Journal of CO2 Utilization
·
2023
·
IF 7.7
Shibo Yuan,Peng Bai,Yi He,Jiafa Chen,Yicheng Zhao,Yongdan Li
Photocatalytic N-formylation of amines with CO 2 is a promising strategy to convert CO 2 into value-added chemicals sustainably. In this work, a black TiO 2 -supported Cu photocatalyst is prepared through a solvothermal method for the N-formylation of N-methylaniline with NaBH 4 as the reducing agent. Cu nanoparticles and oxygen vacancies are formed on the surface of the photocatalyst after reduction with H 2 , which decreases the band-gap energy and promotes the separation of photogenerated electrons and holes, thereby improving the photocatalytic activity remarkably. A 100 % conversion is achieved after 9 h radiation, and the yield of N -methylformanilide reaches 81 %. Both the amount of NaBH 4 and the pressure of CO 2 show important influences on the activity and selectivity of the photocatalytic process, and the carbon and hydrogen in the aldehyde group are from CO 2 and NaBH 4 , respectively. The photocatalyst also shows promising cycling durability.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Chuanbo Hu,Ying Li,Tingzhen Li,Yongquan Qing,Jianting Tang,Huawei Yin,Lei Hu,Lei Zhang,Yongsheng Xie,Kangning Ren
In this investigation, a comparative study on the anticorrosion properties of poly( N -methylaniline) (PNMA) coating, as well as PNMA-ZnO and PNMA/SiC-ZnO bilayer coatings, was carried out. The polymeric materials (PNMA and PNMA/SiC composite) were synthesized by emulsion polymerization method. The structures of the obtained polymeric materials were determined by different optic techniques, and the electrochemical activity and stability were examined by cyclic voltammetry . Subsequently, PNMA was spread on the surfaces of carbon steel and ZnO coating by chemical deposition method, and PNMA/SiC was spread on the surface of ZnO coating, which led to obtaining PNMA coating, PNMA-ZnO and PNMA/SiC-ZnO bilayer coatings. The structures of ZnO coating were characterized by X-ray diffraction and energy dispersive spectrometer, and the surface morphologies of all the coatings were also studied by field emission scanning electron microscopy . The anticorrosion properties of all the coatings were evaluated by electrochemical corrosion and accelerated immersion in the presence of a 3.5% NaCl solution. The results demonstrated that the polymeric materials-ZnO bilayer coatings had excellent corrosion protection ability, and in specific, for the carbon steel protected by PNMA/SiC-ZnO bilayer coatings it was higher than PNMA-ZnO bilayer coatings, with a corrosion rate of 0.004 mm/year and the protection efficiency was up to 97.43%. Overall, this study proves that the rough ZnO coating is beneficial to the embedding and pinning of polymeric materials, and the formed PNMA/SiC-ZnO bilayer coatings possess a strong adsorption ability and wide coverage area to the carbon steel substrate, which facilitates the external PNMA/SiC film to develop its unique barrier and passivation effects to prevent carbon steel from being corroded. The protection mechanism conferred by polymeric materials-ZnO bilayer coatings has also been discussed.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Li Li,Feng Xu,Ge Sun,Mingrui Sun,Shoushi Jia,Hongmei Li,Tao Xu,Honglian Zhang,Yan Wang,Yue Guo,Taohua Liu
The objective of this study was to establish a novel method for the determination of N-methylaniline (NMA) based on azo coupling reaction in infant pacifiers prepared with food contact silicone materials by combining thin layer chromatography (TLC) with surface-enhanced resonance Raman scattering (SERRS). TLC was used to separate the azo reaction products to confirm the component spot of azo compound, then the spot of azo compound mixed with silver sol on the TLC plate was qualitatively detected by SERRS. The limit of detection (LOD) of the method is as low as 0.50 ppm for NMA. The influence of sample matrix about the TLC-SERRS detection of NMA was investigated by experiment of simulated positive sample, and the NMA in infant pacifiers exposed to silica gel products was detected. The method of TLC-SERRS for the determination of NMA in infant pacifiers prepared with food contact silicone materials was established, and the real samples were detected. Compared with the methods ever reported, the method has the advantages of high sensitivity, specificity and low cost. It provides a new reference method for establishing a safety system for food contact silicone materials.
