ADVANCED POWDER TECHNOLOGY
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2024
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IF 4.2
Pengpeng Zhang,Guoqi Song,Chao Wang,Zhou Chen,Xiangpeng Gao,Mingyang Li
The conventional methods of separating closely related minerals like chlorite and specularite present challenges. This study delved into the pre-adsorption effect of 8-hydroxyquinoline (8-HQ) in a reverse flotation system using dextrin as a depressant and dodecylamine as a collector through single mineral flotation experiments, contact angle tests, Zeta potential determination, Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS). The aim was to facilitate reverse flotation by pre-introducing 8-HQ to create specific adsorption with Al/Mg elements on the chlorite surface, thereby enhancing chlorite's flotation ability. Single mineral flotation experiments demonstrated that 8-HQ effectively heightened the disparity in floatability between the two minerals. When 15 mg/L of 8-HQ was added at a pH of 8, chlorite recovered 82.15 percent, while specularite only produced 19.2 percent. Results from artificial mixed minerals substantiated the feasibility of single mineral flotation. Further investigation into adsorption mechanisms revealed that 8-HQ forms steric hindrance via chelation and hydrogen bonding, preventing dextrin from adhering to the metal elements on the chlorite surface. The inherent hydrophobicity also promotes the formation of DDA hydrophobic flocs. Conversely, there was no notable adsorption between 8-HQ and specularite. Specularite could be specifically depressed by dextrin, enabling the selective separation of the two minerals. Finally, a model depicting the potential adsorption of 8-HQ on the mineral surface was proposed.
研究领域:
矿物加工工程
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表面化学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Jie Qin,Wenhui Yao,Liang Wu,Young-Rae Cho,Fusheng Pan
The conventional slippery liquid-infused porous surfaces (SLIPSs) provide relatively limited corrosion protection and self-healing performance for AZ31 Mg alloys. To this end, 8-hydroxyquinoline (8-HQ) was incorporated into a zirconium-based metal–organic framework UiO-66 through coordination (8-HQ@UiO-66), which was then dispersed into silicone oil to fabricate nanoparticle-enhanced-SLIPSs (8-HQ@UiO-66-SLIPSs). Especially, the influences of 8-HQ@UiO-66 concentration on the surface morphology, surface hydrophobicity, and corrosion resistance were studied. It was found that the surface hydrophobicity first increased and then decreased with increasing concentration, showing the highest water contact angle of 121.2° at a concentration of 1 mg mL–1 (8-HQ@UiO-66-SLIPS-1). This was attributed to the development of well-constructed hierarchical micro/nanostructures. Moreover, it also exhibited the best anticorrosion property, with the lowest corrosion current density of 1.24 × 10–10 A cm–2 and the highest impedance modulus of 9.88 × 108 Ω cm2 at 0.01 Hz, primarily associated with the synergistic interaction of 8-HQ and UiO-66. Further, the self-healing performance was evaluated using the scanning vibration electrode technique (SVET), verifying the superior self-healing performance of 8-HQ@UiO-66-SLIPS-1. Hence, the nanoparticle-enhanced-SLIPSs exhibit considerable potential in the corrosion protection of Mg alloys, thereby accelerating their extensive applications in industry.
研究领域:
材料科学
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腐蚀与防护
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2012
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IF 3.456
Lulu Fan,Miao Li,Zhen Lv,Min Sun,Chuannan Luo,Fuguang Lu,Huamin Qiu
The adsorption characteristics of hydroquinol from aqueous solutions onto the β-cyclodextrin modified magnetic chitosan nanoparticles (CMCN) had been investigated. The characteristics results of FTIR , SEM and XRD showed that CMCN was successfully prepared. The influences of the pH of the solution and the contact time on the adsorption amounts had been discussed, and the appropriate process conditions for the adsorption of hydroquinol had been obtained. Equilibrium experiments fitted well with the Freundlich isotherm model, and the maximum adsorption capacity of the CMCN at 303 K was determined to be 1.75 mmol/g for hydroquinol at the concentration of 9.0 mmol/L, much higher than some conventional adsorbents. The CMCN was stable and easily recovered. Moreover, the adsorption capacity was about 90% of the initial saturation adsorption capacity after being used four times.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2018
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IF 2.88
Juan Han,Xu Tang,Yun Wang,Renjie Liu,Lei Wang,Liang Ni
A novel fluorescent probe based 8-hydroxyquinoline (8-HQ) has been designed and synthesized. The probe 1 exhibits fast relay recognition performance for Cu 2+ and Cd 2+ via a fluorescence “on−off−on” response signal. The probe 1 itself has a strong emission peak at 471 nm in EtOH/H 2 O (v/v = 1:9) solution with a blue fluorescence. The addition of Cu 2+ immediately results in the quenching of fluorescence and the limit of detection is 2.7 × 10 −8 M. Moreover, the formation of [1-Cu 2+ ] complexes can also serve as a new efficient probe system for the relay recognition of Cd 2+ with the emergence of a new fluorescence signal under the same conditions. The study also found that the probe 1 has high selectivity for target ions in the presence of other competing ions. The probe 1 has been successfully applied to detect and analyze the trace amount of Cu 2+ and Cd 2+ in environmental water samples.
