CA) by chlorine in ice (at −20 °C) to the same reaction in water (at 25 °C). The degradation of CA, which was negligible in water, was significantly accelerated in ice. This acceleration can be attributed to the freeze concentration effect that occurs during freezing, which excludes solutes such as chlorine, CA and protons from the ice crystals, leading to their accumulated concentration in the liquid brine. The increased concentration of chlorine and protons in the liquid brine leads to higher rates of CA oxidation, supporting the freeze concentration effect as the underlying cause for the accelerated chlorination of CA in ice. Moreover, the chlorine/freezing system was also effective in the degradation of other organic pollutants. This highlights the environmental relevance and significance of freezing-enhanced chlorination in cold regions, particularly for the treatment of organic contaminants.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Asmaa Gbiliy,Ibrahim Senosy,Marwa A.A. Saadan,Mahmoud Sayed,I.P.W.A.V. Kumara,Ge-Fei Hao,Man-Qun Wang
The biosynthesis of volatile organic compound (VOC) signaling is essential for plant adaptation under disease stress. However, the efficient identification of VOCs remains a significant challenge. In this study, we engineered a biomimetic colorimetric sensor array by integrating stimulus-responsive dyes into a highly porous three-dimensional covalent organic framework (3D COF), which is coupled with artificial intelligence analysis. These 3D COF@dye sensors exhibit high surface areas and interconnected large channels, facilitating highly sensitive colorimetric sensing of VOCs. The resultant platform demonstrated markedly enhanced sensitivity towards target VOCs, with detection limits ranging from 0.081 to 0.95 ppm. Furthermore, AI-assisted information fusion and perceptual analysis considerably improved the accuracy of VOC sensing processes, enabling direct visualization and classification of VOCs with ≥95% accuracy within 24 h of inoculation. This design, which leverages molecular recognition capabilities, amplifies host-guest interactions, thereby facilitating the differentiation of VOCs by their polarity, size, and shape. The platform effectively distinguished VOCs emitted by Botrytis cinerea , Alternaria solani , and Phytophthora infestans . Our findings provide a generalizable platform of intelligent, nano-enabled sensors for precision agriculture and non-invasive plant health monitoring.
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DOI
高影响因子
TALANTA
·
2015
·
IF 3.545
Wen Sun,Hui Li,Han Wang,Shan Xiao,Jihui Wang,Liang Feng
The sensitivity of pH indicators is always confined in acidic solvents used during the immobilization because of the large deviation from their color transition points. By regulating the pH of indicators using organic acid or base, the color transition points of indicators could be readily achieved and the sensitivity could be greatly enhanced. In this study, bromophenol blue was selected as an example to interpret this improvement. And Hue, Saturation and Value (HSV) color model was applied to obtain digital color information of pH indicators. In addition, other two kinds of pH indicators were chosen and regulated to their color transition points as well. The resultant indicators together with the original ones were composed to a colorimetric sensor array and utilized to determine fish freshness. Compared with the original indicators, much higher sensitivity in the detection of fish freshness was obtained by the pH regulated indicators.
研究领域:
食品科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Rongrong Dai,Bingyan Zhou,Jingwen Zeng,Pengle Qian,Yadong Sun,Yingtang Zhou,Zheng Guo
A dual-phase copper-doped iron oxide nanozyme (Cu-α/γFO) was synthesized via a facile hydrothermal method for efficient organic pollutant degradation. The as-prepared Cu-α/γFO exhibits excellent peroxidase-like activity, degrading 99.5% rhodamine B (RhB) under optimal conditions (pH 4, 40°C) while retaining 40.73% of its initial activity after three cycles. Critically, it demonstrates broad-spectrum catalytic efficacy, efficiently degrading diverse organic dyes (e.g., cresol red, methyl violet, methylene blue), and retains high catalytic activity even in complex environments containing coexisting cations (K⁺, Ca²⁺, Mg²⁺), anions (H₂PO₄⁻, HCO₃⁻, NO₃⁻), or organic solvents (acetone, ethyl acetate). X-ray diffraction (XRD) and Raman spectroscopy confirmed the Cu-doping-induced α/γ-Fe₂O₃ phase crystal structure, while minimal copper leaching after 21-day aqueous storage validated structural integrity. The mechanism of enhanced peroxidase-like activity of Cu-α/γFO was proposed based on integrated characterization, including electron spin resonance (ESR), electrochemical impedance spectroscopy (EIS), X-ray photoelectron spectroscopy (XPS), and density of states calculations. Degradation pathways were elucidated using high-performance liquid chromatography-mass spectrometry (HPLC-MS) identification of intermediates and theoretical calculations. This work presents a dual-phase engineering strategy through targeted metal doping, advancing high-performance nanozymes for sustainable environmental remediation.
