Chemically modified activated carbon decorated with MnO2 nanocomposites for improving lithium adsorption and recovery from aqueous media

Kamran, Urooj; Heo, Young-Jung; Lee, Ji Won

doi:10.1016/j.jallcom.2019.04.211

Cited by 58 publications

(17 citation statements)

References 36 publications

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“…In our previously published review paper, carbon-based thermoelectric materials were mainly introduced [31]. Carbon materials are usually non-toxic, light, and environmentally friendly, with excellent reinforcement ability [77,78,79,80,81,82,83,84,85,86,87,88,89,90]. This review gives more attention to summarizing inorganic particle-based organic thermoelectric materials that have been developed in recent years.…”

Section: Introductionmentioning

confidence: 99%

Flexible Organic Thermoelectric Materials and Devices for Wearable Green Energy Harvesting

Zhang

Park

2019

Polymers

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In the past few decades, organic thermoelectric materials/devices, which can exhibit remarkable potential in green energy conversion, have drawn great attention and interest due to their easy processing, light weight, intrinsically low thermal conductivity, and mechanical flexibility. Compared to traditional batteries, thermoelectric materials have high prospects as alternative power generators for harvesting green energy. Although crystalline inorganic semiconductors have dominated the fields of thermoelectric materials up to now, their practical applications are limited by their intrinsic fragility and high toxicity. The integration of organic polymers with inorganic nanoparticles has been widely employed to tailor the thermoelectric performance of polymers, which not only can combine the advantages of both components but also display interesting transport phenomena between organic polymers and inorganic nanoparticles. In this review, parameters affecting the thermoelectric properties of materials were briefly introduced. Some recently developed n-type and p-type thermoelectric films and related devices were illustrated along with their thermoelectric performance, methods of preparation, and future applications. This review will help beginners to quickly understand and master basic knowledge of thermoelectric materials, thus inspiring them to design and develop more efficient thermoelectric devices.

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Section: Introductionmentioning

confidence: 99%

Flexible Organic Thermoelectric Materials and Devices for Wearable Green Energy Harvesting

Zhang

Park

2019

Polymers

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“…Solid materials for adsorption-based CO 2 capture, such as amine-modified mesoporous adsorbents (Chen et al, 2013 ; Sim et al, 2015 ), silica (Belmabkhout et al, 2009 ), microporous carbon-based materials (Wickramaratne and Jaroniec, 2013 ; Kamran and Park, 2020 ), zeolites (Bae et al, 2013 ), inorganic-capillary membranes (Besser et al, 2016 ), porous hexagonal boron nitride (h-BN) sheets (Kamran et al, 2019a ), and nitrogen-doped carbon adsorbents (Heo and Park, 2015 ), are being investigated as promising alternatives because of their cost-effective preparation, broad availability, high specific surface area, controllable surface properties, physiochemical sustainability, and minimal energy utilization. Among these adsorbents, porous carbon sorbents, commonly referred to as activated carbons, have demonstrated several advantages and are considered efficient adsorbents for gas uptake, metal recovery, and catalysis (Lee et al, 2006 ; Liang et al, 2014 ; Kamran et al, 2019b ), because of their high adsorptive capacity, economical processing, easy regeneration, high thermal sustainability, rapid adsorption kinetics, high specific surface area, adjustable porosity, and functionality and low sensitivity to moisture (Zhou et al, 2013 ). In particular, the extent of porosity induction depends on several factors, including the nature of the precursor, the activation methodology and the activation conditions.…”

Section: Introductionmentioning

confidence: 99%

A Role of Activators for Efficient CO2 Affinity on Polyacrylonitrile-Based Porous Carbon Materials

2020

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Herein, we investigated polyacrylonitrile (PAN)-based porous activated carbon sorbents as an efficient candidate for CO 2 capture. In this research, an easy and an economical method of chemical activation and carbonization was used to generate activated PAN precursor (PAN-C) adsorbents. The influence of various activators including NaOH, KOH, K 2 CO 3 , and KNO 3 on the textural features of PAN-C and their CO 2 adsorption performance under different temperatures was examined. Among the investigated adsorbents, PANC-NaOH and PANC-KOH exhibited high specific surface areas (2,012 and 3,072 m 2 g −1), with high microporosity (0.82 and 1.15 cm 3 g −1) and large amounts of carbon and nitrogen moieties. The PAN-C activated with NaOH and KOH showed maximum CO 2 uptakes of 257 and 246 mg g −1 at 273 K and 163 and 155 mg g −1 at 298 K, 1 bar, respectively, which was much higher as compared to the inactivated PAN-C precursor (8.9 mg g −1 at 273 K and 1 bar). The heat of adsorption (Q st) was in the range 10.81-39.26 kJ mol −1 , indicating the physisorption nature of the CO 2 adsorption process. The PAN-C-based activated adsorbents demonstrated good regeneration ability over repeated adsorption cycles. The current study offers a facile two-step fabrication method to generate efficient activated porous carbon materials from inexpensive and readily available PAN for use as CO 2 adsorbents in environmental applications.

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“…The interest in applications of nanostructured sorbents for lithium extraction is attributed to its high surface area and high adsorption capacity (Du et al, 2016;Kamran et al, 2019;Luo et al, 2016). However, relatively poor stability has been achieved.…”

Section: Introductionmentioning

confidence: 99%

Extraction of Lithium from Single-Crystalline Lithium Manganese Oxide Nanotubes Using Ammonium Peroxodisulfate

et al. 2020

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In this work, a spinel single-crystalline Li 1.1 Mn 1.9 O 4 has been successfully synthesized using b-MnO 2 nanotubes as the self-sacrifice template. The tubular morphology was retained through solid-state reactions, attributed to a minimal structural reorganization from tetragonal b-MnO 2 to spinel Li 1.1 Mn 1.9 O 4. The materials were investigated as sorbents for lithium recovery from LiCl solutions, recycled using H 2 SO 4 and (NH 4) 2 S 2 O 8. Li 1.1 Mn 1.9 O 4 nanotubes exhibited favorable lithium extraction behavior due to tubular nanostructure, single-crystalline nature, and high crystallinity. (NH 4) 2 S 2 O 8 eluent ensures the structural stability of Li 1.1 Mn 1.9 O 4 nanotube, registering a Li + adsorption capacity of 39.21 mg g À1 ($89.73% of the theoretical capacity) with only 0.08% manganese dissolution after eight adsorption/desorption cycles, compared to that of 1.21% for H 2 SO 4. It reveals the degradation of sorbent involves with the volume change, Mn reduction, and Li/Mn ratio depletion. New strategies, based on nanotube adsorbent and (NH 4) 2 S 2 O 8 eluent, can extract lithium ions at satisfactorily high degrees while effectively minimizing manganese dissolution.

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Chemically modified activated carbon decorated with MnO2 nanocomposites for improving lithium adsorption and recovery from aqueous media

Cited by 58 publications

References 36 publications

Flexible Organic Thermoelectric Materials and Devices for Wearable Green Energy Harvesting

Flexible Organic Thermoelectric Materials and Devices for Wearable Green Energy Harvesting

A Role of Activators for Efficient CO2 Affinity on Polyacrylonitrile-Based Porous Carbon Materials

Extraction of Lithium from Single-Crystalline Lithium Manganese Oxide Nanotubes Using Ammonium Peroxodisulfate

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