Catalysts
·
2017
·Vol. 7
·期 12
·362
·
IF 3.082
Chunjing Hao,Zehua Xiao,Di Xu,Chengbo Zhang,Jian Qiu,Kefu Liu
Textile dyes are some of the most refractory organic compounds in the environment due to their complex and various structure. An integrated resin adsorption/Dielectric Barrier Discharge (DBD) plasma regeneration was proposed to treat the indigo carmine solution. It is the first time to report ectopic regeneration of the saturated resins by non-thermal Dielectric Barrier Discharge. The adsorption/desorption efficiency, surface functional groups, structural properties, regeneration efficiency, and the intermediate products between gas and liquid phase before and after treatment were investigated. The results showed that DBD plasma could maintain the efficient adsorption performance of resins while degrading the indigo carmine adsorbed by resins. The degradation rate of indigo carmine reached 88% and the regeneration efficiency (RE) can be maintained above 85% after multi-successive regeneration cycles. The indigo carmine contaminants were decomposed by a variety of reactive radicals leading to fracture of exocyclic C=C bond, which could cause decoloration of dye solution. Based on above results, a possible degradation pathway for the indigo carmine by resin adsorption/DBD plasma treatment was proposed.Keywords:indigo carmine;resin;Dielectric Barrier Discharge;adsorption;regeneration
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2015
·
IF 2.723
Yichen Hu,Xiao Chen,Zhiqiang Liu,Gejiao Wang,Shuijiao Liao
Indigo carmine (IC) is one of the oldest, most important, and highly toxic dyes which is released from the effluents of many industries and results in serious pollution in water. In this study, the biogenic Mn oxides were activated by NaOH and then heated for 3 h at 350 °C to produce activated carbon doped with Mn oxide (Bio-MnO x -C), which were produced by culturing Mn (II)-oxidizing bacterial strain MnI7-9 in liquid A medium at 28 °C with 10 mmol/L MnCl 2 . Bio-MnO x -C was characterized by SEM, TEM , IR , XPS , XRD , etc . It contained C, O, and Mn which comprised Mn (IV) and Mn (III) valence states at a ratio of 3.81:1. It had poorly crystalline ε-MnO 2 with a specific surface area of 130.94 m 2 /g. A total of 0.1 g Bio-MnO x -C could remove 45.95 g IC from 500 mg/L IC solution after 0.5 h contact time. IC removal by Bio-MnO x -C included a rapid oxidation reaction and the removal reaction followed second-order kinetic equation . These results confirmed that Bio-MnO x -C could be a potential material for wastewater remediation.
研究领域:
环境科学
·
微生物学
✓ 已验证
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 11
·1-11
·
IF 5.3
Yang Jingqi,Wang Xinru,Yu Ying,Cao Yujuan,Guo Manli,Hu Xiaogang,Wang Li,Lin Bixia
By combining boric acid-modified carbon dots ( p -CDs) and alizarin red (ARS), a double emission probe p -CDs@ARS with fluorescence at 410 nm and 600 nm is designed for the detection of glyphosate. When Cu 2+ is added, it binds with ARS to cause ARS release from p -CDs@ARS, which decreases the fluorescence at 600 nm. However, in the presence of glyphosate, glyphosate competes to the binding of Cu 2+ , releasing ARS to bind with p -CDs again. Therefore, the fluorescence of 600 nm recovers. Based on this, the fluorescence of 410 nm and 600 nm act as the reference and response signal, respectively, achieving the ratiometric fluorescence detection of glyphosate. The linear range of glyphosate detection is 0.5–50 µM with a limit of detection at 0.37 µM which is well below the maximum residue limit for glyphosate in food. When the probe is used to detect the glyphosate residue in Pearl River water and cucumber, the detection results are well consistent with those detected by HPLC. The established method based on p -CDs@ARS has the advantages that the assembly of ratiometric fluorescence probe is simple, and the detection speed is fast. Additionally, a typical INHIBIT logical system has been successfully constructed based on glyphosate, Cu 2+ , and the fluorescence signal of p -CDs@ARS. Graphical
研究领域:
分析化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Applied Catalysis O: Open
·
2024
·
IF 0
Yongsi Jiao,Cunjun Li,Yanqi Xu,Limei He,Linjiang Wang
