scholarly journals Nitrogen-doped graphene-like carbon material derived via a simple, cost-effective method as an excellent adsorbent for methylene blue adsorption

2020 ◽  
Vol 194 ◽  
pp. 04036
Author(s):  
Bin Ren ◽  
Junfeng Miao ◽  
Shasha Wang ◽  
Yuelong Xu ◽  
Zuozhao Zhai ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Carbon Materials ◽  
Chemical Properties ◽  
Cost Effective ◽  
Polyvinyl Pyrrolidone ◽  
Maximum Adsorption Capacity ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Nitrogen-enriched graphene-like carbon materials were successfully prepared via pyrolysis of a mixture of melamine, ammonia chloride (NH4Cl) and polyvinyl pyrrolidone (PVP) at a mild temperature without inert gas protection. Different techniques were used to analyze the physical and chemical properties of the products. All the prepared materials showed excellent performance in methylene blue (MB) adsorption, In particular, the materials prepared with 3 g polyvinyl pyrrolidone (PVP) (NCG-2) exhibited the best performance, a very high maximum adsorption capacity of 348.2 mg/g, much larger than many reported materials. The high adsorption capacity of the Nitrogen-doped graphene-like carbon materials was possible due to its uniform porous structure, high specific surface area. Moreover, NCG-2 could be recycled and only a only slightly decreased in the removal efficiency were observed after 5 cycles.

scholarly journals Poly (N-vinyl Imidazole)/Nitrogen-Doped Graphene Quantum Dot Hydrogel Adsorbent With Remarkable Capability for Metal Ion Removal From Aqueous Systems

2021 ◽  
Author(s):  
Solmaz Massoudi ◽  
Massoumeh Bagheri ◽  
Maryam Hosseini
Keyword(s):  
Adsorption Capacity ◽  
Contact Time ◽  
Metal Ion ◽  
Graphene Quantum Dots ◽  
Molar Ratio ◽  
Isotherm Models ◽  
Maximum Adsorption Capacity ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Abstract The present work studies the adsorptive removal of cadmium, nickel and chromium ions from an aqueous solution using a highly efficient nanocomposite adsorbent hydrogel. pH-sensitive nanocomposite hydrogels prepared easily by the free radical polymerization of N‑vinyl imidazole (VI) monomer using N, N′- methylene-bis-acrylamide (MBA) and dicationic imidazolium-based (DIL) cross-linkers with molar ratios of monomer/cross-linker in the presence of 0.0, 0.9 and 4.0 wt.% nitrogen doped graphene quantum dots (NGQD). The prepared hydrogel (PVI/NGQD) with higher swelling degree (V-D-G1) with molar ratio of VI/DIL=24 and 4.0 wt.% NGQD was a prominent candidate for adsorption study of three elements (Cd, Ni, and Cr) from the solution. FT-IR, DSC, XRD, SEM, and EDS analysis were used to characterize the structure and the surface morphology of adsorbent before and after the metal ions adsorption. The effects of pH, initial concentration of ions and contact time on the adsorption capacity of the hydrogel were also studied. Adsorption of ions were investigated at pH 1.0, 7.0 and 9.0 and maximum removal efficiencies for Cd(II), Ni(II) and Cr(VI) ions (75%, 94.6% and 70.9%) were achieved at pH=7.0 and optimum ions concentration and contact time of 1000 mg/L, and 40, 40 and 150 min, respectively. The maximum adsorption capacity values of V-D-G1 is found to be 5000, 5000 and 370.370 mg/g for Cd(II), Ni(II) and Cr(VI), respectively. The adsorption data were used to study the adsorption kinetic and isotherm models in which Langmuir model and pseudo-first order model showed the better applicability.

A hierarchical 2D Ni–Mo–S nanosheet@nitrogen doped graphene hybrid as a Pt-free cathode for high-performance dye sensitized solar cells and fuel cells

2017 ◽  
Vol 5 (34) ◽  
pp. 17896-17908 ◽  
Author(s):  
Jayaraman Balamurugan ◽  
Shaik Gouse Peera ◽  
Meng Guo ◽  
Thanh Tuan Nguyen ◽  
Nam Hoon Kim ◽  
...  
Keyword(s):  
High Performance ◽  
Hydrothermal Process ◽  
Dye Sensitized Solar Cells ◽  
Cost Effective ◽  
Nitrogen Doped ◽  
Dye Sensitized ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Energy Conversion Devices ◽  
Sensitized Solar Cells

A novel hybrid of 2D Ni–Mo–S nanosheet integrated nitrogen doped graphene (NG) is successfully developed via a simple, scalable, and cost-effective hydrothermal process, and its application towards energy conversion devices is explored.

