NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 47
·19819-19827
·
IF 2.7
Xiu-Juan Jiang,Rong-Gui Zhu,Chen-Xi Zhang,Bing Yang,Wen-Xia Yang,Ming-Xuan Jiang
In recent years, carbon dots (CDs), a type of new carbon nanomaterial, have been widely used. In this study, new fluorescent CDs were synthesized via a one-step hydrothermal synthesis using 2,3-dihydroxynaphthalene and sodium citrate as the carbon source. The results showed that the prepared CDs were significantly quenched by Fe3+ in aqueous environments, and a good linear relationship between the fluorescence intensity of the CDs and a low concentration of Fe3+ was observed. The detection limit of Fe3+ was 0.12 μM, the linear range was 0–4.69 μM and the recovery range of the sample detection was 84–111%. The new fluorescent CDs showed high sensitivity to Fe3+ in the presence of various metal ions and anions. These excellent characteristics promise extensive potential applications for our fluorescent CDs in aqueous environmental monitoring.
研究领域:
分析化学
·
环境科学
·
纳米材料
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2022
·Vol. 12
·期 10
·1339
·
IF 2.67
Hui Han,Ying-Ying Wang,Xing-Chao Yu,Yan-Na Ma,Xuenian Chen
Alkali metal (M = Na, K) salts of the [CB11H12]−anion have attracted increasing attention in many fields such as catalysis and all-solid-state batteries. However, tedious and low-yielding synthetic methods have seriously limited their application in these fields. We developed a facile method for the direct synthesis of the unsolvated potassium and sodium salts of the [CB11H12]−anion in 66% and 68% yields, respectively, by reactions of Na[B11H14] with NaH/NaHMDS (sodium bis(trimethylsilyl)amide), CF3SiMe3in THF and K[B11H14] with KH, CF3SiMe3in DME. This method avoids the exchange of cation and significantly simplifies the reaction setup, thus enabling convenient large-scale synthesis. It is believed that this method will support further application of Na[CB11H12] and K[CB11H12] as solid electrolytes for an all-solid-state battery.Keywords:Na[CB11H12];K[CB11H12];Na[B11H14];K[B11H14];one-pot synthesis
研究领域:
材料化学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2024
·
IF 2.5
Yiyin Yang,Lei Zhang,Fansen Meng,Donglin Tang
ZnO is considered to be a good catalyst for the synthesis of polyurethanes (PUs) by alcoholysis of bisureas (BUs). ZnO tends to form Zn(NCO) 2 (NH 3 ) 2 in the presence of urea at high temperature, so does it in the alcoholysis of BUs. Here, attempt is made to understand the role Zn(NCO) 2 (NH 3 ) 2 plays in the alcoholysis of BUs. A loading of Zn(NCO) 2 (NH 3 ) 2 at 5 mol% is found to be sufficient to catalyze the polymerization and the reaction time is greatly cut from 40 h (catalyzed by ZnO) to 26 h, with similar chemical structures and properties. The tensile strength, elongation at break, and toughness for PU–Zn-5 can reach 43.8 MPa, 330%, and 94.0 J cm −3 , respectively. One-pot synthetic strategy is then further introduced to improve the efficiency of the polymerization. Zn(NCO) 2 (NH 3 ) 2 , BU, and PU can be synthesized in one-pot, by adding ZnO, urea, diamine, LiBr, and diol sequentially. The feasibility of this one-pot method is verified, indicated by the similar reaction time, chemical structures, molecular weight, thermal and mechanical properties. This one-pot synthetic strategy offers an efficient way to synthesize PUs directly and simply from urea, diamines, and diols, which is beneficial for improving the molecular diversity of PUs.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2020
·
IF 4.244
Zi-Jian Huang,Guo-Jian Feng,Kai-Peng Lin,Fu-Long Pu,Yan-Ming Tan,Wei-Chien Tu,Ya-Li Han,Xue-Dan Hou,Hong-Mei Zhang,Yi Zhang
The conversion of crop wastes into fermentable sugars and other chemicals mediated by deep eutectic solvents (DESs) has attracted significant attention. In this work, lactic acid, the constituents of DES, was proved to be a harmful inhibitor for cellulase during the conversion of rice straw to fermentable sugars. Nevertheless, the study here also demonstrated that depending on conditions, lactic acidic–choline chloride (LC) can be utilized for pretreatment and saccharification in a one-pot (PSOP) process with high sugar release. The PSOP process performed at 120℃ for 3 h, 15% biomass loading, a 0.30 mol/L LC with a 40 FPU enzymes saccharification system, achieved a total sugar yield of 75.7%. This value is significantly higher than the 49.9% yield achieved in traditional solid-liquid separation (SLS) processes due to the excellent xylose yield (75.7%). This high total sugar yield is attributed to the retention of the xylooligosaccharide, which was directly utilized in the PSOP process. In addition, the techno-economic analysis demonstrates the potential feasibility of a LC based PSOP process in industrial application.
