Sensors and Actuators Reports
·
2022
·
IF 0
Chuyue Tang,Zhuo Zou,Taotao Liang,Chengsong Yuan,Jiechang Gao,Kanglai Tang,Chang Ming Li
Dopamine plays a critical role in some fatal diseases including Parkinson's disease, schizophrenia, Tourette syndrome and HIV infection studies but its detection sensitivity demands further improvement. Aptamer-based biosensor has good selectivity to detect biologically active substances; however, it is very challenging to achieve high sensitivities for practical applications. Here an electrochemical biosensor is constructed by hollow carbon spheres, aptamer and methylene blue (MB) to monitor dopamine released from Parkinson's disease model (SH-SY5Y) cells with a low detection limit, wide detection range, high sensitivity and good selectivity for much better performance than reported aptamer sensors. Investigation discovers that MB intercalation in aptamers can offer two sites to absorb two dopamine through π-π interaction instead of one DA absorption on an aptamer alone, thereby doubling the detection sensitivity. The sensor was further used to monitor dopamine released from SH-SY5Y cells, clearly confirming the effect of 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine on dopamine synthesis in SH-SY5Y cells and demonstrating the great potential of the sensor in real-time detect dopamine released from living cells. This work renders a new avenue to amplify the detection sensitivity by intercalating redox small molecule to increase the aptamer reaction sites while bridging the interfacial electron transfer.
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DOI
Catalysts
·
2018
·Vol. 8
·期 7
·269
·
IF 3.465
Jing Liu,Yi-Gang Ji,Bin Qiao,Fengqi Zhao,Hongxu Gao,Pei Chen,Zhongwei An,Xinbing Chen,Yu Chen
Exploring inexpensive and highly efficient electrocatalyst to decrease the overpotential of oxygen reduction reaction (ORR) is one of the key issues for the commercialization of energy conversion and storage devices. Heteroatom-doped carbon materials have attracted increasing attention as promising electrocatalysts. Herein, we prepared a highly active electrocatalyst, nitrogen, sulfur co-doped carbon nanofibers (N/S-CNF), via in situ chemical oxidative polymerization of methylene blue on the bacterial cellulose nanofibers, followed by carbonization process. It was found that the type of nitrogen/sulfur source, methylene blue and poly(methylene blue), has significantly influence on the catalytic activity of the resultant carbon nanofibers. Benefiting from the porous structure and high surface area (729 m2/g) which favors mass transfer and exposing of active N and S atoms, the N/S-CNF displays high catalytic activity for the ORR in alkaline media with a half-wave potential of about 0.80 V, and better stability and stronger methanol tolerance than that of 20 wt % Pt/C, indicating great potential application in the field of alkaline fuel cell.Keywords:nitrogen sulfur co-doped carbon nanofibers;bacterial cellulose/poly(methylene blue) hybrids;oxygen reduction reaction;electrocatalyst
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高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 11
·1814
·
IF 5.719
Caizhen Liang,Qingshan Shi,Jin Feng,Junwei Yao,Hui Huang,Xiaobao Xie
In this work, an innovative nano-carbon material (N-CM) adsorbent was reported for exploring its adsorption behaviors toward cationic methylene blue (MB) and anionic reactive blue 19 (RB19) pollutants. The proposed N-CM was synthesized by a one-step solvothermal treatment of citric acid and zinc gluconate small precursors. N-CM consists of nanosheets that have an advantageous specific surface area, large sp2/sp3hybridized domains, and abundant nitrogen/oxygen-containing surface functional groups. The synergistic effects of these features are conducive to the MB and RB19 adsorption. Different from anionic RB19 adsorption (79.54 mg/g) by the cooperative π-π stacking and hydrogen bonding, cationic MB adsorbed onto N-CM mainly by the electrostatic attraction at the natural pH solution (> pHpzc), with an adsorption capacity up to 118.98 mg/g. Interestingly, both MB and RB19 adsorption conformed to the pseudo-second order kinetic (R2≥ 0.995) and Langmuir isothermal (R2≥ 0.990) models, accompanied by similar maximum monolayer adsorption capacities of 120.77 and 116.01 mg/g, respectively. Their adsorption processes exhibited spontaneously endothermic characteristics. Moreover, N-CM showed superior selective capability toward MB in different mixed dye systems, with high removal efficiencies of 73–89%. These results demonstrate that the high-performance carbon adsorbent prepared from small precursors via low-temperature carbonization shows great potentials in wastewater treatment.Keywords:nano-carbon adsorbent;small precursors;adsorption;methylene blue;reactive blue 19;selective capability
