SEPARATION AND PURIFICATION TECHNOLOGY
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2020
·
IF 5.774
Liang Xuan,Li-Jiao Tian,Tian Tian,Xue-Meng Wang,Dian-Hai Yang,Han-Qing Yu
Modifying membranes with nanoparticles is a promising approach to mitigate biofouling in membrane preparation processes. However, high costs of the modification agents limit the practical applications of this approach. In this work, we developed a cost-effective and ecofriendly method to provide polyvinylidene fluoride membrane with a strong antimicrobial activity by loading silver nanoparticles (AgNPs). In this approach, gallic acid (GA) was used as a capturing and reducing agent to in situ synthesize AgNPs on membrane surface. The resulting AgNPs-functionalized membrane exhibited a 3.5-fold higher pure water flux and enhanced antifouling capacity compared to the control membrane. Specifically, AgNPs endowed the membrane a compelling antimicrobial activity on both Gram-positive and Gram-negative bacteria, evidenced by diffusion inhibition zone and bacterial proliferation test results. More importantly, pomegranate peel extracts rich in GA was effectively used in such a membrane functionalization approach. Taken together, this work demonstrates the robust in situ fabrication of antimicrobial AgNPs-functionalized membranes through bio-derived GA and provides a promising alternative for their potential practical applications.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Zijun Zhao,Muwen Lu,Zhu Mao,Jie Xiao,Qingrong Huang,Xuechun Lin,Yong Cao
The impacts of protein nanoparticles on the interfacial distribution of antioxidants and the oxidative stability in Pickering emulsions are attracting increasing research interests. In the present work, the distribution of gallic acid (GA) in zein nanoparticles-stabilized Pickering emulsions (ZPE) was determined by employing a pseudophase kinetic model. The interfacial distribution of GA was found to be favored in ZPEs with higher zein nanoparticle concentration (C zein ). Upon increasing C zein , the interfacial loading of nanoparticles (Γ) dominated the modulation of %GA I via hydrogen bonding between zein nanoparticles and GA. The interfacial percentage of GA (%GA I ) increased from 28% to 39% as Γ increased from 0.48 to 1.12 mg/m 2 . In the presence of GA, a direct correlation between C zein or Γ and oxidation stability was recognized, whereas the oxidative stability showed a non-linear dependence on either C zein or Γ in the absence of GA. By excluding antioxidant effects of zein nanoparticles, we found that the %GA I , which was regulated by Γ, took the leading role over the physical barrier effect on the oxidative stability of emulsions. The present work extends our current knowledge on how protein based nanoparticles manipulate the interfacial distribution of antioxidant and then affect the oxidative stability of emulsions.
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Advanced Materials Interfaces
·
2020
·Vol. 7
·期 18
·2000804
·
IF 4.948
Jing Ling,Suqin Gong,Yunsheng Xia
In this study, the eco-friendly fabrication system of the hierarchical monodisperse Fe 2 O 3 supraparticles (SPs) is systematically studied. First, by means of urea as pH modulator, monodisperse Fe 2 O 3 SPs with 7 to 90 nm in diameters can be one-step in situ self-assembled in 100% water solution. Then, the SPs can be reliably fabricated by various carboxyl stabilizers, indicating the versatility of the proposed fabrication system. Third, by means of gallic acid (GA) modification, the corresponding products (denoted as Fe 2 O 3 @GA SPs) can be endowed near-infrared light-absorbing properties and photothermal therapy potentials. Fourth, the Fe 2 O 3 @GA SPs exhibit size-dependent photothermal performances and cellular uptake. In terms of 8 nm sized Fe 2 O 3 @GA SPs, their photothermal conversion efficiency and cellular uptake are 66.63% and 8.4 pg Fe/cell, both of which are higher than that of 25 and 47 nm sized products.
