TALANTA
·
2023
·
IF 6.1
Chen Cui,Xinyao Lin,Jie Lv,Hang Guo,Lu Shen,Guoqiang Xiang,Wenjie Zhao,Dechen Jiang
Designing innovative electrochemiluminescence (ECL) immunosensors is critical for the detection of biomarkers with a low concentration and the precise evaluation of clinical diseases. Herein, a Cu 3 (hexahydroxytriphenylene) 2 (Cu 3 (HHTP) 2 ) nanoflake-based sandwich-type ECL immunosensor was constructed for C-Reactive Protein (CRP) detection. The Cu 3 (HHTP) 2 nanoflake , an electronically conductive metal–organic framework (MOF), has a periodically arranged porous structure with a cavity size of 2 nm, which not only accommodates a large amount of Ru(bpy) 3 2+ but also confines the spatial diffusion of active species. Therefore, the Ru(bpy) 3 2+ -loaded Cu 3 (HHTP) 2 nanocomplex (Ru@CuMOF) as an ECL emitter exhibits an enhanced ECL efficiency. The ECL resonance energy transfer (ECL-RET) was accomplished by combining Ru@CuMOF used as a donor with gold nanoparticles-functionalized graphene oxide nanosheets (GO-Au) utilized as an acceptor. This should be ascribed to the fact that the ECL emission spectrum of Ru@CuMOF shows the strongest signal intensity at 615 nm, overlapping with the absorption spectrum of GO-Au at 580–680 nm. Targeted detection of CRP in human serum samples was achieved by the sandwich-type immunosensor based on the ECL-RET mechanism with a 0.26 pg mL −1 detection limit. The electro-activated hybrids of Cu 3 (HHTP) 2 and ECL emitters provide a new sensing strategy for the high-sensitivity detection of disease markers.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Wentao Wang,Xiang Li,Ruyi Wang,Jingjing Wang,Hongxia Deng,Shanshan Tong
The scarcity and economic importance of gold has motivated the researchers to develop novel and efficient adsorbents to the increase of recycling from secondary waste streams. In this work, the three-dimensional (3D) Ti 3 C 2 MXene-POSS/V 2 O 3 @C aerogel (MPVA) with orderly network structure was fabricated by the interfacial assembly of MXene and freezing-induced preassembly. The new MPVA hybrid exhibited ultrafast kinetics (only 10 min to reach equilibrium), selectivity, and excellent trapping capacity for Au (III) , owing to the reductive capture mechanism. The Langmuir model was used to describe the capture of Au (III) delivered by MPVA, achieving the maximum capture capacity of 1425.4 mg g −1 at 298 K. Moreover, MPVA displayed extremely high trapping efficiency (>99.9%) at 273 K, which suggests that this composite is promising for capturing Au (III) in cold temperatures. MPVA also shows good reusability after ten cycles. The results indicate that MPVA has great potential for efficient capturing from complex and cold aqueous solutions.
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高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Zongwei Guo,Zhao Wang,Jiajun Ma,Lin Jin,Yuhui Ao
Introducing two-dimensional (2D) nanoreinforced materials on the surface of carbon fibers (CFs) is a promising strategy for overcoming the chemical inertness of CFs. However, disordered alignment and uneven dispersion of 2D nanoreinforced materials on the CF surface are the most critical issues that must be addressed. Herein, MXene (M) was functionalized using graphene oxide (G) to produce intercalated 2D reinforcement materials, and robust Ti–O–C covalent bonds were introduced to ensure that M and G have strong binding forces. An interface layer with a more ordered and compact “brick-and-mortar” structure was developed on the CF surface to obtain CF composites with high strength and toughness. Owing to the structure superiority, robust Ti–O–C covalent bonding, and abundant π–π interactions, the optimal CF composites achieved high strength and toughness, with a tensile strength of 1587 MPa and a toughness of 45 MJ m–3. Meanwhile, the interlaminar shear and flexural strengths increased to 82 and 1178 MPa, respectively. The reinforcing mechanisms of the unique interface layer on CF composites were systematically investigated via data analysis and modeling. This study provides a constructive design inspiration for fabricating high-performance CF-reinforced polymer composites, considerably expanding their applications.