研究领域:
生物技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2023
·Vol. 13
·期 2
·267
·
IF 3.9
Jia Wu,Bao-Di Ma,Yi Xu
A novel and efficient one-pot three-enzyme cascade method for the synthesis of β-alanine from maleic acid was developed. Two recombinantE. colistrains were constructed. TheE. coli(MaiA-AspA) co-expressing maleiccis-trans isomerase (MaiA) and L-aspartase (AspA) catalyzed the biotransformation of maleic acid to L-aspartate via fumaric acid, andE. coli(ADC) expressing L-aspartate-α-decarboxylase (ADC) catalyzed the bioconversion of L-aspartate to β-alanine. After systematic optimization of reaction conditions for each strain, the whole cells of two strains were combined for one-pot synthesis of β-alanine. It was found that the ratio of the two kinds of cells as well as the cell amount play critical roles in the reaction rate and yield of β-alanine. Adding two kinds of cells in one-pot at the beginning of the reaction was better than adding step by step. Under optimal conditions, the concentration of β-alanine reached 751 mM after a 9 h reaction, corresponding to a 93.9% yield and 178 g/L/d space-time yield. The developed new route showed application potential for green and efficient biosynthesis of β-alanine from a cheap substrate by tandem biocatalysts.Keywords:β-alanine;cascade reaction;biotransformation;one-pot
研究领域:
生物化学
·
合成生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2012
·Vol. 12
·期 9
·7280-7283
·
IF 1.563
Yang Renchun,Tang Dingxing,Ma Fengyun,Tao Ting Xian,Ren Yiming,Chen Zhiming,Zhang Cuige,Li Fang
A facile one-pot route for the synthesis of monodisperse Ag nanocrystals with a narrow size distribution is described. Uniform Ag nanoparticles with the size of around 12 nm were obtained by reduction of AgNO3 in the presence of oleylamine and polymer polyvinylpyrrolidone
(PVP) at low temperature. It is found that temperature has a significant effect on the sizes and the size distributions of the nanoparticles. Because irregular Ag nanoparticles are produced easily due to Ostwald ripening or kinetic control at both high temperature and low temperature, respectively,
uniform nanocrystals can be obtained at an appropriate temperature (70 °C).
研究领域:
纳米材料科学
·
化学合成
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 22
·12428-12435
·
IF 3.049
Shifeng Li,Tingting You,Yang Guo,Shuhua Yao,Shuyan Zang,Min Xiao,Zhigang Zhang,Yanming Shen
A one-step carbothermal synthesis and characterization of biochar-supported nanoscale zero-valent iron (nZVI/BC) was performed for the removal of hexavalent chromium (Cr(VI)) from aqueous solution. High dispersions of nanoscale zero-valent iron supported on biochar were successfully synthesized by the pyrolysis of an iron-impregnated biomass (corn stover) as the carbon and iron source under nitrogen atmosphere. The effects of the pyrolytic temperature on the Fe mineralogies formed on the biochar are discussed. In general, the effects of the treatment time, initial solution pH, and nZVI/BC dosage on the Cr(VI) removal are presented. The results showed high crystallinity and purity, and nZVI/BC was obtained at a pyrolytic temperature of 800 °C. The batch experimental results determined that the adsorption capacity of Cr(VI) decreases with the increase in the initial pH value from 4.0 to 10.0. The Cr(VI) adsorption kinetics data effectively followed a pseudo-second-order kinetics with a calculated rate constant of 0.0.3396 g mg−1 min−1. The calculated thermodynamic parameters, such as ΔG°, ΔH°, and ΔS°, were evaluated, and the results indicated that the Cr(VI) reduction on nZVI/BC was a spontaneous and endothermic process. The adsorption mechanism of Cr(VI) was investigated by XRD and XPS analyses and the results demonstrated that Cr(VI) was reduced to Cr(III) and the oxidation of nZVI occurred during the reaction process. These results prove that nZVI/BC synthesized by a one-step carbothermal method can be considered as a potential candidate for the removal of Cr(VI) from aqueous solutions.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CATALYSIS LETTERS
·
2021
·Vol. 151
·期 9
·2638-2646
·
IF 3.186
Li Xiao,Qin Tingting,Li Liusha,Wu Bo,Lin Tiejun,Zhong Liangshu
Abstract A green route for one−pot synthesis of acetals by tandem hydroformylation−acetalization of olefins using supported Rh−based catalysts was developed. Experimental results demonstrated that suitable Rh loading (1 wt%) with appropriate reaction temperature (120 °C) and reaction time (8 h) were favorable for the formation of acetals, and a high acetals selectivity of 94.6% was achieved. More importantly, the selectivity to valuable linear products was enhanced in this tandem catalysis. Based on the catalytic mechanism study, highly dispersed RhO x nanoparticles and abundant acid sites on the supports were responsible for the hydroformylation and acetalization, respectively. Graphical abstract One-pot synthesis of acetals directly from olefins with high selectivity was achieved over heterogeneous bifunctional catalysts via tandem hydroformylation-acetalization.
