CATALYSIS LETTERS
·
2022
·Vol. 153
·期 6
·1797-1806
·
IF 2.936
Wang Yajuan,Liu Wenqiang,Zhang Juan,Shan Qingwen
A novel ionic porous organic polymers catalysts were prepared and characterized by scanning electron microscopy, Brunner − Emmet − Teller measurements, fourier transform infrared spectroscopy and thermogravimetric analysis The characterization results showed that the synthesized catalyst was a porous polymer and had good heat stability. The catalytic performance of the catalyst was evaluated by synthesis of methacrolein from formaldehyde and propionaldehyde. The optimal reaction conditions were: the catalyst amount was 10%(wt%)of propionic aldehyde mass, the reaction temperature was 85 ℃, the reaction time was 1.5 h, the ratio of propionaldehyde and formaldehyde was 1:1.2. Under optimal condition, the conversion rate of propionaldehyde was up to 99.57% and the selectivity of methacrolein was 98.77%. The catalytic activity did not reduced obviously after being reused for 5 times. The reaction kinetics of synthesis of methacrolein was further studied. The results showed that the reaction order was 1.6, the activation energy was 50.28 kJ/mol and the pre-exponential factor was 4.17 × 10 7 (mol/L) −1.456 /s. Graphical Abstract
✓ 已验证
产品关联
DOI
高影响因子
Nano-Micro Letters
·
2022
·Vol. 14
·期 1
·1-12
·
IF 23.655
Jiang Yuxin,Chai Liyuan,Zhang Dehe,Ouyang Fangping,Zhou Xiangyuan,Alhassan Sikpaam I.,Liu Sailin,He Yingjie,Yan Lvji,Wang Haiying,Zhang Wenchao
AbstractSection
Highlights
First report of a lithium-ion battery cathode as a deionization electrode for desalination.
A novel approach to suppress manganese dissolution by exposing the (111) facet is proposed.
Excellent desalination performance by the LiMn 2 O 4 /C cathode. The material achieves an ultrahigh desalination capacity of 117.3 mg g −1 at 1.0 V and a longer cycle life (200 cycles without capacity decay) with minor manganese dissolution during the cycling test in 10 mM aqueous LiCl solution.
AbstractSection
Abstract
Battery materials as emerging capacitive deionization electrodes for desalination have better salt removal capacities than traditional carbon-based materials. LiMn 2 O 4 , a widely used cathode material, is difficult to utilize as a deionization electrode due to its structural instability upon cycling and Mn dissolution in aqueous-based electrolytes. Herein, a facile and low-cost ball-milling routine was proposed to prepare a LiMn 2 O 4 material with highly exposed (111) facets. The prepared electrode exhibited relatively low dissolution of Mn during cycling, which shows its long cycle stability. In the hybrid capacitive deionization system, the LiMn 2 O 4 /C electrode delivered a high desalination capacity of 117.3 mg g −1 without obvious capacity decay at a voltage of 1.0 V with a 20 mM initial salt concentration. In addition, the exposed (111) facets significantly alleviated Mn ion dissolution, which also enhanced the structural steadiness.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2022
·Vol. 128
·期 9
·1-9
·
IF 2.983
Han Zhanwen,Yu Hongquan,Tian Zhuang,Zhang Jinsu,Sun Jiashi,Li Xiangping,Xu Sai,Chen Baojiu
The lanthanide-based white light-emitting diodes excited by irradiation at a wavelength of 980 nm have attracted increasing attention because of their low photon frequency and ease of implementation. Here, we report on warm, white, Y 2 Ti 2 O 7 :Tm/Yb/Er nanotubes prepared by a simple single-needle electrospinning method. The Y 2 Ti 2 O 7 :Tm/Yb/Er nanotubes have an outer diameter of about 180 nm, and a wall thickness of 36 nm. Their color coordinates and chromaticity were controlled to yellow → red → warm white by adjusting the Tm 3+ concentration from 0.5 to 2.0%. The luminescence properties and upconversion mechanism of Y 2 Ti 2 O 7 :Tm/Yb/Er nanotubes were investigated. The warm white Y 2 Ti 2 O 7 :Tm/Yb/Er nanotubes exhibit a strong correlated color temperature to a household incandescent lamp.
