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Insight into Organic Pollutant Adsorption Characteristics on a g-C3N4 Surface by Attenuated Total Reflection Spectroscopy and Molecular Dynamics Simulation.

Yan Xiong, Can Zhang, Ming Duan, Jie Chen, Shenwen Fang, Jun Li, Peng Shi, Jintian Ren, Haiqin Wan,

Herein the adsorption characteristics of zwitterionic dye pollutant Rhodamine B (Rh<sup>+</sup>B<sup>-</sup>) on a g-C<sub>3</sub>N<sub>4</sub> surface were investigated by both an attenuated total reflection spectroscopy (ATRS) experiment and a molecular dynamics simulation (MDS). For experimental investigation, g-C<sub>3</sub>N<sub>4</sub> was coated on a silica optical fiber (SOF) surface to fabricate an adsorption film. ... Read more >>

Langmuir (Langmuir : the ACS journal of surfaces and colloids)
[2021, 37(25):7655-7667]

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In-situ investigation of dye pollutant adsorption performance on graphitic carbon nitride surface: ATR spectroscopy experiment and MD simulation insight.

Jun Li, Yan Xiong, Haiqin Wan, Jie Chen, Shenwen Fang, Xiaoqing Song, Rui Li, Ming Duan, Ruiqi Hu,

The adsorption performances on graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) surface were investigated for organic dye pollutants by both experimental and calculation methods. For experimental investigation, adsorption thermodynamics and kinetics results were in-situ obtained and evaluated. With [Formula: see text] by Langmuir modeling<sup>,</sup> g-C<sub>3</sub>N<sub>4</sub> showed superior adsorption spontaneity of MB<sup>+</sup> >MO<sup>-</sup>. With ... Read more >>

J Hazard Mater (Journal of hazardous materials)
[2021, 418:126297]

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N-methylene phosphonic chitosan aerogels for efficient capture of Cu2+ and Pb2+ from aqueous environment.

Tao Liu, Shaohua Gou, Yang He, Shenwen Fang, Lihua Zhou, Guangjun Gou, Lang Liu,

In this paper, N-methylene phosphonic acid chitosan (NPCS-PEI) was synthesized from chitosan, phosphorous acid, formaldehyde and hyperbranched polyethyleneimine (PEI), and Cu<sup>2+</sup> and Pb<sup>2+</sup> removal performance was examined in aqueous solution. NPCS-PEI exhibited three-dimensional porous architectures, with a specific surface area of 490.61 m<sup>2</sup>/g. The effects of pH, initial concentration, adsorption time, ... Read more >>

Carbohydr Polym (Carbohydrate polymers)
[2021, 269:118355]

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Preparation of poly-dopamine-silk fibroin sponge and its dye molecular adsorption.

Ming Duan, Qingqing Tang, Manlin Wang, Mengjuan Luo, Shenwen Fang, Xiujun Wang, Peng Shi, Yan Xiong,

This paper proposes a process for fabricating a poly-dopamine-silk fibroin sponge (PDA-SF) by using dopamine self-assembly and coating the skeleton of a silk fibroin sponge. The PDA-SF sponge was characterized by SEM, TEM, XPS, XRD and FT-IR. It was found that the sponge exhibits sheet structures with a pore size ... Read more >>

Water Sci Technol (Water science and technology : a journal of the International Association on Water Pollution Research)
[2020, 82(11):2353-2365]

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Application of choline-based deep eutectic solvent for the extraction of crude-oil contaminated soils.

Ming Duan, Mengjuan Luo, Ziyi Yang, Yan Xiong, Peng Shi, Shenwen Fang, Shan Qin,

Choline-based deep eutectic solvents (DESs) have many outstanding features as they are easy to prepare, inexpensive, low-toxic, low volatile, and biodegradable, which make them increasingly attractive in industrial chemistry and green chemistry. In this paper, the abilities of three different kinds of DESs for crude oil removal from contaminated soils ... Read more >>

Environ Technol (Environmental technology)
[2021, 42(18):2896-2901]

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Chemisorption mechanism of crude oil on soil surface.

Ziyi Yang, Shenwen Fang, Ming Duan, Yan Xiong, Xiaodong Wang,

One of the main challenges in cleaning crude oil-contaminated soil is the unknown adsorption mechanism between residual oil and soil. Herein, infrared spectrometer (IR) is used to detect the existence of dibutylphthalate (DBP) and pelargonamide on montmorillonite (MMT) surface. In addition, after the adsorption of DBP and pelargonamide on MMT, ... Read more >>

J Hazard Mater (Journal of hazardous materials)
[2020, 386:121991]

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Insight into the Synergistic Effect of Adsorption-Photocatalysis for the Removal of Organic Dye Pollutants by Cr-Doped ZnO.