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TETRAHEDRON
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2015
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IF 2.641
Mingming Yu,Jie Xu,Chao Peng,Zhanxian Li,Chunxia Liu,Liuhe Wei
Based on 8-hydroxyquinoline, a 1,8-naphthalimide-derived colorimetric and fluorescent probe was synthesized for naked-eye and fluorescent recognition of F − (from both tetrabutylammonium fluoride and NaF) with high sensitivity and excellent selectivity. The probe can be employed to detect F − quantitatively within certain concentration range, and the detection limit could be as low as 1.8 μM for tetrabutylammonium fluoride and 9 μM for NaF. With this probe, the tests for fluorine contents in tap water, water sample from Eyebrow Lake and several brands of toothpastes were successfully performed.
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2016
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IF 2.822
Shiqiang Cui,Li Li,Yaping Ding,Jiangjiang Zhang
The Co 3 O 4 electro-catalysts with the mesoporous structure were prepared by the sacrificing template method. The chemical composition , structural and morphological characterizations of Co 3 O 4 were examined by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nitrogen adsorption-desorption (BET). The electrochemical properties of the meso-Co 3 O 4 were investigated by differential pulse voltammetry (DPV) and cyclic voltammetry (CV) for the simultaneous detection of hydroquinone (HQ) and catechol (CC) in the phosphate buffer media (PBS). Based on the meso-Co 3 O 4 modifier electrode, a sensitive electrochemical sensor for phenolic compounds was successfully fabricated. Under optimal conditions, the detection limits of HQ and CC were found to be 0.1 and 0.1 μΜ (S/N = 3), respectively. The outstanding catalytic capability of meso-Co 3 O 4 catalysts may be associated with their large surface area provided by mesoporous structure.
研究领域:
分析化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2016
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IF 2.653
Zhanxian Li,Haixia Li,Caixia Shi,Mingming Yu,Liuhe Wei,Zhonghai Ni
A novel rhodamine and 8-hydroxyquinoline-based derivative was synthesized, which is shown to act as a colorimetric chemosensor for Fe 3 + in aqueous solution with high selectivity over various environmentally and biologically relevant metal ions and anions with a distinct color change from colorless to pink in very fast response time (< 1 min). Fe 3 + can be detected quantitatively in the concentration range from 6.7 to 16 μM and the detection limit (LOD) on UV–vis response of the sensor can be as low as 15 nM. The ‘ in situ ’ prepared Fe 3 + complex ( 1 ⋅ Fe ) showed high selectivity toward PPi against many common anions, and sensitivity (the LOD can be as low as 71 nM). In addition, both the chemosensor and the ‘ in situ ’ prepared Fe 3 + complex are reusable for the detection of Fe 3 + and PPi respectively.
研究领域:
分析化学
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环境科学
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生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Lin Shen,Yongteng Qian,Dong-Hwan Kim,Dae Joon Kang
In this study, cobalt phosphide (CoP 2 ) was synthesized onto a Nickel foam (NF) support via phosphorylation under an N 2 atmosphere. The resulting material was then coated with tetrahydroxyquinone (THQ), a conjugated microporous polymer, using a hydrothermal method. The as-synthesized CoP 2 /THQ@NF showed remarkable electrocatalytic performance for the hydrogen evolution reaction and excellent durability in acidic electrolytes. This was attributed to the synergistic effect of the NF support, CoP 2 , and THQ, which led to a modified electronic structure of CoP 2 and a high electron transfer rate of THQ. A low overpotential of 137 mV was required in a 0.5 M H 2 SO 4 solution to achieve a current density of 10 mA cm −2 .
