Catalysts
·
2022
·Vol. 12
·期 10
·1250
·
IF 4.501
Lei Zhao,Tingting Yu,Bing Yang,Huilin Guo,Lifen Liu,Jinlong Zhang,Changfei Gao,Tao Yang,Mingyan Wang,Yu Zhang
Unlike many studies on the preparation of Z-scheme heterojunctions by doping precious metals, in this paper we first prepared a core-shell material obtained by C doping in ZnO and then composite with MnO2to form a heterojunction; that is, a low-cost and highly catalytic ternary composite catalyst was prepared by a simple hydrothermal reaction. Meanwhile, a large amount of experimental data have enabled the heterostructure type as well as the mechanism of photocatalytic performance to be fully demonstrated. It is proven that C as an intermediate medium achieves electron transport while making up the deficiency of ZnO, and constitutes an all-solid state Z-scheme heterojunction, which enables the rapid transfer of photogenerated electron pairs and visible light irradiation to the stream to improve the photocatalytic performance of the composite photocatalyst. In terms of examination of degradation performance, this catalyst showed a high photodegradation rate of tetracycline hydrochloride (TC) of 92.6% within 60 min, and the surface ZnO-C/MnO2catalysts also showed good degradation effect on practical petrochemical wastewater in CODcr degradation experiments.Keywords:ZnO-C/MnO2;Z-scheme heterojunction;wastewater purification;mechanism exploring
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
CHEMOSPHERE
·
2019
·
IF 5.108
Meimei Du,Yongqing Zhang,Imtyaz Hussain,Xiaodong Du,Shaobin Huang,William Wen
In this study, the enhanced effect of pyrite (FeS 2 ) on zero-valent iron (Fe 0 ) corrosion for arsenic (As) removal was investigated in a combined-Fe 0 /FeS 2 system. The effects of different Fe 0 /FeS 2 composition, dosage and initial pH were evaluated by batch experiments. Results showed that the best combination ratio of Fe 0 :FeS 2 (w/w) was 1:1 and the optimal dosage of mixture was 2.0 g/L. The combination of Fe 0 and FeS 2 in a system significantly enhanced the reactivity of Fe 0 for effective As removal within a broad pH range (3.0–9.0). The effective As removal in the combined-Fe 0 /FeS 2 system was primarily ascribed to being enhanced corrosion of Fe 0 by addition of FeS 2 . SEM and XRD characterizations strongly verified this point. Specifically, the mechanism study (the releases of Fe 2+ and total Fe ion, variations of pH values as well as XPS characterization) suggested that FeS 2 in the combined-Fe 0 /FeS 2 system could alleviate the passivation of Fe 0 (pH ini 3.0–5.0) and accelerate the dissolution of pristine oxide film that coated on Fe 0 surface (pH ini 6.8–9.0). Besides, FeS 2 in combined-Fe 0 /FeS 2 system could also accelerate the reactions between Fe 0 to O 2 at pH ini 3.0–9.0. These phenomena were well explained by a galvanic couple between Fe 0 and FeS 2 , where FeS 2 was a cathode and Fe 0 was an anode. Consequently, electrons released from Fe 0 that mediated by FeS 2 to oxide film, passivation layer and O 2 were accelerated in combined-Fe 0 /FeS 2 system and thereby enhanced the corrosion of Fe 0 for efficient As removal. Our findings suggest that utilizing FeS 2 to enhance the corrosion of Fe 0 would be a promising technology for remediation of As-contaminated water.
研究领域:
环境科学
·
水处理技术
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Xuelian He,Hang Zhang,Feiyan Xie,Chaochao Tao,Hualan Xu,Shengliang Zhong
High luminescence intensity and long persistent duration is desired for practical application of long persistent materials. But it still remains challenging due to insufficient phosphors to meet the commercial request and a general lack of understanding of luminescence mechanism. In this work, green persistent luminescent phosphor Zn 2 SiO 4 :Mn 2+ ,Pr 3+ was first synthesized by traditional solid-state reaction method with self-made SiO 2 submicrospheres as silicon source. The morphology, crystal structure, photoluminescence and the long afterglow performance have been investigated systematically. Interestingly, the longest persistent luminescence is observed for 0.025 Mn 2+ , 0.001 Pr 3+ co-doped Zn 2 SiO 4 with a persistent time of ∼2640 s at (0.32 mcd/m 2 ), which is 20 times longer than those of Zn 2 SiO 4 host or single Mn 2+ doped Zn 2 SiO 4 phosphors. The possible persistent mechanism has been discussed. The finding will be beneficial for developing persistent phosphors with superior functionalities.
