CHINESE JOURNAL OF CHEMISTRY
·
2022
·Vol. 40
·期 13
·1585-1591
·
IF 5.56
Wenming Zhang,Xiaoyu Chen,Haoshan Xu,Yiqun Liu,Xiaohui Zhao,Zisheng Zhang,Ling Li
Comprehensive Summary In recent years, the anode materials of bismuth(Bi)-based potassium ion batteries with high theoretical capacity and suitable potassium ion insertion potential have attracted extensive attention. However, due to the volume expansion of Bi, the performance of Bi-based anode materials is not ideal during potassium ion (de)intercalation. In order to solve these problems, we report a three-dimensional (3D) ternary bismuth nanoparticles/conductive polymers/carbon nanotubes (Bi/PPy/CNT) hybrid anode material for K-ion batteries. At a current density of 100 mA·g –1 , its reversible capacity reaches 302 mAh·g –1 after 200 cycles, while it reaches 195.7 mAh·g –1 after 600 cycles at 1 A·g –1 . Its excellent performance is attributed to the hydrogel network which provides a range of electron transport networks and high porosity. Carbon nanotubes are used as electron enhancers to reduce the volume expansion of Bi particles during the reaction. This study provides a prerequisite for expanding the application of 3D ternary materials.
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Analytical Methods
·
2022
·Vol. 14
·期 41
·4127-4132
·
IF 3.532
Lei Jiang,Lin Yuan,Ze Liu,Yingying Xiang,Fei Song,Lifen Meng,Yujiao Tu
Colorant tartrazine is widely used in the food industry, but its long-term and excessive consumption is harmful to human health. Therefore, it is necessary to establish a sensitive detection method for tartrazine. Blue fluorescent carbon dots with L-arginine and o-phenylenediamine as precursors, namely L-Arg/oPD-CDs, were prepared via the hydrothermal method. Then, L-Arg/oPD-CDs were further purified by dialysis, thin layer chromatography and column chromatography. A dual-mode nanosensor based on fluorescent and UV absorption was successfully developed. Excellent linear ranges of 0–5 μM and 10–50 μM were obtained with a low detection limit of 42.3 nM based on fluorescence. A good linear range of 0–50 μM was obtained with a low detection limit of 130.15 nM based on UV absorption. The quenching mechanism of tartrazine towards L-Arg/oPD-CDs fluorescence was the inner filter effect. In addition, a dual-mode nanosensor was used for tartrazine determination in millet, maize flour, carbonated drink, and sugar samples. This study provides new insight into the detection of tartrazine by applying a dual-mode nanosensor.
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PubMed
高影响因子
Sustainable Energy & Fuels
·
2022
·Vol. 6
·期 15
·3658-3668
·
IF 6.813
Xirui Kong,Yichen Kong,Xiaobin Liao,Sheng Liu,Yan Zhao
Lithium–sulfur batteries (LSB) are regarded as one of the next-generation energy storage systems with a high energy density. However, the shuttle effect of lithium polysulfides (LiPSs) and irreversible consumption of the Li anode prevent the practical application of Li–S batteries. In this work, a mixed tetrahydrofuran (THF) and dipropyl ether (DPE) based electrolyte has been optimized for Li–S batteries. Due to the common-ion effect, the LiPS solubility has been significantly inhibited when the sulfur cathode is operating in a concentrated electrolyte containing an optimized solvent system with weak dissolving power. And no self-discharge effect occurred in the cells with these electrolytes during a 10 day storage. Besides, the coulombic efficiency (CE) for Li deposition/stripping has been improved by optimizing the ratio of dual lithium salts. Impressively, Li‖Cu half-cells can run stably for more than 500 cycles with a high CE (>99.3%). For these reasons, a Li–SeSPAN cell with a L1L2TE-1382 electrolyte demonstrates an excellent capacity retention (>94% after 500 cycles) with an ultrathin (50 μm) Li metal anode. With a good compatibility of the optimized electrolyte for both the Li metal anode and sulfur cathode, this work provides a new design strategy for the electrolyte for lithium–sulfur batteries.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Dazhi Gao,Lekai Zheng,Lina Hu,Ying Li,Hui Liu,Yanming Xue,Fang Liu,Jun Zhang,Chengchun Tang