研究领域:
化学工程
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2019
·Vol. 9
·期 8
·401
·
IF 2.061
Yuxiang Lu,Yazhou Qin,Dongdong Yu,Jianguang Zhou
In this work, we have synthesized hexapods AgCl crystals with mace pods for the first time. Diallyldimethylammonium chloride (DDA)-controlled stepwise evolution of AgCl crystals from octahedron to hexapods with mace pods are achieved by one-pot method. The intermediates have been captured which show the basic process of crystal growth. In this process, octahedra AgCl crystals firstly grow along the <100> direction and then change to grow in the <110> direction. At the same time, the size of AgCl grow from 2 μm to 20 μm. Due to the poor absorption of visible light by AgCl, sodium borohydride(NaBH4) is used to reduce AgCl hexapods with mace pods crystals. By changing the mole ratio(R) of NaBH4to AgCl, the new structure was reduced to obtain a series of Ag@AgCl microstructures. Visible light catalysis effects of the Ag@AgCl microstructures on degradation of methyl orange (MO) were investigated. The Ag@AgCl microstructures with R = 0.02 have a high photocatalytic performance, which completely degrades MO in 40 min.Keywords:hexapod AgCl;one-pot method;Ag@AgCl microstructure;MO degradation
研究领域:
材料科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 2
·784-789
·
IF 3.119
Hongshe Wang,Yichun Wang,Yinfeng Han,Weixing Zhao,Xiaomei Wang
Humic acid is a non toxic, inexpensive, easily available high-molecular weight polymer. A simple and facile one pot three-component synthesis of 5-substituted 1H-tetrazoles from aldehydes, hydroxyamine hydrochloride and sodium azide using humic acid as an efficient catalyst in water is described. The method reported has several advantages such as high to excellent yields, easy work-up, mild reaction conditions, use of water as a green solvent, and a commercially available, nontoxic and reusable catalyst.
研究领域:
有机化学
·
绿色化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Collagen and Leather
·
2024
·Vol. 6
·期 1
·1-11
·
IF 0
Dai Hongjie,Cao Yingnan,Fu Yu,Tang Mi,Feng Xin,Ma Liang,Zhang Yuhao
Fish scales, considered as low-value by-products, contain peptides and hydroxyapatite that can be applied to produce peptide chelated calcium directly. This study developed a sustainable and one-pot fabrication method for the peptide-chelated calcium from fish scale hydrolysates (FSP-Ca). During pepsin hydrolysis, the releases of peptides (FSP), calcium, and phosphate from fish scales occurred simultaneously, and the chelation was also effectively performed. After a 6-h hydrolysis, the yield of FSP was 46.18%, and the dissolution rate of calcium was 49.53%. Under the optimal conditions (pH 7, chelation time of 25 min, and chelation temperature of 48 °C), a high chelation rate of 86.16% was obtained, with a calcium content of 81.8 mg/g. The results of UV absorption, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM) confirmed the successful chelation between FSP and calcium derived from fish scales. The –NH 2 , –COO – , N–H, C=O, C–H, and –OH groups in FSP participated in the formation of FSP-Ca. Graphical Abstract
研究领域:
食品科学
·
生物材料
·
环境科学
✓ 已验证
DOI
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2024
·
IF 5.9
Zhipeng Qie,Xinhan Zhang,Ze Wang,Zhongbao Liu,Hassan Alhassawi,Hengfan Li,Guoqing Chen,Guangbo Zhao
Abundant pore volume and appropriate pore configuration are two crucial characteristics of high-performance carbonaceous adsorbents and catalysts. In this study, influences of pre-treatments (e.g., breaking, sieving and ash removal by acid) and activation conditions (e.g., activation time) on pore parameters (including BET surface area, pore diameter and pore hierarchy degree) of resultant activated carbon were systematically investigated. In addition, the difference between conventional carbonization-activation (i.e., the two-step preparation method) and one-step activation in pore development of activated carbons was revealed. The sample prepared by a 120-minute one-step activation exhibited a BET surface area high to 1038.1 m 2 /g and a pore hierarchy at 50.7 %. Based on the kinetics analysis using TGA reactor, reaction between the activator (i.e., CO 2 ) and carbon matrix was found enhanced in one-step activation, contributing to the generation of mesopores. Remarkably, a new indicator, Effective Activation Rate (EAR) was proposed to accurately describe the activation rate in one-step synthesis after decoupling the release of moisture and volatile compounds. The above conclusions provide guidance for flexibly regulating the pore configurations of activated carbons derived from natural precursors.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）