BIORESOURCE TECHNOLOGY
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2021
·
IF 9.642
Qingling Zhang,Youliang Cheng,Changqing Fang,Jiayu Shi,Hanzhi Han,Mengyao Li,Jiarui Zhao
Monolithic carbon foams are promising materials for adsorption due to the easy recyclability and without secondary-pollution. However, poor adsorption efficiency for organic pollutants limits its practical application. Hence, this work proposed a novel monolithic porous carbon foam by a facile carbonization approach as freestanding electrodes to remove the organic dyes. The prepared carbon foam derived from waste cigarette filters and zeolitic-imidazolate frameworks-8 with well-developed pores, and the calculated surface area is 1457 m 2 ·g −1 , and exhibited an outstanding removal efficiency for methylene blue in aqueous. The maximum adsorption capacity for methylene blue can reach up to 1846.7 mg·g −1 under the applied voltage of −1.2 V. Importantly, as-prepared carbon foams possessed excellent stability, and the removal efficiency can remain above 85% after 5 cycles. Thus, obtained porous carbon foams in this paper as a free standing electrode is expected to be promising materials of adsorbent besides supercapacitors.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2021
·
IF 5.279
Yaozhong Hu,Jiaxin Gu,Yi Wang,Jing Lin,Huaning Yu,Feier Yang,Sihao Wu,Jia Yin,Huan Lv,Xuemeng Ji,Shuo Wang
Tea polyphenol of epigallocatechin-3-gallate (EGCG) has been verified to possess multiple biological activities. Interleukin-23 (IL-23) is a heterodimeric cytokine consisting of two subunits of IL-23p19 and IL-12p40, with the functionality in regulating the production of cytokines under physiological or pathological conditions. By serendipity, the raised expression of IL-23 was observed after treating cells with EGCG, whereas the detailed mechanism remains poorly understood. This study was proposed to investigate the signaling related to EGCG-induced IL-23. The raised expression of IL-23 was confirmed primarily by intraperitoneally injecting with different concentrations of EGCG (0, 20, 50, 80 mg/kg) into BALB/c mice, and the raised expression was confirmed by quantitative real-time polymerase chain reaction (qRT-PCR) and western blot. Results from enzyme-linked immunosorbent assay (ELISA) revealed the increase of IL-23 in serum from 116.09 to 153.90 pg/mL after treating with EGCG. The same results were also observed in RAW264.7 and peritoneal macrophages after treating with EGCG (0, 1, 5, 10, 25 μM) with the increased tendency of IL-23 in cultural medium (7.98 to 25.38 pg/mL for RAW264.7; 3.64 to 260.93 pg/mL for peritoneal macrophages). After preliminary exploration of the signaling related to the increased IL-23, the classical signaling pathways and key transcription factors, such as nuclear factor kappa-B (NF-κB), mitogen-activated protein kinase (MAPK) signaling pathways, and interferon regulatory factor 5 (IRF5), were demonstrated with no relevant contribution. A further study revealed the involvement of the key transcription factor of BATF2, which could antagonistically modulate the transcription and translation of IL-23. The signaling of STAT3-BATF2-c-JUN/ATF2-IL-23 has been further verified in RAW264.7 macrophages using the STAT3 inhibitor of AG490 and the activator of Colivelin TFA. The results indicated that EGCG inhibits the phosphorylation of STAT3 to facilitate the decreased level of BATF2, which contributed to the increased level of IL-23 by the enhancing heterodimerization of c-JUN and ATF2.
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CHEMOSPHERE
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2021
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IF 7.086
Han Chen,Yanan Yu,Yu Yu,Jiexu Ye,Shihan Zhang,Jianmeng Chen
Effective electron transfer (ET) between microorganisms and electrodes is essential for the toluene degradation and power generation in a microbial fuel cell (MFC). In this work, the neutral red, with excellent electrochemical reversibility and compatible redox potential as NADH/NAD + , was selected as electron mediator to boost the performance of the MFC. Experimental results revealed that, with the 0.5 μM neutral red, the removal efficiency and coulombic efficiency of the gaseous toluene powered MFC was increased by ~19% and ~400%, respectively. However, further increase in neutral red concentration resulted in a decreased in removal efficiency and coulombic efficiency, which was attributed by the toxicity of neutral red to the microbes. The microbial community analysis indicated that, with the dosage of the neutral red, the dominated bacteria shifted from Geobacter to Ignavibacteriales , resulting in a high coulombic efficiency. With the further increase in the neutral red, the amount of Ignavibacteriales gradually decreased and thus the coulombic efficiency declined at a high neutral red concentration. Based on the cyclic voltammetry analysis, an electron transport pathway involving neutral red, cytochromes , and OMCs in neutral red mediated MFC was proposed. Overall, the dosage of neutral not only enhanced the electron transfer but also induced the growth of the exoelectrogens, and thus significantly improve the MFC performance.
