Preparation of well-developed mesoporous activated carbon fibers from plant pulp fibers and its adsorption of methylene blue from solution

Liu, B.; Du, Chao; Chen, Junjun; Zhai, Jinxia; Wang, Y.; Li, H.L.

doi:10.1016/j.cplett.2021.138535

Cited by 29 publications

(8 citation statements)

References 43 publications

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“…that the carbon fibers have an amorphous structure [28,29], an sponding carbon diffraction peaks in the XRD energy spec CF/SrTiO3 materials were not obvious. The pure CdS sample h peaks at 24.8°, 26.4°, 28.1°, 43.9°, 47.9°, and 52.0°, respectively be (101), ( 110), (103), and (112) crystal faces in accordance with PD observed from the XRD energy spectrum of the CF/SrTiO3/CdS not only characteristic diffraction peaks attributed to SrTiO3, but peaks at 26.4°, 43.9°, and 52.1°, which could be attributed to Cd tion peaks (PDF#41-1049) [30].…”

Section: Experimental Results and Analysismentioning

confidence: 92%

“…Compared with the characteristic diffraction peak energy spectrum of the pure SrTiO 3 sample, the shapes and positions of distinctive characteristic diffraction peaks in the XRD energy spectra of the CF/SrTiO 3 and CF/SrTiO 3 /CdS samples were similar to those of the pure SrTiO 3 , indicating that SrTiO 3 was coated smoothly on these carbon fibers. The XRD energy spectrum of CF formed by carbonization of bamboo pulp fibers showed only one broad carbon diffraction peak, indicating that the carbon fibers have an amorphous structure [28,29], and therefore the corresponding carbon diffraction Coatings 2022, 12, 1235 5 of 17 peaks in the XRD energy spectra of CF/SrTiO 3 and CF/SrTiO 3 materials were not obvious. The pure CdS sample had obvious diffraction peaks at 24.8 • , 26.4 • , 28.1 • , 43.9 • , 47.9 • , and 52.0 • , respectively belonging to (100), (002), (101), (110), (103), and (112) crystal faces in accordance with PDF#41-1049.…”

Section: Experimental Results and Analysismentioning

confidence: 99%

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One-Dimensional CdS/SrTiO3/Carbon Fiber Core–Shell Photocatalysts for Enhanced Photocatalytic Hydrogen Evolution

Niu

Zhang

et al. 2022

Coatings

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The photocatalytic hydrogen production efficiency of a single SrTiO3 photocatalytic catalyst is often low, which is mainly due to the serious combination of electrons and holes produced by photocatalysis as well as the mismatch of the redox capacity and light absorption range. Construction of semiconductor heterojunctions can solve these problems. CdS has a narrow band gap, which can effectively utilize visible light, and it has a band structure matched with that of SrTiO3. Therefore, CdS is considered as an ideal candidate for constructing heterojunctions with SrTiO3. In this paper, bamboo pulp fibers were used as the substrate, and SrTiO3 was coated on the substrate through the solvothermal process. CF/SrTiO3 rich in oxygen vacancies was formed by high temperature carbonization, and heterojunctions were formed by loading CdS on the surface of the CF/SrTiO3 composite material through the hydrothermal method, thus obtaining one-dimensional CF/SrTiO3/CdS core–shell photocatalysts. The structure and photocatalytic hydrogen production performance of the CF/SrTiO3/CdS core–shell photocatalysts were mainly studied. The photocatalytic hydrogen production experiment showed that the hydrogen production rate of the CF/SrTiO3/CdS-2 sample under the optimized process was as high as 577.39 μmol/g·h, which was about 11 times that of the CF/SrTiO3 sample. In this composite photocatalytic material system, the loading of the CdS nanospheres could enhance the visible light absorption capacity of the composite catalyst, promote the rapid separation and high-speed migration of photocarriers, and significantly improve the photocatalytic activity.

