CHINESE JOURNAL OF CHEMISTRY
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2016
·Vol. 34
·期 12
·1329-1334
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IF 1.872
Keli Zhong,Jie Zhao,Xue Zhou,Shuhua Hou,Yanjiang Bian,Jianrong Li,Lijun Tang
A new (8-hydroxyquinolin-2-yl)methylene picolinohydrazide derivative ( L ) has been successfully synthesized and characterized. The probe L displays high selectivity to Co 2+ in CH 3 CN/HEPES (1:1, Ｖ / Ｖ , 10 mmol·L −1 , pH=7.4) with a fluorescence "ON-OFF" response. The Co 2+ ion recognition event possesses some distinct features including rapid response, high selectivity and sensitivity, good anti-interference ability and being applicable within a wide pH range. Based on job's plot and ESI-MS studies, the 1:1 binding mode was proposed. The binding constant of L and Co 2+ is 1.63×10 8 L·mol −1 and the detection limit is 1.15 µmol·L −1 . Natural water samples experiments revealed that probe L can be potentially applied to the detection of Co 2+ in real environment.
研究领域:
分析化学
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生物无机化学
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分子探针
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环境监测
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荧光传感
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TETRAHEDRON
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2018
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IF 2.377
Yuqing Ma,Yuyang Zhang,Lin Kong,Jiaxiang Yang
Five quinoline derivatives containing different alkyl chains ( QLACn , n = 2, 4, 6, 8, 12) were synthesized to investigate the effect of alkyl chains on their photophysical properties. The fluorescent properties of the QLACn were affected by the alkyl chains, which indicated obvious blue-shifting trend and fluorescence emission are alkyl chains length-dependent by grinding-induced spectral shifts (Δλ MFC ). Longer alkyl-length revealed larger Δλ MFC . Powder X-ray diffraction (PXRD), scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) measurements indicated that the transformation between microcrystalline and amorphous states upon external stimuli should be responsible for the observed reversible MFC behavior.
研究领域:
材料科学
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光物理学
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APPLIED SURFACE SCIENCE
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2023
·
IF 6.7
Lu Fan,Jian Fan,Yumei Li,Peng Sun,Lianke Zhang
The environmentally friendly semiconductor photocatalyst has tremendous potential for resolving wastewater pollution issues. This study describes the successful fabrication of a novel (LaFe 0.5 Cu 0.5 O 3 ) LFC 0.5 /CQDs nanocomposite using a simple cryogenic-calcination method. The LFC 0.5 /G-CQDs composite displayed the greatest light absorption range and photogenerated carrier separation ability based on their various optical characteristics and electron transfer capabilities. Moreover, its quinoline degradation kinetics were 14 times greater than those of pure LFC 0.5 . According to the findings of a thorough investigation, this excellent photocatalytic performance may be ascribed to the synergistic effects of the up-converted fluorescent properties of G-CQDs, tuned band structure, and effective charge separation caused by the formation of heterojunction. Based on the findings of the experimental quenching, it was clear that the LFC 0.5 /G-CQDs photocatalytic process was dominated by the radicals ∙OH and ∙O 2 − . A potential Z-scheme heterojunction mechanism for quinoline degradation by LFC 0.5 /G-CQDs was elucidated using band structure analysis and EPR data. In addition, the composite photocatalyst LFC 0.5 /G-CQDs demonstrated excellent reusability over five cycles. In addition to developing highly efficient visible-light-driven photocatalysts for degrading Quinoline, this study suggests that implementing carbon quantum dots at the center of the main catalyst's luminescence will maximize light utilization and enhance photocatalytic performance.
