CRYSTENGCOMM
·
2022
·Vol. 24
·期 14
·2542-2550
·
IF 3.756
Ming-Yang Cao,Chun-Li Hu,Peng-Fei Chen,Qian Wang,Bing-Xuan Li,Yuan Lin,Jiang-Gao Mao
Three nonlinear optical materials Cd4REO(BO3)3 (RE = Sm, Eu, Tb) have been synthesized through high-temperature solid-state reactions. In their crystal structures, Cd(1)O8 and Cd(2)O6 polyhedra are interconnected via sharing edges and corners into a 3D anion framework with two types of tunnels based on 4- and 7-membered rings; the BO3 groups are grafted into the above-mentioned types, creating new tunnels based on Cd4B3 seven-membered rings, which are filled by RE3+ cations. Powder SHG measurements revealed that the Cd4REO(BO3)3 (RE = Sm, Eu, Tb) samples display SHG signals that are approximately 1.2, 5.6 and 1.5 times that of the KDP sample. In addition, Cd4EuO(BO3)3 and Cd4TbO(BO3)3 emit red and green light, respectively. The lifetime of the Eu(5D0) state for λex,em = 464, 610 nm in Cd4EuO(BO3)3 is measured to be about 1.43 ms whereas the lifetime of the Tb(5D4) state for λex,em = 376, 543 nm in Cd4TbO(BO3)3 is measured to be about 1.01 ms.
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CHEMOSPHERE
·
2022
·
IF 8.943
Zhuyu Sun,Dan Geng,Xiuling Wu,Luxiang Zhu,Jin Wen,Le Wang,Xiaoxiang Zhao
As an emerging class of organic contaminants , polyhalogenated carbazoles (PHCZs) have been increasingly detected all over the world since 1980s. Due to the environmental persistence, bioaccumulation, and dioxin-like toxicity, PHCZs have aroused widespread concerns in recent years. However, efficient approach for the degradation of PHCZs is quite limited so far. Therefore, in this study, an advanced oxidation process (AOP), sulfidated zero-valent iron/peroxymonosulfate (S-ZVI/PMS) system was used to degrade 3-chlorocarbazole (3-CCZ), which is one of the mostly detected PHCZs congeners. The degradation of 3-CCZ was systematically studied under different conditions by varying the molar ratio of S/Fe, the dosage of S-ZVI or PMS, pH and temperature. The results indicated that S-ZVI/PMS was an effective strategy for PHCZs treatment. The 20-min degradation efficiency of 3-CZZ was up to 96.6% with the pseudo-first-order rate constant of 0.168 min −1 under the conditions of 5 mg/L 3-CZZ, 0.3 g/L S-ZVI (S/Fe = 0.2), 1.0 mM PMS, pH 5.8 and 25 °C. HCO 3 − , Cl − and humic acid (HA) showed inhibitory effects to different degrees. Results of the electron paramagnetic resonance (EPR) and scavenging experiments clarified the dominant role of •OH, followed by 1 O 2 and SO 4 •─ . The product analysis and DFT calculation revealed three degradation pathways of 3-CCZ, namely hydroxylation, dechlorination and C–N bond cleavage, which largely alleviated the toxicity of the parent compound. This study showed the effectiveness of S-ZVI/PMS system in PHCZs treatment and provided a comprehensive investigation on the degradation behaviors of PHCZs in AOPs.
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Food & Function
·
2022
·Vol. 13
·期 5
·2618-2630
·
IF 6.317
Xin Hao,Jiahong Xie,Yuting Li,Wei Chen
Anthocyanins are natural products that display diverse bioactivities but are limited in their applications by low stability and bioavailability. Acylated anthocyanins are found to possess higher stability, while their bioactivities are still obscure. In this study, acetylation of pelargonidin-3-O-glucoside (Pg3G) was catalyzed by Candida antarctica lipase B (CALB) for the first time, with a conversion rate up to 88.77% over 48 h. The acetylated product was identified as pelargonidin-3-O-(6′′-acetyl)-glucoside and its properties were detected. Notably, acetylated Pg3G (Ace Pg3G) possessed better thermostability and lipophilicity than Pg3G, indicating a longer retention time at physiological pH and facilitating penetration into the lipophilic medium as well as the cell membrane. Most importantly, Ace Pg3G exerted better alleviation effects against H2O2-induced oxidative hepatic damage than parent Pg3G via activating the Nrf2/ARE signaling pathway and upregulating the expressions of the downstream phase II detoxification enzymes GCLC and HO-1, thereby reversing redox imbalance and enhancing cell survival. Overall, our research unveiled the better health benefits of Ace Pg3G and also provided new insights about the applications of acetylated anthocyanins in food, cosmetic, and pharmaceutical products.
