JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Jia Guo,Xiaowen Yin,Tao Wang,Jing Feng,Peng Zeng,Dongling Wu
In this work, N/B codoped hierarchical porous carbons (BNCs) were prepared by the polymerization reaction in an amino acid-urea deep eutectic solvent (DES) and carbonization process. During the polymerization process, amino acid-urea DES not only acts as a structure directing agent, but also as the reaction solvent to ensure homogenization of the reagents and promote polymerization of reaction monomer. Specifically, l -aspartic acid and urea composed DES were used as monomers and reacted with formaldehyde and boric acid, after the high temperature carbonization the BNCs were obtained. The optimized materials of BNC-900-3, which possesses high nitrogen (N) content (11.51 at%) and boron (B) content (7.01 at%), exhibits an excellent electrochemical performance with a specific capacitance (330 F g −1 at a current density of 1.0 A g −1 ) in 6 M KOH electrolytes and displays a long-term cycling stability with 91% after 80,000 charge–discharge cycles. Meanwhile, the assembled symmetric solid KOH/PVA supercapacitor exhibits an energy density of 13.5 Wh kg −1 . In addition, a new DES electrolyte was prepared, which also uses DES composed of l -aspartic acid and urea. The fabricated DES electrolyte based symmetric capacitor exhibits a large energy density of 14.5 Wh kg −1 at a power density of 398.8 W kg −1 . This work provides a new way for the preparation of porous carbon not only using DES as a precursor but as an electrolyte, and also demonstrates its possible application in supercapacitor electrode materials.
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高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Mengfei Zhu,Yuepeng Pang,Fuqiang Lu,Xinxin Shi,Junhe Yang,Shiyou Zheng
Li–B–H complexes facilely prepared via partial dehydrogenation of LiBH4 are presented in this study as solid electrolytes for Li batteries. An exceptionally high Li-ion conductivity is found for the Li–B–H complex with 7.5 wt % H2 desorption under 3 bar H2 pressure, which reaches 2.7 × 10–4 S cm–1 at 35 °C, more than 4 orders higher than that of LiBH4. In-depth characterizations show that LiH and [Li2B12H11+1/n]n are in situ formed in the LiBH4 matrix and the interface layer between [Li2B12H11+1/n]n and LiBH4 is believed to be responsible for the high Li-ion conductivity. Moreover, this Li–B–H complex also exhibits excellent electrochemical stability, which enables the stable cycling of all-solid-state batteries at room temperature.
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Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 30
·9692-9701
·
IF 7.393
Jingwei Liu,Yanjie Liang,Shao Yan,Dongxun Chen,Shihai Miao,Weili Wang,Jianqiang Bi
Ultraviolet (UV) luminescent materials hold great promise for applications across a wide range of fields, such as environmental, biological and medical fields. However, luminescent materials with the capability to continuously emit UV light for minutes or hours after ceasing the excitation are relatively lacking, although such phosphors are highly desired for some new important applications. Here, we report a series of Bi3+-doped garnet persistent phosphors that exhibit strong ultraviolet-B (UVB) persistent luminescence peaking at ∼313 nm and a long persistence time of more than 60 h. Remarkably, these persistent phosphors can be repeatedly charged by natural sunlight under any weather conditions, at any moment between sunrise and sunset during the day, and in various aqueous media. Minutes of natural sunlight irradiation can result in hours (>12 h) of persistent UVB light emission. Benefitting from the exceptional self-sustained UVB luminescence performance, and an optical signal outside of the visual spectrum, together with the avoidance of interference from ambient light, these materials show high promise for covert optical tagging applications. More importantly, the UVB persistent luminescence under the excitation of natural sunlight found in this study is expected to inspire the discovery of more excellent sunlight-activated UV persistent phosphors.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Shibo Wu,Jingrui Cao,Yang Zhou,Jiahao He,Jiangjie Zhou,Muslum Demir,Hongye Yang,Zaizai Tong,Pianpian Ma
High-entropy perovskite oxides, an emerging electrocatalytic electrode material, integrates the distinctive features of high-entropy materials and perovskites, offering significant potential in electrocatalysis. While adjusting the B-site elements has been a widely adopted approach for modulating the electrocatalytic activity of HEPs, there was a notable lack of systematic investigations into the role of A-site ions in regulating their electrocatalytic performance. To overcome this deficiency, in the present study, La 1-x Na x (CrMnFeCoNi) 1/5 O 3 HEPs were synthesized using carbon nanotubes-based sacrificial template method. It was found that the Na substitution at the A-site not only significantly reduced the synthesis temperature but also facilitated the preservation of carbon nanotubes. This retention contributed to the formation of a three-dimensional network structure, exposing a greater number of active sites. The Na modification induced significant valence fluctuations at the B-site and tailored the oxygen vacancy concentrations, enhancing the synergistic "cocktail effect" among the various metal atoms. Furthermore, the introduction of Na stimulated the formation of surface M-OOH species, which serve as active intermediates to enhance OER activity. As a result, the Na-modified HEPs demonstrated exceptional OER performance compared to their parent phases. Among these, La 0.6 Na 0.4 (CrMnFeCoNi) 1/5 O 3 (L6N4-5M) sample exhibited a lower overpotential of 313 mV at a current density of 10 mA cm −2 and a Tafel slope of 47.4 mV dec −1 . Additionally, the A-site Na modification strategy and the in-depth investigation of the OER mechanism provide valuable insights for the future design and development of high-performance HEP electrocatalysts.