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高影响因子
Molecular Catalysis
·
2023
·
IF 4.6
Mengyu Dou,Yan Qiao,Xu Hu,Hengyang Miao,Ligong Zhou,Xuekuan Li,Xianglin Hou,Yingxiong Wang,Mingxing Tang
The poor textural properties of initial biochar materials have hindered their extensively applied as catalyst supports. Herein, cellulose biochar materials with the gradient porous and high specific surface area were synthesized by adding different ratios of ZnCl 2 , and as supports to prepare Pd/C cel catalysts for efficient maleic acid hydrogenation in water. The characterization results indicated that the textural propertiesand dispersion of Pd in Pd/C cel catalysts depended on the ratio of ZnCl 2 to cellulose. The Pd/C cel ZnCl 2(1:3) catalyst exhibited the best catalytic activity among all catalysts and outstanding stability for reusing 8 times under mild conditions (60 °C, 2 MPa). In addition, this synthesis strategy was also suitable for other biomass materials (glucose, sucrose, and starch) and the catalytic performance of ZnCl 2 -modified Pd/C catalysts in maleic acid hydrogenation reaction also improved dramatically. The carbonization mechanism was discussed by TG-MS and the results illustrated that ZnCl 2 reduced the carbonization temperature and altered the pyrolysis behavior of biochar as a result of excellent catalytic behavior. This work provided a facile and universal strategy for synthesizing biochar high-efficient supported catalysts with gradient porous structure and high specific surface area.
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高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Yanli He,Shuguang Shen,Ying Wang,Chenyuan Guo,Yaping Yuan,Yaru Fan,Lili Zhang,Yuyan Song
A simple and low-cost method for the synthesis of α -MnO 2 /C catalyst was proposed, in which KMnO 4 was reduced in-situ by cellulose in urea solution. The heterogeneous catalytic degradation of urea wastewater were carried out over α -MnO 2 /C. The effect of KMnO 4 -urea solution concentration on the structure and performance of the catalysts was investigated. The results indicate that δ -MnO 2 tends to curl and collapse into tunnel structure of α -MnO 2 as the concentration of KMnO 4 -urea solution increases, leading to α -MnO 2 is evenly distributed on carbon carrier. When the concentration of KMnO 4 -urea solution is appropriate, the catalyst has not only a large specific surface area but also high oxygen vacancy density, which is the key to be able to completely degrade the urea process wastewater. The reaction kinetics show that the catalytic hydrolysis of urea behaves as a pseudo-first-order reaction. A possible catalytic mechanism of urea hydrolysis over α -MnO 2 /C was proposed. In addition, the reusability experiments show that the α -MnO 2 /C catalyst has a good recycling ability.
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高影响因子
Journal of Functional Foods
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2023
·
IF 5.6
Rui Zhang,Xudong Lin,Ying Song,Yanfeng Tuo,Guangqing Mu,Shujuan Jiang
Constipation is a common intestinal disease and is correlated with gut microbiota dysbiosis. Given that current drug treatments can cause side effects, probiotics treatment may be a promising alternative approach. In this study, four strains of Lactiplantibacillus plantarum which have the ability to alleviate intestinal inflammation were selected, including L. plantarum AHQ-14, HM-22 isolated from Xinjiang dairy products, and L. plantarum Y12, Y44 isolated from turbot intestine in Dalian market. The effects of L. plantarum strains on loperamide-induced constipation in mice were measured and the potential mechanisms were illustrated by constipation and physicochemical indexes, histological morphology, metabolites and microbiota composition analysis. The results of this study suggested that L. plantarum Y44 could somewhat relieve the symptoms in mice with constipation, while it could not relieve constipation by improving gastrointestinal regulatory peptides and 5-HT levels. The study also found that L. plantarum AHQ-14, HM-22 and Y12 significantly increased the fecal water content and improved GI motility, regulated the levels of gastrointestinal regulatory peptides and 5-HT, and increased the concentration of short-chain fatty acids (SCFAs) on fecal in constipated mice. Furthermore, L. plantarum AHQ-14, HM-22 and Y12 significantly altered the microbiota flora of constipated mice by increased the abundance of potentially beneficial bacteria (e.g. Lactobacillus and Alistipes ) and decreased potentially pathogenic bacteria (e.g. Erysipelatoclostridium and Helicobacter ). These results suggested that L. plantarum AHQ-14, HM-22 and Y12 could effectively relieved constipation in mice by loperamide-induced and have potential application value in constipation treatment.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
