SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Jie Zheng,Anruo Luo,Yan Jin,Baicheng Feng,Jianhua Chen,Xingrong Zhang
In this study, 5-nonyl salicylaldoxime (5-NSA) was synthesized and used as a malachite collector. Its flotation performances and adsorption mechanism were systematically investigated by micro-flotation experiments, contact angle measurements, SEM-EDS, FT-IR, XPS and DFTB+ simulations. The micro-flotation test results showed that 5-NSA produced high recovery of malachite at pH 9.0–10.0, while showing lower collecting power to calcite or quartz. The contact angle analysis results indicated that the hydrophobicity of malachite surface was promoted after the adsorption of 5-NSA. SEM confirmed the adsorption of 5-NSA on malachite surface. FT-IR and XPS analysis results confirmed that O and N atoms in the oxime group were immobilized on malachite surface with Cu through O Cu O and N Cu O bonding. Their adsorption performances on malachite surface were simulated by DFTB+ method, including 5-NSA, tert -butylsalicylaldehyde oxime (TBSA) and salicylaldoxime agents, which analyzed the bond lengths of their covalent bond formation with Cu and speculated their adsorption properties. In general, according to the experimental test and simulation results, 5-NSA showed a stronger power to malachite than TBSA and salicylaldoxime, and only a small dosage can produce a high malachite recovery. The findings of this research will be helpful to improve the comprehensive utilization efficiency of malachite and promote the metallurgy of copper oxide ores.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 22
·26905-26916
·
IF 2.478
Yao Tiantian,Zou Hao,Zhang Jin,Zhou Yi
Constructing a heterojunction to extend the survival time of photogenerated carriers is an effective way to increase the photocatalytic performance of materials. The 2D-2D flower-like DUT-5@Bi 2 WO 6 composite material is obtained via the hydrothermal method for the frist time. The efficiency of Rhodamine B removal based on 30% DUT-5@Bi 2 WO 6 is 87% under visible light for 18 min, which is 4.55 times that of pure Bi 2 WO 6 . RhB-sensitized effect plays a decisive role in enhancing the photocatalytic activity of DUT-5 to RhB under visible light. The results shows that the type I heterojunction is formed between RhB/DUT-5 and Bi 2 WO 6 . The wide contact surface stems from heterojunction can accelerate the separation and transfer of photo-generated charges. Furthermore, the high specific surface area and unique pore structure of DUT-5 provide sufficient active sites for photocatalytic reactions. Thus, the efficient charge transfer and sufficient active sites contribute to the photocatalytic activity. This work provides a new idea for the development of 2D-2D composite materials to degrade organic pollutants under visible light to solve environmental pollution.
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高影响因子
Marine Drugs
·
2026
·Vol. 24
·期 11
·378
·
IF 5.7
A-Long Zhang,Yan-Qing Guo,Zheng-Biao Zou,Xian-Wen Yang,Chun-Lan Xie
Chemical investigation of the deep-sea-derived fungusPenicillium maliMCCC 3A00140 afforded two new compounds, penimeroandranoid E (1) and malistatin (2), together with 16 known ones (3–18). Their structures were established by extensive spectroscopic analyses, including 1D and 2D NMR and HRESIMS. The relative configuration of1was supported by single-crystal X-ray diffraction, and its absolute configuration was assigned by comparison of the experimental and calculated electronic circular dichroism (ECD) spectra. Compound1was the meroterpenoid reported to possess a 6/6/6/5 spirocyclic framework—a spiro-fused variant of the 6/6/6/5 carbocyclic system that was characteristic of andrastin-type DMOA-derived meroterpenoids—and its structure and relative configuration were established by single-crystal X-ray diffraction. The stereochemical assignment of2was based on NOESY correlations and biosynthetic analogy with related statins. Screening of all isolates at 20 μM in a receptor activator of nuclear factor-κB ligand (RANKL)-induced osteoclastogenesis model using primary murine bone marrow-derived macrophages identified1as the bioactive secondary metabolite. Compound1reduced the formation of tartrate-resistant acid phosphatase-positive multinucleated osteoclasts at 12.5–50 μM without decreasing cell viability after 48 h at concentrations up to 50 μM. These findings expand the chemical diversity of fungal meroterpenoids and identify1as a structurally distinctive anti-osteoclastogenic metabolite warranting further mechanistic investigation.