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Batteries & Supercaps
·
2021
·Vol. 5
·期 4
·e202100367
·
IF 7.093
Yuyao Zhang,Xiaoying Zhu,Dan Kai,Baoliang Chen
Graphical Towards high energy density SIB : Biomass hyaluronic acid (HA) is developed as a novel binder for high-loading Na 3 V 2 (PO 4 ) 3 cathodes in sodium-ion batteries, which delivers a high reversible capacity, a superior rate capability, and a targeted energy density. Fast ion transport, network volume buffer and stable solid permeable interface are demonstrated along with structure-performance mechanisms. Sodium-ion batteries (SIBs) are considered a promising candidate in green energy storage due to their considerable abundance. The low mass loading (less than 2.0 mg cm −2 ) of SIBs-based cathodes cannot meet the energy density on the practical device level, which is mainly restricted by sluggish Na + transport. To the end, a facile and compatible strategy was demonstrated by utilizing hyaluronic acid (HA) binder to achieve fast ion transport and targeted energy density for Na 3 V 2 (PO 4 ) 3 (NVP) cathodes. As a novel functional aqueous binder, HA allowed cathodic materials to organize the unique conductive network. The network-like electrode structure could buffer volume changes during sodiation/desodiation process and provide bi-continuous charge transport channels for both Na + and electrons at the interface. HA promoted the formation of the stable solid permeable interface films, protecting the electrochemical stability of the cathode and ensuring its good cycle performance. These functions of HA binder enabled that NVP delivered a reversible discharge capacity of 107.3 mAh g −1 at 0.5 C (1 C=117 mA g −1 ), which showed no sacrifice of electrochemical performances with mass loading increasing from 1.1 to 4.4 mg cm −2 . Even at a high rate of 20 C, NVP-HA (loading 4.0 mg cm −2 ) could reserve a good capacity of 76.8 mAh g −1 with the retention of 99.3 % after 2000 cycles. This study provides a novel strategy to achieve high energy density for SIBs in large-scale energy storage.
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Foods
·
2021
·Vol. 11
·期 1
·92
·
IF 4.35
Zhiling Tang,Haiming Chen,Ming Zhang,Zhuye Fan,Qiuping Zhong,Weijun Chen,Yong-Huan Yun,Wenxue Chen
Pseudomonas lundensisis the main bacterium responsible for meat spoilage and its control is of great significance. 3-Carene, a natural monoterpene, has been proved to possess antimicrobial activities. This study aimed to investigate the antibacterial activity and mechanism of 3-carene against the meat spoilage bacteriumP. lundensis, and explore its application on pork. After 3-carene treatment, cellular structural changes were observed. Cell walls and membranes were destroyed, resulting in the leakage of alkaline phosphatase and cellular contents. The decreased activity of Ca2+-Mg2+-ATPase and Na+-K+-ATPase showed the imbalance of intracellular ions. Subsequently, adenosine triphosphate (ATP) content and oxidative respiratory metabolism characteristics indicated that 3-carene inhibited the metabolism of the tricarboxylic acid cycle inP. lundensis. The results of binding 3-carene with the vital proteins (MurA, OmpW, and AtpD) related to the formation of the cell wall, the composition of the cell membrane, and the synthesis of ATP further suggested that 3-carene possibly affected the normal function of those proteins. In addition, the growth ofP. lundensisand increase in pH were inhibited in pork during the 5 days of cold storage after the samples were pre-treated with 3-carene. These results show the anti-P. lundensisactivity and mechanism of 3-carene, and its potential use in meat preservation under refrigerated conditions.Keywords:Pseudomonas lundensis;3-carene;preservatives;membrane damage
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JOURNAL OF COORDINATION CHEMISTRY
·
2021
·
IF 1.751
Hanyuan Zhang,Xiaomeng Li,Qin Wang,Jiaxin Zhong,Liang Zhao,Xinlong Wang,Chao Qin
Two new coordination polymers constructed from 5-sulfoisophthalic acid sodium salt (NaH2SIPA) and Co or Cu cations, [Co3(SIPA)2(4,4′-bpy)4(H2O)6]·4H2O (1) and [Cu6O3(HSIPA)3(4,4′-bpy)6(H2O)3]·7H2O (2), have been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction (SXRD), powder X-ray diffraction (PXRD), IR spectroscopy, thermogravimetric analysis, UV-Vis spectroscopy, and elemental analysis. Compound 1 represents a twofold-interpenetrating 3-D framework based on Co, SIPA, and 4,4′-bipyridine ligands with a qzd topology. Different from 1, compound 2 shows a 3-D self-penetrating framework based on Cu, HSIPA, and 4,4′-bipyridine ligands. Furthermore, the photocatalytic performance in reduction of CO2 of 1 under visible light was investigated.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Jing Hu,Kokoette Effiong,Muyuan Liu,Xi Xiao