It is of great significance to develop the highly active, durable and inexpensive oxygen reduction reaction (ORR) electrocatalysts for fuel cells and metal-air batteries . Nitrogen-doped carbon nanotube (NCNTs) was considered to be one of the most significant non-noble metal ORR electrocatalysts, but its catalytic activity has some shortcomings due to its unfavorable ORR intermediates adsorption characteristics. Herein, we report a new kind of nitrogen-doped carbon nanotubes, which have filled with Fe 3 C nanowires (NCNTs@Fe 3 C NWs), working as a stable and effective ORR catalyst. The half-wave potential of the obtained catalyst in a 0.1 M KOH solution is 0.88 V, which is significantly higher than the pristine NCNTs (0.79 V) and the commercial Pt/C (0.85 V). Compared with NCNTs, the improvement in ORR activity of NCNTs@Fe 3 C NWs can be attributed to the strain effect on the outermost carbon layer due to the high filling of Fe 3 C NWs. Most importantly, NCNTs@Fe 3 C NWs shows higher durability and better methanol tolerance than the commercial Pt/C catalyst. Density functional theory (DFT) calculation shows that the tensile strain can optimize the binding energy of ORR intermediates to a certain extent. This work provides new research ideas for the rational design of high-efficiency carbon-based ORR electrocatalysts through the direction of strain engineering.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Lian Duan,Chi Ma,Fengyan Lou,Jiabin Yin,Le Sang,Jisong Zhang
External mass transfer performance of micropacked bed reactors (μPBRs) with Pd/Al2O3/nickel foam catalysts is investigated by the hydrogenation of α-methylstyrene (AMS). The external mass transfer limitation region for AMS hydrogenation can be determined by means of the apparent activation energy and internal effectiveness factor. Parametric studies for external mass transfer are conducted by varying temperatures, operating pressures, liquid viscosities, gas and liquid superficial velocities, and pore diameters of foam packing. The external volumetric mass transfer coefficients [(ka)OV] of μPBRs with the Pd/Al2O3/nickel foam range from 0.06 to 0.71 s–1. An empirical correlation of (ka)OV is developed. Based on the gas–liquid–solid process analysis, the external mass transfer of μPBRs with the Pd/Al2O3/nickel foam is limited by liquid–solid mass transfer under the experimental conditions. Moreover, μPBRs with the Pd/Al2O3/nickel foam exhibit the best energy efficiency in comparison with that of other multiphase reactors.
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高影响因子
DYES AND PIGMENTS
·
2022
·
IF 5.122
Yingying Xiang,Yujiao Tu,Lei Jiang,Lin Yuan,Ze Liu,Qiang Xie,Xuequan Xiong,Fei Song
As one of the most widely used azo synthetic dyes, long-term consumption of excessive amaranthcan cause a threat to health. It is very urgent to establish high selective and sensitive method for amaranth detection. Orange fluorescent carbon dots utilizing l -methionine and o-phenylenediamine as raw materials, namely S,N-CDs, were prepared via one-step hydrothermal method . Dialysis, thin layer chromatography and chromatographic column were employed for further purification. The purified dual-mode nanoprobe based on fluorescent and UV absorption was successfully established. For fluorescent, excellent linear ranges of 5–70 μM and 110–195 μM were obtained, and low detection limit was 345.22 nM. For UV absorption, excellent linear ranges of 0–155 μM with low detection limit 12.70 nM. It revealed that inner filter effect and static quenching dominated in amaranth quenching the fluorescent of S,N-CDs. Furthermore, the dual-mode nanoprobe could be efficiently applied to determine amaranth in fruit juice, carbonated drink, and strawberry jam samples. It provided a new insight on the purification of carbon dots and detection of amaranth by dual-mode nanoprobe.