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ANALYTICAL LETTERS
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2023
·
IF 2
Zhengyu Wang,Yufeng Hu,Zhiduo Ding,Hao Zhou,Jianye Zhang,Jingjing Zhan,Minghuo Wu
For the identification of trace-level organic nitrogen compounds (NCs) in gasoline, a method consisting of water-assisted dispersive solid-phase extraction (DSPE) and high-performance liquid chromatography-high resolution mass spectrometry was developed in which mixed-mode cation exchange was used as the adsorbent. To increase the DSPE efficiency, water was dispersed into the gasoline to increase the pronation of NCs and enhance the ionic interaction with the adsorbent. After systematic optimization of DSPE conditions, including the adsorbent mass, sample volume, water to gasoline ratio, sample loading time, washing and elution solvents, sensitive determination of NCs (detection limits from 0.1 to 5 ng/L for the 14 analytes) was achieved by this method with a 100-fold enrichment. A number of unknown NC isomers were observed from the extracted ion chromatograms based on the accurate determination of mass-to-charge ratio (m/z), from which two sets of isomers at theoretical m/z of 122.09643 and 136.11208 were selected for identification. By careful elucidation of the product ion spectra of the selected ions, 16 NCs were putatively identified, in which six non-aniline homologs were reported for the first time.
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JOURNAL OF MOLECULAR STRUCTURE
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2023
·
IF 3.8
Xiaoyun Zhang,Yuxin Su,Yinhang Zhang,Shuo Guan,Xiaoyang Wang,Yanping He
In an effort to develop an effective corrosion inhibitor which is applicable to the chelating acidizing fluids in petroleum production, a novel heterocyclic quaternary ammonium salt dimer (TQD) was synthesized through the reaction of quinoline with 4-chloromethylthiazole hydrochloride. An analogue compound, benzyl quinolinium chloride dimer (BQD), was also prepared for comparison. Their anti-corrosion performances in 15% lactic acid solution were investigated through weight-loss experiments, electrochemical tests, surface morphology observation and simulation calculations. The outcomes demonstrate that inhibition efficiency of 99.38% has been achieved with 0.1% TQD at 363 K, which is much higher than that of BQD at the same condition. Both inhibitors were consistent with the Langmuir model, and both were hybrid adsorption, including physical and chemical adsorptions. According to the results of surface analysis (SEM, AFM, XPS, contact angle) and theoretical calculation (DFT and MD), TQD can effectively slow down the metal corrosion in lactic acid and thus is a promising inhibitor for oil and gas well acidizing purpose. The stronger adsorption capacity of TQD may come out of the contribution of thiazole rings in the molecules.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Jinxin Li,Dan Zhong,Feiyu Li,Kefei Li,Wencheng Ma,Jun Ma,Jingna Zhang,Aoshuang Sun
A bifunctional electro-Fenton (EF) cathode with Fe 3 O 4 -LaFeO 3 /C embedded graphite felt (GF) was synthesized through a hydrothermal process, which was used for in situ electrochemical formation of active oxygen species (ROS) for coal pyrolysis wastewater (CPW) removal. Experimental results illustrated that the mineralization efficiency of dimethylphenol (DMP) was achieved at 90.7 % within 150 min reaction. On the basis of quenching test and free radical detection, the ∙OH and ∙O 2 − were the detectable ROS in the hetero-EF system for DMP removal. Meanwhile, the formed oxygen vacancies (OVs) and the redox of Fe 2+ /Fe 3+ promoted the oxygen adsorption and H 2 O 2 activation. Density functional theory (DFT) calculations further discussed that the Fe 3 O 4 -LaFeO 3 interface possessed more downward spin density of states in the conduction band, resulting in a higher total density of states (DOS) value near the Fermi level. Moreover, the Fe 3 O 4 -LaFeO 3 /C/GF cathode displayed good recyclability with low metal ion dissolution for 5 times (99.5 % DMP removal and 78.6 % TOC removal) and underlying actual CPW application potential (80.2 % of COD removal and 100 % of total phenol (Tph) removal). Overall, this work invented a novel and stable bifunctional cathode for the efficient removal of refractory CPW in the hetero-EF system.
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APPLIED SURFACE SCIENCE
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2023
·
IF 6.7
Yuxuan Ren,Yachao Xu,Jiahui Zhu,Qi Liu,Jing Yu,Peili Liu,Jun Wang,Rumin Li
The current energy shortage is a cause for concern and nuclear energy is an important sustainable energy source that is vital to the energy transition. As an important resource for the nuclear industry, uranium is present in large quantities in seawater . However, the efficient extraction of uranium from seawater remains challenging due to low uranium concentrations and biofouling. In this work, 2D-perylene diimide-polyethyleneimine (PDI-PEI) photocatalyst have been successfully synthesised by cross-linking polyethyleneimine on the surface of perylene diimide, which enhanced the extraction of uranium from seawater. An electric field is formed on the surface of the material by photocatalysis , where the positively charged part attracts the negatively charged uranyl group, facilitating the adsorption of uranium to the material. The electrons generated on the surface reduce the adsorbed U(VI) to the insoluble U(IV) and can achieve over 99% removal of uranium in solution. In addition, the PDI-PEI exhibited high antibacterial activity to the bacteria by producing reactive oxygen species . In summary, PDI-PEI have good photocatalytic activity , antimicrobial properties and hydrophilicity , which enhance the ability of the material to extract uranium from seawater and provide a versatile method to enhance uranium adsorption.
