JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Jiangping Jing,Zhuoyuan Chen,Chang Feng,Mengmeng Sun,Jian Hou
Photoelectrochemical cathodic protection is emerging as a green and environmental method to protect metals against corrosion. Graphitic carbon nitride (g-C 3 N 4 ) shows great application potential in this area because of its high efficiency, high stability and low cost. However, the pristine g-C 3 N 4 shows amphoteric properties, resulting in its failure in providing photoelectrochemical cathodic protection for the coupled metal in NaCl solution. In this work, a K&I co-doping technique was performed to modulate the band structure of g-C 3 N 4 , and an n-type g-C 3 N 4 (n-C 3 N 4 ) was obtained. The changes in the molecular structure were studied by SEM, HRTEM , XRD , EDS, XPS and FT-IR technologies. The n-type semiconductor characteristics were verified by the photoinduced i-V curves, SKP potential distributions and pH drift techniques. The n-C 3 N 4 can generate positive photocurrent in the whole investigated potential range, making it able to provide photoelectrochemical cathodic protection for the coupled 316L stainless steel in NaCl solution. This work is very helpful for promoting the application of g-C 3 N 4 in the fields of the photoelectric conversion and the photoelectrochemical cathodic protection.
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JOURNAL OF HAZARDOUS MATERIALS
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2020
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IF 9.038
Chen Ling,Zixi Ren,Mengmeng Wei,Fei Tong,Yuwei Cheng,Xiaopeng Zhang,Fuqiang Liu
Inorganic complexants, such as ammonia (AA) and pyrophosphate (PP), are often present alongside heavy metal ions in alkaline plating rinsing wastewater. We investigated the removal capacity of Ni(II) from waters containing [Ni-xNH 3 -yP 2 O 7 ] n complexes by chelating and ion-exchange resins in sole and dual-ligand systems. D463 (containing iminodiacetic groups) and PAMD (possessing polyamine groups) exerted superior performance under all conditions. Ni(II) adsorption on D463 decreased with AA and PP by 10.3% and 64.4%, respectively. Conversely, the adsorption on PAMD increased by 57.3% and 75.8%, respectively. PAMD exhibited high selectivity toward anionic [Ni-PP] species over free PP. More Ni(II) was captured by PAMD in the dual-ligand systems than sole systems, while the case for D463 was opposite. As confirmed by species tracking and DFT/XPS analyses, complexes breaking-Ni 2+ capture was the dominant mechanism for D463, while the dual-site (non-charged and protonated amines) interactions with NiP 2 O 7 2– on PAMD promoted its adsorption. The tandem combination D463-PAMD was the optimal mode to remove the most Ni(II). The actual wastewater test demonstrated that >210 BV effluent met the limit of 0.1 mg Ni(II)/L and the eluent contained 15 g Ni(II)/L. This study guides the application of chelating adsorption processes in the advanced treatment of plating rinsing wastewaters.
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TALANTA
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2012
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IF 3.794
Wan-Jun Li,Xiao Zhou,Shan-Shan Tong,Qiong Jia
The present work proposes a study of the synthesis of poly( N -isopropylacrylamide- co - N , N ′-methylene bisacrylamide) monolithic column embedded with γ-alumina nanoparticles and its applications to the extraction of synthetic food dyes in soft drink samples. The monolithic column was synthesized inside fused silica capillaries using thermally initiated free-radical polymerization with N -isopropylacrylamide (NIPAAm) as the monomer , N , N ′-methylene bisacrylamide (MBAAm) as the cross-linker, dimethylsulfoxide (DMSO) and dodecanol as the porogen . γ-Alumina nanoparticles were introduced to prevent the swelling of the organic polymer and enhance the loading capacity. In order to obtain optimum experimental conditions, sample pH, sample flow rate , sample volume, eluent flow rate were investigated. Under the optimum conditions, we obtained acceptable linearities, low limits of detection, and good intra-day/inter-day relative standard deviations. When applied to the determination of four synthetic food dyes (Tartrazine, Sunset Yellow, Allura Red, and Azorubine) in soft drink samples, satisfactory recoveries were obtained in the range of 90.4–109.2%.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 6