研究领域:
分析化学
·
食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Chenyang Shi,Bo Hong,Xueya Zhang,Qian Xiang,Zhian Zhang,Kai Zhang,Jing Fang,Yanqing Lai
Lithium-sulfur batteries are considered to be the most promising high-energy-density storage system, yet the dissolution of polysulfides during the charging process limits the utilization, and cycle stability of active materials, which affects the practical application of lithium-sulfur batteries. Herein, a poly( N -methylaniline) (PMAn) coating film is formed in situ on the cathode surface by electrochemically polymerizing the monomer of N -methylaniline(MAn) contained in the electrolyte during film formation process. The PMAn coating film on the surface of the cathode can prevent the dissolution of polysulfide, then reduce the loss of active material, and slow the oxidation of polysulfide by lithium nitrate , resulting in improved cycle stability. As a result, the lithium-sulfur battery with 0.5 wt% MAn render an initial discharge specific capacity of 1224 mAh/g and a capacity retention of 63.79% for 200 cycles, which is better than the performance of the battery without MAn.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2026
·
IF 12.2
Yixin Huang,Yihui Zhang,Mengzhe Zhao,Shuwen Yan,Weihua Song
The peroxyacetyl radical [CH3C(O)O2•, PAR] is a highly selective oxidant that plays a critical role in peracetic acid (PAA)-based advanced oxidation processes (AOPs). The kinetic and mechanisms of PAR reactions with dissolved organic matter (DOM), a major sink and reactive matrix in natural waters, have been poorly understood. In this study, we quantitatively characterized the reactivity of PAR toward diverse DOM isolates using a competitive kinetic method. The second-order rate constants between PAR and DOM isolates (kPAR,DOM) were determined, ranging from (4.0 ± 0.2) × 101 to (4.0 ± 0.2) × 102 L mgC–1 s–1 at pH 7.3. Our results demonstrated that phenolic moieties are the dominant PAR-reactive sites in DOM. The measured kPAR,DOM values correlated strongly with bulk DOM properties, including the phenolic content, electron-donating capacity (EDC), and optical E2/E3, enabling empirical prediction of DOM reactivity toward PAR. Beyond quenching, DOM exhibited dual effects on PAR-mediated contaminant oxidation. Anilines or phenols with an electron-drawing group (e.g., −CN and −Cl) were inhibited through back reduction of their radical cations by DOM, while those with an electron-donating group (e.g., −CH3) were promoted through secondary oxidation by reactive DOM-derived intermediates (RIsDOM). These findings establish the first comprehensive kinetic framework for PAR–DOM reactions in aquatic environments.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOMASS & BIOENERGY
·
2026
·
IF 7
Ge-liang Xie,Yu Luo,Kai-cheng Xia,Sheng-ren Li,Lujiang Xu,Zhen Fang
Aromatic amines, particularly aniline derivatives, serve as pivotal intermediates in the manufacture of dyes, pharmaceuticals, and polymers. However, their conventional synthesis remains heavily reliant on fossil feedstocks and frequently employs toxic reagents. The valorization of lignin presents a promising, renewable pathway to these valuable compounds, yet the reactivity of lignin-derived phenols varies markedly depending on their functional group substituents. Herein, a pronounced "promotion-inhibition dichotomy" is reported. Alkyl substituents substantially enhance reactivity-achieving a 44.3 mol% yield of aromatic amines from 4-propylphenol, representing a 34.7% increase over phenol. Conversely, methoxy groups exert a strong inhibitory effect in limiting the yield of aromatic amines from 4-propylguaiacol to only 11.0 mol%. Furthermore, Mo-Ga/HZSM-5 catalyst employed under NH 3 -H 2 atmosphere effectively doubled the yield of aromatic amines to 25.9 mol%. A sequential hydrodeoxygenation-amination strategy is further devised, boosting the yield to 34.1 mol%. Notably, by integrating this two-step strategy with a lignin-first biorefining approach, a 16.6 mol% of aromatic amines (based on lignin) could be achieved from birch. This study elucidates key reactivity principles in lignin valorization and demonstrates an integrated strategy that advances the sustainable production of aromatic amines from renewable biomass.