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高影响因子
Separation Science Plus
·
2022
·Vol. 5
·期 9
·513-519
·
IF 0
Yanni Huang,Jia Chen,Gafang Fu,Chi Zhang,Hongdeng Qiu
This work reported the preparation and evaluation of a 2D porous graphene as the stationary phase for gas chromatography with high-resolution performance from non-polar to polar structural isomers. As a result, the dynamically coated porous graphene capillary column has a film thickness of about 16 μm. After aging treatment at different temperatures, the porous graphene capillary column exhibited high thermal stability up to 300°C. In addition, the porous graphene capillary column has good column repeatability and reproducibility. The retention time RSDs are 2.61–3.90% ( n = 3) during the days and 4.58–4.78% ( n = 3) column-to-column. This work demonstrates the advantageous separation performance of a good potential for the porous graphene as a new stationary phase for gas chromatography analysis.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2022
·
IF 3.119
Kangling Yin,Li Chen,Feng Liu,Taotao Fan,Yuehang Wu,Shuai Li,Zongcheng Yan
Focused on developing a biocompatible and eco-friendly extraction platform, aqueous two-phase systems (ATPS) containing betaine-xylitol deep eutectic solvent (DES), three small-molecular alcohols (1-propanol, 2-propanol, and tert-butanol), and water were investigated here. The effect of alcohol properties on the efficiency to form ATPS with aqueous solution of DES was studied at 298.15 K and atmospheric pressure. The results suggested that the formation of the ATPS was attributed to the incompatibility between the DES and alcohol in aqueous medium, allowing the increase in the biphasic region using tert-butanol with the highest hydrophobicity among three alcohols. Combined with Karl Fischer titration, the high-performance liquid chromatography (HPLC) analysis was used to evaluate the tie-lines of the ATPS, and it was found that DES components were enriched in the lower phase while alcohol was transferred preferentially to the upper phase. Additionally, the increase in the concentrations of ATPS phase compositions was responsible for the increase in the length of tie-lines, which led to a higher driven force for phase separation. The detailed experimental data were highly correlated by the NRTL model based on a low root-mean-square deviation (≤1.79%). Moreover, five biomolecules (gallic acid, syringic acid, quercetin, kaempferol, and isorhamnetin) were used as probes to determine the extraction ability of the studied DES/alcohol ATPS. This work may lay a promising foundation for the diversity development of the ATPS.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2022
·
IF 6.449
Heng Zhang,Feng Cheng,Yan Li,Chao He,Hu Li,Song Yang
Efficiently selective catalytic conversion of biomass into biofuels and high-value chemicals using robust and porous catalysts is of great significance for valorization of renewable carbon resources. With respect to this, to reduce the supply dependence on natural oils, heterogeneous catalysis provides the opportunity for versatile anethole (AN) synthesis from bio-derived 4′-methoxypropiophenone (4-MOPP) via the one-pot cascade reactions of catalytic transfer hydrogenation (CTH) followed by dehydration, using an alcohol hydrogen donor and a Lewis/Brønsted acid catalyst. Herein, a sustainable and green strategy for catalytic upgrading of 4-MOPP to AN was developed via the cascade CTH-dehydration process, which was remarkably promoted by polymeric organophosphate unconventional MOFs-hafnium nanohybrids (PDVP-Hf) prepared via a simple solvothermal method. Interestingly, Brønsted/Lewis acidity, Lewis basicity, and hydrophobicity of PDVP-Hf could be effectively regulated by simply adjusting the composite components, among which PDVP-Hf-3 having an amorphous and porous inorganic-organic framework structure (with mesopores centered at 6.52 nm), an enhanced acidity of a suitable B/L molar ratio with lower basicity, and a strong hydrophobicity (water contact angle of 113°), was demonstrated to be efficient for selective conversion of 4-MOPP to AN with a maximum yield of 98.9% using 2-pentanol as hydrogen donor. Moreover, this developed catalytic system exhibited broad substrate generality, and could be employed for reductive upgrading of various carbonyl compounds to alcohols, or further coupled with dehydration to afford olefins. The catalyst synergistic roles of L acid-base couple sites (Hf 4+ -O 2− ) and B acid species (-OH) contributed to its pronounced performance, while high thermostability and robust hydrophobicity of PDVP-Hf-3 endowed its superior reusability, with no significant decline in reactivity for five consecutive recycles. The involved catalytic mechanisms and reaction pathways were explicitly elucidated by control experiments and theoretical calculations. This work sheds light on the appropriate design of unconventional MOF-polymer nanohybrids by combining both advantages for enhanced biomass upgrading via tough cascade reactions.
