JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2016
·
IF 4.179
Jingjing Cheng,Lijuan Shi,Jianjun Lu
Amino ionic liquids modified superparamagnetic mesoporous core/shell nanocomposite (Fe 3 O 4 @ n SiO 2 @ m SiO 2 @DHIM-NH 2 ) was synthesized to remove orange II and amaranth from water. Due to the multiple active sites of the introduced ionic liquids, the adsorbent presents superior adsorption performance and instantaneous adsorption capacity. The maximum adsorption capacities are reached at pH 2 due to the protonation of amino groups, which are 153.06 and 84.40 mg g −1 for orange II and amaranth, respectively. The good stability, rapid adsorption kinetics, large adsorption capacity, and high separation efficiency make Fe 3 O 4 @ n SiO 2 @ m SiO 2 @DHIM-NH 2 an efficient adsorbent for removing anionic contaminant from water.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2024
·
IF 4
Zhaopeng Wang,Hui Lv,Yu Zhang,Yanan Li
Acid orange II (AO2) is a synthetic azo dye commonly used illegally in food production and processing. The development of a fast and effective analytical method is crucial for controlling the unlawful use of AO2 in food, especially in seasoning. Here, an antibody specific for AO2 was generated, with 1.01 ng/mL IC 50 and minimal cross-reactivity with other analogs (<1 %, including sunset yellow , tartrazine , para red, chromotrope FB, Sudan Ⅰ, rhodamine B , 2-naphthol, amaranth , ponceau 4 R and allura red AC). Furthermore, a highly sensitive quantum dot beads-based fluorescence immunochromatography assay (QBs-FICA) was established for AO2 determination. The assay had a working range of 23–287 μg/kg with a 11 μg/kg limit of detection (LOD) in chili powder and hotpot seasoning samples. Using spiked samples, the results of QBs-FICA were found to be consistent with those of liquid chromatography-tandem mass spectrometry. This indicates that QBs-FICA is a reliable, rapid, and portable tool for testing of AO2.
研究领域:
食品安全检测
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分析化学
·
生物技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Xiaojun Guo,Yanan Xu,Fei Zha,Xiaohua Tang,Haifeng Tian
Hematite (α-Fe 2 O 3 ), as one of Fenton reagents, is widely investigated for the treatment of wastewater in the field of advanced oxidation processes (AOPs). Considering the fast charge carrier recombination of hematite (α-Fe 2 O 3 ), we have successfully synthesized a novel and high active heterogeneous Fenton catalyst α-Fe 2 O 3 /Cu 2 O(SO 4 ) for the degradation of organic pollutants. The results show that the as-obtained Cu 2 O(SO 4 )-Fe9 composite exhibits excellent degradation properties of Orange II. 98.9% degradation rate was achieved for 100 mL of 50 mg/L Orange II solution in the condition of 0.3 g/L Cu 2 O(SO 4 )-Fe9 catalyst, 3 mM H 2 O 2 and pH = 3.5. The degradation rate constants of Cu 2 O(SO 4 )-Fe9 in the photo-Fenton-like system are 9.33 and 4.07 times of Cu 2 O(SO 4 ) and α-Fe 2 O 3 , respectively. In addition, the mechanism and pathway for the degradation of Orange II were proposed. The scheme of combining copper-based oxysulfate Cu 2 O(SO 4 ) with hematite (α-Fe 2 O 3 ) could improve the efficiency of charge carrier separation, which will further enhance the catalytic activity and expand its application in water purification.