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2022
·Vol. 41
·期 10
·3446-3455
·
IF 6.318
Wu Xin-Fei,Li Zi-Jian,Liu Jin-Xiao,Luo Wen,Gaumet Jean-Jacques,Mai Li-Qiang
Owing to adjustable microstructure and stable physiochemical properties, carbon-based materials are regarded as promising materials as anodes for potassium-ion batteries (PIBs). Building amorphous structure and introducing defects are favorable methods to generate active sites and improve the electrochemical performances of carbon-based materials. In this work, we develop a facile carbonization method to prepare sulfur-doped amorphous carbon microspheres with hierarchical structure and modulated defects concentration (S-CM-700) for potassium storage. Benefiting from the special microstructure, S-CM-700 exhibits the optimal performance and obtains high reversible capacity of 199.6 mAh·g −1 at 100 mA·g −1 , excellent rate property and prominent durability (0.0055% capacity decay per cycle during 1800 cycles). Kinetics analysis and electrochemical characterization are carried out to reveal that the potassium storage could be boosted by regulating the defect level, layer spacing and the content of sulfur-doping. The work provides a general synthesis approach to prepare sustainable carbon anodes for advanced PIBs. Graphical abstract
✓ 已验证
DOI
高影响因子
ARCHIVES OF MICROBIOLOGY
·
2022
·Vol. 204
·期 8
·1-10
·
IF 2.667
Ye Lin,Wang Jian-Yu,Liu Xiao-Fang,Guan Qi,Dou Nong-Xiao,Li Jian,Zhang Qian,Gao Yan-Ming,Wang Min,Li Jian-She,Zhou Bo
The application of nematicidal microorganisms and their virulence factors provides more opportunities to control root-knot nematodes. Bacillus altitudinis AMCC 1040, previously isolated from suppressive soils, showed significant nematicidal activity, and in this study, nematicidal substances produced by Bacillus altitudinis AMCC 1040 were investigated. The results of the basic properties of active substances showed that these compounds have good thermal stability and passage, are resistant to acidic environment and sensitive to alkaline conditions. Further analysis showed that it is a volatile component. Using HS-SPME-GC/MS, the volatile compounds produced by Bacillus altitudinis AMCC 1040 were identified and grouped into four major categories: ethers, alcohols, ketone, and organic acids, comprising a total of eight molecules. Six of them possess nematicidal activities, including 2,3-butanedione, acetic acid, 2-isopropoxy ethylamine, 3-methylbutyric acid, 2-methylbutyric acid and octanoic acid. Our results further our understanding of the effects of Bacillus altitudinis and its nematicidal metabolites on the management of Meloidogyne incognita and may help in finding less toxic nematicides to control root knot nematodes.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 8
·1-10
·
IF 6.408
Wang Jiawei,Du Yi,Du Jianxiu
A new fluorescence method was established for sensitive detection of β-galactosidase (β-gal) activity in spiked human serum and screening of inhibitor. Nitrogen-doped carbon quantum dots (N-CQDs) were prepared by solvothermal polymerization of N-methyl-2-pyrrolidinone in an alkaline condition. The colloidal N-CQDs exhibit good water solubility, stability, and emit bright green fluorescence with a maximum emission peak at 528 nm upon excitation at 420 nm. β-gal specifically catalyzes the decomposition of its substrate P-nitrophenyl-β-D-galactopyranoside into 4-nitrophenol, whose absorption spectrum overlaps well with the excitation spectrum of the N-CQDs. As a result, the fluorescence of the N-CQDs is remarkably quenched by 4-nitrophenol via an inner filter effect. The sensing platform presents a linear response range for β-gal activity from 0.05 to 3.0 U·L −1 with a low limit of detection of 0.023 U·L −1 . An acceptable precision is obtained with a relative standard deviation (RSD) of 3.1% for 1.0 U·L −1 β-gal ( n = 11). The method was applied to determine β-gal in spiked human serums with recoveries in the range 96.3–104.7%. The method was employed to evaluate inhibitor screening with D-galactal and chloroquine diphosphate as models. Graphical abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 6
·1-11
·
IF 6.408
Yu Xinran,Lei Xujing,Zhu Yan,Zhao Qiming
Polyamidamine (PAMAM) dendrimer-functionalized hydrothermal nanosized carbonaceous spheres (HNCSs) were prepared and utilized as latexes for agglomerated anion exchange chromatography (AEC) stationary phase. The high-concentration and scalable production of monodisperse HNCSs (73–98 nm) was accomplished via the polyquaternium-7-assisted hydrothermal carbonization of fructose. The novel PAMAM-based quaternizations of HNCSs were designed by the amidation with PAMAM and epoxy-amine addition reaction with glycidol in aqueous solution. The mild functionalization condition leads to well-kept morphology of HNCSs, which forms one even latex layer on the sulfonated surface of polystyrene-divinylbenzene microbeads for the construction of AEC packing. Under isocratic elution, seven common inorganic anions and five organic acids were baseline separated in 9 min on prepared packing with efficiencies of 54,000–79,800 plates m −1 and asymmetry factor (As) of 1.02–1.12. The obtained separation efficiency, peak symmetry, and analysis time were superior to reported or typical commercial counterparts. The quick separation of polarizable anions in 7 min and carbohydrates in 5 min could also be carried out with symmetrical peaks (As: 1.00–1.18) and high efficiencies (49,700–62,100 N/m). Favorable stability and reproducibility were proved by continuous flushing and injection. The constructed packings were further applied to the determination of thiosulfate and sulfate in water reducer, galacturonic acid in Angelica polysaccharide hydrolysate, and fluoride samples in 4 min. Graphical abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