Photodegradation of indigo carmine (IC) in wastewater has received much attention in recent decades. However, the current photocatalysts used for IC photodegradation suffer from an unsatisfactory efficiency due to low yield of reactive species. Herein, a P-modified biochar/g-C 3 N 4 (P-BC/CN) photocatalyst was fabricated by mechanochemical method using P-modified biochar and g-C 3 N 4 as precursors. It is discovered that P N bonds were constructed between P-modified biochar and g-C 3 N 4 , and these bonds served as the active sites to promote the generation of •O 2 − during the photodegradation process. The biochar component in P-BC/CN composite is conducive to transfer the photogenerated carriers, thereby avoiding their recombination. The photodegradation experiment showed that the P-BC/CN composite exhibits an impressive photodegradation performance towards IC ( C 0 = 50 mg/L) with a photodegradation rate of 95.3% in 120 min. This work provides a green and efficient method to design biochar-based photocatalyst with P N active sites for advanced wastewater purification.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
DOI
Journal of Chemistry
·
2015
·Vol. 2015
·期 1
·670194
·
IF 0.772
Youxun Liu,Mingyang Yan,Yuanyuan Geng,Juan Huang
Efficient reuse and regeneration of spent mediators are highly desired for many of the laccases’ biotechnology applications. This investigation demonstrates that a redox mediator 2,2′-azino-bis-(3-ethylbenzothiazoline)-6-sulfonic acid (ABTS) covalently attached to silica nanoparticles (SNPs) effectively mediated dye decolorization catalyzed by laccase. Characteristics of ABTS-modified silica nanoparticles (ABTS-SNPs) were researched by scanning electron microscopy and Fourier-transformed infrared spectroscopy. When ABTS and ABTS-SNPs were used as laccase mediators, the decolorization yields of 96 and 95% were, respectively, obtained for indigo carmine dye. The results suggest that ABTS immobilized on SNPs can be used as laccase mediators as they retain almost the same efficiency as the free ABTS. The oxidized ABTS-SNPs were regenerated by their reduction reaction with ascorbic acid. Decolorization efficiency of regenerated ABTS-SNPs and their initial forms were found to be almost equivalent. Six reuse cycles for spent ABTS-SNPs were run for the treatment of indigo carmine, providing decolorization yields of 96–77%. Compared with free mediator, the immobilized mediators have the advantage of being easily recovered, regenerated, and reused making the whole process environmentally friendly.
研究领域:
环境生物技术
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纳米生物技术
·
酶工程
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污染物降解
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绿色化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 12
·127511
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IF 3.721
Jiangyan Cao,Qiuhong Min,Wenjuan Bian,Liuli Yang,Jing Lei,Mingyu Zhang,Hongqing Ma,Jianbei Qiu,Xuhui Xu,Xue Yu
High performance of synthetic colorants detection system has great importance for food safety, yet its quantitative analysis with high sensitivity remains challenging. Herein, core–shell NaGdF4: Yb3+, Er3+@NaYF4 upconversion nanoparticles based solid sensor (UCNPs-SS) is designed and explored in this work, where the detection limit of 0.01 μg mL−1 can be achieved thanks to the effective energy transfer between amaranth and this fluorescence-based sensor. Besides, ratiometric detection technique is employed in this system to ensure the accuracy of the detection, hence, insignificant change of the upconversion luminescence intensity of this UCNPs-SS is observed when the potentially interfering substances are present. Moreover, this UCNPs-SS exhibits good stability for recycled detections. Hence, the precise amaranth detection of three commercial soft drinks and excellent recoveries are achieved via our core–shell UCNPs-SS in this work. These positive results indicate that this proposed fluorescence detect approach not only exhibits excellent sensitivity, but also provides feasibility for practical applications.
研究领域:
分析化学
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食品安全
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纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ANALYTICAL CHEMISTRY
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2018
·Vol. 73
·期 8
·817-823
·
IF 0.971
Hu Q. Q.,Gao H.,Wang Y. M.,Ma W.,Sun D. M.