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高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Wujie Ge,Yuanxiang Fu,Chaonan Wang,Lirong Yan,Qi Feng,Bing Yan,Xiang Li
The high-nickel cathode material LiNi 0.865 Co 0.095 Al 0.04 O 2 (NCA) has garnered significant attention due to its high energy density and cost-effectiveness in production. However, this material is also prone to rapid capacity degradation, primarily due to phase transitions occurring during the redox process. In this paper, the co-modification with Na and B cations is employed to stabilize the lattice structure and enhance the electrochemical performance of the NCA material. It can be found that the incorporation of Na and B cations in the lattice can reduce cation mixing, expand the Li-layer spacing and improve crystal stability, thereby increasing the specific capacity and cyclic stability of the NCA material. Specifically, the co-doped NCA-2 sample exhibits a specific capacity of 202.1 mAh/g at 0.1 C and maintains a capacity retention of 78.75 % at 1 C after 300 cycles, representing a substantial improvement over the pristine material (187.2 mAh/g and 61.68 % capacity retention). Moreover, at a current density of 10 C, the co-doped NCA-2 sample demonstrates a high specific capacity of 133.9 mAh/g, compared to 110.1 mAh/g for the pristine material. The Na/B co-doping strategy presented in this study offers a straightforward method to improve the cyclability and rate behavior of cathode materials, highlighting its potential for commercial applications.
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JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
·
2025
·Vol. 105
·期 7
·3931-3941
·
IF 3.5
Jiawei Zheng,Qiangyue Zhang,Nanjing Zhong
BACKGROUND Immobilized enzyme possessing both high activity and good selectivity is important in practice. In this study, Candida antarctica lipase B (CALB) was immobilized onto the macroporous resin ADS-17 for triacylglycerol (TAG) synthesis through esterification of oleic acid and glycerol. The reaction conditions were optimized by single-factor study and orthogonal test, and the reusability of the immobilized CALB (CALB@ADS-17) was evaluated. In addition, the mechanism of lipase immobilization was studied and the catalytic mechanism of CALB@ADS-17 was investigated. RESULTS Oleic acid conversion up to 99.20% and TAG content at 91.58 wt% could be obtained under optimal conditions. In addition, the CALB@ADS-17 retained 84.28% of its initial activity after 11 cycles of reuse. The mechanism of lipase immobilization was through hydrophobic adsorption. The relationship between temperature and oleic acid conversion was ln V 0 = 6.3316 − 4.3321/ T , and the activation energy ( E a ) was 36.02 kJ mol −1 . CALB@ADS-17 did not exhibit an obvious interfacial activation phenomenon. Its kinetic behavior can be described by the Michaelis–Menten model, whose kinetic parameters of v max , k cat , K m , K i , and k ca t /K m were 0.01265 μmol L −1 s −1 , 9310.72 s −1 , 0.4907 mmol L −1 , 3.997 mmol L −1 , and 1.90 × 10 4 L mmol −1 s −1 , respectively. CONCLUSION CALB@ADS-17 showed good esterification performance and exhibited good selectivity towards TAG generation. In addition, CALB@ADS-17 exhibited good reusability in esterification reactions and has potential in practical applications. © 2025 Society of Chemical Industry.