Allelochemicals derived from plants have shown great potential in mitigating harmful algal blooms (HABs), although different algal species can respond differently to these chemicals. Therefore, we first investigated the allelopathic effects of two newly identified plant-derived allelochemicals, 1,2-benzenediol (1,2-BD) and 3-indoleacrylic acid (3-IDC), on six algal species. Then we further evaluated the allelopathic responses of two bloom-forming species, Microcystis aeruginosa FACHB-905 and Heterosigma akashiwo to 1,2-BD. Results showed that 1,2-BD had a broader antialgal spectrum than 3-IDC. Allelopathic response analysis indicated that 1,2-BD consistently and stably inhibit the growth of M. aeruginosa FACHB-905, with inhibitory mechanism being disruption of photosynthetic activity, overwhelming of the antioxidant system and activation of programmed cell death (PCD). H. akashiwo displayed resistance to 1,2-BD during exposure, and the growth inhibition was mainly attributed to PCD. Therefore, the species-specific allelopathic responses provide new insights for controlling HABs using 1,2-BD and 3-IDC.
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ACS Applied Polymer Materials
·
2023
·
IF 5
Yingying Zhu,Yang Xu,Siqi Chen,Yifan Zhou,Jinyuan Zhu,Geng Chen
Titanium dioxide (TiO2) nanoparticles act as very good nanofillers to prepare the polymeric nanocomposite membranes to tackle the problem of heavy metal pollution in the water body. A key challenge to be solved is to improve their compatibility with organic matrices and dispersion in the material. Herein, (3-aminopropyl)trimethoxysilane-modified TiO2 (APTMS-TiO2) was prepared using coupling agent modification, and APTMS-TiO2 thin-film nanocomposite (TFN) membrane was successfully applied in the forward osmosis (FO) process. Moreover, the effects of different pretreated TiO2, TiO2 dosages, draw solution types, and concentrations on FO membranes were systematically studied. Results showed that APTMS-TiO2 TFN with a TiO2 dosage of 0.05 wt % has the maximal water permeate flux (Jw) (18.14 LMH, 225.09% higher than the control TFC of 5.58 LMH) and the minimum specific reverse solute flux of 0.40 g/L with 1 M NaCl as the draw. Unary (Cu2+ and Ni2+) and binary (Cu2+ + CR and Cu2+ + RhB) high-salt wastewater were applied as the feed to investigate the reusability and dye rejection of the APTMS-TiO2 TFN. The rejection rate of Cu2+ and Ni2+ by APTMS-TiO2 TFN was above 98.00 and 97.00%, respectively, while the rejection rate of Cu2+ + CR and Cu2+ + RhB was 96.87 and 95.83%, respectively, indicating excellent reusability and rejection. The present research finding concludes that the incorporation of APTMS-TiO2 nanosheets in the TFN layer enhances the flux and rejection of targeted mineral salts. Additionally, the APTMS-TiO2 TFN revealed outstanding rejection performance of unary and binary wastewaters, signifying that contact with heavy metals and colored solutes will not affect the performance.
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Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 43
·15294-15302
·
IF 6.4
Tianyu Liu,Bo Yan,Jinxu Ma,Qiang He,Linan An,Kepi Chen
The development of dielectric capacitors for applications under medium-low fields is of great significance to the integration and miniaturization of electronic circuits. Lead-free piezoelectric ceramics based on the morphotropic phase boundary (MPB) compositions have made great progress in the past two decades. In this study, we selected an MPB composition of 0.8525BNT–0.10995BKT–0.03755BT (BBNKT) as the matrix and Sr(Mg1/3Nb2/3)O3 (SMN) as the end member to form relaxor ferroelectric ceramics for energy storage applications. We showed that 0.85BBNKT–0.15SMN ceramics exhibited a recoverable energy storage density Wrec of 3.53 J cm−3 and an efficiency η of 86.3% at a medium-low electric field of 310 kV cm−1. The ceramics also exhibited good thermal stability (25 °C–180 °C), frequency stability (1 Hz–100 Hz), and fatigue resistance (>105 cycles). The current study provided a new idea for the compositional design of energy storage ceramics by modifying the piezoelectric ceramics with MPB compositions into high-entropy relaxor ferroelectrics.