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CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Tao Pan,Yu Wang,Xin Yang,Xiong-fei Huang,Rong-liang Qiu
Fe(II)-catalyzed peroxymonosulfate (PMS) activation process was able to degrade persistent organic pollutants, such as polybrominated diphenyl ethers (PBDEs), but the slow transformation rate from the generated Fe(III) to Fe(II) restricted the efficiency of this process. In this study, we found that the addition of small quantities of gallic acid (GA), a model compound of natural polyphenols, in the Fe(III)/PMS process (namely GA/Fe(III)/PMS process) could exert a long-term influence on Fe(II) recycle and accelerated the degradation of 2,2′,4,4′-tetrabromodiphenyl ether (BDE47) over 72 h. Under conditions of 20.3 µM GA, 13.6 µM Fe(III) and 400 µM PMS, the degradation efficiency of BDE47 reached 85%, which was 9.4 times higher than that in the Fe(III)/PMS process. The degradation kinetics can be divided into an initial “fast stage” (k obs1 = 0.298 h −1 ) and a second “slow stage” (k obs2 = 0.021 h −1 ). Aromatic radicals such as hydroxycyclohexadienyl radical (poly-HCD ) produced by the attack of SO 4 − /HO on GA was proposed to be responsible for Fe(II) recycle in the first stage, while ring-opened products following SO 4 − /HO attack of GA-quinone mainly initiated Fe(III) reduction in the second stage. Owing to the multiple Fe(III) reduction pathways, PMS would be continuously activated by Fe(II) to form SO 4 − and HO , which were the dominant reactive species for BDE47 degradation. Finally, natural polyphenols extracted from green tea were proven effective in enhancing BDE47 degradation in Fe(III)/PMS process. This study not only provides a new way to propagate Fe(II)-activated persulfate chain reactions for the degradation of refractory organic contaminants, like PBDEs, but also sheds new insight into the reactivity of organic byproducts toward Fe in PMS-based oxidation system.
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MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Congcong Hu,Yu Yin,Chongyang Huang,Yaolin Dong,Jinquan Liu,Fubing Xiao,Shengyuan Yang
Gallic acid (GA), widely used in food and medicine production industries. Herein, a kind of newly synthesized cobalt-nitrogen co-doped carbon dots (Co,N-CDs) with dual functional properties of oxidase-like activity and photoluminescence property could oxidize the 3,3′,5,5′-tetramethylbenzidine (TMB) to oxTMB with a new absorption peak at 653 nm. In addition, it was found that oxTMB performed a fluorescence-quenching effect on Co,N-CDs at 440 nm attributed to FRET (Fluorescence resonance energy transfer). Reductive GA could reduce oxTMB to TMB, weaken the blue color, and restore the fluorescence of Co,N-CDs. Thus, a colorimetric and fluorometric method for dual-mode detection of GA was established. The synthesis of the dual-signal probe was completed with a single and environmental precursor in just one step. Simultaneously, the dual-mode detection reduced detection limits, broadened the linear range and improved anti-interference ability. This method exhibited a satisfactory application prospect in the actual detection of GA in tea beverages.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
·
IF 8.2
Lipei Shen,Jiangqi Hu,Yafei Yuan,Xiaoyu Wang,Qingsong Jiang
Peri-implantitis, a leading cause of implant failure, currently lacks effective therapeutic strategies. Given that bacterial infection and reactive oxygen species overabundance serve as primary pathogenic and triggering factors, respectively, an adhesive hydrogel has been created for in-situ injection. The hydrogel is a gallic acid-grafted chitosan (CS-GA) hydrogel containing tannic acid miniaturized particles (TAMP). This provides antibacterial and antioxidant properties. Therefore, this study aims to evaluate the potential role of this hydrogel in preventing and treating peri-implantitis via several experiments. It undergoes rapid formation within a span of over 20 s via an oxidative crosslinking reaction catalyzed by horseradish peroxidase and hydrogen peroxide, demonstrating robust adhesion, superior cell compatibility, and a sealing effect. Furthermore, the incorporation of TAMP offer photothermal properties to the hydrogel, enabling it to enhance the viability, migration, and antioxidant activity of co-cultured human gingival fibroblasts when subjected 0.5 W/cm 2 808 nm near-infrared (NIR) irradiation. At higher irradiation power, the hydrogel exhibits progressive improvements in its antibacterial efficacy against Porphyromonas gingivalis and Fusobacterium nucleatum . It attains rates of 83.11 ± 5.42 % and 83.48 ± 6.855 %, respectively, under 1 W/cm 2 NIR irradiation. In summary, the NIR-controlled CS-GA/TAMP hydrogel, exhibiting antibacterial and antioxidant properties, represents a promising approach for the prophylaxis and management of peri-implantitis.