·
2022
·Vol. 29
·期 5
·1479-1487
·
IF 2.523
Ye Tiantian,Liu Hanfang,Wang Fupeng,Xie Huijie,Ran Saisai,Xu Wei,Liu Jia,Li Bin,Lin Haifeng,Chai Yongming,Wang Lei
Here, we demonstrate a simple in situ synthesis of Pd@silicate-1 (S-1), using [Pd(NH 2 CH 2 CH 2 NH 2 ) 2 ]Cl 2 as a metal precursor and steam-assisted crystallization (SAC) method. The ultra-small Pd nanoparticles (NPs) (~ 1 nm) can be successfully in situ encapsulated into the silicate-1 matrix with well dispersion. The obtained Pd@S-1 catalyst possesses high crystallinity, a large specific surface area and pore volume. More importantly, Pd NPs encapsulated into silicate-1 matrix can avoid the aggregation and sintering during catalytic reaction. Meanwhile, micropores of silicate-1 can improve the selectivity of the products in the hydrogenation of biomass furfural. Consequently, Pd@S-1 catalyst shows excellent catalytic activity in the selective hydrogenation of biomass furfural with selectivity of 95.7% and activity of 83.7% in the condition of relatively low temperature (458 K). Therefore, this strategy provides a new idea for the synthesis of molecular sieve supported metal catalysts.
✓ 已验证
产品关联
DOI
高影响因子
Science China-Technological Sciences
·
2022
·Vol. 65
·期 10
·2337-2347
·
IF 3.903
Hou ShengPing,Zhang Da,Xie ZhiPeng,Kang Yao,Tang ZhengGang,Dai YongNian,Lei Yong,Chen Jian,Liang Feng
As the quantity of waste tires increases, more pyrolysis carbon black (CBp), a type of low value-added carbon black, is being produced. However, the application of CBp has been limited. Therefore, it is necessary to identify and expand applications of CBp. This work focuses on the preparation of activated carbon (AC) from CBp using the physicochemical activation of carbon dioxide (CO 2 ) and potassium hydroxide (KOH). Thereafter, AC is applied to the electrode of the electrical double-layer capacitor (EDLC). The AC prepared by CO 2 /KOH activation exhibited a hierarchical pore structure. The specific surface area increased from 415 to 733 m 2 g −1 , and in combination with low ash content of 1.51%, ensured abundant ion diffusion channels and active sites to store charge. The EDLC comprising the AC (AC-2) electrode prepared by excitation of CO 2 (300 sccm) and KOH had a reasonable gravimetric specific capacitance of 192 F g −1 at 0.5 A g −1 , and exhibited a good rate capability of 73% at 50 A g −1 in a three-electrode system. Moreover, the EDLC device comprising the AC-2 electrode delivered excellent cycling stability (capacitance retention of 106% after 10000 cycles at 2 A g −1 in a two-electrode system). Furthermore, a symmetric supercapacitor based on an AC electrode that exhibits a supreme energy density of 4.7 Wh kg −1 and a maximum power density of 6362.6 W kg −1 is demonstrated.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 48
·73353-73364
·
IF 5.19
Chen Jun,Zhu Layun,Cao Sisi,Song Zihui,Yang Xiaohong,Jin Jie,Chen Zhaoming
In the present study, the cyanobacterial char (ACC) prepared from Chaohu cyanobacteria was used as a nanoscale carrier for zero-valent iron (NZVI) to synthesize a highly efficient activation material designated as cyanobacterial char-supported nanoscale zero-valent iron (NZVI@ACC), which was subsequently used for activating peroxymonosulfate (PMS) to degrade the orange II (OII) dye. The XRD and XPS results revealed that NZVI was anchored onto the ACC through coordination bonding, forming a stable structure. The SEM and TEM observations revealed that the NZVI was embedded in the sheet structure of the ACC. The NZVI@ACC had a larger specific surface area (42.249 m 2 /g) and also magnetism, due to which its components could be separated through an externally applied magnetic field. Using this NZVI@ACC/PMS system, the rate of degradation of OII (100 mg/L) reached 98.32% within 14 min. The OII degradation reaction using the NZVI@ACC/PMS system followed first-order kinetics. The activation energy of this degradation reaction was 17.34 kJ/(mol·K). Quenching and EPR experiments revealed that various free radicals (SO 4 · − , ·OH) were produced, with SO 4 · − playing the major role in the reaction. The theoretical calculations revealed that SO 4 · − attacked the 12 (N) of OII, thereby destroying and degrading both azo and hydrogenated azo structures of OII. The presence of halogen ions in the actual dye-containing wastewater samples inhibited the OII degradation by the NZVI@ACC system to different degrees, and the inhibition effect followed the order I − > Br − > Cl − .