·
IF 8.6
Yaoyu Zhou,Jianlong Wang
Developing high performance electrocatalysts for effective antibiotics elimination for heterogeneous electro-Fenton (Hetero-EF) process is still a challenge. This work synthesized iron/cobalt bimetallic N doped graphitic carbon cages (Fe x Co@NC) from ZIF-8@ZIF-67-Fe dual MOF composite for Cephalosporin C (CEP-C) degradation in the Hetero-EF system at a wide pH range. Results indicated that CEP-C degradation rate and total organic carbon (TOC) removal efficiency by Fe 40 Co@NC catalyst were as high as 82.45% (60 min) and 61.35% (240 min) at natural pH, respectively. The unique structure with FeCo bimetal encapsulated inside the N doped graphitic carbon cages enabled Fe 40 Co@NC to show excellent catalytic reactivity for H 2 O 2 activation. The generated M (•OH) and •OH all contributed to CEP-C degradation. The synergistic effects of Co 0 /Co 2+ /Co 3+ and Fe 0 /Fe 2+ /Fe 3+ cycles made Fe 40 Co@NC catalyst to continuously activate H 2 O 2 . Moreover, Fe 40 Co@NC catalyst showed good stability in consecutive cycles, and could still remain excellent reactivity when applied for CEP-C degradation from the real CEP-C fermentation residue supernatant. Furthermore, a possible CEP-C degradation pathway was proposed based on the identified intermediates.
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高影响因子
International Journal of Electrochemical Science
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2023
·
IF 1.5
Hui Yao,Wan-ting Zhang,Ting-yu Yan,Xiao-qin Li,Xiao-feng Wang
Metal-Organic Frameworks (MOFs) are promising materials in electrochemical sensor. Herein, Cu-doped zeolitic imidazolate framework (ZIF) was synthesized by hydrothermal method. The prepared composite was characterized by XRD, FTIR and SEM. Then the material was modified onto the surface of glass carbon electrode (GCE) with chitosan(CHIT) and Cytochrome C (cyt c ). The modified electrode showed good electrochemical activity toward the reduction of hydrogen peroxide (H 2 O 2 ). Under optimized conditions, the linear response of the sensor to H 2 O 2 ranges from 10～5200 μM, with a detection limit of 3.7 μM (S/N=3). Finally, the sensor was successfully applied to determine H 2 O 2 in water samples. Thus, the Cu-doped ZIF material has great potential for applications in electrochemical sensors.
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高影响因子
ChemistrySelect
·
2023
·Vol. 8
·期 16
·e202300233
·
IF 2.1
Yang Ling,Yan Peng,Shiyou Guan
Graphical Herein, a series of SiO x /C composites with uniform carbon distribution were prepared by sol-gel method and subsequent pyrolysis process, the carbon content can be easily adjusted just by selecting different organosilanes. Particularly, when BTEB was used as the raw materials, due to the uniformly dispersed of carbon at nanoscale and the appropriate carbon content, the SiO x /C−B exhibited excellent electrochemical performance in LIBs. SiO x /C composites with uniform distribution of silicon oxide (SiO x ) and carbon are promising anodes for lithium-ion batteries. However, designing the SiO x /C composites with uniformly dispersed of carbon at nanoscale and controllable carbon content is still a challenge. Herein, a series of SiO x /C composites with uniform carbon distribution were prepared by sol-gel method and subsequent pyrolysis process, the carbon content can be easily adjusted just by selecting different organosilanes. Due to the uniformly dispersed of carbon at nanoscale, the obtained products showed the excellent energy storage performance. Particularly, when Bis(triethoxysilyl)benzene (BTEB) was used as the raw materials, due to the appropriate carbon content, the SiO x /C−B exhibited a high reversible capacity of 535 mAh g −1 at 0.1 A g −1 over 100 cycles. The cycle stability is preserved even after 300 cycles at a high current density of 1.0 A g −1 , where the electrodes still supply a specific capacity of 389.7 mAh g −1 .