Templated synthesis of nitrogen-doped graphene-like carbon materials using spent montmorillonite

RSC Advances ◽  
2015 ◽  
Vol 5 (10) ◽  
pp. 7522-7528 ◽  
Author(s):  
Runliang Zhu ◽  
Qingze Chen ◽  
Xin Wang ◽  
Shuangyin Wang ◽  
Jianxi Zhu ◽  
...  
Keyword(s):  
Carbon Materials ◽  
Templated Synthesis ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

This work provided a method that can recycle the spent montmorillonite and synthesize heteroatom-doped graphene-like materials.

scholarly journals Core-Shell Structured Magnetic Carboxymethyl Cellulose-Based Hydrogel Nanosorbents for Effective Adsorption of Methylene Blue from Aqueous Solution

Polymers ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 3054
Author(s):  
Yiming Zhou ◽  
Te Li ◽  
Juanli Shen ◽  
Yu Meng ◽  
Shuhua Tong ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Carboxymethyl Cellulose ◽  
Chemical Properties ◽  
Polymer Nanocomposite ◽  
Core Shell ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Solution Ph

This article reports effective removal of methylene blue (MB) dyes from aqueous solutions using a novel magnetic polymer nanocomposite. The core-shell structured nanosorbents was fabricated via coating Fe3O4 nanoparticles with a layer of hydrogel material, that synthesized by carboxymethyl cellulose cross-linked with poly(acrylic acid-co-acrylamide). Some physico-chemical properties of the nanosorbents were characterized by various testing methods. The nanosorbent could be easily separated from aqueous solutions by an external magnetic field and the mass fraction of outer hydrogel shell was 20.3 wt%. The adsorption performance was investigated as the effects of solution pH, adsorbent content, initial dye concentration, and contact time. The maximum adsorption capacity was obtained at neutral pH of 7 with a sorbent dose of 1.5 g L−1. The experimental data of MB adsorption were fit to Langmuir isotherm model and Pseudo-second-order kinetic model with maximum adsorption of 34.3 mg g−1. XPS technique was applied to study the mechanism of adsorption, electrostatic attraction and physically adsorption may control the adsorption behavior of the composite nanosorbents. In addition, a good reusability of 83.5% MB recovering with adsorption capacity decreasing by 16.5% over five cycles of sorption/desorption was observed.

scholarly journals Nitrogen-doped graphene–TiOxNy nanocomposite electrode for highly efficient capacitive deionization

RSC Advances ◽  
2019 ◽  
Vol 9 (48) ◽  
pp. 28186-28193 ◽  
Author(s):  
Yuchen Wu ◽  
Gaopeng Jiang ◽  
Qian Li ◽  
Zisheng Zhang ◽  
Zhongwei Chen
Keyword(s):  
Adsorption Capacity ◽  
Capacitive Deionization ◽  
Nitrogen Doped ◽  
Highly Efficient ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

A nanocomposite electrode of nitrogen-doped graphene and titanium oxynitride is applied as an effective and efficient electrode to deliver outstanding salt adsorption capacity in a flow-by capacitive deionization (CDI) cell.

Nanosized Pt anchored onto 3D nitrogen-doped graphene nanoribbons towards efficient methanol electrooxidation

2015 ◽  
Vol 3 (39) ◽  
pp. 19696-19701 ◽  
Author(s):  
Huajie Huang ◽  
Gonglan Ye ◽  
Shubin Yang ◽  
Huilong Fei ◽  
Chandra Sekhar Tiwary ◽  
...  
Keyword(s):  
Graphene Nanoribbons ◽  
Cost Effective ◽  
Methanol Electrooxidation ◽  
Nitrogen Doped ◽  
Cost Effective Approach ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Nanosized Pt particles supported on 3D nitrogen-doped graphene nanoribbons were fabricated via a simple and cost-effective approach for efficient methanol electrooxidation.

scholarly journals Magnetic Nitrogen-doped graphene synthesized from orange peel as highly effective adsorbent for removal of sodium dodecyl benzenesulfonate (SDBS) from aqueous solutions

2021 ◽  
Author(s):  
Arash Khoshnoodfar ◽  
Nader Bahramifar ◽  
Habibollah Younesi
Keyword(s):  
Adsorption Process ◽  
Orange Peel ◽  
Bet Surface Area ◽  
Sodium Dodecylbenzene Sulfonate ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Nano Adsorbent

Abstract The purpose of the current research is to investigate the adsorption process behavior of magnetic nitrogen doped graphene (MNG) prepared from the orange peel in the adsorption of sodium dodecylbenzene sulfonate (SDBS) from liquid solution in batch experiments. The characteristics results of VSM, FTIR, SEM, AFM, Raman, elemental analysis and BET surface area analysis revealed the successful synthesis nano adsorbent. The effective factors on adsorption performance were including adsorbent dosage, temperature, contact time, pH and initial concentration of SDBS. The Maximum adsorption capacity for SDBS is computed to be 556 mg/g at 45 ◦C and pH of 3. The adsorption process of SDBS was found that fitted well with the Langmuir isotherm model and pseudo-second-order kinetic equations. Thermodynamic analysis proved the spontaneous and endothermic nature of the adsorption process. Furthermore, the SDBS can be desorbed from the fabricated nano adsorbent by methanol solution with 88 % desorption efficiency and MNG indicated good reusability after five cycles. The finding from this research, propose that the as-synthesized MNG could be an effective adsorbent for water and wastewater treatment because of its convenient process and magnetic separation.

Sign in / Sign up

Export Citation Format

Share Document