研究领域:
环境科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 85
·69593-69605
·
IF 3.84
Jing Wang,Chao Liu,Lu Tong,Jiansheng Li,Rui Luo,Junwen Qi,Yang Li,Lianjun Wang
Iron–copper bimetallic nanoparticles supported on hollow mesoporous silica spheres as a composite catalyst (FeCu/HMS) was synthesized via a post-impregnation and sodium borohydride reduction strategy. The catalyst was characterized by X-ray diffraction, X-ray photoelectron spectroscopy, nitrogen physisorption, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy and zeta potential. The results showed that the FeCu/HMS catalyst possessed hollow mesoporous structure with interior cavity transfixed by mesoporous silica shell. The iron–copper nanoparticles highly dispersed in the matrix of hollow mesoporous silica spheres. For comparison, three other catalysts, including solely iron nanoparticles supported on hollow mesoporous silica spheres (Fe/HMS), solely copper nanoparticles supported on hollow mesoporous silica spheres (Cu/HMS) and iron–copper nanoparticles supported on solid-core structured mesoporous silica spheres (FeCu/MS), were prepared by the similar procedure. To demonstrate the heterogeneous Fenton catalytic performance of the as-synthesized FeCu/HMS, orange II was chosen as a model contaminant. The results showed that 90.2% of 50 mg L−1 orange II was removed during 15 min at the reaction conditions of 1 g L−1 catalyst and 13.7 mM H2O2 in neutral pH and room temperature, and raised to 94.3% at 2 h. Kinetic analysis showed that the degradation of orange II follows the pseudo-first order and the apparent rate constant of FeCu/HMS was much higher than those of as comparison catalysts. Additionally, it was found that the addition of copper could make the catalyst less pH dependent and keep the high activity (93.8% orange II removal efficiency) even at alkaline circumstance (pH = 9). The remarkable catalytic performance of FeCu/HMS may be ascribed to the synergetic effect of iron and copper and “cavity effect” of the hollow structure. The stability and recoverability of the catalyst were assessed. The results indicated that the catalyst retained high catalytic activity (78.9% orange II removal efficiency) after 5 consecutive runs. The unique nanostructure and efficient catalytic activity make the catalyst to be a novel and prospective candidate in heterogeneous Fenton chemistry.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 8
·1733
·
IF 3.2
Zhenling Yang,Guofeng Ma,Jun Zhang
Peroxynitrite-based advanced oxidation technology has gradually become a research hotspot for degrading dye wastewater due to its high efficiency and environmentally friendly features. Transition metal elements, which are commonly used as catalysts for the activation of persulfates, suffer from problems such as easy deactivation and leaching of metal ions, which limit their practical application. In this study, Co78Si8B14/g-C3N4composite catalysts were prepared by wet milling and ball milling methods to investigate their degradation of Orange II dyes by assisting the activation of peroxynitrite under visible light, and the effects of the catalyst ratio, light intensity, and the dosage of catalysts on the degradation performance were investigated. It was shown that the optimum ratio of Co78Si8B14to g-C3N4was 1:3, and the reaction rate constants for the degradation of orange dye by Co78Si8B14/g-C3N4+ PMS + VIS were 4.3 and 5.37 times higher than those of single g-C3N4+ PMS and Co78Si8B14+ PMS, respectively. Meanwhile, the composite catalyst also showed good degradation performance for rhodamine B, methyl orange, and methylene blue dyes, and the degradation effect could reach more than 75%. Cyclic stability tests showed that the catalyst maintained a high degradation efficiency of more than 94% over multiple cycles with low ion dissolution concentration. Its high catalytic activity is attributed to the lowest adsorption energy of the composite catalyst to PMS (Eads= −1.97 eV), which facilitates the degradation reaction, while the synergistic effect of g-C3N4and Co78Si8B14promotes the production of ·SO4, ·OH, and ·O2−. This study provides new ideas for the development of stable and efficient catalysts to expand the synergy between PMS-based and other advanced oxidation technologies.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 59
·54623-54635
·
IF 3.289
Jing Wang,Chao Liu,Ijaz Hussain,Cheng Li,Jiansheng Li,Xiuyun Sun,Jinyou Shen,Weiqing Han,Lianjun Wang