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RSC Advances
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2021
·Vol. 11
·期 14
·8255-8263
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IF 3.361
Jun Wu,Wei Liu,Rui Zhu,Xiashi Zhu
A special self-designed device based on poly-1-vinyl-3-pentylimidazole hexafluorophosphate (PILs-C5) solid-phase extraction and high performance liquid chromatography (HPLC) is proposed as a novel method for the on-line separation and analysis of Rhodamine B (RhB) dye. Single factor experiment design and orthogonal experiment design were used to optimize the experimental parameters, such as pH, the amount of PILs-C5, sample volume, flow rate, eluent type, eluent concentration, eluent volume, and the flow rate of eluent. Under the optimized conditions, the linear range was 0.02–2.4 μg mL−1, with the correlation coefficients (R2) of 0.997. The limit of detection (LOD) and limit of quantification (LOQ) were 0.004 μg mL−1 and 0.02 μg mL−1, respectively. The extraction capacity was 6.22 mg g−1, and enrichment ratio was 15. The extraction mechanism and the post-treatment method of PILs-C5 were also studied. This method was applied to analyze RhB in a wide variety of real samples with satisfactory results.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2020
·Vol. 138
·期 19
·50401
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IF 2.52
Faming Yang,Chen Xiong,Yingfu Lian,Xiaojun Wang,Zhimei Wei,Shengru Long,Gang Zhang,Jie Yang
Water-in-oil emulsions separation plays a critical role in industrial wastewater treatment. Membrane technology has attracted much interest in water-in-oil emulsions separation field for its excellent separation performance and facile processing method. However, versatile membrane with better solvent-resistance is still absent in chemical industry. In this work, oxidized polyarylene sulfide sulfone (O-PASS) membrane was severed as substrate, on which a hydrophobicity surface was built via coating of octadecyltrichlorosilane (OTS). And polydopamine (PDA) layer was employed and acted as connector between OTS and O-PASS membrane due to its abundant active hydroxyl group. The maximum water contact angle was 132.6° indicating good hydrophobicity of the membrane. Finally, the OTS/PDA/O-PASS composite membranes showed good separation performance for corrosive emulsions: the rejection and flux were 93.0% and 10.0 L/m 2 h for water-in-dichloromethane emulsions, and the rejection and flux were 92.3% and 34.6 L/m 2 h for water-in-n-hexane emulsions. The OTS/PDA/O-PASS composite membrane is a new candidate membrane for water-in-oil emulsions separation. In addition, the superior performance of the composite membrane under harsh environment conditions ensures its usefulness in resistance aggressive solvent.