Jie Chen, Yan Xiong, Ming Duan, Xiang Li, Jun Li, Shenwen Fang, Sha Qin, Run Zhang,

The adsorption of dye molecules is an important process for the photodegradation removal of dye pollutants. In this work, a semiconductor photocatalyst of Cr-doped ZnO nanorods (Cr-ZnO NRs) was synthesized, and its adsorption-photocatalysis synergy (APS) effect was investigated for anionic methyl orange (MO-) and cationic methylene blue (MB+). The detailed ... Read more >>

Langmuir (Langmuir : the ACS journal of surfaces and colloids)
[2020, 36(2):520-533]

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Hydrazine-Functionalized guar-gum material capable of capturing heavy metal ions

Junchi Ma, Ming Duan, Shenwen Fang, Peng Shi,

This research demonstrates the capability of guar-gum modified with salicylhydrazine to remove Ni2+, Co2+ and Cr3+ from aqueous solution. Structural characterization showed that aldehydes guar gum was grafted with salicylhydrazine with morphology. The as-prepared nanocomposite had a large surface area and hydrophobicity, which ensured its good sorption ability and convenience ... Read more >>

(Carbohydrate polymers.)
[2019, 223:Not Available]

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Insight into the Adsorption-Interaction Mechanism of Cr(VI) at the Silica Adsorbent Surface by Evanescent Wave Measurement.

Yan Xiong, Jie Chen, Ming Duan, Xiang Li, Jun Li, Can Zhang, Shenwen Fang, Rui Liu, Run Zhang,

The investigation of adsorption performance at the adsorbent surface can help to reveal the treatment mechanism and improve the treatment efficiency of adsorption technology for heavy metal ions (HMIs). This work developed a methodology to investigate the adsorption behavior of HMI Cr(VI) at the silica surface by confined near-field evanescent ... Read more >>

Langmuir (Langmuir : the ACS journal of surfaces and colloids)
[2019, 35(45):14414-14427]

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Synthesis and flocculation of a novel flocculant for treating wastewater produced from polymer flooding.

Jun Li, Yan Xiong, Xiujun Wang, Fei Wang, Shenwen Fang, Ming Duan,

Preparation of a flocculant which can have high-oil removal and no viscous flocs production for treating oily wastewater produced from polymer flooding (OWPF) is meaningful work. In this paper, a novel flocculant (denoted as PDC<sub>12</sub>DM) for treating OWPF was prepared by copolymerization of dodecyl dimethylallyl ammonium chloride (C<sub>12</sub>DM) and dimethyl ... Read more >>

Environ Technol (Environmental technology)
[2021, 42(11):1715-1722]

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Hydrazine-Functionalized guar-gum material capable of capturing heavy metal ions.

Junchi Ma, Shenwen Fang, Peng Shi, Ming Duan,

This research demonstrates the capability of guar-gum modified with salicylhydrazine to remove Ni<sup>2+</sup>, Co<sup>2+</sup> and Cr<sup>3+</sup> from aqueous solution. Structural characterization showed that aldehydes guar gum was grafted with salicylhydrazine with morphology. The as-prepared nanocomposite had a large surface area and hydrophobicity, which ensured its good sorption ability and convenience ... Read more >>

Carbohydr Polym (Carbohydrate polymers)
[2019, 223:115137]

Cited: 1 time

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Preparation of a selective flocculant for treatment of oily wastewater produced from polymer flooding and its flocculant mechanism.

Fei Wang, Hongmei Lü, Xiujun Wang, Bo Jing, Ming Duan, Yan Xiong, Shenwen Fang,

There are residual polymers in the oily wastewater produced from polymer flooding (OWPF); keeping the residual polymer in the water during the flocculation is meaningful and challenging. In this paper, a selective flocculant (denoted as PDC10) which can remove the oil while keeping partially hydrolyzed polyacrylamide (HPAM) in water was ... Read more >>

Water Sci Technol (Water science and technology : a journal of the International Association on Water Pollution Research)
[2019, 79(9):1648-1656]

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Synthesis of hydrazine-grafted guar gum material for the highly effective removal of organic dyes.