·1-11
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IF 5.3
Zhou Wenxiu,Lv Xiaoyuan,Zhang Shengman,Gao Zhenye,Li Bingjie,Wang Xin
A novel in-tube solid-phase microextraction coupled with an ultra-high performance liquid chromatography-mass spectrometry method has been established for simultaneous quantification of three crucial brain biomarkers N -acetylaspartic acid (NAA), N -acetylglutamic acid (NAG), and N -acetylaspartylglutamic acid (NAAG). A polymer monolith with quaternary ammonium as the functional group was designed and exhibited efficient enrichment of target analytes through strong anion exchange interaction. Under the optimized conditions, the proposed method displayed wide linear ranges (0.1–80 nM for NAA and NAG, 0.2–160 nM for NAAG) with good precision (RSDs were lower than 15%) and low limits of detection (0.019–0.052 nM), which is by far the most sensitive approach for NAA, NAG, and NAAG determination. Furthermore, this approach has been applied to measure the target analytes in mouse brain samples, and endogenous NAA, NAG, and NAAG were successfully detected and quantified from only around 5 mg of cerebral cortex, cerebellum, and hippocampus. Compared with existing methods, the newly developed method in the current study provides highest sensitivity and lowest sample consumption for NAA, NAG, and NAAG measurements, which would potentially be utilized in determining and tracking these meaningful brain biomarkers in diseases or treatment processes, benefiting the investigations of pathophysiology and treatment of brain disorders. Graphical abstract
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ACS Sustainable Chemistry & Engineering
·
2026
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IF 7.6
Huabiao Miao,Junlong Wu,Menghan Yang,Yuqi Lu,Chunjiao Xie,Sha Wen,Bo Xu,Zunxi Huang,Chengbo Zhang
Human milk oligosaccharides (HMOs) and chitin oligosaccharides possess unique nutritional and prebiotic properties, driving interest in their sustainable synthesis. The key enzyme for their production is β-N-acetylhexosaminidase. Herein, we characterized Nag1420 (accession: PQ041313), a novel GH3 family enzyme from Cellulosilyticum sp., which exhibits both hydrolytic and transglycosylating activities. Substrate specificity analysis revealed a higher activity toward the natural substrate chitobiose than the synthetic analog p-nitrophenyl N-acetyl-β-d-glucosaminide (pNP-GlcNAc), enabling complete hydrolysis to N-acetylglucosamine. Notably, Nag1420 synthesized Lacto-N-triose II (LNT II) via transglycosylation when β-lactose was present as an acceptor. Crucially, in a cascade reaction with Chitinase, Nag1420 directly converted chitin waste into the high-value LNT II. This study provides insights into the green and low-cost biosynthesis of high-value-added carbohydrates.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
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IF 19
Mingdong Sun,Shibo Xi,Siyu Zhu,Yu Zhou,Changping Li,Biao Meng,Jiao Wei,Xiao Chi,Xiaojiang Yu,Yujie Cao,Yizhong Huang,Xiaoling Liu,Jun Wang
N-doped carbon-supported single-atom metal sites (Me−N−C) have emerged as promising candidates for electrochemical CO 2 reduction reaction (CO 2 RR) under industrial current densities. However, rationalizing their local coordination environment remains challenging. Herein, a feasible strategy is demonstrated for constructing robust Ni─N─C centers by designing a new family of single-crystalline ionic ZIF-8 materials with atomically defined ionic liquid (IL) cations inside the microchannels. The ─COOH tethered ionic ZIF-8 directed the formation of atomically dispersed Ni─N 4 sites with an elongated Ni─N bond of 1.94 Å. The resulting Ni─N─C catalyst effectively catalyzed the electrochemical CO 2 reduction to CO, delivering a partial current density of 679 mA cm −2 with a Faradic efficiency of 97% and achieving a maximum turnover frequency of 106197 h −1 . The extended Ni─N bond enables the slightly reduced valence state of the Ni site, optimizing the affinity toward CO 2 and intermediate, and thus lowering the energy barrier in the rate-determining * CO 2 → * COOH step.