✓ 已验证
产品关联
DOI
高影响因子
Foods
·
2026
·Vol. 15
·期 4
·753
·
IF 6
Meilin Zhao,Zhihua Huang,Shuoyang Sun,Quan Gan,Shuang Wu,Xiqi Hu,Delei Xu,Pedro Laborda,Bao Tang,Lingtian Wu
Phytophthora capsici , an invasive oomycete pathogen causing blight in crops like cucurbits, tomatoes, and peppers, has led to significant economic losses. Due to the limitations of conventional control methods, research has focused on effective and eco-friendly biocontrol alternatives. The bacterial strain LT-22, identified as Bacillus velezensis , exhibits broad-spectrum antifungal activity and plant growth-promoting potential. This study investigated the biocontrol efficacy of volatile organic compounds (VOCs) from strain LT-22. LT-22 VOCs strongly inhibited P. capsici PC153 growth in vitro and reduced disease symptoms in pepper fruits. Microscopic observations showed that LT-22 VOCs caused significant morphological changes in P. capsici PC153 mycelium by disrupting cell wall and membrane integrity. The treatment increased malondialdehyde (MDA) levels and reduced cellulose content, further indicating that LT-22 VOCs compromise cell integrity to exert antifungal effects. Furthermore, 2-methylbutanoic acid was identified as the primary antifungal VOC, with an EC 50 value of 0.095 µL/mL against P. capsici PC153, lower than the reported plant-derived compounds. Together, these results indicate that strain LT-22 and its VOCs, especially 2-methylbutanoic acid, have significant potential as an effective biocontrol agent for managing Phytophthora blight.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2015
·
IF 4.513
Youhong Ai,Faqiong Zhao,Baizhao Zeng
A novel proton-type ionic liquid doped polyaniline (HIL-doped PANI) coating was presented, which was prepared on a stainless steel wire by electrodeposition in an aqueous solution containing aniline and 1-sulfobutyl-3-methylimidazolium hydrosulfate. The HIL-doped PANI coating showed granular nanostructure and had large specific surface. When it was applied to the headspace solid-phase microextraction of several amines (i.e., aniline, N -methylaniline, 3-methylaniline, 2-chloroaniline and 3-chloroaniline), it showed high extraction efficiency. The enrichment factors were 191.8–343.9 for different amines, much higher than those of common PANI and commercial polydimethylsiloxane/divinylbenzene coatings. Coupled with gas chromatographic analysis, the linear ranges were 0.097–100 μg/L with correlation coefficients above 0.9942, and the detection limits were 0.012–0.048 μg/L (S/N = 3) for different amines. The relative standard deviations (RSD) were smaller than 8.1% for five successive measurements with single fiber and the fiber-to-fiber RSDs were 8.6–13.8% ( n = 5) for these amines. The proposed method was successfully applied to the extraction and determination of amines in organic waste water samples, and the recoveries were 78.3–112.8% for different analytes.
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of the American Chemical Society
·
2025
·
IF 15.6
Jianxiang Wu,Yuxin Chen,Wei Du,Yaming Hao,Shaoyan Wang,Ran Wang,Shuangshuang Cha,Xuejing Yang,Chang Yan,Cheng Lian,Honglai Liu,Ming Gong
The electrode/electrolyte interfacial structure is a seminal component that governs the activity of electrocatalytic water splitting, providing alternative approaches to electrocatalyst design. Herein, we demonstrate that a dense interface constituting of zwitterionic betaine could selectively accelerate the alkaline oxygen evolution reaction (OER) by 2 orders of magnitude in current. The hygroscopic betaine molecules not only bind water molecules strongly but also endow the underhydrated characteristics of the hydroxide anions that increase their activity coefficient. The underhydrated hydroxide anions can also be enriched within the inner Helmholtz plane, which forms the mixed hydroxide anion-betaine adsorbate layer that significantly increases the effective potential that drives the OER. This interface can further segregate the reactive zones to selectively promote hydroxide oxidation and retard the oxidative polymerization of neutral anilines for improving the durability by at least an order of magnitude, creating new possibilities for impure water electrolysis.