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
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2013
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IF 1.918
Ruifang Wang,Yali Cao,Dianzeng Jia,Lang Liu,Fang Li
In this paper, zinc(II) bis-(8-hydroxyquinoline) dihydrate (ZnQ 2 ·2H 2 O) and zinc(II) bis-(2-methyl-8-hydroxyquinoline) monohydrate (Zn(MQ) 2 ·H 2 O) were successfully prepared by a room-temperature solid-state chemical reaction using zinc acetate (Zn(CH 3 COO) 2 ·2H 2 O), 8-hydroxyquinoline (HQ) and 2-methyl-8-hydroxyquinoline (2-methyl-8-HQ) as the starting materials. The results of X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR) and thermal analysis (TG/DSC) demonstrated that the chemical composition of the products were ZnQ 2 ·2H 2 O and Zn(MQ) 2 ·H 2 O. The scanning electron microscopy (SEM) images and the transmission electron microscopy (TEM) images showed that the products ZnQ 2 ·2H 2 O and Zn(MQ) 2 ·H 2 O had sheet-like morphology with a thickness of about 50 nm. The UV–vis absorption spectra of ZnQ 2 ·2H 2 O and Zn(MQ) 2 ·H 2 O indicated that they existed charge transfer from the metal to the ligand (MLCT bands). The room-temperature photoluminescence (PL) spectra of ZnQ 2 ·2H 2 O revealed that the sample possessed largely blue shift compared with the previous reports. Besides, the two complexes presented a consistent decline situation along with the decline concentration in chloroform solution, which due to solvate effect and structural similarity. The fluorescence quantum yields were measured at 36.58% and 0.07%, and the emission colors were blue-green and light-blue, respectively. The fluorescence quantum yield of ZnQ 2 ·2H 2 O was higher than some reported similar structure. The method was believed to largely facilitate the fabrication and application of organometallic complex nanomaterials.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2014
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IF 2.063
Wenlu Guo,Xiangguo Meng,Yan Liu,Liang Ni,Zhaoyong Hu,Rui Chen,Minjia Meng,Yun Wang,Juan Han,Min Luo
The new 8-hydroxyquinoline (8-HQ) modified magnetic mesoporous carbon (8-HQ-Ni-CMK-3) was prepared and applied for adsorption of multivariate metal ions from aqueous solution. The prepared adsorbent was characterized by Fourier transform infrared, X-ray diffraction, scanning electron microscopy, transmission electron microscope, nitrogen adsorption-desorption isotherm, elemental analysis, and vibrating sample magnetometer. The static adsorption behaviors toward multivariate metal ions on graphite, the modified graphite by 8-HQ, magnetic mesoporous carbon, and 8-HQ-Ni-CMK-3 were compared, which showed that 8-HQ-Ni-CMK-3 had excellent adsorption capacity. The removal of multivariate metal ions using 8-HQ-Ni-CMK-3 by fixed-bed column was further investigated.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2015
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IF 2.719
Xi Li,Jie Li,Yingchun Li,Kai Xia
8-hydroxyquinoline aluminum/nano-TiO 2 composites were prepared via in situ. In order to make a better combination of the two component, Octavinyl-T8-silsesquioxane (8-vinyl POSS) was introduced into the composite system . The structure and properties of the samples were characterized by XRD , SEM, XPS , UV–visible absorption, Fluorescence spectra and Time-resolved emission-decay. These results show both β-phase and γ-phase of Alq 3 exist in the composite products. Meanwhile, the addition of nano-TiO 2 and 8-vinyl POSS does not change the crystalline and structure of as-prepared Alq 3 . Interestingly, however, XPS spectra shows that two new kinds of interaction forces emerge after the addition of 8-vinyl POSS, owing to the formation of Al–O–Si and Si–O–Ti bond, presumably. Besides, the emission intensity of Alq 3 /nano-TiO 2 and Alq 3 /8-vinyl POSS/nano-TiO 2 increases by 22% and 33%, respectively. The addition of TiO 2 and 8-vinly POSS will not affect the position of emission peak, but will increase the transmission efficiency in electron–hole pairs. In the meantime, surprisingly, the modified Alq 3 has a longer lifetime than as-prepared Alq 3 .
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
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2020
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IF 0
Xin Liu,Yinsheng Xu,Qianqian Liu,Wenjun Zhang
Metal–organic frameworks (MOFs) are a platform with multiple luminescent centers resulting from the multifaceted nature of their structure. Herein, via a facile postsynthetic modification method applied to the MOF (1,4-dicarboxybenzene, 2,6-pyridinedicarboxylic acid, and zirconium chloride were used as the linkers and metal precursor), the lanthanide-functionalized hybrid nanomaterial Eu3+/MOF(xHQ) (HQ = 8-hydroxyquinoline) is prepared. Luminescence of the Eu3+/MOF(xHQ) nanomaterial was investigated at the excitation wavelength of 308–365 nm, where there are two kinds of luminescence, that is, the MOF(xHQ) emission and the Eu3+ emission. After studying the luminescence of the MOF(xHQ), the luminescence mechanism, that is, the preferential absorption enhancement (PAE) mechanism, was proposed, to reveal the PAE of the MOF over HQ. Notably, the Eu3+/MOF(xHQ) achieves multicolor emissions by changing the excitation wavelength that shows great potential applications in the field of white light materials and anticounterfeiting. Moreover, the PAE mechanism makes the existing MOF more extensive and opens the strategy to the reasonable design of dimming aspects for this type of MOF materials.
研究领域:
材料科学
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光学
✓ 已验证
DOI
危险品化学品经营许可证（带存储）