Novel 2D Nanomaterial Composites Photocatalysts: Application in Degradation of Water Contaminants

Tanweer, Mohd Saquib; Alam, Mahabubul

doi:10.1007/978-981-16-8538-5_4

Cited by 8 publications

(4 citation statements)

References 94 publications

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“…Debye−Scherrer's equation 37 = p 0.9 cos (1) where p = mean particle size, β = FWHM, and θ = Bragg angle.…”

Section: Synthesis Of Rgcfmentioning

confidence: 99%

“…The introduction of dyes, heavy metals, pharmaceutical drugs, and other pollutants into water bodies has been a global concern. There is a coexistence of heavy metals and dyes found often in wastewater streams that forms an important and toxic combination. , The surfaces of fabrics, papers, cosmetics, leather, and so forth are attached to the chemical compounds that impart color to them known as dyes. Dyes play an important role in human life.…”

Section: Introductionmentioning

confidence: 99%

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Reduced Graphene Oxide-Modified Spinel Cobalt Ferrite Nanocomposite: Synthesis, Characterization, and Its Superior Adsorption Performance for Dyes and Heavy Metals

Tanweer

Alam

2023

ACS Omega

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This work is dedicated to the synthesis, characterization, and adsorption performance of reduced graphene oxide-modified spinel cobalt ferrite nanoparticles. The as-synthesized reduced graphene oxide cobalt ferrite (RGCF) nanocomposite has been characterized using FTIR spectroscopy, FESEM coupled with EDXS, XRD, HRTEM, zeta potential, and vibrating sample magnetometer (VSM) measurements. FESEM proves the particle size in the range of 10 nm. FESEM, EDX, TEM, FTIR, and XPS analyses provide the proof of successful incorporation of rGO sheets with cobalt ferrite nanoparticles. The crystallinity and spinel phase of cobalt ferrite nanoparticles have been shown by XRD results. The saturation magnetization (M s ) was measured as 23.62 emu/g, proving the superparamagnetic behavior of RGCF. The adsorption abilities of the synthesized nanocomposite have been tested using cationic crystal violet (CV) and brilliant green (BG) and anionic methyl orange (MO) and Congo red (CR) dyes. The adsorption trend for MO, CR, BG, and As(V) follows RGCF > rGO > CF at neutral pH. Adsorption studies have been accomplished by optimizing parameters like pH (2−8), adsorbent dose (1−3 mg/25 mL), initial concentration (10−200 mg/L), and contact time at constant room temperature (RT). To further investigate the sorption behavior, isotherm, kinetics, and thermodynamic studies have been conducted. Langmuir isotherm and pseudo-secondorder kinetic models suited better for the adsorption of dyes and heavy metals. The maximum adsorption capacities (q m ) obtained have been found as 1666.7, 1000, 416.6, and 222.2 mg/g for MO, CR, BG, and As, respectively, with operational parameters such as T = 298.15 K; RGCF dose: 1 mg for MO and 1.5 mg each for CR, BG, and As. Thus, the RGCF nanocomposite was found to be an excellent adsorbent for the removal of dyes and heavy metals.

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“…Debye−Scherrer's equation 37 = p 0.9 cos (1) where p = mean particle size, β = FWHM, and θ = Bragg angle.…”

Section: Synthesis Of Rgcfmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reduced Graphene Oxide-Modified Spinel Cobalt Ferrite Nanocomposite: Synthesis, Characterization, and Its Superior Adsorption Performance for Dyes and Heavy Metals

Tanweer

Alam

2023

ACS Omega

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“…Thus, the untreated dyes draining into the water source jeopardize ecotoxicological effects . Dyes also have ill effects on human health, including respiratory problems, skin irritation, itchy and watery eyes, and cancer. − Azo dyes (containing NN), such as methyl orange (MO) and Congo red (CR), are the most widely used dyes that show poor sunlight penetration in water, reducing the photosynthetic process. Even a trace content of MO and CR dyes shows high visibility and inhibit oxygen content in water .…”

Section: Introductionmentioning

confidence: 99%

Experimental Insights into Mesoporous Polyaniline-Based Nanocomposites for Anionic and Cationic Dye Removal

Tanweer

Alam

2022

Langmuir

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This work presents the preparation of inorganic–organic hybrid nanocomposites, namely three-dimensional polyaniline (Pani)/activated silica gel (ASG) (3D Pani@ASG), their characterization, and in removing application as a potential adsorbent for cationic brilliant green (BG), crystal violet (CV), and anionic Congo red (CR), and methyl orange (MO) dyes. Pani@ASG nanocomposites have been prepared by the in situ polymerization method and characterized using various techniques such as Fourier transform infrared (FTIR), X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) with selected area electron diffraction, thermogravimetric analysis with derivative thermogravimetry, zeta potential analyses, and Brunauer–Emmett–Teller (BET). The scanning electron microscopy (SEM) study confirms the average particle size of the Pani@ASG nanocomposite is in the range of 5 nm. FESEM, TEM, FTIR, and XRD analysis proved the successful decoration of ASG over Pani. The BET result of Pani@ASG shows a mesoporous nature with a pore diameter of less than 3 nm and a surface area of 423.90 m2 g–1. Both SEM and TEM analyses show the proportional distribution of ASG over Pani’s surface. The adsorption trend of BG and MO on the studied materials at pH 7 was found as follows: Pani@ASG > Pani > ASG. The highest sorption capacities of MO and BG on Pani@ASG were 161.29 and 136.98 mg/g (T = 298.15 K, and Pani@ASG dose: 0.04 g for MO and 0.06 g for BG), which were greater compared with bare Pani and bare ASG, respectively. The interaction mechanism behind the adsorption of BG and MO dyes onto the Pani@ASG nanocomposite includes electrostatic interaction, π–π interaction, and hydrogen bonding. The mechanistic pathway and the interactions between the targeted dyes and Pani@ASG were further studied using adsorption isotherm, adsorption kinetics, and thermodynamics.

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“…In the past few decades, several processes like coagulation, ion exchange, reverse osmosis, membrane separation process, flocculation, and photocatalysis − methods have been used for water purification, but each method has its own limitations. However, these water filtration techniques are expensive, produce secondary contaminants, need additional processing, use a lot of energy, and have low sequestration of the targeted contaminants over time.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Ternary NLP/ZnO@l-cysteine-grafted-PANI Bionanocomposites for the Selective Removal of Anionic and Cationic Dyes from Synthetic and Real Water Samples

et al. 2022

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Novel 2D Nanomaterial Composites Photocatalysts: Application in Degradation of Water Contaminants

Cited by 8 publications

References 94 publications

Reduced Graphene Oxide-Modified Spinel Cobalt Ferrite Nanocomposite: Synthesis, Characterization, and Its Superior Adsorption Performance for Dyes and Heavy Metals

Reduced Graphene Oxide-Modified Spinel Cobalt Ferrite Nanocomposite: Synthesis, Characterization, and Its Superior Adsorption Performance for Dyes and Heavy Metals

Experimental Insights into Mesoporous Polyaniline-Based Nanocomposites for Anionic and Cationic Dye Removal

Multifunctional Ternary NLP/ZnO@l-cysteine-grafted-PANI Bionanocomposites for the Selective Removal of Anionic and Cationic Dyes from Synthetic and Real Water Samples

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