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Journal of Functional Foods
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2020
·
IF 3.701
Yilong Teng,Haohui Liang,Zeng Zhang,Yanming He,Yanna Pan,Shilin Yuan,Xiao Wu,Qingjie Zhao,Hongjie Yang,Ping Zhou
A proteoglycan, namely FYGL extracted from Ganoderma lucidum , was proved previously efficient for anti-diabetes in vivo . However, many medicine functions of FYGL have not been revealed, such as immunoregulation, an important function of Ganoderma in the traditional Chinese medicine. In this work, we firstly investigated the distribution of FYGL orally administrated by mice and found that FYGL was available in small intestine and viscera organs and enriched mostly in liver. Consequently, we studied the immunoregulation mechanism of FYGL in RAW 264.7 macrophages. The results showed that FYGL could induce initially ROS and trigger Ca 2+ ions influx into cells, leading to the activation of NF-κB and MAPK signaling to secret NO and cytokines for immune responses, and the promotion of phagocytosis. Meanwhile, FYGL absorbed in cells could reduce ROS, therefore preventing mitochondrial membrane from damage for cells safety. The results provided the immunoregulation basis of FYGL potentially applicable in clinics.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
Cheng Qian,Juanjuan Yin,Jianxun Zhao,Xuetong Li,Sufeng Wang,Zhenhua Bai,Tifeng Jiao
Water pollution is an urgent problem in the world today. The discharge of industrial wastewater such as organic dyes will cause serious pollution to water bodies, thereby affecting people's lives. Facing the increasingly severe water pollution problem, the demand for efficient dye degradation materials is also increasing. Artemia cyst shell (ACS), as a natural biological material, has a large number of microporous structures, so it can be used as a carrier for high-efficiency nanoscale catalytic materials. In this work, ACS-ZnO nanocomposites were successfully synthesized by a combination of high-temperature calcination and hydrothermal synthesis, and their properties and photocatalytic degradation properties for dyes were studied. Artemia cyst shells are calcined at high temperature to form an organic porous skeleton after pretreated. The structure is then loaded with ZnO nanoparticles to synthesize the target product through a hydrothermal reaction. Finally, the material is used to degrade methylene blue, Rhodamine B, and neutral red respectively under light irradiation. The results show that the photodegradation effect of ACS-ZnO nanocomposites with a certain ZnO content is significantly stronger than that of pure ZnO nanoparticles. At the same time, cyclic experiments show the high stability and sustainable use of this composite material.
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ACS Omega
·
2021
·
IF 3.512
Ran Wang,Min Li,Jingxin Zhou,Lexin Zhang,Jianmin Gu,Mingli Wang,Tifeng Jiao
In this work, Langmuir–Blodgett (LB) composite thin films were successfully prepared using black phosphorus nanosheets (BPNS) and dye molecules. Black phosphorus (BP) was first exfoliated in isopropanol solution to form BPNS, and then, BPNS were modified with 4-azidobenzoic acid (Az-BPNS) to improve their stability. The characterization results showed that the synthesized Az-BPNS-dye LB films have a uniform and ordered structure. In addition, the synthesized Az-BPNS-dye LB films exhibit excellent photoelectrochemical performance, and Az-BPNS-methylene blue (MB) produces higher photocurrent compared to Az-BPNS-Neutral red (NR) films. The current work shows an effective way to prepare functionalized BP-based materials and provide evidence for their application in optoelectronic devices.
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Applied Sciences-Basel
·
2020
·Vol. 10
·期 23
·8529
·
IF 2.474
Junyi Wang,Tianlu Chen,Biao Xu,Yueqiu Chen
Porous rGO/SiO2nanocomposites with a “core-shell” structure were prepared as an efficient adsorbent for the liquid-phase adsorption of cationic neutral red (NR) dye. The samples were characterized with powder X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TG), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and N2and water vapor adsorption/desorption methods. The NR removal ability and kinetics of the adsorption process of SiO2and the rGO/SiO2nanocomposites were investigated at 298 K. The rGO/SiO2nanocomposite SG 0.30 showed a superior adsorption of NR dye. In regard to NR at pH 5, we measured a superior adsorption capacity of 66.635 mg/g at an initial NR concentration of 50 mg/L. The experimental adsorption capacity of SG 0.30 was 3.791 times higher than that of SiO2. Then, we compared the results with similar materials used for NR removal. Moreover, the water adsorption sites provided by the nitrogen- and oxygen-containing groups might be one of the reasons for the increased adsorption of water vapor. The broad range of properties of the rGO/SiO2nanocomposite, including its simple synthesis, ability to be mass prepared, and strong adsorption properties, makes it a truly novel adsorbent that can be industrially produced, and shows potential application in the treatment of wastewater-containing dyes.Keywords:graphene;Silica;carbon-materials;nanocomposite;neutral red;surface modification;adsorption;Water Vapor Adsorption
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WATER AIR AND SOIL POLLUTION
·
2020
·Vol. 231
·期 2
·1-10
·
IF 1.9
Yang Xuewan,Xiong Zhong,Meng Xiao,Zhu Haishan,Xia Yanzhi
There are few activated carbons that are capable of adsorbing both ionic and solvent dyes. In this paper, activated carbon was prepared from Chondrus crispus as a marine material by a high-temperature carbonization procedure for the first time. The Chondrus crispus activated carbon (CCAC) can effectively adsorb methylene blue (MB) as a cationic dye, methyl orange (MO) as an anionic dye, oil red O (ORO) as a solvent dye, and other eight dyes. The adsorption capacities for MB and MO in water, and ORO in n -hexane are 132.81, 49.48, and 33.17 mg g −1 , respectively. CCAC was characterized by scanning electron microscope (SEM), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, Brunauer-Emmett-Teller (BET) method, and zeta potential analysis. CCAC was proved to have a porous and gully structure with a specific surface area of 60.0687 m 2 g −1 . The effects of initial dye concentration, dosage, pH, contact time, and temperature on the adsorption were investigated. The adsorption kinetic data proved that the adsorption process accorded with pseudo-second-order model. The adsorption isotherms fit to both the Langmuir and Freundlich models. The broad-spectrum dye adsorption mechanism is attributed to the π-π interaction between CCAC and dye.
