Carbonized Enteromorpha prolifera with porous architecture and its polyaniline composites as high-performance electrode materials for supercapacitors

Du, Wei; Wang, Xiaoning; Ju, Xiangyu; Xu, Ke; Gao, Mingzhong; Zhang, Xintao

doi:10.1016/j.jelechem.2017.08.044

Cited by 28 publications

(7 citation statements)

References 46 publications

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“…Thus, it can be a suitable carbonaceous precursor for producing biochar. Recent studies showed that EP was a promising precursor for the synthesis of heteroatom-doped biochars [9] and EP biochar can be used for CO 2 adsorption and the preparation of electrode materials [10,11]. Unfortunately, few studies focus on EP biochar when used as an adsorbent for the removal of organic pollutants in water and few works have mentioned the mechanism of formation of EP biochar during the heating process.…”

Section: Introductionmentioning

confidence: 99%

‘Green Tide’ to Biochar: Preparation and Adsorption Isotherms for Three Typical Organic Pollutants

Ma¹,

Wang²,

Zhang³

2018

Progress in Reaction Kinetics and Mechanism

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Enteromorpha prolifera (EP), the main source contributing to the outbreak of 'green tide', was used as the raw material to prepare biochars by pyrolysis. The biochars were analysed using N 2-adsorption and Fourier transform infrared (FTIR) spectroscopy. The pyrolysis process was investigated by thermogravimetric analysis coupled with FTIR. The adsorption capacities of the biochars were compared in terms of removal efficiencies of methylene blue (MB), oxytetracycline (OTC) and humic acid (HA). The adsorption isotherms of the three organics by the optimum biochar were investigated. The results showed that the Brunauer-Emmett-Teller surface area of the biochar increased from 36 to 643 m 2 g-1 with increasing pyrolysis temperature. The surface functional groups contained in EP were damaged during pyrolysis, while-N=O, S=O and C=N groups were formed on the biochar surface. Decomposition of EP resulted in the vigorous release of gaseous products at 240 °C, including CO 2 , H 2 O, aldehydes, ethers, aliphatic amines, sulfones and alcohols. CO 2 was released due to the decomposition of carbonates above 700 °C and the in situ reduction of CO 2 by carbon contained in the biochar was responsible for the high surface area of the biochar prepared at 750 °C (EPC750). EPC750 had the highest adsorption capacities for MB, OTC and HA among the biochars. The adsorption equilibrium data for MB and OTC onto EPC750 followed the Langmuir model with monolayer adsorption capacities of 138.89 and 103.31 mg g-1 respectively. The adsorption data for OTC also exhibited good agreement with the Freundlich model, suggesting the adsorption process was controlled by multiple mechanisms. The adsorption of HA by EPC750 followed the Freundlich model and the maximum adsorption capacity reached 64.27 mg g-1 under the experimental conditions.

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Section: Introductionmentioning

confidence: 99%

‘Green Tide’ to Biochar: Preparation and Adsorption Isotherms for Three Typical Organic Pollutants

Ma¹,

Wang²,

Zhang³

2018

Progress in Reaction Kinetics and Mechanism

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“…The chemical structures of the different samples were investigated using FTIR and Raman spectra, respectively, as shown in Figure 4. The absorption broad peaks present in all three curves in Figure 4a at 3400 cm −1 can be attributed to the H–O–H bending of the absorbed H 2 O molecules, and the narrow peaks at 675 and 2369 cm −1 can be ascribed to the P–C and P–H stretching vibrations, respectively [20]. The FTIR spectrum of RP-7.5 indicates that PANI has a high-intensity vibration peak in the range of 500–1350 cm −1 , confirming the high content of functional groups in PANI.…”

Section: Resultsmentioning

confidence: 99%

Recycled Carbon Fiber-Supported Polyaniline/Manganese Dioxide Prepared via One-Step Electrodeposition for Flexible Supercapacitor Integrated Electrodes

Wang

Wei

et al. 2018

Polymers

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The exploration of multifunctional electrode materials has been a hotspot for the development of high-performance supercapacitors. We have used carbon fiber plates recovered from construction waste to prepare high-quality flexible carbon fiber materials by pyrolysis of epoxy resin. The as-prepared recycled carbon fiber has a diameter of 8 μm and is the perfect substrate material for flexible electrode materials. Furthermore, polyaniline and manganese dioxide are uniformly deposited on the recycled carbon fiber by one-step electrodeposition to form an active film. The recycled carbon fiber/polyaniline/MnO2 composite shows an excellent specific capacitance of 475.1 F·g−1 and capacitance retention of 86.1% after 5000 GCD cycles at 1 A·g−1 in 1 M Na2SO4 electrolyte. The composites optimized for electrodeposition time have more electroactive sites, faster ions and electron transfer, structural stability and higher conductivity, endowing the composites promising application prospect.

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“…To date, literatures have demonstrated that composite materials based on PANI and AC can provide a synergistic combination of high porosity from carbon and high pseudo capacitance from PANI [26,27,28,29,30,31,32,33,34,35]. Inevitably, the interface resistance in nanostructures is a bottleneck in the development of conductive polymer materials [36].…”

Section: Properties and Applications Of Carbon/polyaniline Hybridsmentioning

confidence: 99%

Review on Carbon/Polyaniline Hybrids: Design and Synthesis for Supercapacitor

et al. 2019

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Polyaniline has been widely used in high-performance pseudocapacitors, due to its low cost, easy synthesis, and high theoretical specific capacitance. However, the poor mechanical properties of polyaniline restrict its further development. Compared with polyaniline, functionalized carbon materials have excellent physical and chemical properties, such as porous structures, excellent specific surface area, good conductivity, and accessibility to active sites. However, it should not be neglected that the specific capacity of carbon materials is usually unsatisfactory. There is an effective strategy to combine carbon materials with polyaniline by a hybridization approach to achieve a positive synergistic effect. After that, the energy storage performance of carbon/polyaniline hybridization material has been significantly improved, making it a promising and important electrode material for supercapacitors. To date, significant progress has been made in the synthesis of various carbon/polyaniline binary composite electrode materials. In this review, the corresponding properties and applications of polyaniline and carbon hybrid materials in the energy storage field are briefly reviewed. According to the classification of different types of functionalized carbon materials, this article focuses on the recent progress in carbon/polyaniline hybrid materials, and further analyzes their corresponding properties to provide guidance for the design, synthesis, and component optimization for high-performance supercapacitors.

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Carbonized Enteromorpha prolifera with porous architecture and its polyaniline composites as high-performance electrode materials for supercapacitors

Cited by 28 publications

References 46 publications

‘Green Tide’ to Biochar: Preparation and Adsorption Isotherms for Three Typical Organic Pollutants

‘Green Tide’ to Biochar: Preparation and Adsorption Isotherms for Three Typical Organic Pollutants

Recycled Carbon Fiber-Supported Polyaniline/Manganese Dioxide Prepared via One-Step Electrodeposition for Flexible Supercapacitor Integrated Electrodes

Review on Carbon/Polyaniline Hybrids: Design and Synthesis for Supercapacitor

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