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高影响因子
RSC Advances
·
2014
·Vol. 4
·期 41
·21479-21491
·
IF 3.708
Quanyi Wang,Shutao Xu,Jingrun Chen,Yingxu Wei,Jinzhe Li,Dong Fan,Zhengxi Yu,Yue Qi,Yanli He,Shuliang Xu,Cuiyu Yuan,You Zhou,Jinbang Wang,Mozhi Zhang,Baolian Su,Zhongmin Liu
In this work, two kinds of mesoporous ZSM-5 were synthesized successfully using a hydrothermal methodology by utilizing different soft templates, namely, dimethyl octadecyl [3-(trimethoxysilyl)propyl]ammonium chloride ([(CH3O)3SiC3H6N(CH3)2C18H37]Cl, TPOAC) and hexadecyl trimethyl ammonium bromide (C16H33(CH3)3NBr, CTAB). The obtained mesoporous ZSM-5 samples were compared with conventional ZSM-5, and the effects of different surfactant usages during the synthesis of mesoporous ZSM-5 on the physicochemical and catalytic properties were systematically investigated. Multiple techniques, such as XRD, SEM, N2 adsorption techniques, HP 129Xe NMR, 27Al MAS NMR, 29Si MAS NMR, and 1H MAS NMR, were employed for the characterization. Although the synthesized mesoporous ZSM-5 samples had equal surface areas, they presented different relative crystallinities, morphologies, pore-size distributions, micropore–mesopore interconnectivity, framework atom coordination states and acidities. When using these synthesized ZSM-5 samples as catalysts for methanol conversion, the mesoporous ZSM-5 templated with TPOAC exhibited an extremely long catalyst lifespan compared to conventional ZSM-5, while mesoporous ZSM-5 templated with CTAB showed no advantage in prolonging the catalyst lifetime during the reaction. The differences in the catalytic lifespan and the reduction of coke deposition were correlated to the variation of acidity and porosity with the mesopore generation in the ZSM-5 catalysts by the usage of different structure-directing agents. Compared to the mesopore structure-directing agent, CTAB, with the use of TPOAC as the template and part of the Si source, mesoporous ZSM-5 could be synthesized with good mesopore–micropore interconnectivity, which accounted for the improved catalytic performance in the reaction of methanol conversion.
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高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2019
·Vol. 35
·期 3
·403-409
·
IF 1.071
Zhou Jie,Wu Shaojie,Zhang Wenhui,Liu Qing,Yang Bin,Ren Yinghui,Ma Haixia,Zhao Fengqi,Hu Rongzu
Three energetic ion salts of 3,6-bis[(1 H -1,2,3,4-tetrazol-5-yl)-amino]-1,2,4,5-tetrazine(BTATz), namely, methylamine salt(compound 1 ), ethylenediamine salt(compound 2 ), and diethylamine salt(compound 3 ), were synthesized and characterized by elemental analysis, Fourier transform infrared spectrometry, 1 H NMR spectroscopy, and 13 C NMR spectroscopy. The crystal structure of compound 1 was determined by single-crystal X-ray crystallography, and structural analysis revealed that it belonged to the monoclinic system with P 2 1 /c space group. In addition, the thermal behavior of the three compounds was studied by differential scanning calorimetry and thermogravimetry techniques. The thermal decomposition peak temperatures of the compounds were 574.89, 545.60, and 606.72 K, indicating that the three ion salts exhibited good thermal stability. The kinetic mechanism equations of the main decomposition process and the entropy of activation(Δ S ≠ ), enthalpy of activation(Δ H ≠ ), and Gibbs free energy of activation(Δ G ≠ ) of the three compounds were also obtained. Moreover, the thermal safety of the compounds was evaluated by the values of the self-accelerated decomposition temperature( T SADT ), thermal ignition temperature( T TIT ), and critical temperature of thermal explosion( T b ). The results showed that all the compounds demonstrated good thermal safety, and the thermal safety of compound 3 was better than that of the others.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Jinshan Shen,Hao Chen,Kequan Chen,Yong Qin,Xiuyang Lu,Pingkai Ouyang,Jie Fu
A Pt–Ni/AC bimetallic catalyst was prepared by atomic layer deposition of Pt nanoparticles on the surface of Ni/AC for base-free oxidation of 5-hydroxymethylfurfural (5-HMF) to 2,5-furandicarboxylic acid (2,5-FDCA). A comparison of the Pt–Ni bimetallic catalyst with Ni and the Pt monometallic catalyst was demonstrated by X-ray diffraction (XRD), transmission electron microscopy (TEM), and temperature-programmed desorption of CO (CO-TPD). Compared with the Ni/AC and Pt/AC (1.6 wt % Pt) catalysts, the bimetallic Pt–Ni/AC catalyst had a higher activity for the oxidation of 5-HMF to 2,5-FDCA, with only a 0.4 wt % Pt loading. A 97.5% yield of 2,5-FDCA with 100% 5-HMF conversion was obtained after 15 h at 100 °C. A mass-based activity value of 35.8 h–1 was obtained over the Pt–Ni/AC-15ALD catalyst. The combination of Pt with Ni increased the ability of Pt for C═O adsorption and oxidation, thus increasing the activity of the Pt catalyst. Finally, the catalyst showed good reusability for at least four times without any reduction in the catalytic activity.
