Heliyon
·
2024
·
IF 3.4
Chenhan Lv,Haixiang Cheng,Rui Fan,Jingyu Sun,Xinghai Liu,Yinghui Ji
Organic fluorine compounds are acute carcinogenic and mutagenic to humans. Photoelectrocatalysis (PEC) treatment is an innovative technology in the field of the removal of fluorine compounds, and thus current research focused on improving stability and catalytic ability of photoanode. In this study, it has been synthesized a rGO/BiOI photocathode for the efficient degradation of 4-Fluoroaniline (4-FA). The physical characterization and photoelectrochemical properties of the photocathode was determined. The results indicate that the PEC treatment with the rGO/BiOI photocathode was more efficient compared with individual processes. During the optimization experiments, the PEC treatment achieved 99.58 % and 72.12 % of 4-FA degradation and defluorination within 1 h. Cyclic stability experiments show that rGO/BiOI photocathode was efficient and stable, which reached 96.91 % and 67.64 % of 4-FA degradation and defluorination after five cycles. Mechanism analysis indicates that the PEC process was based on an electrochemical reaction and photo-induced processes. The degradation product of 4-FA was mainly 2,4-di-t-butylphenol, and trapping experiments indicates that h + is the primary oxidizing species. Therefore, PEC treatment with rGO/BiOI photocathode is a competitive green approach to remove fluorine compounds pollutants and brings new insights into development of PEC treatment.
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Zhuowei Du,Zhu Ma,Tangjie Yu,Zhangfeng Huang,Wei You,Yi Chen,Junbo Yang,Hao Du,Qian Zhang,Yixian Li,Lihong Bai,Yanlin Li,Guoming Li,Shanyue Hou,Yan Xiang,Jian Yu,Cheng Huang,Kuan Sun,Wei Long
At present, the power conversion efficiency (PCE) of perovskite solar cells (PSCs) has reached 26.1%. Polycrystalline perovskite films prepared by sequential deposition are often accompanied by excess PbI2. Although excess PbI2 can reduce the internal defects of the perovskites and promote charge transfer, excess PbI2 is unevenly distributed in the perovskites and easily decomposed into the composite center of charge. Therefore, the growth and distribution of PbI2 crystals can be regulated by introducing 4-fluoroaniline (4-FLA) as an additive into the precursor of PbI2. We observe that the presence of an amino group in 4-FLA leads to a reduction in the strength of van der Waals forces between PbI2 layer structures, thereby facilitating the uniform dispersion of excess PbI2 within the perovskites. Additionally, 4-FLA is restricted from being embedded in the PbI2 layer due to the steric hindrance of 4-FLA and the hydrogen bond interaction between nitrogen atoms and PbI2. Therefore, it leads to better dispersion of PbI2, resulting in better passivation and device efficiency. Based on the hydrophobicity of the benzene ring, the modified perovskite film shows excellent hydrophobicity. Ultimately, we achieved 21.63% PCE and 1.16V VOC. This provides an effective strategy for regulating excess PbI2 to achieve efficient and stable PSCs.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2018
·
IF 2.955
Yajun Deng,Jipeng Chen,Xinmei Zhang,Fangfang Wei,Jinxin Zhang,Jinhuo Lin,Yanlian Xu
Corrosion resistant coatings based on eco-friendly and low-volatile organic compounds have received attention in recent years. In this work, the water-dispersible corrosion inhibitors were prepared from lignin, aniline, and 4-fluoroaniline. We achieved different polymer inhibitors with excellent optimum synergistic effects, and the resulting was shown that the excellent dispersion of inhibitors in deionized water were stable for 3 h, compared to polyaniline (PANI) after 10 min of storage. Then, those inhibitors subsequently composited into the natural lacquer to generate anti-corrosion coatings. As revealed by electrochemical measurements, including Tafel polarization curves and electrochemical impedance spectroscopy (EIS), the composite coatings were exhibited outstanding chemical properties in different corrosive medium. The resulting showed that the corrosion performance of composite lacquer coatings were remarkably improved compared with pure lacquer coating, especially L/PF-73-10 coating.
