Catalysts
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2023
·Vol. 13
·期 2
·239
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IF 3.9
Mohammed Jalalah,Zubair Nabi,Muhammad Naveed Anjum,Mirza Nadeem Ahmad,Atta Ul Haq,Muhammad Bilal Qadir,Mohd Faisal,Mabkhoot Alsaiari,Muhammad Irfan,Farid A. Harraz
Growing industry and its effluents create a serious environmental concern. Various industrial wastes such as toxic dyes and volatile organic compounds are posing a threat to a clean environment because of their non-biodegradable nature and high chemical stability. In recent years, the degradation of toxic dyes and drugs by photo-catalysts has gained much importance and proved a successful approach to capture light by hybrid photo-catalysts for decomposing toxic organic molecules. This work presents the synthesis of a poly(o-anisidine)-based composite with graphitic carbon nitride and zinc oxide (POA/g-C3N4/ZnO) and its utilization as a photo-catalyst. Various analytical techniques investigated the synthesized photo-catalysts’ chemical structure, crystallinity, and morphology. The degradation of Congo red dye evaluated the efficiency of the photo-catalyst in an aqueous medium under ultraviolet light. It was revealed that the photo-catalytic activity of the synthesized POA/g-C3N4/ZnO composites show 81.43%, 92.28%, and 87.05% degradation. This sustainable composite will be highly beneficial to treat industrial wastewater to make our environment clean.Keywords:poly(o-anisidine);graphitic carbon nitride;zinc oxide;ternary composite;photo-catalytic degradation;Congo red;industrial wastewater treatment
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JOURNAL OF ETHNOPHARMACOLOGY
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2023
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IF 5.4
Yifan Bing,Zhiwei Sun,Shuang Wu,Yan Zheng,Yingbo Xi,Wenlan Li,Xiang Zou,Zhongyuan Qu
Ethnopharmacological relevance Dried and mature seeds of Vaccaria segetalis (Neck.) Garcke ex Asch. (VS) are known for their therapeutic effects, as they stimulate blood circulation, promote menstruation and diuresis and eliminate gonorrhoea . However, due to its hard shell, the dissolution of its active ingredients is often improved by steaming and frying in clinical applications. Among the processed products , wine-steamed Vaccaria segetalis (WVS) is one of the commonly used ones . Numerous historical records have shown that wine steaming can enhance the efficacy of drugs to promote blood circulation and remove blood stasis . However, the differences in the efficacy of VS and WVS in promoting blood circulation and removing blood stasis have not been thoroughly studied, and the possible reasons for these differences have not been reported. Aim of the study The objective of this study was to identify quality markers (Q-markers) that could differentiate the efficacy of promoting blood circulation and removing blood stasis of VS and WVS, which could serve as a basis for the rational application of VS and WVS in clinical settings. Materials and methods A pharmacodynamic comparison between the water extracts of VS and WVS was carried out based on a mouse acute blood stasis model (ABS) and thrombus zebrafish model. The potential bioactive substances of WVS were screened by investigating the correlation between common peaks identified for 10 batches of WVS by ultra-performance liquid chromatography quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS/MS) and their rate of thrombosis inhibition in zebrafish. Furthermore, multivariate statistical analysis of chemical components between VS and WVS was conducted to speculate the Q-markers combined with the results of the bioactive components. Based on the efficacy verification of Q-markers, the content of Q-markers in 10 batches of WVS was evaluated. Results The results of efficacy comparison assays demonstrated that the efficacy of WVS was more prominent than VS at the same dose. Five components were screened as effective components of WVS for promoting blood circulation and removing blood stasis by correlation analysis. Furthermore, a total of 24 common ingredients were identified in VS and WVS extracts, and 9 of them showed increased dissolution rate after wine steaming, including 4 active ingredients, Hypaphorine, Vaccarin, Saponarin, and Isovitexin-2″-O-arabinoside, which were screened out by correlation analysis. The monomer test suggested that these 4 components could activate blood circulation and remove blood stasis in a dose-dependent manner. Consequently, Hypaphorine, Vaccarin, Saponarin, and Isovitexin-2″-O-arabinoside were selected as Q-markers to distinguish between VS and WVS. The content determination showed that the total contents of 4 Q-markers of WVS from 10 batches with different origins ranged from 0.478% to 0.716%. Conclusions This study compared the efficacy of VS and WVS in promoting blood circulation and resolving stasis and revealed Q-markers that reflected the difference in efficacy between them for the first time, which laid the foundation for establishing quality standards for WVS.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2019
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IF 6.361
Chen Song,Zhen Zhao,Youhui Lin,Yang Zhao,Xiang-yang Liu,Changxu Lin,Chenxu Wu