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Composites and Hybrid Materials
·
2022
·Vol. 5
·期 2
·1054-1066
·
IF 11.806
Zhang Zheng,Liu Mingxiang,Ibrahim Mohamed M.,Wu Haikun,Wu Yan,Li Yang,Mersal Gaber A. M.,El Azab Islam H.,El-Bahy Salah M.,Huang Mina,Jiang Yunxiao,Liang Gemeng,Xie Peitao,Liu Chunzhao
Epsilon-near-zero (ENZ) materials are promising candidates in the fields of sensing technologies, solar energy harvesting, and electromagnetic absorbers, and most research on ENZ materials is focused at visible, infrared, and terahertz wavelengths. However, the report about ENZ materials at radio frequency is rare. In this work, flexible polystyrene/graphene (PS/GR) metacomposites exhibiting ENZ properties at radio-frequency region were fabricated by solution mixing assisted with non-solvent induced phase separation (NIPS) strategy and the hot press method. The NIPS strategy greatly improved the dispersion and distribution of GR nanosheets in PS matrix, allowing GR nanosheets to disperse in PS solution without delamination within 72 h. The microstructure, crystalline structure, chemical composition, mechanical properties, and electrical and dielectric properties were investigated. When GR content reached 30 wt%, the continuous conductive GR network was formed, and the epsilon-near-zero at around 920 kHz accompanied by the transition of permittivity from positive to negative was observed, ascribing to the resonance of the induced electric dipoles from GR nanosheets’ surfaces. The equivalent circuit analysis showed that the appearance of inductors was significant for the realization of ENZ and negative permittivity. The flexible PS/GR composites with ENZ properties at radio frequency show great potentials in the fields of wearable materials such as invisibility cloak, drug delivery, and soft robotics. Graphical abstract Graphene nanocomposites are designed by solution mixing assisted with non-solvent induced phase separation, and showed epsilon-near-zero properties ( ε ′ ~ 0) and excellent flexible properties.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 47
·71721-71730
·
IF 5.19
Huang Wenjun,Li Sichao,Wang Hongbin,Cui Peng,Xu Haomiao,Cheng Can,Qu Zan,Yan Naiqiang
Oxidation–reduction-absorption based on sulfite is a promising process for simultaneous removal of NO x and SO 2 . However, excessive oxidation of sulfite and competitive absorption between NO x and SO 2 limit its application. A matching strategy between antioxidants and alkaline agents has been proposed to solve these problems and enhance the absorption process. The comparison results of inhibitors showed that hydroquinone exhibited long-term high-efficiency inhibition of S(IV) (SO 3 2- /HSO 3 - ) oxidation. The comparison of alkaline agents showed that the Na 2 SO 3 solution with heterogeneous mixture of MgO and hydroquinone exhibited better absorption performance than that with other combinations. The absorption amounts of NO x in 0.15 mol/L Na 2 SO 3 50 mL solution added 0.1% hydroquinone (HQ) with 0.09 mol/L MgO were 2.24 mmol, which improved 5 times than that without additives. In addition, studies on the influence of pH showed that the pH of MgO mixture could be stabilized at 9–10 for a long time, while the pH of Na 2 CO 3 mixture decreased faster. Further studies suggested that the hydration of MgO resulted in the solution with MgO keeping high pH. This is also the main reason why the combination of MgO and hydroquinone is superior to the combination of Na 2 CO 3 and hydroquinone in desulfurization and denitration performance.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）