A series of iron–copper bimetallic nanoparticles supported on hollow mesoporous silica spheres with different Fe/Cu ratios were prepared using a simple post-impregnation and sodium borohydride reduction strategy. Different Fe/Cu ratios were obtained by addition of various amounts of ferric and copper salts. The catalysts were characterized by XRD, XPS, nitrogen physisorption, SEM and TEM. To explore the difference of catalytic reactivity among the various FeCu/HMS composites, Fenton-like catalytic oxidation of orange II was chosen as the model catalysis reaction. The catalytic results showed that the catalytic activity depended highly upon the Fe/Cu ratio. Particularly, 1/3 (2Fe6Cu/HMS) is the optimum Fe/Cu mass ratio to achieve the best catalytic activity. Based on the results of detection of ˙OH radicals and cyclic voltammograms, the important origin of the synergetic effect in 2Fe6Cu/HMS is considered as the combination of iron and copper species, which can accelerate the interfacial electron transfer in redox cycles of Fe3+/Fe2+ and Cu2+/Cu+ pairs, followed by the increase in the ˙OH radical generation. The 2Fe6Cu/HMS also possesses less pH dependence and maintains its high activity even under alkaline conditions. The optimal parameters in the degradation of 100 mg L−1 orange II are 27.4 mM of H2O2 with 1.0 g L−1 of catalyst, performed at a pH of 7.0 and 30 degree celsius. It is worth noting that 2Fe6Cu/HMS also possesses potential to treat a high concentration of dye pollutants. 77.7% of orange II was removed when conducted at 1000 mg L−1 initial dye concentration. The stability and recoverability of the composite catalyst were assessed it exhibited a good performance after 5 consecutive runs. The as-synthesized composite catalyst proved to be an attractive alternative for dye wastewater treatment applications.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
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2022
·
IF 4.778
Huixin Xiong,Bailin Zhang,Can Cui,Yiqun Xu
The synthesized polyaniline/FeOOH composite characterized by SEM, HRTEM, XRD , FT-IR and BET, was used as adsorbent for Acid Orange II (AOII). The kinetics, isotherm and thermodynamics of AOII adsorption by polyaniline/FeOOH were studied by batch experiments. And effects of pH and coexisting ions on AOII removals were also investigated. Adsorption kinetics and isotherm well fitted pseudo second-order kinetic model and Langmuir isotherm model, respectively. The maximum adsorption capacity of polyaniline/FeOOH for AOII could reach 155.8 mg g −1 . It showed that polyaniline/FeOOH composite could rapidly and efficiently remove AOII from aqueous solutions. In addition, thermodynamic result indicated that the adsorption was a spontaneous endothermic process. Removal ratio of AOII (100 mg/L) increased as pH decreased and could reach 98.6% at pH3. And anions coexisting in the solutions could inhibit the adsorption effect, while the cations have negligible influence. Also, PANI/FeOOH had better applicability to the different types of anionic dyes. The regeneration of polyaniline/FeOOH loading 98.6% of AOII evaluated for three cycles and there was about 70% of AOII loaded on final adsorbent.
研究领域:
环境科学
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材料科学
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物理化学
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水处理技术
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吸附科学
✓ 已验证
DOI
高影响因子
PLASMA SCIENCE & TECHNOLOGY
·
2019
·Vol. 22
·期 3
·034009
·
IF 1.193
Weigang CHEN,Haixia WU,Jiawei FAN,Zhi FANG,Shaohua LIN
In this study, the effect of activated peroxydisulfate (PDS) by dielectric barrier discharge (DBD) plasma and activated carbon (HGAC) on the removal of acid orange II (AOII) was investigated. The effects of applied voltage, PDS dosage, HGAC dosage, initial pH value, and inorganic anions on the removal rate of AOII were discussed. The main free radicals degrading azo dyes during the experiment were also studied. Experimental results show that the removal rate of AOII in DBD/HGAC/PDS synergistic system is much higher than that in the single system. With the applied voltage of 16 kV, HGAC dosage of 1 g l−1, PDS and AOII molar ratio of 200:1, initial pH value of 5.4 and concentration of AOII solution of 20 mg l−1, the removal rate of AOII reached 97.6% in DBD/HGAC/PDS process after 28 min of reaction. Acidic and neutral conditions are beneficial for AOII removal. Sulfate and hydroxyl radicals play an important role in the removal of AOII. Inorganic anions are not conducive to the removal of AOII.