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ACS Omega
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2022
·
IF 4.132
Qingmei Chen,Xiujun Peng,Jingwen Xue,Jinjin Li,Chunfeng Pan
Contamination is a leading cause of corrosion, foaming, and amine-absorption capacity limitation, predominantly foaming. There is currently an urgent need to identify the sources of amine foaming and eliminate them or reduce their impacts. Gas chromatography–mass spectrometry (GC-MS) and a sample pretreatment method were developed to identify and quantify the organic contaminants. Linear hydrocarbons (C12–C22), long-chain carboxylic acids and esters, alcohol ethoxylates, and benzene derivatives were detected, characterized, and quantified in amine solutions. Furthermore, the effects of the contaminant concentrations on foaming behavior were also investigated by adding those contaminants. The results reveal that the main issue of foaming is due to the presence of unsaturated fatty acids and alcohol ethoxylates, even with a small amount of 10 ppm, whereas benzene derivatives like methylpyridine, quinoline, methyl naphthalene, benzyl alcohol, octahydroacridine, and linear hydrocarbons have little effect on amine foaming, even with an amount up to 2000 ppm. Therefore, it is necessary to monitor the existence and content of these surface-active contaminants.
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PubMed
高影响因子
Nanoscale
·
2022
·Vol. 15
·期 3
·1422-1430
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IF 8.307
Haisheng Wei,Zhaohua Gao,Liru Cao,Kairui Li,Xiaorui Yan,Tiantian Liu,Mingyuan Zhu,Fei Huang,Xu Fang,Jian Lin
Chemoselective hydrogenation of quinoline and its derivatives under mild reaction conditions still remains a challenging topic, which requires a suitable interaction between reactants and a catalyst to achieve high performance and stability. Herein, FePO4-supported Rh single atoms, subnano clusters and nanoparticle catalysts were synthesized and evaluated in the chemoselective hydrogenation of quinoline. The results show that the Rh subnano cluster catalyst with a size of ∼1 nm gives a specific reaction rate of 353 molquinoline molRh−1 h−1 and a selectivity of >99% for 1,2,3,4-tetrahydroquinoline under mild conditions of 50 °C and 5 bar H2, presenting better performance compared with the Rh single atoms and nanoparticle counterparts. Moreover, the Rh subnano cluster catalyst exhibits good stability and substrate universality for the hydrogenation of various functionalized quinolines. A series of characterization studies demonstrate that the acidic properties of the FePO4 support favors the adsorption of quinoline while the Rh subnano clusters promote the dissociation of H2 molecules, and then contribute to the enhanced hydrogenation performance. This work provides an important implication to design efficient Rh-based catalysts for chemoselective hydrogenation under mild conditions.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Jinxin Li,Dan Zhong,Zhaoyu Wu,Yiru Chen,Kefei Li,Qinghui Du,Wencheng Ma,Zhaopeng Li,Jingna Zhang,Jun Ma
Double oxygen vacancies (V O ) tuned core–shell La V CuO δ @CeO x (V O -LCO@CeO x ) nanoreactors with direct electron transfer (DET) structure was synthesized as an effective heterogeneous Fenton-like catalyst for the quinoline removal. The DET structure was constructed by electron-rich ≡Cu center of V O -LCO core and electron-capture center of CeO x shell for electrons supplying and consuming. This structure elevated total V O levels of catalyst through the removal of oxygen atoms in CeO 2 from attice to interface sites. Meanwhile, the ≡Ce(III) acted as reactive sites for the adsorption of hydrogen peroxide (H 2 O 2 ) to form surface peroxide species, and then the electron-rich ≡Cu center was further provided electrons to surface peroxide species by DET to produce hydroxyl radical. Moreover, the newly formed surface V O would also be further promote hydroxyl radical production through self-activation of H 2 O 2 . This catalyst displayed excellent catalytic activity and stability. The density functional theory (DFT) results further pointed out that this structure had excellent adsorption energy, and generable electron transfer from V O -LCO to CeO x . This work provided a novel approach for the development of heterogeneous Fenton-like catalysts to degrade quinoline wastewater.