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DOI
PubMed
高影响因子
Frontiers of Environmental Science & Engineering
·
2021
·Vol. 16
·期 3
·1-16
·
IF 4.357
Zhao Shuangyang,Chen Chengxin,Ding Jie,Yang Shanshan,Zang Yani,Ren Nanqi
Fabrication of easily recyclable photocatalyst with excellent photocatalytic activity for degradation of organic pollutants in wastewater is highly desirable for practical application. In this study, a novel ternary magnetic photocatalyst BiVO 4 /Fe 3 O 4 /reduced graphene oxide (BiVO 4 /Fe 3 O 4 /rGO) was synthesized via a facile hydrothermal strategy. The BiVO 4 /Fe 3 O 4 with 0.5 wt% of rGO (BiVO 4 /Fe 3 O 4 /0.5% rGO) exhibited superior activity, degrading greater than 99% Rhodamine B (RhB) after 120 min solar light radiation. The surface morphology and chemical composition of BiVO 4 /Fe 3 O 4 /rGO were studied by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, UV visible diffuse reflectance spectroscopy, Fourier transform infrared spectroscopy, and Raman spectroscopy. The free radicals scavenging experiments demonstrated that hole (h + ) and superoxide radical (O 2 •− ) were the dominant species for RhB degradation over BiVO 4 /Fe 3 O 4 /rGO under solar light. The reusability of this composite catalyst was also investigated after five successive runs under an external magnetic field. The BiVO 4 /Fe 3 O 4 /rGO composite was easily separated, and the recycled catalyst retained high photocatalytic activity. This study demonstrates that catalyst BiVO 4 /Fe 3 O 4 /rGO possessed high dye removal efficiency in water treatment with excellent recyclability from water after use. The current study provides a possibility for more practical and sustainable photocatalytic process.
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RSC Advances
·
2015
·Vol. 5
·期 121
·99664-99668
·
IF 3.84
Zheng Tang,Xiao-Ling Ding,Ying Liu,Zhi-Min Zhao,Bao-Xiang Zhao
We have developed a novel fluorescent probe (RBT) based on rhodamine B and benzothiazole hydrazine units for the detection of hypochlorite in living cells and real water samples with excellent selectivity and sensitivity. In the presence of hypochlorite in a mixture solution of MeCN–PBS (v/v = 3 : 7, pH = 7.4) at room temperature, the fluorescence intensity of RBT increased by 350 fold with the color change from colorless to red. The detection limit of the probe for hypochlorite is 1.06 × 10−9 M. Moreover, RBT was successfully used to image endogenous hypochlorite in living cells and detect hypochlorite in real water samples.
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高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2019
·
IF 4.745
Shanjian Mao,Yinbo Wan,Haiyun Peng,Li Luo,Guisheng Deng
Pd(PPh3)2Cl2-catalyzed selective tandem cyclization/oxidation of available conjugated diazo ene-yne-ketones under O2 atmosphere led to the formation of diazo trisubstituted furans. The Rh2(OAc)4-mediated selective C(sp2)–H insertion at the ortho-position of 2-aryl group (R1) of the furan moiety under N2 atmosphere occurred to construct naphthalene cycle, affording trifunctionalized naphtho[1,2-b]furans. C(sp2)–H insertion at the 4-position of the furan ring, and Wolf rearrangement of diazo moiety have not been observed.