研究领域:
材料科学
·
光学
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DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Fujian Xu,Tao Lin,Jin Luo,Xiandeng Hou
The mechanism of selenium in the UV photochemical vapor generation (PVG) process was investigated by the use of multiple analytical methods. It was found that the UV-induced photooxidation trapping of the generated volatile SeH2 should be responsible for the previous opinion of relative inertness of Se(VI) in PVG with formic acid. Furthermore, the formation of Se(IV) was found during the PVG process, and the comproportionation of Se(IV) with SeH2 and the photooxidation of Se(IV) into Se(VI) were investigated. Then, a preliminary model was proposed for the PVG process of Se(VI) and Se(IV) with low-molecular-weight organic acids. Then, a novel, simple, and green photocontrolled method without any photocatalyst was thus proposed for the nonchromatographic speciation analysis of Se(IV) and Se(VI), with a limit of detection of 0.2 and 5 ng/mL, respectively.
研究领域:
分析化学
·
环境科学
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Jie Wang,Chaowu Wang,Qibo Zhang
Recycling secondary resources that are rich in valuable metals can help reduce dependence on primary metal ores, foster sustainable industrial development, and enhance the resilience of the metal resource supply chain. This study presents a facile solvent extraction strategy for the efficient recovery of cobalt and nickel from spent choline chloride-ethylene glycol (ChCl-EG, Ethaline) deep eutectic solvent (DES) using bis(2,4,4-trimethylpentyl) phosphonic acid (Cyanex272) as the extractant. By integrating a water-modification approach with pH regulation, the viscosity of the Ethaline system is significantly reduced, while the coordination structures of Co(II) and Ni(II) ions are altered from [CoCl 4 ] 2 ⁻ and [Ni(EG) 3 ] 2+ to [CoCl 2 (H 2 O) 2 (EG) 2 ] 0 and [NiCl(H 2 O) 2 (EG) 2 ] + . This dual modification enables selective extraction with recovery efficiencies exceeding 99 % for both metals, achieving a separation coefficient ( β Co²⁺/Ni²⁺ ) of 9550. Mechanistic insights from density functional theory (DFT) calculations reveal that the preferential extraction of Co(II) stems from its more negative Gibbs free energy change (ΔG Co(II) = -0.21 kJ/mol vs. ΔG Ni(II) = -0.04 kJ/mol) during complexation with saponified Cyanex272. Furthermore, the regenerated Ethaline and Cyanex272 exhibit exceptional stability, maintaining > 95 % extraction efficiency over 10 cycles. This work advances solvent extraction technology by demonstrating a synergistic water-pH strategy for DES-based systems, offering a facile and scalable pathway for recycling metal-laden DES-based electrolytes in industrial applications.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 1
·273
·
IF 4.2
Jinsheng Li,Xueli Hou,Jinlong Xiao,Li Zhu,Yujie Deng,Ziyi Li,Zijian Zhao,Zhenghong Luo,Hao Wei
The isoquinoline alkaloid berberine, derived from Coptidis rhizoma, exhibits antibacterial, hypoglycemic, and anti-inflammatory properties. Canagliflozin is a sodium–glucose cotransporter 2 (SGLT2) inhibitor. We synthesized compounds B9OC and B9OBU by conjugating canagliflozin and n-butane at the C9 position of berberine, aiming to develop antimicrobial agents for combating bacterial infections worldwide. We utilized clinically prevalent pathogenic bacteria, namelyStaphylococcus aureus,Escherichia coli, andPseudomonas aeruginosa, to investigate the antibacterial efficacy of B9OC. This was accomplished through the determination of the MIC80values, analysis of bacterial growth curves, evaluation of biofilm formation using crystal violet staining, assessment of impact on bacterial proteins via SDS-PAGE analysis, and observation of alterations in bacterial morphology utilizing field emission scanning electron microscopy. Meanwhile, the ADMET of compound B9OC was predicted using a computer-aided method. The findings revealed that B9OC exhibited lower minimal inhibitory concentrations against all three bacteria compared to berberine alone or in combination with canagliflozin. The minimal inhibitory concentrations (MICs) of B9OC against the three experimental strains were determined to be 0.035, 0.258, and 0.331 mM. However, B9OBu exhibited a lower level of antimicrobial activity compared to berberine. The compound B9OC exhibits a broad spectrum of antibacterial activity by disrupting the integrity of bacterial cell walls, leading to cellular rupture and the subsequent degradation of intracellular proteins.