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高影响因子
FOOD CHEMISTRY
·
2018
·
IF 4.946
Meng Dong,Lei Qin,Jia Xue,Ming Du,Song-Yi Lin,Xian-Bing Xu,Bei-Wei Zhu
Evaluation of free amino acids (FAAs) and nucleotides in various food matrices has been a widely studied topic in recent years. Here, a fast and efficient strategy for the simultaneous analysis of 20 FAAs and six 5′-nucleotides, using stable isotope labeling-liquid chromatography coupled with tandem mass spectrometry (SIL-LC-MS/MS) is proposed. The method was validated with respect to selectivity, linearity, limits of detection (LOD) and quantification (LOQ), recovery, precision, and stability. LOQs of most FFAs were lower than 1 ng/mL, and 5′-nucleotides were in the range of 5–20 ng/mL. FAAs and 5′-nucleotides in ten shiitake mushrooms from different cultivate areas were further analyzed. Results showed that the contents of cytidine 5′-monophosphate, adenosine 5′-monophosphate, lysine, threonine, arginine were significantly different. Principal component analysis showed clear discrimination of origins, seasons and species. Thus, the proposed method is suitable for the fast discrimination of species and geographical origins of shiitake mushrooms.
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高影响因子
JOURNAL OF COORDINATION CHEMISTRY
·
2018
·
IF 1.703
Zi-Mei Ding,Wen-Li Cao,Xiao-Jing Hang,Xiao Ma,Hui Zheng,Kang-Zhen Xu,Jie Huang
The green nitrogen-rich coordination compound Cd(SCZ)2(AFT)2 (1) (AFT =4-amino-3-(5-tetrazolate)-furazan and SCZ = semicarbazide) was first synthesized and characterized by EA and Fourier Transform Infrared (FT-IR). The single crystal was cultivated and determined with X-ray diffraction. It revealed that 1 crystallizes in the monoclinic space group P21/c. A Cd2+ ion is coordinated by four N atoms and two O atoms to form a distorted octahedral structure. Among them, two nitrogen atoms are from the two AFT ions and the other four atoms are from two SCZ molecules. The thermal decomposition behavior of 1 was studied with DSC and TG-DTG methods. The apparent activation energy (E), thermal stability, and safety parameters (T
SADT, T
TIT, and T
b) were calculated for 1. Moreover, entropy of activation (ΔS
≠), enthalpy of activation (ΔH
≠), free energy of activation (ΔG
≠), specific heat capacity (C
p), and impact sensitivity were also discussed in detail.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Jin Wang,Lin Zhou,Jiali Bei,Mengyuan Xie,Xiting Zhu,Tingting Chen,Xiaomei Wang,Yukou Du,Yong Yao
In this work, the ultrasensitive photoelectrochemical (PEC) sensor for the detection of bovine hemoglobin (BHb) was developed based on water-soluble pillar[5]arenes (WP5) functionalized gold nanoparticles (Au NPs) and bismuth oxybromide (BiOBr) nanoflowers (Au@WP5/BiOBr). The photoelectrical signal of dopamine (DA) was decreased after adding the different concentrations of BHb due to the formation of hydrogen bond between the COOH groups of BHb molecules and the NH 2 group of DA, which could achieve the indirect detection of BHb. Benefiting from the photo-generated electron-holes of BiOBr nanoflowers, the localized surface plasmon resonance (LSPR) effect of Au NPs, the host–guest interaction of WP5 between and DA, the PEC sensor showed a specifically recognize toward BHb with a wide detection range of 1.0 × 10 −11 –1.0 × 10 −1 mg/mL and a detection limit of 4.2 × 10 −12 mg/mL (S/N = 3). Additionally, the proposed PEC sensor also displayed good stability, remarkable selectivity and provided a promising strategy of design pillar[5]arenes functionalized photoelectric activity nanomaterials for PEC sensing application.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Jiaru Ma,Qian Xiong,Fei Tian,Hengyu Wu,Fengqi Xie,Yanfen Chen,Qinglin Tang,Yuqin Zou,Xinyan Huang,Yousheng Liu,Guangguo Ying
Benzotriazoles (BTRs), widely used as tire additives, pose a significant challenge as persistent aquatic pollutants due to their recalcitrance to conventional biological degradation. This study elucidated methanol (ME)-enhanced co-metabolic degradation of 1H-benzotriazole (BT) and 5-chlorobenzotriazole (CBT) by green microalgae. Among the six microalgal species evaluated, Chlorella pyrenoidosa demonstrated superior removal of BT and CBT under 1 % ME supplementation, achieving efficiencies of 33.50 % and 89.67 %, respectively. ME functioned as an electron donor, which favored the reductive dechlorination of CBT, leading to a 2.85-fold higher removal efficiency compared to BT. Biotransformation was identified as the dominant removal mechanism, with 11 and 10 transformation products (TPs) detected for BT and CBT, respectively. An integrated analysis of TPs and transcriptomic data revealed that ME activates a metabolic enzyme-photosynthetic machinery, enhancing electron transport, energy generation, cytochrome P450 (CYP450) expression, and extracellular polymeric substance (EPS) production, thereby facilitating efficient pollutant removal. The proposed degradation pathways further confirmed the role of ME in facilitating specific biotransformation reactions. These findings provide mechanistic insights and establish a theoretical foundation for the development of ME-microalgae co-metabolism systems as a sustainable technology for remediating persistent pollutants in aquatic ecosystems.
