Facile and large-scale synthesis of poly(m-phenylenediamine) nanobelts with high surface area and superior dye adsorption ability

The development of excellent drug adsorbents and clarifying the interaction mechanisms between adsorbents and adsorbates are greatly desired for a clean environment. Herein, we report that a reduced graphene oxide modified sheeted polyphosphazene (rGO/poly (cyclotriphosphazene-co-4,4′-sulfonyldiphenol)) defined as PZS on rGO was used to remove the tetracycline (TC) drug from an aqueous solution. Compared to PZS microspheres, the adsorption capacity of sheeted PZS@rGO exhibited a high adsorption capacity of 496 mg/g. The adsorption equilibrium data well obeyed the Langmuir isotherm model, and the kinetics isotherm was fitted to the pseudo-second-order model. Thermodynamic analysis showed that the adsorption of TC was an exothermic, spontaneous process. Furthermore, we highlighted the importance of the surface modification of PZS by the introduction of rGO, which tremendously increased the surface area necessary for high adsorption. Along with high surface area, electrostatic attractions, H-bonding, π-π stacking and Lewis acid-base interactions were involved in the high adsorption capacity of PZS@rGO. Furthermore, we also proposed the mechanism of TC adsorption via PZS@rGO.

Download Full-text

Microporous activated carbon developed from KOH activated biomass waste: surface mechanistic study of methylene blue dye adsorption

Water Science & Technology ◽

10.2166/wst.2021.355 ◽

2021 ◽

Author(s):

Ali H. Jawad ◽

Ahmed Saud Abdulhameed ◽

Noor Nazihah Bahrudin ◽

Nurul Nadiah Mohd Firdaus Hum ◽

S. N. Surip ◽

...

Keyword(s):

Methylene Blue ◽

Activated Carbon ◽

Surface Area ◽

Sugarcane Bagasse ◽

High Surface ◽

High Surface Area ◽

Dye Adsorption ◽

Type I ◽

Order Kinetic ◽

Bagasse Waste

Abstract In this work, sugarcane bagasse waste (SBW) was used as a lignocellulosic precursor to develop a high surface area activated carbon (AC) by thermal treatment of the SBW impregnated with KOH. This sugarcane bagasse waste activated carbon (SBWAC) was characterized by means of crystallinity, porosity, surface morphology and functional groups availability. The SBWAC exhibited Type I isotherm which corresponds to microporosity with high specific surface area of 709.3 m2/g and 6.6 nm of mean pore diameter. Further application of SBWAC as an adsorbent for methylene blue (MB) dye removal demonstrated that the adsorption process closely followed the pseudo-second order kinetic and Freundlich isotherm models. On the other hand, thermodynamic study revealed the endothermic nature and spontaneity of MB dye adsorption on SBWAC with high acquired adsorption capacity (136.5 mg/g). The MB dye adsorption onto SBWAC possibly involved electrostatic interaction, H-bonding and π-π interaction. This work demonstrates SBW as a potential lignocellulosic precursor to produce high surface area AC that can potentially remove more cationic dyes from the aqueous environment.

Download Full-text

Construction and carbon dioxide capture of microporous polymer networks with high surface area based on cross-linkable linear polyimides

Polymer Chemistry ◽

10.1039/c9py00100j ◽

2019 ◽

Vol 10 (33) ◽

pp. 4611-4620 ◽

Cited By ~ 6

Author(s):

Ningning Song ◽

Tianjiao Wang ◽

Hongyan Yao ◽

Tengning Ma ◽

Kaixiang Shi ◽

...

Keyword(s):

Carbon Dioxide ◽

Surface Area ◽

Carbon Dioxide Capture ◽

High Surface ◽

Polymer Networks ◽

High Surface Area ◽

Crosslinking Reaction ◽

Adsorption Performance ◽

Microporous Polymer

Microporous polyimide networks with high surface area and excellent CO2 adsorption performance have been constructed based on cross-linkable linear polyimides through crosslinking reaction.

Download Full-text

Large-scale and facile synthesis of a porous high-entropy alloy CrMnFeCoNi as an efficient catalyst

Journal of Materials Chemistry A ◽

10.1039/d0ta04940a ◽

2020 ◽

Vol 8 (35) ◽

pp. 18318-18326 ◽

Cited By ~ 1

Author(s):

Hailong Peng ◽

Yangcenzi Xie ◽

Zicheng Xie ◽

Yunfeng Wu ◽

Wenkun Zhu ◽

...