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Communications Chemistry
·
2023
·Vol. 6
·期 1
·1-10
·
IF 5.9
Li Pan,Gemayel Rachel,Li Xue,Liu Jiangping,Tang Mingjin,Wang Xinming,Yang Yan,Al-Abadleh Hind A.,Gligorovski Sasho
Heterogeneous reaction of gas phase NO 2 with atmospheric humic-like substances (HULIS) is potentially an important source of volatile organic compounds (VOCs) including nitrogen (N)-containing compounds, a class of brown carbon of emerging importance. However, the role of ubiquitous water-soluble aerosol components in this multiphase chemistry, namely nitrate and iron ions, remains largely unexplored. Here, we used secondary electrospray ionization ultrahigh-resolution mass spectrometry for real-time measurements of VOCs formed during the heterogeneous reaction of gas phase NO 2 with a solution containing gallic acid (GA) as a proxy of HULIS at pH 5 relevant for moderately acidic aerosol particles. Results showed that the number of detected N-containing organic compounds largely increased from 4 during the NO 2 reaction with GA in the absence of nitrate and iron ions to 55 in the presence of nitrate and iron ions. The N-containing compounds have reduced nitrogen functional groups, namely amines, imines and imides. These results suggest that the number of N-containing compounds is significantly higher in deliquescent aerosol particles due to the influence of relatively higher ionic strength from nitrate ions and complexation/redox reactivity of iron cations compared to that in the dilute aqueous phase representative of cloud, fog, and rain water.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Huazhen Liao,Song Ye,Peixuan Lin,Ling Pan,Deping Wang
The combination of upconversion nanoparticles (UCNPs) with porous zeolites could enable the development of multifunctional composites and extend their optical applications in sensing, detection and biomedical monitoring. Herein, a series of high luminescent UCNPs@Zeolites nano-micro composites were constructed via the in situ growth strategy, by taking the low phonon-energy fluoride nanoparticles of NaLnF 4 (Ln = Y, Gd) as doping hosts for Er 3+ /Yb 3+ , desilicated FAUY and ZSM-5 as the target zeolites. Benefiting from the formation of tightly combined interfaces between the UCNPs and the target zeolites that effectively passive the surface defects of UCNPs, three orders of magnitude of improved upconversion emission in maximum was obtained under 980 nm excitation through afterward heat treatment at 400 ℃. Moreover, the pre-exchange of Yb 3+ into target zeolites before the in situ growth of UCNPs is another feasible approach to drastically improve the upconversion emission intensity of the UCNPs@Zeolites nano-micro composites. By taking NaGdF 4 :Yb,Er@DSZSM-5/HT as an example probe, the detection of GA was demonstrated and the detection ability of which is super than that of the corresponding bare NaGdF 4 :Yb,Er UCNPs. This research provided a universal approach to construct the UCNPs@Zeolites nano-micro composites with varied upconversion emission colors simply by choosing activator ions, which therefore indicates wide potential applications.
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Food Chemistry-X
·
2023
·
IF 6.1
Min Zhang,Bin Yang,Zimeng Yuan,Qi Sheng,Changchun Jin,Jun Qi,Manman Yu,Yingnan Liu,Guoyuan Xiong
The present study investigated the mechanical characteristics, hydrophobicity, antioxidant and antibacterial properties, FTIR, SEM and XRD of films fabricated with corn starch and pullulan (CS/PUL) by adding different concentrations of Gallic acid (GA) (0%, 0.5%, 1.0%, 1.5% w/v). The mechanical strength and opacity of CS/PUL films were enhanced by the addition of 1.0% GA. The water vapor permeability (WVP) of CS/PUL films was significantly lower in films with GA compared to those without ( P < 0.05). The addition of GA, especially at concentrations of 1.0% and 1.5%, resulted in considerably better free radical scavenging activities on DPPH than films without GA ( P < 0.05). Interestingly, the highest water contact angle (WCA) value was observed in films with 0.5% GA, indicating stronger hydrophobicity. Furthermore, the antibacterial capabilities of the films, particularly against E. coli and P. aeruginosa , improved with an increase in GA concentration. The results of FTIR, SEM and XRD analyses showed that GA was well distributed in the CS/PUL matrix.