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高影响因子
GREEN CHEMISTRY
·
2022
·Vol. 24
·期 17
·6619-6630
·
IF 11.034
Haichuan Zhang,Shiyu Fu
Catalytic transfer hydrogenolysis (CTH) has emerged as a sustainable and carbon-neutral biorefinery process due to the decrease in the carbon footprint and high atom and energy efficiency. Herein, heteropoly acids (HPAs) as green catalysts were used for the CTH of Kraft lignin (KL) into lignin oil under mild conditions. It is found that all the types of HPAs, Pd/C, H-donor solvent and reaction temperature affected significantly the conversion of Kraft lignin. SiW12 and PW12, respectively, afforded 95.0% and 83.8% KL conversion in isopropanol with Pd/C at 190 °C for 5 h. However, the degradation of eucalyptus Kraft lignin (EKL) provided phenolic monomers with the highest yield of 42.6% using SiW12 and Pd/C. Molecular dynamics (MD) simulation showed that SiW12 and PW12 in isopropanol are more likely to be close to lignin compared to n-propanol. The relative average molecular weight of the obtained lignin oil ranges from 100 Da to 700 Da, including phenolic monomers, dimers and trimers. The lignin monomer products are mainly composed of guaiacols and syringols with 0 to 3 carbon side chains. The simultaneous depolymerization and deoxygenation of KL during CTH led to a high-boiling organic fraction, analyzed with a Fourier transform-ion cyclotron resonance mass spectrometer (FT-ICR MS) equipped with an electrospray negative ion source (ESI−), maintaining highly aromatic structures and having lower O/C and higher H/C ratios compared to initial lignin. This work exhibits a prospective application of the CTH for the conversion of technical lignin to chemicals and biofuels.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jiaping Chen,Guiliang Li,Haibo Lin,Fu Liu
Covalent triazine frameworks (CTFs) are drawing substantial interest as porous crystalline two-dimensional (2D) or three-dimensional (3D) nanomaterials. Fabrication of CTFs nanoribbon is challenging but appealing to separation and photocatalysis. Here we for the first time report the synthesis of crystalline CTF-1 nanoribbons (CTF-1-NR) comprising 2–3 covalent triazine framework units in width through a polar solvent-induced fragmentation strategy. The width of 1D nanoribbons can be facilely tuned by varying the solvent (e.g. ethanol) volume in trifluoromethanesulfonic acid layer after trimerization of aromatic nitriles. The CTF-1-NR are intercalated with Graphene oxide (GO) membranes to extend 1 H NMR transverse relaxation time (T 2 ) and enlarge the confined interspacing (∼8.8 Å), providing ultrafast water transport (∼60 L m -2 h −1 bar −1 ) and high dye molecules rejection (98%). More significantly, the bridging CTF-1-NR enhances charge-carrier separation and gains superior solar-cleaning recoverable permeability (∼7 folds higher than GO). This study provides novel insight into the synthesis of crystalline COF nanoribbons and membrane separation.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Nan Wang,Zhengqi Peng,Hongxia Gao,Teerawat Sema,Jialong Shi,Zhiwu Liang
Effective phase-change solvent system, n-methyl-2-hydroxyethylamine (MAE) + water-insoluble alcohol + H 2 O, was developed for CO 2 capture. First, a preliminary screening of several alcohols was carried out and showed that the MAE/n-butanol/water system had the potential to become an excellent phase change absorbent. Then, through phase change experiment, absorption experiment, desorption experiment, and theoretical energy consumption analysis, the MAE:n-butanol:water ratio of 3:4:3 possessed the most impressive CO 2 capture performance. Theoretical calculation of CO 2 desorption energy consumption showed that in comparison with 30 wt% monoethanolamine (MEA), 50% of reboiler heat duty can be reduced in case of the 3:4:3 system. In addition, equilibrium phase diagram of the three components showed that concentration of n-butanol significantly affected the phase separation. The two-phase species distribution after phase separation was determined using Nuclear magnetic resonance spectroscopy (NMR). This work also shows that temperature has influence on absorption and desorption performance. Finally, the absorbent stability test during absorption–desorption process confirmed that MAE/n-butanol/water absorbent had a great potential for capturing CO 2 .
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高影响因子
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