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DOI
PubMed
高影响因子
Nanomaterials
·
2018
·Vol. 9
·期 1
·10
·
IF 3.504
Yuelong Xu,Bin Ren,Ran Wang,Lihui Zhang,Tifeng Jiao,Zhenfa Liu
In the present study, nanoscale rod-shaped manganese oxide (MnO) mixtures were successfully prepared from graphitic carbon nitride (C3N4) and potassium permanganate (KMnO4) through a hydrothermal method. The as-prepared MnO nanomixtures exhibited high activity in the adsorption and degradation of methylene blue (MB). The as-synthesized products were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), surface area analysis, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Furthermore, the effects of the dose of MnO nanomixtures, pH of the solution, initial concentration of MB, and the temperature of MB removal in dye adsorption and degradation experiments was investigated. The degradation mechanism of MB upon treatment with MnO nanomixtures and H2O2was studied and discussed. The results showed that a maximum adsorption capacity of 154 mg g−1was obtained for a 60 mg L−1MB solution at pH 9.0 and 25 °C, and the highest MB degradation ratio reached 99.8% under the following optimum conditions: 50 mL of MB solution (20 mg L−1) at room temperature and pH ≈ 8.0 with 7 mg of C, N-doped MnO and 0.5 mL of H2O2.Keywords:hydrothermal method;manganese oxide;adsorption;degradation;nanomixtures
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DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2025
·Vol. 172
·期 4
·045502
·
IF 3.3
Lingling Zhang,Shuangru Yang,Yuge Liu,Yongmei Jia,Zhiguo Li
Understanding the electron transfer performance of DNA self-assembled monolayers (SAMs) on a transducer substrate was important for constructing DNA electrochemical sensors with high sensitivity. Here we immersed the gold electrodes in mixed solutions comprising thiol-modified stem-loop DNA (SL-DNA) or linear DNA (L-DNA) terminally bound with methylene blue (MB), and aliphatic thiols (HOC6SH, C6SH, HOOCC5SH, H2NC6SH, HOC11SH, C12SH, or HOOCC10SH) to obtain DNA/thiols mixed self-assembled monolayers (SAMs). MB electron transfer performances through SL-DNA/thiols and L-DNA/thiols mixed SAMs were investigated by cyclic voltammetry (CV). Our results showed that the mixed assembly of thiols with DNA was conducive to MB electron transfer. The electron transfer rate (ks) values of MB through L-DNA SAMs were bigger than those through SL-DNA SAMs, indicating that the flexibility of DNA chains was important to MB electron transfer. Thiols chain length or terminal groups influenced ks of MB significantly, that increasing NaCl or MgCl2 concentrations in solution around DNA availed MB electron transfer, and Mg2+ advanced MB electron transfer more than Na+, and that the stability of L-DNA/thiols SAMs was much better than SL-DNA/thiols SAMs. These conclusions might provide a reference for studying DNA electron transfer mechanisms or designing DNA or RNA electrochemical sensors with optimal performance.
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高影响因子
EUROPEAN POLYMER JOURNAL
·
2019
·
IF 3.621
Yahuan Wang,Zhiwei Wang,Shaomin Wang,Zhimin Chen,Jiafu Chen,Yong Chen,Jianwei Fu
Developing excellent dye adsorbent with high adsorption capability and good reusability and clarifying the interaction mechanism between adsorbent and adsorbate are highly desired for eliminating water pollution. Herein, we present a novel magnetic adsorbent Fe 3 O 4 /poly(cyclotriphosphazene-co-4,4′-sulfonyldiphenol) nanotube modified by glacial acetic acid (defined as Gl-PZSNTs-Fe 3 O 4 ) to remove cationic dye methylene blue (MB) from aqueous solution. Compared with the unmodified magnetic PZSNTs-Fe 3 O 4 , the Gl-PZSNTs-Fe 3 O 4 exhibits rapid adsorption rate and high adsorption capacity. The adsorption equilibrium data was fitted well with Langmuir model, and the adsorption kinetics obeyed the pseudo-second-order kinetics model and Elovich model. Thermodynamic analysis showed that the MB adsorption onto the Gl-PZSNTs-Fe 3 O 4 was endothermic and spontaneous. Especially, through contrasting the adsorption behavior of Gl-PZSNTs-Fe 3 O 4 and PZSNTs-Fe 3 O 4 towards MB dye, we highlighted the importance of glacial acetic acid modification for enhancing the adsorption capacity of the Gl-PZSNTs-Fe 3 O 4 . Meanwhile, we also proposed the adsorption mechanism of the Gl-PZSNTs-Fe 3 O 4 towards MB dye.