研究领域:
环境催化
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纳米材料
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纳米酶
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水处理
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材料化学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Yucheng Liu,Hantao Du,Xu Huang,Mingming Yin,Hongtao Liu,Haoran Sun,Lizhang Wang
The treatment of high-salinity organic wastewater (HSOW) poses severe challenges, with sulfate ions (SO 4 2− ) playing a critical role in electrocatalytic oxidation processes. In this study, a series of Ti/RuO 2 -MO x electrodes were fabricated by coating composite metal oxides onto titanium substrates, and the SO 4 2− -mediated electron transfer mechanism on the electrode surface was elucidated. We reveal that surface metal atoms form M O S electron channels with SO 4 2− , facilitating direct electron transfer for organic oxidation. The oxidation state of metal ions exerts a significant regulatory effect on electron transfer processes. Specifically, composite formation with metal oxides (i.e., Sn 4+ , Ce 4+ , Mn 4+ ) exhibiting valence state matching with Ru 4+ optimizes surface electron distribution, expands electron channels, and enhances SO 4 2− adsorption stability, thereby exerting a positive promotional effect on electron transfer. Conversely, composite systems involving metal oxides with significant valence state discrepancies from Ru 4+ (i.e., Cu 2+/3+ , Co 2+/3+ , Fe 2+/3+ ) disrupt surface electron distribution, shrink electron channels, and reduce SO 4 2− adsorption stability, leading to impaired charge transfer kinetics. Notably, via the SO 4 2− -mediated electron transfer process, the Ti/RuO 2 -SnO 2 electrode with outstanding electron transfer properties achieved ultra-low energy consumption (0.0022 kwh‧g −1 ) degradation of organic pollutants, with a carbon footprint of 0.68 kg CO 2 ‧m −3 . This study provides novel insights for the ultra-low energy treatment of HSOW.
研究领域:
环境科学
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电化学
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废水处理
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材料科学
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产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Nan Wu,Lili Ren,Wei Song,Jian Xu,Li Zhang,Shuai Wang,Zeyu Wang,Qiancheng He,Qingzhu Zhang
The rapid advancement of smart agriculture has created a growing demand for innovative materials capable of real-time environmental monitoring. In this study, starch/carboxymethyl cellulose/cresol red (SCR, CMCCR, SCMCCR) composite films were developed using a casting method to explore the effects of pH-responsive reagents at 0.3 wt% content on the films' physicochemical properties. The SCMCCR film showed a 20.26 % reduction in thickness compared to the SCR film, while its density increased by 26.6 %. Mechanical testing revealed that the tensile strength improved by 17.38 %, and the elongation at break remained at 52.56 %. Notably, the SCMCCR film achieved a Young's modulus of 552.96 MPa, which is over 6 times higher than that of the CMCCR film and 23 times greater than that of the SCR film. Water solubility of 27.77 % and enhanced thermal stability, with a final residual content of 49.57 % at 600 °C, were observed for the SCMCCR film. Characterization by FT-IR, XRD, and SEM confirmed structural and morphological modifications. The films raw materials exhibited exceptional responsiveness to humidity variations and film demonstrated rapid and distinct color transitions from yellow to purple across specific pH value. The environmentally friendly composition, low cost, and high sensitivity of these films make them promising candidates for real-time soil pH monitoring.
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DOI
高影响因子
Communications Earth & Environment
·
2026
·
IF 9.3
Zhu Lang,Chen Na,Zou Rui,Ren Luyao,Xie Jia,Hao Zelin,Jiang Haoyang,Jia Hanzhong
Frozen regions sequester dissolved organic carbon (DOC) in ice, yet its transformation, especially coupled with other elements, remains unexplored. We found that freezing accelerated DOC transformation when coupled with nitrite, and the transformation pathway varies with carbon source. At pH 3.0, dissolved black carbon (DBC) underwent oxidative degradation with decreasing molecular weight and aromaticity, whereas leached DOC (LDOC) exhibited humification, increasing the humification index from 0.38 to 0.65. The difference arises from nitrite protonation to HNO 2 and NO + under the strongly acidic conditions induced by the freeze concentration effect. HNO 2 amplified the oxidative capacity of H 2 O 2 for DBC decomposition, where H 2 O 2 concentration in the DBC system was 6.9-fold higher than LDOC. However, NO + converts electron-rich phenols within LDOC (2.65-fold higher than DBC) into phenyl radicals, triggering polymerization to humus. These findings reveal different nitrite-induced DOC turnover during freezing, providing valuable insights into carbon source-sink dynamics during carbon-nitrogen coupling in ice. The alternative text for this image may have been generated using AI.