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Lixia Jia,Qi Zhou,Yuanwei Li,Weizhong Wu
In this study, Mn-C composites using different MnO 2 contents and solid carbon material were prepared to explore the synchronous removal performance of nutrients and SMX. Higher nitrate removal performance (97–98 %) with quickest nitrate removal rate (4.97 mg N L -1 h −1 ) was obtained in Mn_20 systems. The increased Mn content and Mn-P compound were observed via surface characteristics, indicating the involvement of MnOx in pollutants removal , particularly for higher phosphorus removal (84–89 %) via Mn-P precipitation and BioMnOx adsorption. Nevertheless, compared to systems based on Mn_0 composites (74 %), systems with Mn-C composites presented lower SMX reduction efficiency (34–51 %), which might be attributed to the large Mn(II) accumulation, impairing certain microbes and lower the MnOx function. Higher abundance of genera affiliated to Bacteroidetes_vadinHA17 and Rhodocyclaceae was observed in the Mn-C composites, as well as the gathering of Geobacter and Desulfovibrio as keystone taxa, responsible for the removal of nitrate and SMX and microbial interactions. Besides, the increase of sulfonamide ARGs was closely related to the predominant microbes in the Mn-C composites, which acted as the hosts of ARGs. This study broadens the knowledge of Mn-C composites in synergetic removal of nutrients and organics, and supports the potential application of manganese oxide in wastewater treatment.
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高影响因子
Catalysts
·
2023
·Vol. 13
·期 4
·726
·
IF 3.9
Jun Qiao,Kai Zheng,Zhiwei Lin,Huiye Jin,Wenbo Yu,Chao Shen,Aiquan Jia,Qianfeng Zhang
The exploration of inexpensive and stable heterogeneous catalysts for C–S coupling reactions remains a challenging issue. Herein, we successfully prepared a new biomass-derived copper catalyst and applied it to the selective C(sp3)–H-directed sulfonylation of ketone hydrazones with commercial sodium sulfinates. The catalyst was characterized using different spectroscopic and microscopic techniques. Importantly, the prepared biomass-supported Cu catalyst catalyzed the C–S coupling reaction with considerably high activity. A variety of aryl and alkyl sulfinates were converted to the corresponding sulfones with good yields. In particular, the heterogeneous catalyst could be recovered easily after the synthesis and consecutively used at least five times with no appreciable decrease in the catalytic activity. Lastly, the copper catalyst is expected to have further applications in organic reactions catalyzed by Cu/CuO2.Keywords:biomass-derived;copper catalysts;heterogeneous;C–S coupling
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Lifeng Zhang,Jiaxi Bai,Yaoxin He,Bangmei Lu,Liyue Xue,Xingang Kong,Shouwu Guo
Developing flexible and binder-free electrodes with superior electrochemical performance is the critical key for flexible electronics and wearable devices . MoTe 2 , a typical two-dimensional (2D) layered material, has emerged as an attractive anode material for sodium ion batteries (SIBs) because its abundant active sites and rapid Na + transfer and storage. In this work, a series of flexible MoTe 2 /C nanofibers (NFs) are successfully synthesized via a facile electrospinning process with tellurization treatment. As binder and current collector-free anodes, the optimized MoTe 2 /C-600 shows significantly enhanced Na + storage performance, which delivers a high reversible capacity of 294 mAh g −1 after 100 cycles at 0.1 A g −1 and an ultra-long time cycling performance of 5000 cycles at 1.0 A g −1 . The as-prepared MoTe 2 /C NFs possess double merits of well 1D conductive paths and 3D ion diffusion channels, which effectively boost the electron/Na + transfer. Meanwhile, its excellent flexibility and mechanical strength greatly enhance the cycling stability. More importantly, in-situ X-ray diffraction and ex-situ transmission electron microscope were employed to demonstrate its structure evolution, revealing that the high capacity of MoTe 2 /C-600 results from the cooperation of Na + intercalation and conversion reaction. The findings of this study provide a better understanding on the sodium storage mechanism of MoTe 2 -based flexible electrodes.
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高影响因子
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