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高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
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2022
·Vol. 24
·期 4
·1-15
·
IF 2.533
Wang Zhentao,Hasan Jaafar,Wang Jingjing,Zhang Caiwei,Iqbal Waheed,Chang Ninghui,Qin Chuanguang
The treatment of dye-bearing wastes by adsorption using low-cost synthetic adsorbents is urgently needed and challenging because it offers the dual benefit of water treatment and waste management. Herein, the flower-like MoS 2 /g-C 3 N 4 nanocomposites with a size range of 200–400 nm and a specific surface area of 70.656 m2/g were synthesized as new methylene blue (MB) adsorbent materials. Their adsorption mechanisms and influences of pH, adsorbent dosage, concentration, and temperature on the adsorption properties were investigated by batch sorption experiments. Adsorption isotherm data were fitted with the Langmuir model, and the adsorption kinetic characteristics conform to the quasi second-order kinetic equation. According to thermodynamic data, methylene blue (MB) adsorption was endothermic and spontaneous, exhibiting a maximum adsorption capacity of 278.4 mg/g at 45 °C. Additionally, the impact of MB effluent on the germination of chickpea and wheat was studied contrastively with treatment of the tested materials. The results indicated that adequate adsorption of flower-like MoS 2 /g-C 3 N 4 nanocomposite could potentially treat wastewater from the textile industry to be used for irrigation and solve the problem of textile effluent disposal. Graphical abstract
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高影响因子
Nanoscale Research Letters
·
2015
·Vol. 10
·期 1
·1-9
·
IF 2.779
Zhang Li,Jamal Ruxangul,Zhao Qin,Wang Minchao,Abdiryim Tursun
The nanocomposite materials of poly(3,4-ethylenedioxythiophene)/graphene oxide (PEDOT/GO), poly(3,4-ethylenedioxythiophene)/MnO 2 (PEDOT/MnO 2 ), and poly(3, 4-ethylenedioxythiophene)/graphene oxide/MnO 2 (PEDOT/GO/MnO 2 ) were successfully prepared by facile and template-free solution method. The structure and morphology of nanonanocomposites were characterized by Fourier transform infrared spectroscopy (FTIR), ultraviolet–visible absorption spectra (UV–vis), field emission scanning electron microscope (FESEM), X-ray diffraction (XRD), and energy-dispersive X-ray spectroscopy (EDX), respectively. The catalytic activities of nanocomposites were investigated through the degradation processes of methylene blue (MB) solution under dark, UV light, and nature sunlight irradiation, respectively. The results displayed that nanocomposites were successfully synthesized, and PEDOT/GO had higher conjugation length and doped degree than pure PEDOT. However, the introduction of MnO 2 could lead to the reduction of conjugation length and doped degree in PEDOT/MnO 2 and PEDOT/GO/MnO 2 nanocomposites. The field emission scanning electron microscope (FESEM) analysis also showed that both MnO 2 and GO had some effect on the morphology of nanocomposites. The catalytic activities of pure PEDOT and nanocomposites were in the order of PEDOT/GO/MnO 2 > PEDOT/MnO 2 > PEDOT/GO > pure PEDOT. Besides, the catalytic results also showed that the highest degradation efficiency of MB after 7 h occurred in the PEDOT/GO/MnO 2 composite in three irradiation.
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高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2023
·Vol. 34
·期 4
·1751-1764
·
IF 4
Zhou Zhuyou,Zou Congyang,Wang Yong,Liu Menghe,Ji Yufeng
A one-step solvothermal synthesis technique was employed to fabricate C 60 /MIL-101(Fe) composites. The C 60 /MIL-101(Fe) composites showed a better performance in the degradation of methylene blue (MB) and tetracycline hydrochloride (TCH) when compared to MIL-101(Fe) in the photo-Fenton system, which can be credited to the charge transfer and separation facilitated by the addition of C 60 . Results showed that C 60 /MIL-101(Fe) had the capacity to nearly completely eliminate TCH and MB over a broad pH range. The catalysts demonstrated remarkable catalytic degradation on various organic pollutants and water samples. Through active substance quenching experiments and EPR, it was determined that hydroxyl radical (·OH) is the main factor in the photocatalytic reaction process.