Abstract The poly(L-arginine)–graphene modified glassy carbon electrode ( GCE ) was fabricated and the electrochemical behavior of carmine and amaranth on this electrode was studied by cyclic voltammetric method. Compared with poly(L-arginine)/GCE and GCE, the poly(L-arginine)–graphene modified GCE improved the sensitivity for the determination of carmine and amaranth. The experimental results indicated that the oxidation peaks of carmine and amaranth were separated at 121 mV in phosphate buffer solution at pH 2.5. The linear range for the simultaneous determination of carmine and amaranth were 7.5 × 10 –7 –7.5 × 10 –5 M. The detection limits were 7 × 10 –8 M for carmine and 2.5 × 10 –7 M for amaranth. The method has been applied to the simultaneous determination of carmine and amaranth in drinks with satisfactory results.
研究领域:
分析化学
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食品科学
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电化学
✓ 已验证
DOI
高影响因子
QUIMICA NOVA
·
2016
·Vol. 39
·期 8
·956-961
·
IF 0.617
Zhang Xiuli,Yin Yidong,Sun Zhibo,Du Yingqiu,Ma Shichao,Wu Yan
Chromium and sulfur co-doped nanometer TiO2 hollow glass microspheres (Cr/S/TiO2-HGM) were synthesized by a sol-gel method. Characterization used X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), N2 adsorption-desorption (Brunauer-Emmett-Teller (BET) measurements) and UV-Vis diffuse reflectance spectroscopy. The photocatalytic activity was evaluated by photodegradation of indigo carmine in an aqueous solution under visible light irradiation. The results indicated that the Cr/S/TiO2 containing 0.60% (atomic ratio) chromium and 1.2% (atomic ratio) sulfur calcined at 500 ºC for 2 h had high catalytic efficiency under visible light irradiation. The floating Cr/S/TiO2-HGM catalyst had greater photocatalytic activity than Cr/S/TiO2 powder. Therefore, Cr/S/TiO2-HGM is a promising, high-performing, visible-light-driven, and more reusable photocatalyst.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2022
·Vol. 15
·期 19
·6648
·
IF 3.748
Jingfei Luan,Bowen Niu,Bingbing Ma,Guangmin Yang,Wenlu Liu
In2YSbO7and In2YSbO7/BiSnSbO6heterojunction photocatalyst were prepared by a solvothermal method for the first time. The structural characteristics of In2YSbO7had been represented. The outcomes showed that In2YSbO7crystallized well and possessed pyrochlore constitution, a stable cubic crystal system and space groupFd3m. The lattice parameter of In2YSbO7was discovered to be a = 11.102698 Å and the band gap energy of In2YSbO7was discovered to be 2.68 eV, separately. After visible-light irradiation of 120 minutes (VLGI-120M), the removal rate (ROR) of indigo carmine (IC) reached 99.42% with In2YSbO7/BiSnSbO6heterojunction (IBH) as a photocatalyst. The ROR of total organic carbon (TOC) reached 93.10% with IBH as a photocatalyst after VLGI-120M. Additionally, the dynamics constant k which was taken from the dynamic curve toward (DCT) IC density and VLGI time with IBH as a catalyst reached 0.02950 min−1. The dynamics constant k which came from the DCT TOC density and VLGI time with IBH as a photocatalyst reached 0.01783 min−1. The photocatalytic degradation of IC in dye wastewater (DW) with IBH as a photocatalyst under VLGI was in accordance with the first-order kinetic curves. IBH was used to degrade IC in DW for three cycles of experiments under VLGI, and the ROR of IC reached 98.74%, 96.89% and 94.88%, respectively, after VLGI-120M, indicating that IBH had high stability. Compared with superoxide anions or holes, hydroxyl radicals possessed the largest oxidative ability for removing IC in DW, as demonstrated by experiments with the addition of trapping agents. Lastly, the probable degradation mechanism and degradation pathway of IC were revealed in detail. The results showed that a visible-light-responsive heterojunction photocatalyst which possessed high catalytic activity and a photocatalytic reaction system which could effectively remove IC in DW were obtained. This work provided a fresh scientific research idea for improving the performance of a single catalyst.Keywords:In2YSbO7;In2YSbO7/BiSnSbO6heterojunction photocatalyst;indigo carmine;photocatalytic degradation;visible-light irradiation;N-doped TiO2