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Journal of Water Process Engineering
·
2020
·
IF 3.465
Yanqin Rong,Yu Huang,Pengyue Jin,Cheng Yang,Zhihui Zhong,Chuan Dong,Wenting Liang
The versatile three-dimensional magnetic sulfur/nitrogen co-doped reduced graphene oxide nanomaterials (3D-MSNGs) have been constructed and generated via interfacial coordination assembly of three-dimensional sulfur/nitrogen dual-doped reduced graphene oxide (3D-SNG) with concurrent modification by formed magnetic Fe 3 O 4 . Using ferric ions as iron source, the as-obtained nanohybrid 3D-MSNG-1 possesses abundant hierarchical porous structure on graphene network, large BET surface area and favorable magnetic properties, which is proved excellent adsorption capacity and easy magnetic separation. When 3D-MSNG-1 was utilized to absorb the dyes of methylene blue (MB), congo red (CR) and neutral red (NR) considered as cationic, anionic and neutral model dye molecules, respectively, the adsorption equilibrium for MB, CR and NR were rapidly achieved in 15 min. The adsorption isotherm fits Langmuir adsorption model well with the maximum uptake capacity for MB, CR and NR high to 171.53 mg/g, 909.09 mg/g and 877.19 mg/g, respectively. Meanwhile, an efficacious treatment of ternary dyes mixed solution and a good recyclability manifests that 3D-MSNG-1 is supposed to be a superior adsorbent in the areas of water treatment .
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LANGMUIR
·
2020
·
IF 3.557
Xiujuan Liu,Ying He,Guangcong Zhang,Ran Wang,Jingxin Zhou,Lexin Zhang,Jianmin Gu,Tifeng Jiao
Understanding photocurrent conversion of layered double hydroxide (LDH) materials will be a key step in the future application of these materials to light-capturing molecular devices. In the present study, ultrathin nickel–iron layered double hydroxide/dye (NF-LDH/dye) Langmuir–Blodgett (LB) semiconductor films were prepared using an LB device and deposited on an indium tin oxide (ITO) substrate as a photoanode. The photoelectric conversion efficiency of the prepared LB semiconductor film materials was tested. A comparative experiment was performed to effectively explore the photoelectric conversion performances of the LB semiconductor film materials. Specifically, the NF-LDH cast film electrode, the dye cast film electrode, and an ultrathin composite LB film electrode were used as typical samples to explore photoelectric conversion performances. The electrochemical workstation was used to study the photocurrent density, linear scanning voltammetry curve, and electrochemical impedance spectroscopy of LB film electrodes with different layers. The results show that the film electrode cast by LDH alone or dye alone produces weak photocurrent. The photoelectric conversion efficiency of the LB film electrode is enhanced due to the different dyes’ molecular structures and/or aggregations on the surface of LDH with various morphological patterns. The combined NF-LDH/dye composite LB film photoelectrode can generate a photocurrent that is 2–5 times stronger than the raw material, and the stable use efficiency is more than 92%. Present obtained composite LB films demonstrated a uniform morphology and good photoelectric conversion ability. This work provides a useful reference for the field of LDH semiconductor optoelectronic devices and solar cells.
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