研究领域:
电化学
·
催化
·
材料科学
·
表面科学
·
能量转换
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOMASS & BIOENERGY
·
2026
·
IF 7
Linlin Li,Jiang Zhao,Qingmei Ge,Yin-Hui Huang,Hang Cong,Wenfeng Zhao
Converting CO 2 into value-added chemicals using sustainable, biomass-derived catalytic systems is a key strategy for carbon mitigation and resource utilization. In this study, a heterogeneous biomass-derived zwitterionic polymer was fabricated from chitosan for CO 2 cycloaddition and N-methylation reactions. The synthesized porous bio-based polymer exhibits a robust structure and exceptional CO 2 adsorption capacity, leading to high catalytic efficiency. Under mild conditions, this catalyst achieved yields of up to 95% for 8 cyclic carbonates and 99% for 10 N-methylamines. Furthermore, the chitosan-based polymer demonstrates remarkable stability, maintaining its activity over at least 6 reuse cycles without significant degradation. Mechanistic studies indicate that the inherent –NH 2 or –OH groups on chitosan facilitate CO 2 and epoxide activation, while the zwitterionic structure provides active sites for ring-opening and cyclization processes.
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2021
·
IF 3.882
Chaoyue Xiong,Guodong Xue,Lijun Mao,Lianghong Gu,Chao He,Yonghao Zheng,Dongsheng Wang
Understanding the relationship between chemical structure and photoswitching property of donor–acceptor Stenhouse adducts (DASAs) is necessary for developments and applications of the novel photoresponsive molecule. In the current work, we demonstrated a close relationship between the length of carbon spacer and photoswitching property of DASAs. A series of DASAs with barbituric acid substituted electron-withdrawing part and N-methylaniline substituted electron-donating part were synthesized. With shortening the carbon spacer between the phenyl and amine groups in the electron-donating part, the efficiency and rate of the light-induced linear-to-cyclic isomerization are improved in all the test solvents. The molecular energy variation during the isomerization process was investigated by density functional theory calculation to further understand the mechanism. This work provides a reliable carbon spacer strategy to control the photoswitching behavior of DASAs using chemical methods.
研究领域:
有机化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
GREEN CHEMISTRY
·
2018
·Vol. 21
·期 3
·567-577
·
IF 8.586
Wenfeng Zhao,Xiaoping Chi,Hu Li,Jian He,Jingxuan Long,Yufei Xu,Song Yang
Catalytic fixation of CO2 to produce valuable fine chemicals is of great significance to develop a green and sustainable circulation of excessive carbon in the environment. Herein, a series of non-toxic, biodegradable and recyclable acetylcholine-carboxylate bio-ionic liquids with different cations and anions were simply synthesized for producing formamides and methylamines using atmospheric CO2 as a carbon source, and phenylsilane as a hydrogen donor. The selectivity toward products was tuned by altering the reaction temperature under solvent or solvent-free conditions. N-Methylamines (ca. 96% yield) were obtained in acetonitrile at 50 °C, while N-formamides (ca. 99% yield) were attained without a solvent at 30 °C. The established bio-ionic liquid catalytic system found a wide range of applicability in substrates and possessed a high potentiality in scale-up to gram-grade production. The developed catalytic system was fairly stable, which could be easily reused without an apparent loss of reactivity, possibly due to the strong electrostatic interactions between the cation and anion. The combination of experimental and computational results explicitly elucidated the reaction mechanism: PhSiH3 activated by a bio-IL was favorable for the formation of silyl formate from hydrosilylation of CO2, followed by a reaction with an amine to give an N-formamide, while an N-methylamine was formed by further hydrosilylation of the N-formamide.
研究领域:
绿色化学
·
环境科学
·
有机化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）