CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Hanhan Zhao,Wenjun Jiang,Yinhua Ma,Liubin Pei,Jiayu An,Su Zhan,Feng Zhou
The inherent electron-hole recombination, low light-absorption capacity and poor selectivity of photocatalysts hinder the production efficiency of hydrogen peroxide (H 2 O 2 ), necessitating the development of a catalyst with high catalytic activity. In this study, a supramolecular self-assembly method was employed to prepare 4-aminobenzonitrile-modified carbon nitride (Abz-CN). The incorporation of the cyano group rendered the charge distribution of Abz-CN inhomogeneous, leading to an increased dipole moment. This enhancement facilitated the separation and migration of photoinduced carriers. Additionally, density functional theory (DFT) calculations revealed that Abz-CN had a higher propensity for oxygen adsorption and the formation of *OOH intermediates compared to carbon nitride (BCN). The H 2 O 2 generation rate of Abz-CN reached 3866 μmol·g −1 ·h −1 (under a 180 W xenon lamp, λ > 400 nm), which was 5.2 times that of BCN. Furthermore, the mechanism of Abz-CN followed a sequential two-step single-electron oxygen reduction process. This study showcases an innovative approach for bolstering the efficiency of photocatalytic H 2 O 2 generation.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2024
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IF 5.7
Jiajia Qian,Chen Zhu,Jianlong Li,Yuhua Yang,Dachuan Gu,Yinyin Liao,Lanting Zeng,Ziyin Yang
Benzyl nitrile from tea plants attacked by various pests displays a diurnal pattern, which may be closely regulated by the endogenous circadian clock. However, the molecular mechanism by the circadian clock of tea plants that regulates the biosynthesis and release of volatiles remains unclear. In this study, the circadian clock gene CsPCL1 can activate both the expression of the benzyl nitrile biosynthesis-related gene CsCYP79 and the jasmonic acid signaling-related transcription factor CsMYC2 involved in upregulating CsCYP79 gene, thereby resulting in the accumulation and release of benzyl nitrile. Therefore, the anti-insect function of benzyl nitrile was explored in the laboratory. The application of slow-release beads of benzyl nitrile in tea plantations significantly reduced the number of tea geometrids and had positive effects on the yield of fresh tea leaves. These findings reveal the potential utility of herbivore-induced plant volatiles for the green control of pests in tea plantations.
研究领域:
植物科学
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分子生物学
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农业昆虫学
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植物生理学
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DOI
PubMed
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
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2024
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IF 2.8
Tong Jiale,Huang Yeyin,Tang Wanjun,You Qingliang,Xie Guangyong
This work aims at developing a customized ammoxidation catalyst through optimizing the metal oxide content in CrVO 4 /SiO 2 catalysts. Various amounts of Cr–V–O with 1:1 molar ratio of Cr/V were successfully loaded on SiO 2 via spray-drying method with colloidal silica as the binder. Polarized light microscope illustrated that the CrVO 4 /SiO 2 particles presented as well dispersed microspheres in the microsize (20–80 μm). X-ray diffraction spectra confirmed the formation of monoclinic CrVO 4 phase wherein the metal oxide content was ranged from 30 to 70 weight percent. FT-IR spectra indicated that the introduction of metal oxide had no obvious effects on the skeletal structure of SiO 2 . X-ray photoelectron spectroscopy analysis revealed that the valence state of V and Cr was hardly affected with increasing the metal oxide content. Performances of the obtained CrVO 4 /SiO 2 catalysts with different metal oxide contents were investigated via the ammoxidation of a model compound, namely para-chlorotoluene (PCT) to para-chlorobenzonitrile (PCBN). A maximum conversion of 99.6% of PCT and 86.5% yield and 86.8% selectivity to PCBN have been obtained over the CrVO 4 /SiO 2 catalyst with 60% weight of metal oxides at a temperature of 410 °C, n( PCT): n (NH 3 ): n (air) = 1:3:15 and reaction load = 0.13 g/gCat·h. In addition, this catalyst was efficient and selective toward ammoxidation reactions of toluene, ortho- and meta-chlorotoluenes. Graphical abstract
研究领域:
催化化学
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材料科学
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DOI
高影响因子
ECS Journal of Solid State Science and Technology
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2015
·Vol. 5
·期 2
·P21
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IF 1.558
Bin Hu,Wen Luo,Lin Jin,Zengchen Liu,Mengnan Wang,Liuyang Zhou,Chunyang Li
Two novel carbazole-3, 4-ethoxylenedioxythiophene (EDOT) derivatives containing acceptor groups such as benzonitrile and phthalonitrile were synthesized and characterized. Both the monomers could be electrochemically polymerized and form stable electroactive polymer films. Spectroelectrochemical technique were performed to investigate the electrochemical and optical changes of the resulting polymer films, multi-electrochromic properties upon different applied potentials suggested the effect of the benzonitrile and phthalonitrile units and their potential applications in electrochromic device. Furthermore, scanning electron micrographs (SEM) were used to study the microstructure morphology of polymer films.