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CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Juan Zhang,Yulong Ma,Yonggang Sun,Lei Wang,Liqiong Wang,Zhen Wang,Bolong Zhao,Jingdan Gao,Min Xu
The application of heterogeneous advanced oxidation processes (AOPs) in the removal of refractory pollutants has been hindered by several drawbacks, such as difficult recovery of the powder catalyst, the low yields and inefficient utilization of reactive oxygen species (ROS). We developed a novel catalytic membrane named 2D CoO@MoS 2 membrane, its catalytic active layer was a composite material formed by MoS 2 nanosheets wrapped and intercalated between 2D CoO porous nanoplates, providing abundant active sites and oxygen vacancies (O v ). 2D CoO@MoS 2 membrane was applied to activate peroxymonosulfate (PMS) for benzotriazole (BTA) degradation. DFT calculations and series characterizations demonstrated that electron transfer occurred at the contact interface between 2D CoO and MoS 2 phase, while the 2D CoO@MoS 2 composite could act as an effective electron donor for PMS. The redox cycles of Mo(IV)/ Mo(VI) and O v /O 2− could synergistically enhance the regeneration of Co(II), thereby maintaining the cycle of catalytic active center, which facilitated the spontaneous dissociation of PMS to generate various ROS, including SO 4 − (30.2 μM), 1 O 2 (8.6 μM) and OH (5.8 μM). These ROS rapidly degraded 99.7% of BTA (20 mg/L) through the nanoconfined layer of hydrophilic membrane with an ultra-high flux of 2172 L m −2 h −1 in a super-fast time (∼195 ms). Surprisingly, the degradation rate constant k exhibited 3 to 5 orders of magnitude higher compared to conventional heterogeneous AOPs. Furthermore, the catalytic stability, degradation pathways and biological toxicity of BTA degradation were also evaluated. This membrane-based AOPs technique provides a new approach to overcome the limitations of conventional heterogeneous catalysis.
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Journal of Environmental Chemical Engineering
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2023
·
IF 7.7
Peiji Yin,Yixuan Chen,Yu Wang,Yujing Chi,Bokai Li,Mingwei Xu,Haiyan Song,Chunxia Chen
Adsorptive removal of nitrogen-containing compounds from fuels still faced the challenge of efficient and low-cost adsorbents exploitation. In this study, a novel material hydroxyl modified nano calcium phosphate was hydrothermally synthesized using Polyethylene glycol-4000 (PEG-4000) as template, and used as an efficient and low-cost adsorbent for quinoline removal from model fuel. The hydroxyl modified nano calcium phosphate obtained an excellent morphology of fine nanoparticles by regulating the Ca/P mol ratio and the PEG-4000 amount during synthesis, and thus obtained the intergranular pores. Meanwhile, a number of hydroxyl groups were introduced into the nano calcium phosphate to obtain more solid acidity. The adsorption efficiency of quinoline over the hydroxyl modified nano calcium phosphate was significantly enhanced, being attributed to the improvements in morphology, structure and solid acidity properties. 0.1 g of an optimal adsorbent achieved 94 % removal of quinoline with 70 ppm of initial N concentration in 20 mL model fuel within 10 min. Mechanism study proposed that the adsorption process occurred on both the outer surface and the inner pores of hydroxyl calcium phosphate, and thus the rich hydroxyl groups and pores significantly increased the Brønsted acid sites for the combination of H + and N in quinoline. The hydroxyl calcium phosphate was easy to be regenerated and exhibited good recyclability for quinoline adsorption. The adsorption thermodynamics and kinetics research essentially presented the feature of the present adsorptive denitrogenation system. The newly developed adsorbent exhibited the advantages of easily modified structure, chemical stability and harmlessness for further industrial applications.
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