Keyword(s):

Catalytic Activity ◽

Surface Area ◽

Large Scale ◽

High Surface ◽

High Surface Area ◽

Catalytic Performance ◽

High Entropy Alloy ◽

Facile Synthesis ◽

Efficient Catalyst ◽

High Entropy

Porous high entropy alloy CrMnFeCoNi exhibited remarkable catalytic activity and stability toward p-nitrophenol hydrogenation. The enhanced catalytic performance not only resulted from the high surface area, but also from exposed high-index facets with terraces.

Download Full-text

Cellulose generated-microporous carbon nanosheets with nitrogen doping

RSC Advances ◽

10.1039/c3ra47946c ◽

2014 ◽

Vol 4 (18) ◽

pp. 9126-9132 ◽

Cited By ~ 23

Author(s):

Wenzhong Shen ◽

Tuoping Hu ◽

Weibin Fan

Keyword(s):

Surface Area ◽

Porous Carbon ◽

Pore Volume ◽

Nitrogen Doping ◽

High Surface ◽

High Surface Area ◽

Structural Features ◽

Carbon Nanosheets ◽

Nitrogen Doped ◽

Adsorption Performance

Nanosheet porous carbon with high surface area and pore volume, unique compositional and structural features endow the nitrogen-doped porous carbon nanosheets with superior CO2 adsorption performance.

Download Full-text

A Comparative Study of the Activity of TiO2 Degussa P25 and Millennium PCs in the Photocatalytic Degradation of Bromothymol Blue

International Journal of Chemical Reactor Engineering ◽

10.1515/ijcre-2017-0014 ◽

2017 ◽

Vol 16 (4) ◽

Cited By ~ 2

Author(s):

Nour Bouanimba ◽

Nassima Laid ◽

Razika Zouaghi ◽

Tahar Sehili

Keyword(s):

Photocatalytic Degradation ◽

Surface Area ◽

High Surface ◽

High Surface Area ◽

Dye Adsorption ◽

Bromothymol Blue ◽

Average Crystalline Size ◽

Photocatalytic Activities ◽

Degussa P25 ◽

The Relationship

Abstract The photocatalytic activities of TiO2 Degussa P25 and Millennium PCs (PC50, PC100, PC105 and PC500) were evaluated by the photocatalytic degradation of Bromothymol Blue (BTB). The relationship between the photocatalytic reaction and the adsorption of BTB on the TiO2 catalysts at acidic, natural and basic mediums of pH was investigated. The crystalline phase, average crystalline size and surface area of the catalyst were found to have a significant influence on the adsorption and photocatalytic activity of the TiO2 samples. The mixed phase of anatase/rutile (Degussa P25) was found to be the most efficient photocatalytical material than pure phase anatase (Millennium PCs) and faster degradation is observed for PC500 compared to other Millennium PCs, this was attributed to the high surface area of PC500. Within the PC50, PC100 and PC105 series, the photocatalytic efficiency increased with the decrease of the surface area. The COD and TOC removals increased slowly, however, the decolorization ratio of BTB increased rapidly at the same time. Thereafter, the efficiency of P25 and PC500 were compared in presence of H2O2, Cl− and HCO3− at different mediums of pH. H2O2 was found to enhance strongly the BTB degradation in presence of P25 with an optimum at natural pH. In contrast, the reaction was inhibited in the presence of PC500, due to the inhibition of dye adsorption. At different pH, the BTB degradation has been significantly inhibited in the presence of the mixtures of HCO3−/H2O2. In contrast, the mixtures of Cl−/H2O2 accelerate the BTB degradation at acidic pH.

Download Full-text

Bifunctional Materials for CO₂ Adsorption: Short Review

Journal of Chemical Engineering and Industrial Biotechnology ◽

10.15282/jceib.v7i2.7021 ◽

2021 ◽

Vol 7 (2) ◽

pp. 15-19

Author(s):

S. M. Yusof ◽

L. P. Teh

Keyword(s):

Surface Area ◽

Active Sites ◽

Co2 Adsorption ◽

High Surface ◽

Co Adsorption ◽

High Surface Area ◽

Short Review ◽

High Dispersion ◽

High Porosity ◽

Adsorption Performance

In recent years, there has been growing interest in adsorbents with high surface area, high porosity, high stability and high selectivity for CO2 adsorption. By the incorporation of the additive on the supports such as zeolite, silica, and carbon, the physicochemical properties of the adsorbent and CO2 adsorption performance can be enhanced. In this review, we focus on the overview of bifunctional materials (BFMs) for CO2 adsorption. The findings of this study suggests that the high surface area and high porosity of the support provide a good medium for high dispersion and accessibility of additives (amine or metal oxide), enhancing the CO2 adsorption efficiency. The excessive additive however may lead to a decrease of CO2 adsorption performance due to pore blockage and the decrease of active sites for CO2 interactions. The synergistic relationship of the supporting material and additive is significant towards the enhancement of CO2 adsorption.

Download Full-text