研究领域:
材料科学
·
腐蚀与防护
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DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Fengjun Chen,Yifen Xu,Aying Wang,Zhongxiang Xia,Lidong Zhang,Lixian Yin,Zhi Wang
Polybenzoxazine resins are a new type of high-performance thermosetting resins with excellent properties. However, their high curing temperature significantly limits their applications. In this study, precursor catalysts with high catalytic efficiency were prepared using different transition metal nitrates and acetylacetone. Leveraging the principle of the combustion synthesis method, we successfully reduced the curing temperature of benzoxazine while simultaneously enhancing its mechanical and anticorrosive properties. The results demonstrated that this approach lowered the initial curing temperature of fluorinated benzoxazines to below 100 °C and significantly improved their adhesion and hardness, achieving ratings of 5B and 6H, respectively. In addition, the impedance modulus of the Ga(NO 3 ) 3 /AcAcH/benzoxazine system reached 2.17 × 10 5 Ω cm −2 , while the In(NO 3 ) 3 /AcAcH/benzoxazine system exhibited an impedance modulus of 7.45 × 10 4 Ω cm −2 , significantly enhancing corrosion resistance compared to the pure benzoxazine coating. The In(NO 3 ) 3 /AcAcH/benzoxazine system ultimately formed a heterogeneous domain structure. In contrast, the Ga(NO 3 ) 3 /AcAcH/benzoxazine system resulted in a homogeneous domain structure with minimal free volume. This study presents a novel and efficient strategy for reducing the curing temperature and improving the mechanical performance of benzoxazine, offering a simple yet effective catalytic approach with potential for applications in anticorrosion coatings.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Wen Qin,Chengyuan Zheng,Haoming Qin,Yang Song,Yang Zhou,Jin Jiang,Jun Ma
Permanganate/electron shuttle systems for the enhanced transformation of anilines were evaluated. The presence of electron shuttles (2,2’-azino-bis(3-ethylbenzothiazoline)-6-sulfonate (ABTS), 1-hydroxybenzotriazole (HBT) and catechol (CAT) accelerated the oxidative transformation of aniline by Mn(VII). In the Mn(VII)/ABTS process, ABTS •+ was partially consumed through fragmentation or polymerization with aniline, while the second-order rate constants ( k app 2 , M −1 s −1 ) of the interaction of ABTS •+ with aniline rose from 86.57 to 140.04 M −1 s −1 with increase in pH from 5 to 8. In the Mn(VII)/HBT system, aniline removal was markedly enhanced under acidic conditions due to the formation of polymerized products via radical cations (HBT • ). Furthermore, the oxidative transformation of aniline (82.5 %) by Mn(VII)/CAT was significantly higher than that by Mn(VII) (65.2 %) because of Michael addition reaction of aniline and ortho-benzoquinone (o-BQ). Moreover, the formation of Mn(III) was confirmed by the overall oxidation state (3.13) and the X-ray Photoelectron Spectroscopy (XPS) spectra of the Mn products in the CAT/Mn(VII) process, revealing a synergistic mechanism between o-BQ and Mn(III) for enhanced aniline degradation.
研究领域:
环境科学
·
化学
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产品关联
DOI
PubMed
高影响因子
ACS Catalysis
·
2024
·
IF 11.3
Yunjia Wei,Dexiang Chen,Xingce Fan,Xiao Tang,Lei Yao,Xing Zhao,Qiang Li,Jiawei Wang,Teng Qiu,Qi Hao
The Suzuki–Miyaura coupling reaction is an efficient organic method for synthesizing biphenyl products. However, its conventional reliance on toxic soluble organometallic palladium catalysts or expensive palladium nanoparticles, along with the need for elevated temperatures and prolonged reaction times, presents a significant challenge. Herein, we demonstrate a palladium-free approach using plasmonic silver nanoparticles that enables the Suzuki–Miyaura coupling reaction to proceed at room temperature under visible light. Utilizing the surface-enhanced Raman scattering characteristics of silver, we conducted dynamic self-monitoring of the reaction. Our findings reveal that this plasmon-induced Suzuki–Miyaura coupling reaction fundamentally operates as a heterogeneous reaction involving coupling between radicals, distinct from conventional palladium-based reactions. Moreover, the cleavage of C–Cl and C–B bonds, fundamental prerequisite to the coupling, is driven by plasmonic hot electrons and plasmon-induced reactive oxygen species, respectively. These findings not only provide insights into the design and regulation of plasmonic catalysts but also enhance theoretical understanding of the Suzuki–Miyaura reaction in a broader context.