Ming Duan, Junchi Ma, Shenwen Fang,

The galacylhydrazine modified guar gum (GG-GH) was prepared through oxidation and condensation. GG-GH demonstrated highly efficient removing performance for organic dyes in large volume of water sample solutions, a rapid uptake of dyes was observed and the equilibrium is achieved in 0.5 h. The maximum adsorption capacity for MB, RhB, MeO ... Read more >>

Carbohydr Polym (Carbohydrate polymers)
[2019, 211:308-314]

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Synthesis of hydrazine-grafted guar gum material for the highly effective removal of organic dyes

Ming Duan, Junchi Ma, Shenwen Fang,

The galacylhydrazine modified guar gum (GG-GH) was prepared through oxidation and condensation. GG-GH demonstrated highly efficient removing performance for organic dyes in large volume of water sample solutions, a rapid uptake of dyes was observed and the equilibrium is achieved in 0.5 h. The maximum adsorption capacity for MB, RhB, ... Read more >>

(Carbohydrate polymers.)
[2019, :p. .]

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Characterization and differentiation of the adsorption behavior of crystal violet and methylene blue at the silica/water interface using near field evanescent wave.

Ming Duan, Jiayi Wu, Yan Xiong, Shenwen Fang, Jie Chen,

Different molecular structures lead to different adsorption performances. In this work, the adsorption behavior of two organic dyes, namely, crystal violet (CV, triphenylmethane dye of symmetric structure) and methylene blue (MB, azo dye of linear structure), were investigated, characterized and differentiated at the silica/water interface using the total internal reflection ... Read more >>

Soft Matter (Soft matter)
[2018, 14(36):7516-7525]

Cited: 1 time

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Real-time measurement of the crystal violet adsorption behavior and interaction process at the silica-aqueous interface by near-field evanescent wave.

Yan Xiong, Jie Chen, Ming Duan, Shenwen Fang,

The interfacial adsorption and interaction of crystal violet (CV) at the silica-water interface was real-time measured based on a total-internal-reflection-induced near-field evanescent wave (TIR-NFEW). A silica optical fiber (SOF) was employed as a charged substrate for CV adsorption and as a light transmission waveguide for evanescent wave production for the ... Read more >>

Phys Chem Chem Phys (Physical chemistry chemical physics : PCCP)
[2018, 20(28):19208-19220]

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Real-Time Monitoring of Azo Dye Interfacial Adsorption at Silica-Water Interface by Total Internal Reflection-Induced Surface Evanescent Wave.

Yan Xiong, Qing Wang, Ming Duan, Jun Tan, Shenwen Fang, Jiayi Wu,

An interface research method based on total internal reflection induced evanescent wave (TIR-EW) is developed to monitor the adsorption behavior of azo dye at the silica-water interface. The monitoring system is constructed by employing silica optical fiber (SOF) as both charged substrate for dye adsorption and light transmission waveguide for ... Read more >>

Langmuir (Langmuir : the ACS journal of surfaces and colloids)
[2018, 34(26):7612-7623]

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Optical sensor for fluoride determination in tea sample based on evanescent-wave interaction and fiber-optic integration.

Yan Xiong, Jiayi Wu, Qing Wang, Jing Xu, Shenwen Fang, Jie Chen, Ming Duan,

In this work, a miniaturized optical sensor was developed for fluoride determination in tea samples to evaluate their specific risks of fluorosis for public health based on evanescent-wave interaction. The sensor design was integrated on the optical fiber by utilizing the evanescent wave produced on the fiber surface to react ... Read more >>

Talanta (Talanta)
[2017, 174:372-379]

Cited: 3 times

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A LED-based fiber-optic sensor integrated with lab-on-valve manifold for colorimetric determination of free chlorine in water.

Yan Xiong, Jun Tan, Shenwen Fang, Chengjie Wang, Qing Wang, Jiayi Wu, Jie Chen, Ming Duan,

In this work, a colorimetric methodology was developed for free chlorine determination by constructing a fiber-optic sensor (FOS) which was designed by using a small LED as light source and two silica fibers as light transmission elements. Then the FOS was integrated with the sequential injection lab-on-valve (SI-LOV) manifold to ... Read more >>

Talanta (Talanta)
[2017, 167:103-110]

Cited: 1 time

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Real-time monitoring the adsorption of sodium dodecyl sulfate on a hydrophobic surface using dual polarization interferometry.

Ming Duan, Hu Wang, Shenwen Fang, Ying Liang,

The adsorption process of sodium dodecyl sulfate (SDS) at a hydrophobic layer was investigated by dual polarization interferometry (DPI), which provided the real-time information at solid/liquid interface. In dilute solution, the molecules adsorb at the surface as isotropic layer. With the increase in concentration, the molecules aggregate to form hemimicelles ... Read more >>

J Colloid Interface Sci (Journal of colloid and interface science)
[2014, 417:285-292]

Cited: 3 times

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