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
IONICS
·
2019
·Vol. 26
·期 1
·449-456
·
IF 2.289
Zheng Li,Zhang Wen,Guo Jun
A modified electrode Ni(II)–ARS/GR/CPE has been fabricated by electrodepositing nickel(II)–alizarin red complex on the surface of graphene-modified carbon paste electrode (GR/CPE) in alkaline solution. The modified electrode is characterized by scanning electron microscopy, Fourier transform infrared spectrometry, x-ray photoelectron spectroscopy, cyclic voltammetry, and electrochemical impedance spectroscopy. It exhibits the characteristic of improved reversibility and enhanced current responses of the Ni(III)/Ni(II) couple compared with Ni(II)–ARS/CPE. It also shows enhanced electrocatalytic activity toward the oxidation of formamide, which is due to the high surface area and facile charge–transfer ability of graphene and Ni(II)–ARS complex. The mechanisms of film formation and the catalytic process are also discussed. Moreover, the catalytic currents present linear dependence on the concentration of formamide from 0.5 mM to 0.21 M by amperometry; the detection limit is 0.15 mM. The modified electrode for formamide determination is of the property of simple preparation, good stability, fast response, and acceptable sensitivity.
研究领域:
分析化学
·
电化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Fen Liu,Xianwen Kan
In this work, a novel dual-analyte electrochemical sensor was developed based on the combination of boronate affinity and indicator displacement assay (IDA) strategy. Reduced graphene oxidation (RGO) and poly(3-aminophenylboronic acid) (pAPBA) were modified on glassy carbon electrode (GCE), which further bound dopamine (DA) via a reversible covalent interaction between the APBA and DA. Due to the higher affinity of pAPBA to the analytes, the bound DA can be displaced by fructose (Fru) or Alizarin Red S (ARS). As an indicator, the decrease of DA current caused by the displacement was used to monitor the concentration of the analyte. For non electro-active molecule, the decrease of DA current was directly proportional to the logarithm of Fru concentration in a range from 7.0 × 10 −8 to 1.0 × 10 −4 mol/L. For electro-active molecule, the current of DA decreased along with the increase of ARS current owing to the displacement, which were combined as a dual-signl for ARS sensitive detection with a linear range of 9.0 × 10 −8 - 1.0 × 10 −5 mol/L. The results of determining analytes with their interferences demonstrated the good specific affinity of the sensor toward the analytes. The dual-analyte electrochemical sensor based on IDA strategy probably provides a potential guidance for multi-analyte facile, sensitive, and specific detection.
研究领域:
生物化学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Food Analytical Methods
·
2017
·Vol. 10
·期 9
·3149-3157
·
IF 2.038
Jing Shasha,Zheng Huijun,Zhao Li,Qu Lingbo,Yu Lanlan
A new sensitive electrochemical sensor based on poly(sodium 4-styrenesulfonate) (PSS) functionalized graphene and Co 3 O 4 nanoparticle clusters (PSS-GN/Co 3 O 4 ) ternary composite was fabricated via two-step synthesis. The PSS-GN/Co 3 O 4 nanocomposite significantly increased the oxidative activity of amaranth due to the individual merit and mutual effect of PSS-GN and Co 3 O 4 nanoparticle clusters which improved the performance of the electrochemical sensor with high sensitivity. Cyclic voltammetry (CV) and linear sweep voltammetry (LSV) measurements were used for the detection of amaranth. Under the optimal conditions, the oxidation peak currents of amaranth increased proportionally to the concentration within the range of 0.01–1.0 and 1.0–6.0 μmol L −1 , and the limit of detection was 4.0 nmol L −1 . The proposed modified electrode was highly sensitive and was successfully applied to determine amaranth in the soft drinks with satisfactory recoveries. The as-prepared PSS-GN/Co 3 O 4 /GCE electrochemical sensor offers a feasible way for designing simpler, low cost, and environment-friendly sensors based on Co 3 O 4 nanoparticle clusters.
研究领域:
分析化学
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材料科学
·
食品科学
✓ 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）