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DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·10894
·
IF 15.7
Wang Shiyu,Zhou Ying,Zhao Wenchang,Li Yanhong,Tang Shuxian,Si Ting,Zhu Pingan
Directional droplet motion on solid surfaces, governed by Gibbs’ theory of minimizing surface free energy, traditionally relies on static surface gradients. However, such approaches face intrinsic constraints, including fixed transport directions and interdependence between transport distance and speed. Here, we introduce shape-evolving microfiber rails (SEMRs) that enable spontaneous droplet transport on initially non-gradient surfaces. Inspired by a domino-like mechanism, the SEMRs dynamically generate cascading gradients through shape deformations in response to droplet-surface interactions, diverging from conventional static-gradient designs. This adaptive strategy allows for steerable droplet motion, independent control over transport distance and velocity, and design flexibility for on-demand performance optimization. The SEMR’s versatility heralds advanced applications across analytical chemistry, cargo transport, electronics, and diagnostics, paving the way for advanced intelligent fluidic systems.
研究领域:
微流控
·
软材料
·
表面科学
·
流体力学
·
智能材料
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产品关联
DOI
PubMed
高影响因子
Environmental Chemistry Letters
·
2020
·Vol. 18
·期 6
·2127-2132
·
IF 5.922
Yang Jin,Cao Yan,Zhang Naidong
Water pollution by dyes is a major health and environmental issue. Photosensitive organic dyes produce hydrated electrons, e aq − , singlet oxygen, 1 O 2 , and superoxide anion radicals, O 2 · − . O 2 · − catalyzes H 2 O 2 transformation into hydroxyl radicals ·OH, which can be used to degrade wastewater under sunlight. Here, we measured e aq − , 1 O 2 , O 2 · − and ·OH generated under visible light irradiation of photosensitive organic dyes in the presence of the auxiliary Fe 3+ , the 1,5-diphenylcarbazide molecular probe, the NH 2 OH molecular probe and the dimethyl sulphoxide probe. Results show that single photosensitive organic dyes are not degraded in the visible light/H 2 O 2 system. However, they were degraded when mixed in a certain proportion to produce a brown coloration, a phenomenon named the ‘color-mixing effect.’ Likewise, the average yields of O 2 · − in single photosensitive organic dye solutions were lower, of 0.015 (Δ A 510 ), than that in mixed brown solutions, of 0.113. The color-mixing effect is explained mainly by higher ·OH generation from increased O 2 · − production. Findings imply that sunlight irradiation is a promising way to clean colorful and dye-containing wastewater.
研究领域:
环境科学
·
化学
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产品关联
DOI
高影响因子
Polymers
·
2019
·Vol. 11
·期 7
·1142
·
IF 3.164
Jianye Ji,Xin Ge,Xiaoyan Pang,Ruoling Liu,Shuyi Wen,Jiaqi Sun,Weijie Liang,Jianfang Ge,Xunjun Chen
Methoxyl-capped MQ silicone resin (MMQ) was first synthesized by the hydrosilylation of vinyl-containing MQ silicone resin and trimethoxysilane and then used in condensed room-temperature vulcanized (RTV) silicone rubber as a self-reinforced cross-linker. Results show that modified silicone rubber exhibits good light transmission. Compared with unmodified silicone rubber, the hardness, tensile strength and elongation of MMQ at the break are increased by 26.4 A, 2.68 MPa and 65.1%, respectively. In addition, the characteristic temperature of 10% mass loss is delayed from 353.5 °C to 477.1 °C, the temperature at maximum degradation rate is also delayed from 408.9 °C to 528.4 °C and the residual mass left at 800 °C is increased from 1.2% to 27.7%. These improved properties are assigned to the synergistic effect of the rigid structure of MMQ, the formation of a dense cross-linking structure in polymers and the uniform distribution of MMQ cross-linking agent in RTV silicone rubber.Keywords:cross-linker;MQ silicone resin;hydrosilylation;silicone rubber;modified
研究领域:
材料科学
·
化学工程
✓ 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）