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Advanced Therapeutics
·
2023
·
IF 4.6
Honglin Jia,Qi Yang,Jiahui Hong,Rui Ding,Tao Liu,Qunfang Yang,Haiping Zheng,Qingshan Huang,Zhaowei Zhang,Xiaohong Chen,Renshan Sun,Yunlong Yu,Wenjun Shan
Maintaining the homeostasis of the skin's immune microenvironment is crucial for skin's health. In inflammatory skin conditions (like psoriasis), the immune microenvironment is dysregulated, including ROS accumulation and T cell overactivation. In addition to promoting inflammation and excessive keratinocyte proliferation, ROS upregulation in psoriasis also induces glucocorticoid resistance, which poses a significant challenge to the effectiveness of glucocorticoid treatment (e.g., dexamethasone) in psoriasis. To conquer this problem, we used epigallocatechin-3-gallate (EGCG) to eliminate ROS production in psoriasis. Application of EGCG reduced ROS levels and improved the anti-psoriasis effect of Dexamethasone (Dex) in vitro. Benefiting from the unique characteristics of microneedle for transdermal drug delivery, we construct a dissolvable microneedle (MN) patch containing EGCG and Dex (DEX/EGCG-MN), which can directly codelivery the two elements to the lesion area without stratum corneum barrier. Our MN alleviates psoriasis-like manifestations in imiquimod (IMQ)-induced psoriasis mouse model, indicated by epidermal thickness and dorsal skin signs. Besides, DEX/EGCG-MN corrected the disorder of immune cells, including innate and acquired immune cells. As a result, it mediates the balance in the skin's immune microenvironment. Meanwhile, our MN also ameliorated the hyperproliferation of keratinocytes in psoriatic lesions. We believe this approach may offer insights for further developing anti-psoriasis assays. This article is protected by copyright. All rights reserved
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ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Sitong Liu,Guangmin Ren,Xiangchao Meng
A BrO3–-modified Bi2O3/Bi(OH)3 heterojunction photocatalyst was in situ fabricated by a facile one-pot method and applied in photocatalytic nitrogen fixation. In comparison with Bi(OH)3, the Bi2O3/Bi(OH)3 heterojunction has a larger specific surface area from the nanoflower-like morphology and an extended visible light absorption range. Of special importance, the proper band gap match between Bi(OH)3 and Bi2O3, the multiple charge transfer channels via the BrO3– bridge, and the oriented electron migration in the type-II heterojunction mechanism make a stronger charge separation efficiency. Therefore, the BiO/BiHO-3 sample presented the highest photocatalytic nitrogen reduction performance with an ammonia production rate of 45.28 μmol g–1 h–1, which was 10 times higher than that of Bi(OH)3. Photogenerated cavities are consumed during H2O oxidation to produce O2 and H2O2. However, the O2 production was small, and the H2O2 yield was about 78.5 μmol g–1 h–1. For CO2 reduction, the CO production rate was 52.86 μmol g–1 h–1, which was 1.6 and 1.9 times those of Bi(OH)3 and Bi2O3. This work provides useful guidance for the design and synthesis of efficient catalysts for photocatalytic N2 fixation.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Wei Liu,Yuanxun Li,Xinyan Liu,Yongcheng Lu
In millimeter-wave communication, signal delay becomes increasingly pronounced as the operating frequency of the equipment rises. To accelerate signal transmission, substrates with low dielectric constants (ε r < 6) are required. This study synthesized a novel microwave dielectric material, NaMg (1- x ) Zn x (PO 3 ) 3 (NMZPO), using the conventional solid-phase method. The microwave dielectric properties of NaMg(PO 3 ) 3 ceramics were enhanced by substituting Mg 2+ with Zn 2+ . Specifically, Zn 2+ doping increased the ceramics' densification and reduced dielectric loss. The NaMg 0.9625 Zn 0.0375 (PO 3 ) 3 ceramic exhibited optimal microwave dielectric properties at sintering temperature 880 °C for 4h: ε r = 4.49, Q × f = 58237.2 GHz (at 17.792 GHz), τ f = −50.6 ppm/°C. In addition, NMZPO ceramics demonstrate excellent chemical compatibility with Ag electrodes. These findings indicate that NMZPO represents a promising candidate for the next generation of ultra-low dielectric constant LTCC materials.
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