An enhancement of the reactional wettability variation (RWV) sensing strategy is achieved based on the wettability switch of a nanoneedle surface. The sensor unit is formed by coating hydrophobic azoimidazole compounds, as the responder compounds onto the originally hydrophilic surface of cobalt hydroxide nanoneedles. The complexation reaction between metal ions and azoimidazole ligands etches the hydrophobic coating and switches the surface wettability, making the surface hydrophilic again. This switch is revealed by a decrease in the static contact angle (CA) and an increase in the sliding angle of the surface. The reactivity is tuned by the derivatization and conformational manipulation of the azoimidazole compounds. A sensor array composed of six as-tuned sensor units is constructed to distinguish among the species and concentrations of Fe 3+ , Ni 2+ and La 3+ at a low limit of 10 −6 M using the chemometric method of principal component analysis (PCA). In addition, a new on-site detection strategy is developed based on PCA of the sliding angle, which can be measured conveniently and swiftly with a smartphone app and a commercially available setup. The application of the general RWV strategy is envisioned to open new possibilities for on-site detection.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2019
·Vol. 411
·期 10
·2209-2221
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IF 3.286
Zhang Yinchenxi,Duan Yixiang
A solid-phase microextraction (SPME) fiber based on a new polymeric ionic liquid was prepared for the extraction of trace aromatic amines in water and their detection by gas chromatography–mass spectrometry (GC–MS). The newly designed polymeric ionic liquid with two functional groups (benzene ring and ether group) was synthesized and fixed on stainless steel wire to effectively extract aromatic amines. Parameters that affect the extraction efficiency of the SPME fiber (extraction temperature, extraction time, alkali concentration, and salt concentration) were optimized to establish a headspace SPME–GC–MS method. The correlation coefficients were 0.996 or greater for concentration of the aromatic amines ranging from 0.01 to 10 μg mL -1 . In addition, the limits of detection for the new fiber are as low as 0.67 ng mL -1 , which is lower than that obtained with polyacrylate. The relative standard deviations of five consecutive extractions for the solution spiked at 1 μg mL -1 by the same fiber were all below 8.3%, and the interfiber relative standard deviations for the solution spiked at the same concentration ranged from 8.9% to 15.2%. Furthermore, long lifetime and good solvent resistance are exhibited by the fiber. Finally, satisfactory relative recovery in the range from 85.3% to 101.9 % was achieved for two environmental water samples.
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SENSORS AND ACTUATORS B-CHEMICAL
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2016
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IF 4.758
Yulan Wang,Dawei Fan,Dan Wu,Yong Zhang,Hongmin Ma,Bin Du,Qin Wei
In this work, silver nanoparticles functionalized cuprous oxide nanowires (Ag@Cu 2 O) nanocomposites were synthesized by a simple method. The nanostructure of it could be well confirmed by a scanning electron microscope (SEM) image. Due to the good synergistic effect between silver nanoparticles (Ag NPs) and cuprous oxide nanowires (Cu 2 O NWs), Ag@Cu 2 O nanocomposites displayed a good electrocatalytic performance towards the reduction of hydrogen peroxide (H 2 O 2 ). Cyclic voltammograms (CVs) were employed to investigate electrocatalytic mechanism of it. Using Ag@Cu 2 O nanocomposites as the labels, a novel and ultrasensitive sandwich-type electrochemical immunosensor was developed for the quantitative detection of carcinoembryonic antigen (CEA). Due to the special electrochemical performance of Ag@Cu 2 O nanocomposites, the facile and sensitive fabrication of the designed immunosensor was achieved. Under optimal conditions, the designed immunosensor exhibited a wide linear range with a low detection limit. It also displayed an electrochemical performance with good reproducibility, selectivity and stability, which would provide potential applications in the clinical diagnosis of other tumor markers.
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BIOSENSORS & BIOELECTRONICS
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2016
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IF 7.476
Huan Wang,Yong Zhang,Yulan Wang,Hongmin Ma,Bin Du,Qin Wei
In this work, the assembly between one-dimensional (1D) nanomaterials and two-dimensional (2D) nanomaterials was achieved by a simple method. Cuprous oxide nanowires decorated graphene oxide nanosheets (Cu 2 O@GO) nanocomposites were synthesized for the first time by a simple electrostatic self-assembly process. The nanostructure was well confirmed by scanning electron microscope (SEM) and transmission electron microscope (TEM) images. Taking advantages of good electrocatalytic activity and high specific surface area of Cu 2 O@GO nanocomposites, a label-free electrochemical immunosensor was developed by employing Cu 2 O@GO as signal amplification platform for the quantitative detection of alpha fetoprotein (AFP). In addition, toluidine blue (TB) was used as the electron transfer mediator to provide the electrochemical signal, which was adsorbed on graphene oxide nanosheets (GO NSs) by electrostatic attraction . The detection mechanism was based on the monitoring of the electrochemical current response change of TB by the square wave voltammetry (SWV) when immunoreaction occurred on the surface of electrode. Under optimal conditions, the proposed immunosensor displayed a high sensitivity and a low detection limit. This designed method may provide an effective method in the clinical diagnosis of AFP and other tumor markers.