研究领域:
药理学
·
微生物学
·
药物化学
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产品关联
DOI
PubMed
高影响因子
RARE METALS
·
2020
·Vol. 40
·期 7
·1987-1994
·
IF 2.161
Wang Ya-Ting,Liu Men,Tang Nian,Li Sheng-Jian,Sun Yan,Wang Shi-Xiong,Yang Xiang-Jun
Abstract Solvent extraction based on ionic liquids is generally considered to be an environmentally benign and effective technology for gold(I) recovery. The aim of this work is to study gold(I) extraction from aurocyanide solution using fluorine-free ionic liquids [A336][SCN], [A336][MTBA] and [A336][Mal]. Various factors that affect gold(I) extraction (including concentration of ionic liquids, equilibrium pH, concentration of the modifier tributyl phosphate (TBP), reaction time and initial concentration of gold in an aqueous solution) were studied and optimized. The results indicate that the three Aliquat 336-based ionic liquids all exhibit excellent behaviors for gold(I) extraction. More than 99.8% of gold(I) can be extracted from the aqueous phase into the ionic liquid phase. The gold-loaded ionic liquids were characterized using infrared spectroscopy and mass spectrometry to study the extraction mechanism of gold(I). The results revealed that extraction of gold(I) into the ionic liquid phase was based on an exchange reaction between the anion Au(CN)
− 2
in aqueous solution and the anion SCN − in ionic liquid [A336][SCN]. The logarithmic relationship between distribution coefficient and TBP concentration indicates that two TBP molecules are involved in the formation of the extracted complex. The extracted complex was determined to be A336 + ·Au(CN)
− 2
·2TBP. In addition, the gold(I)-loaded ionic liquids can be efficiently stripped using NH 4 SCN, 2-methylthiobenzoic acid and methyl maltol. The results establish that Aliquat 336-based ionic liquids have potential application prospects in gold(I) recovery from cyanide solutions.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Xue Song,Hongkui Zhang,Jie Zhang,Runchao Sun,Jihong Zhao,Hailiang Zhao,Junkai Hu,Yongde Liu
In this study, a porous carbonaceous adsorbent was prepared from sycamore flocs by pyrolysis method and K2CO3 activation. The effects of preparative conditions of the material on its adsorptive property were explored. The optimal material (SFB2-900) was obtained with a K2CO3/biochar mass ratio of 2:1 at an activation temperature of 900 °C, possessing a huge surface specific area (1651.27 m2/g). The largest adsorption capacity for ciprofloxacin on SFB2-900 was up to 430.25 mg/g. The adsorption behavior was well described by the pseudo-second-order kinetic model and the Langmuir isothermal model. Meanwhile, this process was spontaneous and exothermic. The obtained material showed excellent adsorption performance in the conditions of diverse pH range, ionic strength, and water quality of the solution. The optimum adsorption conditions (pH = 7.01, dosage = 0.6 g/L, and C0 = 52.94 mg/L) determined based on the response surface methodology were in accordance with the practical validation consequences. The good regeneration effect of SFB2-900 manifested that this material had great practical application potential. Combining the experimental results and density functional theory calculation results, the adsorption mechanisms mainly included pore filling, π–π EDA interactions, electrostatic interactions, and H-bonds. The material could be regarded as a novel and high-efficiency adsorbent for antibiotics. Additionally, these findings also provide reference for the reuse of waste biomass in water treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD PROCESSING AND PRESERVATION
·
2022
·Vol. 46
·期 10
·e16896
·
IF 2.609
Dan-Feng Zhang,Zhi-E Zhou,Juan Du,Xiao-Ning Liao,Gao-Ding Xu,Yan-Ping Hong,Jian-Hua Xiong
Lonicera japonica Thunb. leaves were used to biosynthesize silver nanoparticles (AgNPs), while its antibacterial and antifungal properties were investigated. Reaction conditions of AgNPs which characterized were optimized. The maximum absorption wavelength of the AgNPs was located about 400 nm, with a spherical shape and a particle size of 14.87 ± 4.07 nm. Produced AgNPs showed effective antibacterial activities against tested bacterial strains. Minimal inhibitory concentrations and minimum bactericidal concentrations of the AgNPs were 0.25 and 0.5 mg/ml for Escherichia coli ( E. coli ), and 0.5 and 1.0 mg/ml for Staphylococcus aureus , respectively. According to the mechanism study, AgNPs generated morphological changes in E. coli and disrupted membrane integrity. Furthermore, AgNPs which showed effective dose-dependent inhibitory effects against Penicillium citrinum could suppress the growth of fungal mycelium on citrus peels. Conclusively, AgNPs generated by this facile and green method showed effective antimicrobial activity, which is promising in food processing and preservation. Practical applications Silver nanoparticles have attracted enormous attention because of their intrinsic properties which are advantageous in many applications, especially in agriculture and food industry. Silver nanoparticles were synthesized by medicine food homology plants Lonicera japonica Thunb. leaves for the first time, which was a green synthesis method. Synthesized AgNPs showed good antibacterial and antifungal properties, which has the potential use in citrus preservations.