研究领域:
材料科学
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电化学
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高分子化学
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DOI
高影响因子
Advanced Materials Interfaces
·
2021
·Vol. 8
·期 11
·2100013
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IF 6.147
Rongxiu Guo,Guangqi He,Xinyu Chen,Xinyue Zhang,Ze-nan Hu,Xiaodong Li,Dun Niu,Hong-bin Sun
Surface wettability of heterogeneous catalysts plays a crucial role in the catalytic activity and selectivity. In this work, an ultra-thin modified silica coating is firstly used as the “skin” to adjust the surface hydrophilicity of the catalyst, which promotes the catalytic activity and selectivity in the transfer hydrogenation of nitriles. The ultrathin-modified silica “skin” with 2–3 nm thickness is fabricated by the consecutive hydrolysis of (3-aminopropyl)triethoxysilane and n -propyltriethoxysilane, and the bimetallic catalyst Fe 3 O 4 @PtCu is encapsulated in the coating. The modified catalyst demonstrated significant catalytic efficiency for hydrogenation of benzonitrile to dibenzylamine. The reaction performs 93% conversion and 99% selectivity in “green” solvent H 2 O. Furthermore, the modified silica “skin” encapsulates the PtCu nanoparticles to prevent the leaching of active sites, thus brings excellent catalytic recyclability. More than Fe 3 O 4 @PtCu, the modified silica “skin” is applicable to a diverse range of catalysts, that is, PtCu/SiO 2 , PtCu/Al 2 O 3 , and PtCu/UiO-66, endowing them with additional catalytic activity and selectivity in the hydrogenation of nitriles.
研究领域:
催化
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材料科学
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化学工程
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DOI
高影响因子
TALANTA
·
2019
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IF 4.916
Xiang-Nan He,Ya-Ning Wang,Yue Wang,Zhang-Run Xu
Sialic acid (SA) is a special monosaccharide widely distributed at the termini of sugar chains on the cell surface, and its expression level is closely connected with various biological and pathological processes. Therefore, accurate quantitative detection of SA on cancer cell surface is of great significance for clinical diagnosis and therapy. Here, we developed a whole-surface accessible method of accurate SERS quantification of SA level on a single cell, in which silver nanoparticles functionalized with 4-mercaptophenylboric acid and 4-mercaptobenzenitrile was used as the background-free SERS probe. The cyano group on the nanoprobe showed a unique Raman shift at 2232 cm −1 , where most of the biological samples have no Raman response. Meanwhile, the boronic acid group had high specificity to SA molecules at physiological pH. The expression level of SA can be accurately quantitated on the basis of the C N Raman signal. The average number of expressed SA molecules on the surface of a single HeLa cell was 4.6 × 10 7 . And SERS imaging of a single cell was achieved at 2232 cm −1 without biological interference. We evaluated SA expression level on the surface of different cancer cells and dynamically monitored SA expression under the influence of drugs. The proposed approach is accurate as well as sensitive for background-free quantification of SA on cell surface, which is promising for revealing the relationship between tumors and cell surface glycosylation .