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高影响因子
HELICOBACTER
·
2023
·
IF 4.4
Zelin Zhang,Xingchi Chen,Bin Li,Tingting Xia,Xiaobin Wu,Chao Wu
Background Urease subunit B (UreB), a conserved and key virulence factor of Helicobacter pylori ( H. pylori ), can induce the host CD4 + T cell immune responses to provide protection, but less is known regarding CD8 + T cell responses. The characteristics of H. pylori -specific CD8 + T cell responses and the mechanism underlying antigen processing and presentation pathways remain unclear. This study was focus on protective antigen recombinant UreB (rUreb) to detect specific CD8 + T cell responses in vitro and elucidate the mechanism of UreB antigen processing and presentation. Methods The peripheral blood mononuclear cells (PBMCs) collected from H. pylori -infected individuals were stimulated with rUreB in vitro to detect specific CD8 + T cell responses after co-culture with rUreB-pulsed autologous hMDCs. Through blocking assay, we investigated the potential pathway of UreB antigen processing and presentation via the cytosolic pathway or vacuolar pathway. The cytokines production of UreB specific CD8 + T cell were evaluated as well. Results We demonstrated UreB can induce specific CD8 + T cell immune responses in H. pylori infected individuals. Importantly, we characterized that UreB were mainly processed by proteasome instead of lysosomal proteases and presented through cytosolic pathway of cross-presentation, which requires endoplasmic reticulum–Golgi transport and newly synthesized MHC-I molecules, to induce functional-specific CD8 + T cell (IFN-γ + TNF-α + Grz A+ Grz B+) responses. Conclusions These results suggest that H. pylori UreB induces specific CD8 + T cell responses through cytosolic pathway of cross-presentation in infected individuals.
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PubMed
高影响因子
JOURNAL OF FOOD SCIENCE
·
2018
·Vol. 83
·期 2
·565-573
·
IF 2.018
Lingying Luo,Yun Bai,Guanghong Zhou
3-Amino-1,4-dimethyl-5H-pyrido[4,3-b]indole (Trp-P-1) is a group 2B carcinogen characterized by the International Agency for Research on Cancer (IARC) and great efforts have been taken to reduce Trp-P-1 mutagenicity to humans. In this study, the effect of a reduction of Trp-P-1 on intestinal absorption as a promising strategy was investigated. The data showed that when 20 mM Trp-P-1 cotransported with 10 mM of sodium carboxymethyl cellulose (CMC), xanthan gum, or carrageenan, the absorption rate of Trp-P-1 was reduced by 31.5%, 49.5%, or 72.9% in MDCK-MDR1 cell monolayer, respectively; and 64.6%, 83.4%, or 64.1% in rat intestinal tissues, correspondingly. These 3 polysaccharides also reduced pharmacokinetic parameters, that is, C max , AUC 0-t , and AUC 0-∞ , after Trp-P-1 was given to rats intragastrically. However, gum arabic did not exhibit similar effects on Trp-P-1 absorption in vitro or in vivo . The Ames test showed that these 3 polysaccharides reduced Trp-P-1 mutagenicity to Salmonella typhimurium TA98, but gum arabic did not. Isothermal titration calorimetry assay indicated that Trp-P-1 interacted with these 3 polysaccharides. Thermodynamic study showed that the actual value of △ H <0, but its absolute value greater than the corresponding value of T∆S, suggest a specific interaction between Trp-P-1 and these 3 polysaccharides, probably through the hydrogen bond and/or ion interaction. Reduction of Trp-P-1 intestinal absorption using food additives could be one of the strategies to suppress Trp-P-1-induced carcinogenesis in human. Practical Application 1. This study provides insightful information for the food industry how gum arabic, xanthan gum, kappa carrageenan, and sodium carboxymethyl cellulose affect the absorption of Trp-P-1. 2. This study also provides novel information regarding a better formulation for meat products to reduce Trp-P-1 absorption.
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EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
·
2022
·
IF 7.088
Li-An Shen,Xinyan Peng,Ya Bao,Chenglong Liu,Hao Zhang,Jianqi Li,Di Zhu,Qingwei Zhang
The β -catenin/B-cell lymphoma 9 (BCL9) protein-protein interaction (PPI) is a potential target for the suppression of hyperactive Wnt/ β -catenin signaling that is vigorously involved in cancer initiation and development. Herein, we first described quercetin and its derivatives had potential inhibitory effects on β -catenin/BCL9 PPI. The most potent compound, quercetin-3′- O -(4-methylpiperazine-1-yl) propyl ( C1 ), directly binded with β -catenin and disrupted the β -catenin/BCL9 interaction in both the protein level and the cellular context. C1 also effectively inhibited colorectal cancer in vitro and showed better selectivity in inhibiting hyperactive Wnt/ β -catenin signaling cells like CT26 and HCT116. And we further confirmed that C1 could inhibit CT26 tumor growth in vivo and regulate the tumor immune microenvironment. This study provides a good chemical probe to explore β-catenin-related biology and a drug-like quercetin derivative as novel β -catenin/BCL9 PPI inhibitors for further drug development.
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高影响因子
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