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Frontiers in Chemistry
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2024
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IF 3.8
Ali S. Alkorbi,Nouman Gill,Muhammad Naveed Anjum,Muhammad Jawwad Saif,Mirza Nadeem Ahmad,Muhammad Bilal Qadir,Zubair Khaliq,Mohd Faisal,Mohammed Jalalah,Farid A. Harraz
Industrial dye effluent causes significant risks to the environment. The present study was focused on photocatalytic degradation of the dye Direct Red 28 using a ternary composite of graphitic carbon nitride, TiO2, and polyorthoanisidine (g-C3N4/TiO2/POA), prepared by in-situ oxidative polymerization o-anisidine. The synthesized composite g-C3N4/TiO2/POA properties were characterized using different analytical techniques. X-ray diffraction (XRD) results revealed the prominent pattern of TiO2 and g-C3N4 in the composite peak at 2θ° while Fourier transform infrared (FTIR) results provided the confirmation peaks for g-C3N4/TiO2/POA and POA at 1,110 cm−1 and 1,084 cm−1 for C-O-C ether. Scanning electron microscopy (SEM) demonstrated an increase in the average size of the composite up to 428 nm. The energy-dispersive X-ray spectroscopy (EDX) spectrum provided the weight percentages of the C, O, and Ti in the composite were 8.5%, 45.69%, and 45.81%, respectively. The photocatalytic degradation of Direct Red 28 dye under UV irradiation using a composite showed that 86% Direct Red 28 dye was degraded by a 30 mg/L dose of g-C3N4/TiO2/POA in 240 min at pH 2. After four consecutive cycles, the utilized composite showed 79% degradation of Direct Red 28, demonstrating the stability and effectiveness of the g-C3N4/TiO2/POA photocatalyst. The high reusability and efficiency of the g-C3N4/TiO2/POA composite are due to increased light absorption range and reduced e−/h+ recombination rate in the presence of g-C3N4 and POA.
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ACS Sustainable Chemistry & Engineering
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2025
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IF 7.3
Kai Zhu,Zihan Lin,Xinyi Bai,Fangfang Chang,Qing Zhang,Xiaolei Wang,Zhengyu Bai
Electrocatalytic reduction reaction of CO2 (CO2RR) into value-added multicarbon (C2+) products represents a sustainable strategy for mitigating greenhouse gas emissions and enhancing the production of high-value chemicals. Cu-based catalysts are optimal for the CO2RR, facilitating the generation of C2+ products such as ethanol, which have significant industrial applications. However, converting CO2 to C2+ products remains a great challenge, necessitating the simultaneous achievement of high current density, Faradaic efficiency (FE), and operational stability for industrial-scale implementation. Herein, we prepared Cu/Cu2O catalysts with diverse morphologies and the ratio of the Cu+/Cu interface, which was rectified by regulating the interactions between the active interface and the intermediate (*CO). The electrochemical analysis demonstrated that reconstructed Cu/Cu2O nanodendrites with dominant grain boundaries exhibited remarkable performance in generating C2+ products, achieving a Faradaic efficiency (FE) of 71.8%, including 49.7% FE of ethanol and a substantial partial current density of 390.0 mA cm–2 within the flow cell. In situ spectroscopy characterization and theoretical calculations revealed that the increased ethanol selectivity originated from the rectification of the Cu/Cu2O interface by the *CO intermediate, which accelerated H2O dissociation, reduced the free energy for *CO hydrogenation to *COH, and facilitated asymmetric *CO-*COH coupling to preferentially reduce CO2 to ethanol. This study provides profound insights into the C–C coupling pathways and sheds light on the rational design of ethanol-oriented electrocatalysts, contributing to sustainable chemical synthesis and energy utilization.
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BIORESOURCE TECHNOLOGY
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2025
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IF 9
Jirong Long,Yuxuan Mao,Yiwei Long,Guozhang Chang,Lungang Chen,Wenguang Zhou,Jinxing Long,Yong Liu
Hydrodeoxygenation of lignin-derived phenols into high-value cycloalkanes under mild conditions is challenging. Herein, we report a Ru NPs @HZSM-5 catalyst with a unique metal-support interactions that achieves 100 % guaiacol conversion and 99.7 % cyclohexane selectivity at 160 °C and 1 MPa H 2 . Comparative studies with single-atom and aggregated Ru catalysts reveal that well-dispersed Ru nanoparticles coupled with acid sites offer superior activity and selectivity. Kinetic analysis and in situ DRIFTS demonstrate a sequential mechanism involving rapid hydrogenation of the aromatic ring followed by rate-limiting deoxygenation steps. Characterizations and CO-DRIFTS confirm particle sizes, optimal metal-support interactions, and enhanced acidity in Ru NPs @HZSM-5. Theoretical calculations further reveal favorable electronic states and lower energy barriers for deoxygenation on Ru NPs @HZSM-5. The catalyst also shows broad substrate compatibility, efficiently converting various lignin-derived phenolics. This work provides valuable insights into the critical synergy between metal nanoparticles and acidic supports for efficient lignin upgrading.
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