研究领域:
分析化学
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生物医学工程
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癌症研究
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分子生物学
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DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
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2019
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IF 9.518
Yue Sun,Zhihua Li,Xiaowei Huang,Di Zhang,Xiaobo Zou,Jiyong Shi,Xiaodong Zhai,Caiping Jiang,Xiaoou Wei,Tingting Liu
Currently, the detection of pesticide is critical for food safety assurance, but it is still challenging due to the presence of biological interferents from complex food matrix. In this study, we developed an optical anti-interference surface-enhanced Raman scattering (SERS) aptasensor system for trace detection of acetamiprid . 4-(Mercaptomethyl) benzonitrile (MMBN) containing C N bond was used as Raman tag to provide a sharp peak (2227 cm −1 ) in the Raman-silent spectral window (1800-2800 cm −1 ) where no Raman signal existed for most of molecules. Gold nanoparticles (AuNPs) bonded with polyadenine (polyA)-mediated aptamer and Raman tag (MMBN-AuNPs-aptamer) was synthesized as Raman probe, while the complementary DNA (cDNA) conjugated with AgNPs-decorated silicon wafer ( [email protected] ) was used as SERS substrate. As acetamiprid molecule could specifically combine with aptamer, preventing the formation of [email protected] (expressed as “ [email protected] ”) hybrid through DNA sequence linking, Raman signal intensities of MMBN in [email protected] decreased when the concentration of acetamiprid increased. Under the optimum assay condition, the proposed method displayed a linear response for acetamiprid detection in the range of 25–250 nM with a low detection limit of 6.8 nM. Finally, the developed aptasensor was successfully used to determine acetamiprid content in apple juice. Accordingly, this novel anti-interference SERS aptasensor could be a promising acetamiprid sensor for food safety assurance.
研究领域:
食品安全
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分析化学
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环境科学
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纳米技术
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DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2019
·
IF 7.015
Tian-Zhi Jia,Jin-Peng Lu,Xin-Yao Cheng,Qian-Cheng Xia,Xue-Li Cao,Yong Wang,Weihong Xing,Shi-Peng Sun
This study aims to develop a new strategy to fabricate nanofiltration (NF) membranes with high removal efficiency for heavy metal ions in wide acidic pH range. Unlike conventional polyacrylonitrile (PAN) based thin film composite (TFC) membranes that requires multiple coating steps, the new NF membrane was fabricated through direct interfacial polymerization with positively charged polyethyleneimine (PEI) on PAN substrates blended with sulfonated polyarylene ether benzonitrile (SPEB). The unique surface migration effect of SPEB led to a smoother, more hydrophilic surface and sponge-like structure of the substrate. Such a modified structure was found to be crucial to achieve smaller pore size as well as better adhesion of the selective layer and the substrate of the modified TFC membrane. The resultant NF membrane has a reasonably high pure water permeability of 7.62 ± 0.81 LMH·bar −1 , and a molecular weight cut-off of 300 Da. It achieved a reasonably high rejection towards heavy metal cations such as Pb 2+ , Cd 2+ , Ni 2+ over 93.0% in a wide acidic pH range. This work may provide insightful guidelines for upgrading current NF membranes for heavy metal removals in harsh acidic environments.
研究领域:
材料科学
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环境工程
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膜技术
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水处理
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2017
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IF 6.32
Yuzhi Chen,Xiaomin Shi,Zhengliang Lu,Xuefei Wang,Zhuo Wang
Endogenous hydrogen peroxide in vivo is related to many diseases, including cancer, diabetes, cardiovascular disease, and neurodegenerative disorders. Although many probes for detection of H2O2 have been explored, rapid response probes are still expected for in vivo application. Here, a new probe (PAM-BN-PB) was designed based on an intramolecular charge transfer (ICT) process with three parts: phenanthroimidazole, benzonitrile, and phenyl boronate. By modulation ICT process of PAM-BN-PB, H2O2 in solution systems can be detected with good selectivity. The exogenous and endogenous H2O2 in normal living cells, ischemia-reperfusion injury cells, and animals all can be imaged by PAM-BN-PB.
研究领域:
化学
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生物化学
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生物医学工程
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分子生物学
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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）