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FOOD RESEARCH INTERNATIONAL
·
2023
·
IF 8.1
Xiaoyun Fei,Yuzhong Yan,Langhong Wang,Zhaohua Huang,Deming Gong,Guowen Zhang
This study aimed to explore the impacts of gallic acid (GA)/protocatechuic acid (PA) on the structural and functional characteristics of whey proteins (WP) through covalent binding. To this purpose, the covalent complexes of WP-PA and WP-GA at different concentration gradients were prepared by the alkaline method. SDS-PAGE indicated that PA/GA was cross-linked by covalent bonds. The decreased contents of free amino and sulfhydryl groups suggested that WP formed covalent bonds with PA/GA by amino and sulfhydryl groups, and the structure of WP became slightly looser after covalent modification by PA/GA. When the concentration of GA was added up to 10 mM, the structure of WP was slightly loosened with a reduction of α-helix content by 2.3% and an increase in random coil content by 3.0%. The emulsion stability index of WP increased by 14.9 min after interaction with GA. Moreover, the binding of WP and 2–10 mM PA/GA increased the denaturation temperature by 1.95 to 19.87 °C, indicating the improved thermal stability of the PA/GA-WP covalent complex. Additionally, the antioxidant capacity of WP was increased with increasing GA/PA concentration. This work may offer worthful information for enhancing the functional properties of WP and the application of the PA/GA-WP covalent complexes in food emulsifiers.
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MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 4
·1-13
·
IF 5.7
Luo Jialun,Jiang Cheng,Zhao Jihua,Zhao Luyao,Zheng Peizhu,Fang Jian
The development of effective and accurate gallic acid (GA) electrochemical sensors is critical for food and pharmaceutical industry and health perspectives. Multi-step hydrothermal treatments of bimetallic (Ni/Co) flaky bimetallic hydroxides (NiCo FBHs) were employed to prepare tungsten-doped cobalt-nickel selenides nanosheets arrays (W-Co 0.5 Ni 0.5 Se 2 NSAs) serving as the main active substance of GA detection. The morphology and composition of the W-Co 0.5 Ni 0.5 Se 2 NSAs/NF were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The GA electrochemical sensor constructed by the W-Co 0.5 Ni 0.5 Se 2 NSAs/NF composite electrode exhibits two linear concentration ranges of 1.00–36.2 μM and 36.2–1.00×10 3 μM for GA electrochemical detection with a limit of detection of 0.120 μM (S/N=3) at the working potential of 0.05 V (vs. SCE). The W-Co 0.5 Ni 0.5 Se 2 NSAs/NF shows high selectivity, good long-term stability, high recovery in the range 97.9–105%, and a relative standard deviation (RSD) between 0.60 and 2.7%. Graphical abstract
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COMPOSITES PART B-ENGINEERING
·
2023
·
IF 13.1
Hua Zeng,Zheng-Ran Ying,Xiong Luo,Shuo Tan,Xiao-Hao Liu,Xin-Yu Zhao,Shi-Sheng He,Feng Chen,Anatoly I. Kulak,Bing-Qiang Lu
Diabetes-associated chronic wound management has been a serious worldwide issue, which is obstructed by multiple factors such as sustained inflammation, attenuated angiogenesis, and fragile defense against bacterial infection in the wound niche. Thus, there stands an urgent demand for biomaterial dressings that are able to treat such complex conditions. Herein, we developed a composite biomaterial of gallic acid-modified bioglass ( [email protected] ) in an anhydrous system, by using two agents which have already been used in clinical practice. The prepared [email protected] not merely promoted the migration and angiogenesis of vascular endothelial cells but also provided superior antibacterial performance in the local environment. Significantly, the gallic acid-assisted modification made the color of bioglass (BG) change from white to black, endowing it with high light absorption to successfully achieve a significant photothermal property. Then, the strengthened antibacterial effects were further realized by irradiation with near-infrared light (NIR) based on this photothermal property. Particularly, the combined therapy ( [email protected] + NIR) was demonstrated as an effective strategy in treating the infected full-thickness dermal wounds of diabetic rats. This research provides a convenient non-antibiotic medicine formula for diabetic wounds with infection, and demonstrates a valid modification for inorganic bioglass-based material with organic polyphenol, which inspires more expansive composites for wound biomaterials.
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