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JOURNAL OF MOLECULAR LIQUIDS
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2021
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IF 6.165
Jing Fan,Liangliang Fan,Shuangshuo Liu,Fenhong Song
Globally, biofuel is considered as the largest renewable energy source to substitute the petrochemical fuel and it is thus received a great amount of attention from both developed countries and developing countries. Among all the biofuels, biodiesel is strongly recommended as a promising alternative fuel for traditional internal combustion engines. Thermal conductivity is an essential transport property of fuel, and is vital in the flow and heat transfer process. Therefore, it is necessary to conduct the research associated with fuel’s thermal conductivity . In this work, four binary fuel mixtures containing biodiesel components methyl caprate and ethyl caprate with n-undecane and n-tridecane were prepared respectively, and the liquid thermal conductivity of which were measured by the transient hot wire method system. The measurement was conducted at the temperature from 292 K to 362 K at atmospheric pressure. The experimental data reported here have an uncertainty of less than 2%. In addition, a correlation about the relationship between the liquid thermal conductivity with temperature and the esters’ concentration in different fuel blends has been correlated.
研究领域:
燃料化学
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热物理性质
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可再生能源
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生物燃料
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传热传质
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EUROPEAN POLYMER JOURNAL
·
2026
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IF 6.8
Benshun Huang,Ting Shen,Zhuoyi He,Xi Yang,Zhen Wang,Limin Ji,Yujun Chen,Jiayi Luo,Jun Ling,Yougen Chen
The current study explores the organocatalytic ring-opening polymerization (ROP) of γ - n -butoxyl- ε -caprolactone (BCL) and its one-pot block copolymerization with a strained bridged ester N -Boc-substituted proline lactone (N Boc PL), using 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) as the catalyst. The TBD-catalyzed ROP of BCL in toluene demonstrates the first-order polymerization kinetics and exhibits living polymer characteristics within moderate monomer conversion. It effectively suppresses inter- and intramolecular transesterification side reactions to the minimum, which are commonly observed in base-promoted ROP of lactone monomers. It provides acceptable control over the molecular weight of poly( γ - n -butoxyl- ε -caprolactone) (PBCL) by simply tuning the initial monomer-to-initiator molar ratio and controlling the monomer conversion. For instance, the polymerization using bifunctional 1,4-butanediol as the initiator can produce narrowly distributed PBCL with M n,SEC up to 34.5 kg mol −1 and M w / M n of less than 1.20. The TBD-catalyzed copolymerization of BCL with N Boc PL is successful to synthesize block copolymers. Notably, the one-pot copolymerization of the two monomers demonstrates a strictly sequential monomer consumption with N Boc PL polymerizing first followed by BCL. This unique copolymerization behavior enables the synthesis of block copolymers via a one-pot procedure, and tri-, penta-, and heptablock copolymers are accordingly synthesized by introducing monomers simultaneously or in multiple steps. The polymer structures are characterized using NMR, FT-IR spectroscopy, MALDI-TOF MS, and SEC. The thermal characteristics and self-assembly behavior of the polymers in aqueous solutions are further evaluated using TGA, DSC, and DLS. Additionally, the cytotoxicity of the Boc-deprotected triblock copolymers towards mouse fibroblasts (3T3 cells) and their hemolytic effects on rat red blood cells are further investigated, with the detailed results presented in subsequent sections.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2026
·
IF 2.4
Dan Li,Shasha Liu,Yuhan Zhuang
Densities and viscosities of ternary mixtures of n-butyl ether + methyl laurate + n-nonane along with their corresponding binary subsystems (n-butyl ether + methyl laurate, n-butyl ether + n-nonane, and methyl laurate + n-nonane) were measured over the entire composition range at T = 293.15–323.15 K and ambient pressure (p = 0.1 MPa). These systems were selected to serve as model mixtures for ternary fuel blends of biodiesel. The excess molar volume (VmE) and viscosity deviation (Δη) of the ternary and binary mixtures were derived from the experimental data. The Redlich–Kister, Cibulka, and Nagata–Tamura equations were used to correlate the ternary VmE and Δη. The Kohler, Jacob–Fitzner, Tsao–Smith, and Toop models were used to calculate the ternary VmE. The results provide fundamental thermodynamic data that are essential for optimizing the formulation and predicting the performance of ether–biodiesel–diesel blends.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
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IF 10.753
Yuxin Liu,Tianye Wang,Ningning Song,Quanying Wang,Yuqing Wu,Ying Zhang,Hongwen Yu
An efficient, simple, and inexpensive N, S-co-doped hydrochar (SNHC) was synthesized from waste straw by a one-pot hydrothermal process without calcination for the removal of Cr(VI). SNHC demonstrated excellent adsorption performance for Cr(VI) and high stability, achieving a high capacity of 171.33 mg/g (293 K, pH 2) and a capacity retention of 82.73 % after five cycles. The adsorption behavior was determined as a multilayer adsorption process based on chemisorption according to the simulation the results of Freundlich adsorption isotherms and pseudo-second-order models. The characterization of SNHC revealed that graphite N and thiophene S formed by the material were the effective active sites, functioning as electron donors to contribute a significant amount of electrons to reduce Cr(VI) to Cr(III). Therefore, next to electrostatic adsorption and complexation, the synergistic reduction of Cr(VI) by graphite N and thiophene S was the main mechanism for Cr(VI) removal. Additionally, density functional theory calculations indicated a low adsorption energy of thiophene S, which increased the attractive interaction between SNHC and Cr(VI) and played the most important role in reducing Cr(VI). The mechanism of the effect of graphite N and thiophene S on Cr(VI) removal not only offered a comprehensive perspective on the role of N, S co-doped mediation in hydrochar but also provided the basic theory for its practical application.