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Section: Experimental Results and Analysismentioning

confidence: 92%

Section: Experimental Results and Analysismentioning

confidence: 99%

One-Dimensional CdS/SrTiO3/Carbon Fiber Core–Shell Photocatalysts for Enhanced Photocatalytic Hydrogen Evolution

Niu

Zhang

et al. 2022

Coatings

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“…Kinetic models are important to evaluate the adsorption kinetics and to examine the adsorption efficiency [ 43 ]. The pseudo-first-order kinetic model (PFOKM) and pseudo-second-order kinetic model (PSOKM) were used to describe the sorption kinetics, which are expressed as following equations [ 46 ]:

where Q t (mg g −1 ) is the amount of absorption at time t (h), Q e (mg g −1 ) represents the amount of absorption at equilibrium, k 1 (h −1 ) and k 2 (mg −1 g −1 h −1 ) are the adsorption rate constants for PFOKM and PSOKM, and t is adsorption time (h), respectively.…”

Section: Resultsmentioning

confidence: 99%

“…In general, the adsorption of dyes is controlled by the liquid-phase mass transfer rate or the intra-particle mass transfer rate [ 48 ]. The adsorbent component may be introduced from the solution into the solid phase by an intra-particle diffusion process, which is the rate-limiting step in many adsorption processes [ 43 ].…”

Section: Resultsmentioning

confidence: 99%

Preparation of Reusable Porous Carbon Nanofibers from Oxidized Coal Liquefaction Residue for Efficient Adsorption in Water Treatment

et al. 2023

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Porous carbon nanofibers are commonly used for adsorption processes owing to their high specific surface area and rich pore structure. However, the poor mechanical properties of polyacrylonitrile (PAN)-based porous carbon nanofibers have limited their applications. Herein, we introduced solid waste-derived oxidized coal liquefaction residue (OCLR) into PAN-based nanofibers to obtain activated reinforced porous carbon nanofibers (ARCNF) with enhanced mechanical properties and regeneration for efficient adsorption of organic dyes in wastewater. This study examined the effects of contact time, concentration, temperature, pH, and salinity on the adsorption capacity. The adsorption processes of the dyes in ARCNF are appropriately described by the pseudo-second-order kinetic model. The maximum adsorption capacity for malachite green (MG) on ARCNF is 2712.84 mg g−1 according to the fitted parameters of the Langmuir model. Adsorption thermodynamics indicated that the adsorptions of the five dyes are spontaneous and endothermic processes. In addition, ARCNF have good regenerative performance, and the adsorption capacity of MG is still higher than 76% after 5 adsorption-desorption cycles. Our prepared ARCNF can efficiently adsorb organic dyes in wastewater, reducing the pollution to the environment and providing a new idea for solid waste recycling and water treatment.

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“…The common methods of surface modification of ACF include oxidation and nitridation. 12,17–19 After oxidation treatment, the surface of ACF can generate functional groups, such as a carboxyl group, phosphoric acid, and hydroxyl group. Nitrogen-containing groups, such as amino groups and amides, will be generated on the surface of ACF after nitridation.…”

Section: Introductionmentioning

confidence: 99%

Activated carbon fiber modified with hyperbranched polyethylenimine and phytic acid for the effective adsorption and separation of In(iii)

Gao

Cao

et al. 2022

New J. Chem.

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Preparation of well-developed mesoporous activated carbon fibers from plant pulp fibers and its adsorption of methylene blue from solution

Cited by 29 publications

References 43 publications

One-Dimensional CdS/SrTiO3/Carbon Fiber Core–Shell Photocatalysts for Enhanced Photocatalytic Hydrogen Evolution

One-Dimensional CdS/SrTiO3/Carbon Fiber Core–Shell Photocatalysts for Enhanced Photocatalytic Hydrogen Evolution

Preparation of Reusable Porous Carbon Nanofibers from Oxidized Coal Liquefaction Residue for Efficient Adsorption in Water Treatment

Activated carbon fiber modified with hyperbranched polyethylenimine and phytic acid for the effective adsorption and separation of In(iii)

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