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Chuanli Wang,Chu Sun,Deyang Zhao,Zhiguo Zhu,Kaixuan Yang,Christophe Len,Hongying Lü,Ting Su
A MoS 2 /ZnIn 2 S 4 composite photocatalyst were synthesized via a one-step hydrothermal method for the visible-light-driven oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran (DFF). The reaction was conducted under mild, environmentally friendly conditions, using water as the solvent and without the need for additional oxidizing agents. The flower-like MoS 2 /ZnIn 2 S 4 structure exhibited a high specific surface area, and the formation of a Z -scheme heterojunction between MoS 2 and ZnIn 2 S 4 effectively suppressed the recombination of photogenerated electron-hole pairs, thereby enhancing photocatalytic performance. Density functional theory (DFT) calculations revealed that the 17.5 % MoS 2 /ZnIn 2 S 4 composite possessed lower adsorption energy and a more delocalized electron cloud, creating more favorable conditions for HMF oxidation. Under optimal conditions, the catalyst achieved 70.2 % conversion of HMF with 92.2 % selectivity toward DFF after 3 h of xenon light irradiation. Radical trapping experiments indicated that superoxide radical (•O 2 − ) were the dominant reactive species driving the transformation. This study highlights the potential of one-step hydrothermally synthesized Z -scheme MoS 2 /ZnIn 2 S 4 heterojunctions for efficient biomass-derived chemical valorization, offering valuable insights for the sustainable production of DFF and related high-value chemicals.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Hao Zhang,Botao Fan,Rui Li,Qinghu Tang,Futing Xia,Wenhao Fang
The electrocatalytic 5-hydroxymethylfurfural oxidation reaction (HMFOR) has become a clean and fast-response route for synthesizing the sustainable biomonomer. Here, a Mn-doped Ni(OH) 2 catalyst is constructed and enables a 98.9 % yield of 2,5-furandicarboxylic acid and a 99 % Faradic efficiency with a stable durability up to 50 cycles for the alkaline HMFOR. The Mn-Ni(OH) 2 catalyst shows a low onset potential of ca. 1.29 V ( vs. reversible hydrogen electrode, RHE) and achieves a current density of 50 mA cm −2 at only 1.38 V in 1 M KOH, significantly outperforming the vast majority of Ni-based (oxy)hydroxide catalysts reported to date in the literature. The isomorphic substitution of Ni 2+ ions by the coordination unsaturated Mn ions brings about lattice expansions and crystal defects of the nanoflower-shaped Ni(OH) 2 catalyst. The distinctive Mn-doping effect can modulate the electronic structure and also oxygen vacancy formation on Ni(OH) 2 surface. The experimental and theoretical studies systematically unravel that the ingenious catalytic synergism can significantly boost the proton deintercalation feature of Ni(OH) 2 ( i.e. , an improved generation kinetics of the Ni 3+ (OH)O active center) and dramatically promote the adsorption ability of different reactive intermediates on Ni 3+ (OH)O. As a result, HMFOR is greatly enhanced on the as-prepared Mn-Ni(OH) 2 catalyst. The mechanism investigations further evidence that the activation processes of CH 2 OH and HC O groups during HMFOR must require the participations of OH − ions and H 2 O molecules, respectively. This work has clearly tracked the reconstruction process of a Ni electrocatalyst and firstly unlocked the activation behaviors of different functional groups, thus successfully getting deep insights into the real and dynamic catalytic mechanism for the alkaline HMFOR.
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PubMed
高影响因子
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