研究领域:
植物学
·
微生物学
·
食品科学
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2025
·
IF 4.7
Junru Li,Hui Wang,Xuefei Wang,Jinmei Ye,Xiaodong Wang,Bingchun Xue
In this study, a bimetallic nickel-doped Zn-MOF (Ni@Zn-MOF) was successfully fabricated by the hydrothermal method for the removal of norfloxacin (NOR) in pharmaceutical wastewater. The structural and surface characteristics of Ni@Zn-MOF were systematically characterized using SEM-EDS, BET, XRD, FT-IR, XPS, and Zeta potential analyses. The experimental results demonstrated that NOR could be effectively removed within a wide pH range from 3 to 11, achieving a maximum removal efficiency of approximately 94% under optimal adsorption conditions. The adsorption behaviors of NOR were in good accordance with the pseudo-second-order kinetic model and the Freundlich isotherm model. The adsorption mechanism study revealed that the good adsorption performance originated from the synergistic effects of multiple interactions, including pore filling, metal coordination, electrostatic attraction, hydrogen bond, and π-π stacking interactions. Notably, the adsorption-saturated Ni@Zn-MOF demonstrated exceptional regeneration capability and stability, maintaining removal efficiencies above 60% for NOR after five consecutive adsorption-desorption cycles. The current study suggests that the engineered Ni@Zn-MOF nanocomposite can be as a promising functional material for sustainable removal of residual antibiotic contaminants in practical wastewater treatment applications.
研究领域:
环境科学
·
材料科学
·
污染治理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Huixin Zhou,Dingxun Ma,Lingwen Dai,Lage Wuri,Yichao Wang,Xiaozhen Liu,Xinqian Shu
Coal gangue (CG) provides an abundant source of siliceous minerals that can be converted into effective silica. This study aimed to gain a deeper understanding of the evolutionary mechanism of quartz (Qtz) and kaolinite (Kln), in the conversion process of thermal–chemical coupled activation to effective silica. The structure transformation of two types of siliceous minerals and thermodynamic calculation were used to develop a phase diagram model for the formation of effective silica, and then provide a scientific basis for the thermodynamic study of solid-phase reactions. We showed that K 2 CO 3 outperformed CaCO 3 in activation efficiency in the thermal–chemical coupled activation process, and Kln had a higher activation efficiency than Qtz. Notably, when the calcination temperature reaches 850 °C, the activation efficiency of the Kln system with added K 2 CO 3 could exceed 50 %. Characterization and analysis of the effective silica properties and structure revealed that low bioactivity effective silica existed in the minerals with (K, Ca) x Si y O z , corresponding to the Q 3 structure; while high bioactivity effective silica existed in the minerals with (K, Ca) x Al w Si y O z , corresponding to the Q 3 (1Al) structure. Finally, we used FactSage thermodynamic calculation software to further predict the phase transformation process of the solid-phase reaction. The simulation results highly matched the experimental data, providing strong support for effective silica synthesis and process optimization. This study provides theoretical basis for understanding the multi-pathway, multi-phase reaction mechanisms of siliceous minerals transforming into effective silica within CG.
研究领域:
材料科学
·
矿物学
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 76
·62160-62166
·
IF 3.84
Xinwei Jiang,Feng Wang,Gen Li,Lin Qi,Peng Liu,Yanfen Ding,Shimin Zhang,Mingshu Yang
As a kind of one-dimensional (1D) nanostructured material, nanorod rutile titanium dioxide (TiO2) with high surface-to-volume ratio shows potential applications in UV-ray shielding, self-cleaning devices, energy conversion and storage. Well dispersed rod-shaped rutile was prepared by hydrolysis of TiCl4 with hydrochloric acid (HCl) solutions and FeCl3 at low temperature. The crystalline form and morphology were characterized by X-ray diffraction (XRD), Raman spectrum and transmission electron microscopy (TEM). The doping of iron was confirmed by X-ray photoelectron spectroscopy (XPS) analysis. A series of experiments were conducted to figure out the effects of reaction conditions on the crystalline form and shape of the powders. The results showed that either change of acids (H2SO4 or HNO3) or varying of cations (NaCl or AlCl3) leaded to a mixed products or pure anatase. A possible mechanism was proposed to explain why the change of minerals or acids would make such a remarkable difference.
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
危险品化学品经营许可证（带存储）