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MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 9
·1-10
·
IF 6.408
Wang Yuexin,Chen Rui,Shen Bo,Li Cai,Chen Junman,Wang Yanshuang,Tian Shen,Li Xuemiao,Luo Nini,Liu Rui,Ding Shijia,Zhu Chuanlong,Xia Qianfeng
A multifunctional catalytic nanomaterial (Co-MOF@AuNP@ABEI) composed of cobalt-doped metal–organic frameworks (Co-MOF), gold nanoparticles (AuNP), and N -(4-aminobutyl)- N -(ethylisoluminol) (ABEI) is reported. Co-MOF@AuNP@ABEI exhibits high synergistic and zero-distance catalytic properties, which are beneficial to the improvement of the detection sensitivity of an electrochemiluminescent (ECL) biosensor. After coupling with the ECL system and 3D magnetic walking nanomachine amplification strategy, the Co-MOF@AuNP@ABEI can achieve an ultrasensitive ECL assay of Burkholderia pseudomallei with the limit of detection (LOD) of 60.3 aM, which is 2 and 4 orders of magnitude lower than individual ECL system without the nanomachine (4.97 fM) and individual walking nanomachine (340 fM), and superior to the pathogenic bacteria analyses in the previous report. Moreover, the LOD of the proposed ECL detection system for the determination of B. pseudomallei in serum sample was as low as 9.0 CFU mL −1 . The relative standard deviations (RSD) of ECL intensity for the detection of five B. pseudomallei -spiked serum samples were 4.02%, 0.84%, 0.84%, 1.55%, and 0.21%, respectively. The recoveries of the ECL biosensor for the detection of B. pseudomallei DNA-spiked serum samples were 93.63 ~ 107.83%. Therefore, this work demonstrated that the developed multifunctional catalytic nanomaterial with synergistic and zero-distance catalytic properties can be used as excellent ECL signal reporter to improve the detection sensitivity of ECL biosensor. Graphical abstract
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Siming Ren,Mingjun Cui,Xinyu Chen,Shixiang Mei,Yujie Qiang
Carbon steel is the most widely used engineering material , and its corrosion is one of the main areas of concern in many industries. The most practical approach to control this problem is to use corrosion inhibitors . Currently, because of their good water solubility, excellent chemical stability, low cost and nontoxic features, carbon dots (CDs), especially heteroatom-doped CDs, have been developed as green corrosion inhibitors, but the corrosion inhibition efficiency and underlying mechanisms of single- or dual-element doping have not yet been accurately compared and analyzed. Inspired by this, eco-friendly nitrogen-doped and nitrogen, sulfur codoped CDs ( N -CDs and N,S-CDs) are prepared via a one-step hydrothermal process, and a comparative study on their inhibition performance for carbon steel corrosion in strong acidic solution is performed. The results show that both N -CDs and N,S-CDs can restrain the corrosion of carbon steel, and their inhibition efficiency increases with increasing concentration and immersion time, reaching approximately 87.9% ( N -CDs) and 96.4% (N,S-CDs) at 200 ppm after 1 h of immersion. Molecular dynamics simulation indicates that the strong interaction ability between N,S-CDs and the Fe substrate leads to higher corrosion inhibition performance than the single N doping case, benefiting from the multi-anchor adsorption of N,S-CDs on carbon steel in a strong acidic solution. Therefore, the facile preparation, eco-friendliness and high corrosion inhibition performance of N,S-CDs will provide a new approach for designing highly efficient carbon dots and broadening the application of carbon dots in the corrosion field.
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