研究领域:
化学
·
材料科学
·
光催化
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产品关联
DOI
高影响因子
C-Journal of Carbon Research
·
2024
·Vol. 10
·期 3
·62
·
IF 3.9
Xuexin Yuan,Qiqi Zhou,Yu Chen,Hai-Jian Yang,Qingqing Jiang,Juncheng Hu,Cun-Yue Guo
In the present work, inexpensive and commercially available diethyltriamine pentaacetic acid (DTPA) was used as an initiator to catalyze the N-formylation reaction of CO2with amines via the construction of C-N bonds in the presence of xanthone as the photosensitizer and PhSiH3as the reducing agent. After a systematic study of various factors, the optimal conditions for the photocatalytic reaction were obtained: 2.5 mmol of amine, 2.5 mmol of PhSiH3, 10 mol% of DTPA, 20 mol% of xanthone, 1 mL of dimethylsulfoxide (DMSO), atmospheric pressure, and 35 W UV lamp irradiation for 48 h. Under the optimal conditions, the catalyst system afforded high performance for the N-formylation of amines (primary and secondary amines) and CO2, and the yields of the N-formylated products of dialkylamines were above 70%. Further studies exhibit that the catalytic system has a wide scope of substrate applications. For various alicyclic secondary amines, heterocyclic secondary amines, aliphatic primary amines, and aromatic primary amines, the corresponding N-formylation products can be obtained efficiently. In addition, the catalyst can be recycled by simple precipitation and filtration. After five cycles of recycling, there was no significant change in the catalytic and structural properties of DTPA. Finally, a possible reaction mechanism is proposed.
研究领域:
化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2020
·
IF 4.192
Shichao Xu,Xiaojing Zeng,Songlin Dai,Jing Wang,Yuxiang Chen,Jie Song,Yunfei Shi,Xian Cheng,Shengliang Liao,Zhendong Zhao
In this study, we will report on the synthesis and application of efficient botanical agrochemicals from turpentine for sustainable crop protection. Two series of turpentine derived secondary amines were synthesized and identified by FT-IR, 1H NMR, 13C NMR, and HRMS. The herbicidal activities against Echinochloa crus-galli were evaluated. The potential toxicity of the synthesized compounds was tested by MTT cytotoxicity analysis. The effect of structure of the synthesized secondary amines and corresponding Schiff base compounds on their activities was investigated by quantitative structure–activity relationship (QSAR) study. All target products were found to be low toxicity, with similar or higher herbicidal activities than commercial herbicides diuron and Glyphosate. Results of QSAR study showed that a best four-descriptor QSAR model with R2 of 0.880 and Rloo2 of 0.818 was obtained. The four descriptors most relevant to the herbicidal activities are the min valency of a N atom, the max total interaction for a C−H bond, the relative number of aromatic bonds, and the min partial charge (Qmin).
研究领域:
农业化学
·
植物科学
·
药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2016
·
IF 4.035
Li-Shun Zhang,Qing-Li Zhao,Xin-Xin Li,Xi-Xi Li,Yan-Ping Huang,Zhao-Sheng Liu
A hybrid monolith incorporated with mesoporous molecular sieve MCM-41 of uniform pore structure and high surface area was prepared with binary green porogens in the first time. With a mixture of room temperature ionic liquids and deep eutectic solvents as porogens, MCM-41 was modified with 3-(trimethoxysilyl) propyl methacrylate (γ-MPS) and the resulting MCM-41-MPS was incorporated into poly (BMA-co-EDMA) monoliths covalently. Because of good dispersibility of MCM-41-MPS in the green solvent-based polymerization system, high permeability and homogeneity for the resultant hybrid monolithic columns was achieved. The MCM-41-MPS grafted monolith was characterized by scanning electron microscopy, energy dispersive spectrometer area scanning, transmission electron microscopy, FT-IR spectra and nitrogen adsorption tests. Chromatographic performance of MCM-41-MPS grafted monolith was characterized by separating small molecules in capillary electrochromatography , including phenol series, naphthyl substitutes, aniline series and alkyl benzenes. The maximum column efficiency of MCM-41-MPS grafted monolith reached 209,000 plates/m, which was twice higher than the corresponding MCM-41-MPS free monolith. Moreover, successful separation of non-steroidal anti-inflammatory drugs and polycyclic aromatic hydrocarbons demonstrated the capacity in broad-spectrum application of the MCM-41-MPS incorporated monolith. The results indicated that green synthesis using room temperature ionic liquid and deep eutectic solvents is an effective method to prepare molecular sieve-incorporated monolithic column.