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高影响因子
DALTON TRANSACTIONS
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2025
·
IF 3.3
Zhongmin Liu,Wencheng Wang,Xiaolei Zhang,Yong-zheng Zhang,Xiaoli Wang,Zhen Li,Yumei Li,Jiahui Zhang,Jinyong Fan,Longlong Geng
The hierarchical pores and oxygen vacancies play a vital role for enhancing adsorption behaviors of metal organic framework (MOFs). Herein, the hierarchical Ti-MOF with oxygen vacancies was synthesized via a temperature-regulated linker defect engineering strategy for the first time. The materials were characterized by XRD, FTIR, TGA, XPS, SEM, TEM, EPR, and BET analysis. The incorporation of hierarchical pores and oxygen vacancies facilitate diffusion of guest molecules and endow the surface of the material with negative electronegativity, resulting in efficient adsorption performance for methylene blue (MB) dye over a wide pH range. Isotherm studies indicate that the adsorption process follows a Langmuir isotherms model, the maximum adsorption capacity was 525.7 mg g-1. Kinetic studies indicate that the adsorption process follows a pseudo-second-order kinetic model, the adsorption equilibrium time was only 10 min. The ultra-large adsorption capacity and ultra-low adsorption equilibrium time originated from the hierarchical pores and oxygen vacancies, exceeding the performance of most reported MOFs. Thermodynamic studies reveal that adsorption processes are spontaneous and endothermic in nature. The adsorption mechanism can be attributed to electrostatic attraction, π-π stacking, hydrogen band, n-π* interactions and pore-filling. Reusability studies and continuous operation on a fixed bed both exhibited usage potential for practical applications. This research provides valuable insights for the synthesis of novelty adsorbents with an ultra-large adsorption capacity and ultra-high adsorption rate in full pH range, and broadened their potential applications in the continuous removal of cationic dye wastewater.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2017
·Vol. 93
·期 3
·698-709
·
IF 3.135
Shuaiqi Zhao,Ding Chen,Fuhua Wei,Nini Chen,Zhao Liang,Yun Luo
BACKGROUND Dye wastewater is causing a serious problem to the environment and to human health. A considerable amount of colored wastewater is generated from many industries. Moreover, many dyes in the wastewater are believed to be toxic and even carcinogenic. Therefore, the removal of dyes from wastewater is necessary and urgent. RESULTS The adsorption kinetics, isotherms and intra-particle diffusion model were determined from experimental data, and the results indicated that the pseudo-second-order kinetic model and the Langmuir adsorption isotherm matched well the adsorption of MB onto GO/MOFs. Thermodynamic parameters revealed that the adsorption of MB by GO/MOFs was spontaneous and exothermic. The adsorption capacity was greatly improved in acidic or alkaline aqueous solution. The maximum adsorption capacity of GO/MOFs reached 274 mg g -1 , higher than most previously reported adsorbents. Also, the adsorbent could be used at least five times after washing with ethanol. CONCLUSION A microwave-assisted ball milling method was used successfully to synthesize Ni-MOFs and GO/MOFs. Because of electrostatic interaction and acid–base interaction, both acidic and alkaline aqueous solutions were found to favor the adsorption of MB by GO/MOFs, this being different from previous reports. GO/MOFs also showed acceptable reusability after being regenerated by ethanol. All the results suggest that MOFs prepared by microwave-assisted ball milling give the prospect of removal of MB from aqueous solution. © 2017 Society of Chemical Industry
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Yawei Shi,Guobin Song,Anqi Li,Jun Wang,Haonan Wang,Ya Sun,Guanghui Ding
A series of composite aerogels with different precursor mass ratios were prepared from graphene oxide (GO) and chitosan (CS) by conducting the crosslinking step after lyophilization, the method of which was recently found beneficial to enhance the adsorptive properties of aerogels . The composite aerogels were then employed for the adsorption of methyl orange (MO) and methylene blue (MB) from water, and the one prepared at GO:CS= 1:2 (w/w) was selected as the optimal compromising the adsorption and mechanical properties. The maximum adsorption amounts of MO and MB were calculated to be 543.4 and 110.9 mg/g at 25 °C. Especially, the effects of pH on adsorption of MO and MB in both single and binary systems were investigated in detail. The aerogel possessed pH-responsive feature for single dye adsorption, tending to adsorb MO at low pH while to adsorb MB at high pH. In the binary system, the pH-responsive feature remained and selective adsorption was observed at low initial dye concentration. In contrast, synergistic adsorption occurred instead at high initial concentration, and MB and MO could be efficiently removed simultaneously in the whole pH range of 3–11.
研究领域:
环境科学
·
材料科学
·
化学工程
·
水处理
·
吸附技术
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高影响因子
危险品化学品经营许可证（带存储）