研究领域:
环境科学
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化学工程
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Yingying Sun,Wan Li,Liqing Zhao,Fengyong Li,Yunfei Xie,Weirong Yao,Wenqiu Liu,Zhaosheng Lin
In food safety assessment, surface-enhanced Raman spectroscopy (SERS) is a novel detection method with the advantages of being fast, easy, and of high sensitivity. However, many SERS substrate synthesis methods are complex, and there are only a few studies on the simultaneous detection of multiple substances. In this study, a new, simple, low-cost SERS substrate was synthesised for the first time to simultaneously detect illegal food additives rhodamine B and basic orange II in chilli products. A lightweight, porous, and low-cost material of melamine foam (MF) was employed as the SERS synthesis template. The substrate’s SERS effect on, and sensitivity to, rhodamine B and basic orange II were demonstrated. The molecular vibration and SERS enhancement mechanisms of the two target molecules were analysed by density functional theory (DFT) calculations. The results reveal that this fabricated substrate has great application potential for the supervision and testing industry.
研究领域:
食品安全
·
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2017
·
IF 2.659
Junhui Yi,Jiaxing Song,Huimei Mo,Yupeng Yang
Ag/AgVO 3 nanorods have been obtained for the first time by one step hydrothermal method with the contribution of pyridine. The prepared sample was systematically characterized. Their photocatalytic properties were investigated by degrading acid orange II (AO-II) under visible light. Compared with pure AgVO 3 , Ag/AgVO 3 nanorods showed much higher photocatalytic activity and stability. The enhanced photocatalytic activity was attributed to Ag nanoparticles (NPs) with a strong surface plasmon resonance (SPR). Further studies indicate that the photogenerated holes (h + ) and superoxide radical anions ( O 2 − ) were major active species. Ag/AgVO 3 nanorods has a huge potential application in wastewater treatment.
研究领域:
材料化学
·
环境科学
·
纳米科技
·
光催化
·
废水处理
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Yong Xue,Jing Shao,Guoqi Sui,Yuqin Ma,Hongji Li
In this paper, a novel SERS imprinted composite material was successfully synthesized with the aid of surface enhanced Raman scattering technology and molecular imprinting technology, which could be suitable for specific detection of organic dyes in the river. The UIO-66(NH 2 ) was wrapped with a thin layer of polydopamine (PDA), after loading Ag nanoparticles on rough surface, Ag@UIO-66(NH 2 )/PDA was synthesized and applied as the SERS substrate. In order to promote the ability of selective detection property in the practical sample, the molecularly imprinted polymer (Ag@UIO-66(NH 2 )/PDA-MIPs) was proposed. When the concentrations range changed between 10 −8 mol/L and 10 −10 mol/L, the intensity of characteristic peak at 1596 cm −1 exhibited a linear relationship with OII concentrations increasing. The limit of detection was low than 10 −10 mol/L, the correlation coefficient was 0.9985. The prepared SERS substrate could be available to the practical sample detection, which expanded SERS detection fields.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2023
·
IF 4.5
Qin Hu,Wenqian Sun,Lixia Xiao,Jie Han,Tianzu Guan,Wenyuan Zhou,Xiaojuan Gong,Zhen-quan Yang
This work for the first time presents a visual fluorescence paper sensor for accurate and on-site detection of acid orange II (AO 2 ) in food matrix, where green-emissive carbon nanodots (G-CDs) were exploited. The as-synthesized G-CDs had an average particle size of 3.9 ± 0.7 nm and displayed green emission at 511 nm upon excitation at 450 nm. When there existed AO 2 , the G-CDs fluorescence was effectively suppressed via inner filter effect (IFE) and dynamic interaction. The as-prepared G-CDs probe achieved a 0.01–25.0 μM linear scope and a 36.5 nM limit of detection. Particularly, owing to a distinguishable reduction in G-CDs emission intensity by a smartphone application , a visual probing platform along with a nanopaper-based device were be developed for recognizing AO 2 . The corresponding detection limits were severally 0.61 μM and 1.39 μM. Success was achieved in applying our fluorescence approaches for detecting AO 2 in Yuba, chili powder, sunflower seeds, tomato paste and orange juice samples, attaining desirable results. The present work underlines the potential of smartphone-integrated nanopaper based on CDs as an encouraging candidate for on-site AO 2 recognition in food matrix.
研究领域:
分析化学
·
食品科学
·
纳米技术
·
环境科学
✓ 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）