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 CHROMATOGRAPHY A
·
2016
·
IF 3.926
Li-Shun Zhang,Pei-Yao Du,Wen Gu,Qing-Li Zhao,Yan-Ping Huang,Zhao-Sheng Liu
A new lanthanide metal-organic frameworks NKU-1 have successfully incorporated into poly (BMA- co -EDMA) monolith and evaluated by capillary electrochromatography (CEC). Lanthanide metal-organic frameworks [Eu 2 (ABTC) 1.5 (H 2 O) 3 (DMA)] (NKU-1) were synthesized by self-assembly of Eu(III) ions and 3,3′,5,5′-azo benzene tetracarboxylic acid ligands have been fabricated into poly(BMA- co -EDMA) monoliths. 1-Butyl-3-methylimidazolium tetrafluoroborate and N , N -dimethylformamide were developed as binary porogen obtaining homogeneous dispersibility for NKU-1 and high permeability for monolithic column. The successful incorporation of NKU-1 into poly(BMA- co -EDMA) was confirmed and characterized by FT-IR spectra, scanning electron microscopy, X-ray diffraction, energy dispersive spectrometer area scanning, and transmission electron microscopy. Separation ability of the NKU-1-poly (BMA- co -EDMA) monoliths was demonstrated by separating four groups of analytes in CEC, including alkylbenzenes, polycyclic aromatic hydrocarbon, aniline series and naphthyl substitutes. Compared with bare monolithic (column efficiency of 100,000 plates/m), the NKU-1-poly (BMA- co -EDMA) monoliths have displayed greater column efficiency (maximum 210,000 plates/m) and higher permeability, as well as less peak tailing. The results showed that the NKU-1-poly (BMA- co -EDMA) monoliths are promising stationary phases for CEC separations.
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
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Tianfang Yang,Ye Chen,Miao Tian,Xupo Liu,Fengxian Zhang,Jing Zhang,Kun Wang,Shuyan Gao
ABSTRACT Heteroatom doping is considered as an effective approach that manipulates the local bonding environment to improve the electroactivity of Fe-N/C catalysts. Herein, the oxidation polymerization-pyrolysis approach is applied to fabricate the uniformly F-doped porous Fe-N/C catalysts (F-FeNC) through utilizing 4-fluoroaniline as a “self-doping” precursor with N and F elements simultaneously. The synergistic effect between ligand trapping and long-range interaction of F atoms provides high density of Fe-N x active sites. The F-FeNC catalyst demonstrates superior ORR performance in alkaline media with a positive half-wave potential ( E 1/2 ) of 0.82 V, low H 2 O 2 yield of ∼3.4% and rapid 4e − transfer process. The liquid-state Zn-air battery (ZAB) assembled with F-FeNC catalyst as air cathode delivers excellent rate capability, power density (141 mW cm −2 ), specific capacity (760 mAh g − 1 ) and long-term cycle durability over 120 h. Moreover, the as-assembled all-solid-state ZAB shows excellent cycle stability at 0°∼180° bending conditions, revealing great prospects in flexible electronic device applications. Engineering the electronic structure of active sites via F self-doping provides an insightful route for designing multi-heteroatom doped Fe-N/C catalysts.
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 24
·2300526
·
IF 29.4
Zhuohua Dai,Guangfa Wang,Fangfang Xiao,Da Lei,Xincun Dou
Amorphous metal-based nanostructures have attracted great attention recently due to their facilitative electron transfer and abundant reactive sites, whereas it remains enigmatic as to whether amorphous copper-based nanoparticles (CuNPs) can be achieved. Here, for synthesizing amorphous CuNPs, glutathione is adopted as a ligand to inhibit the nucleation and crystallization process via its electrostatic repulsion. By subtly tailoring the solvent polarity, not only can amorphous glutathione-functionalized CuNPs (GSH-CuNPs) with phosphorescent performance be achieved after transferring the non-conjugation of GSH ligand to through-space conjugation, namely clusterization-triggered emission, but also the phosphorescence-off of GSH-CuNPs toward 2,4,6-trinitrotoluene (TNT) can be realized by the photoinduced electron-transfer process through the hydrogen bond channel, which is established between carboxyl and amino groups of GSH-CuNPs with the nitryl group of TNT. Benefitting from the intrinsic superiorities of the amorphous CuNPs, desired phosphorescence and detection performances of GSH-CuNPs toward airborne TNT microparticulates are undoubtedly realized, including high quantum yield (13.22%), excellent specificity in 33 potential interferents, instantaneous response, and ultralow detection limit (1.56 pg). The present GSH-CuNPs are expected to stretch amorphous metal-based nanostructures and deepen the insights into amorphous materials for optical detection.
研究领域:
材料科学
·
光学检测
·
纳米技术
✓ 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）