Preparation of MoS2 nano-corals by hydrothermal method for adsorption of tartrazine in the aqueous medium

Corals-like molybdenum disulfide (MoS2) have been successfully synthesized via the hydrothermal method. The as-prepared MoS2 material with a high surface area of 83.9 m2.g-1 was used for the removal of tartrazine from an aqueous solution. The effects of parameters including contact time, MoS2 dosage, and solution pH on adsorption capacity were studied. The optimal dosage of MoS2 for removing tartrazine was 0.08 g and the removal efficiency of tartrazine reached 81.5 % for 100 min of adsorption. The adsorption kinetics studies were carried out using pseudo-first-order, pseudo-second-order, and intra-particle diffusion models. The results showed that the pseudo-second-kinetic model better described the adsorption kinetics of tartrazine on MoS2 and film diffusion was the rate-limiting step. In addition, the adsorption capacity of MoS2 was also performed with various organic dyes such as nile blue, janus green B, and congo red.

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Dye-Adsorption Capacity of High Surface-Area Hydrogen Titanate Nanosheets Processed via Modified Hydrothermal Method

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2013.7367 ◽

2013 ◽

Vol 13 (4) ◽

pp. 3035-3045 ◽

Cited By ~ 5

Author(s):

Hareesh Padinhattayil ◽

Rimesh Augustine ◽

Satyajit Shukla

Keyword(s):

Adsorption Capacity ◽

Hydrothermal Method ◽

Surface Area ◽

High Surface ◽

High Surface Area ◽

Dye Adsorption ◽

Hydrogen Titanate ◽

Titanate Nanosheets ◽

Modified Hydrothermal Method

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Adsorption study of toxic metal ions using functionalized 3D mesostructured silica

10.21203/rs.3.rs-493842/v1 ◽

2021 ◽

Author(s):

Nagy Torad ◽

Ahmed Abu El-Nasr ◽

Nehal Salahuddin ◽

mohamad ayad

Keyword(s):

Metal Ions ◽

Adsorption Capacity ◽

High Surface ◽

High Surface Area ◽

Toxic Metal ◽

Thin Layers ◽

Detection Sensitivity ◽

Order Kinetic ◽

Solution Ph ◽

Mesostructured Silica

Abstract Mesoporous silica KIT-6 was chemically modified using 3-mercaptopropyltriethoxysilane (3-MPTS) via post-grafting method to prepare functionalized mesoporous KIT-6-SO3H with highly acidic ‒SO3H groups. Thin layers of KIT-6-SO3H coating onto quartz crystal microbalance (QCM) electrodes are employed as a meso-KIT-6-QCM sensor for the adsorptive removal of Pd(II), Cd(II) and Cs(I) ions with a high detection sensitivity. From ICP-OES measurements, the calculated adsorption capacity (Qe) values are much coincide with that obtained from QCM sensor. Due to the synergetic cooperation between high surface area, large pore volumes and active ‒SO3H groups, KIT-6-SO3H exhibited a remarkable adsorption capacity for metal ions. The effect of initial solution pH on the metal ions uptake was carefully studied. Kinetics and isotherm studies further reveal that adsorption of metal ions by KIT-6-SO3H obeys second-order kinetic and Langmuir isotherm, respectively.

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Roll-to-roll fabrication of high surface area mesoporous carbon with process-tunable pore texture for optimization of adsorption capacity of bulky organic dyes

Microporous and Mesoporous Materials ◽

10.1016/j.micromeso.2016.02.015 ◽

2016 ◽

Vol 227 ◽

pp. 57-64 ◽

Cited By ~ 23

Author(s):

Zhe Qiang ◽

Burcu Gurkan ◽

Jianxing Ma ◽

Xiangyu Liu ◽

Yuanhao Guo ◽

...

Keyword(s):

Adsorption Capacity ◽

Surface Area ◽

Mesoporous Carbon ◽

Organic Dyes ◽

High Surface ◽

High Surface Area ◽

Roll To Roll ◽

Pore Texture

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Effective Poly (Cyclotriphosphazene-Co-4,4′-Sulfonyldiphenol)@rGO Sheets for Tetracycline Adsorption: Fabrication, Characterization, Adsorption Kinetics and Thermodynamics

Nanomaterials ◽

10.3390/nano11061540 ◽

2021 ◽

Vol 11 (6) ◽

pp. 1540

Author(s):

Muhammad Ahmad ◽

Tehseen Nawaz ◽

Mohammad Mujahid Alam ◽

Yasir Abbas ◽

Shafqat Ali ◽

...

Keyword(s):

Adsorption Capacity ◽

Surface Area ◽

High Surface ◽

High Surface Area ◽

High Adsorption ◽

Clean Environment ◽

Equilibrium Data ◽

Langmuir Isotherm Model ◽

High Adsorption Capacity ◽

Adsorption Equilibrium Data

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.

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A new biocompatible ternary Layered Double Hydroxide Adsorbent for ultrafast removal of anionic organic dyes

Scientific Reports ◽

10.1038/s41598-019-52849-4 ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 11

Author(s):

Garima Rathee ◽

Amardeep Awasthi ◽

Damini Sood ◽

Ravi Tomar ◽

Vartika Tomar ◽

...

Keyword(s):

Waste Water ◽

Methyl Orange ◽

Surface Area ◽

Layered Double Hydroxide ◽

Removal Efficiency ◽

Organic Dyes ◽

High Surface ◽

High Surface Area ◽

Morphological Studies ◽

Double Hydroxide

Abstract It would be of great significance to introduce a new biocompatible Layered Double Hydroxide (LDH) for the efficient remediation of wastewater. Herein, we designed a facile, biocompatible and environmental friendly layered double hydroxide (LDH) of NiFeTi for the very first time by the hydrothermal route. The materialization of NiFeTi LDH was confirmed by FTIR, XRD and Raman studies. BET results revealed the high surface area (106 m2/g) and the morphological studies (FESEM and TEM) portrayed the sheets-like structure of NiFeTi nanoparticles. The material so obtained was employed as an efficient adsorbent for the removal of organic dyes from synthetic waste water. The dye removal study showed >96% efficiency for the removal of methyl orange, congo red, methyl blue and orange G, which revealed the superiority of material for decontamination of waste water. The maximum removal (90%) of dyes was attained within 2 min of initiation of the adsorption process which supported the ultrafast removal efficiency. This ultrafast removal efficiency was attributed to high surface area and large concentration of -OH and CO32− groups present in NiFeTi LDH. In addition, the reusability was also performed up to three cycles with 96, 90 and 88% efficiency for methyl orange. Furthermore, the biocompatibility test on MHS cell lines were also carried which revealed the non-toxic nature of NiFeTi LDH at lower concentration (100% cell viability at 15.6 μg/ml). Overall, we offer a facile surfactant free method for the synthesis of NiFeTi LDH which is efficient for decontamination of anionic dyes from water and also non-toxic.

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Experimental and Modeling of Dicamba Adsorption in Aqueous Medium Using MIL-101(Cr) Metal-Organic Framework

Processes ◽

10.3390/pr9030419 ◽

2021 ◽

Vol 9 (3) ◽

pp. 419

Author(s):

Hamza Ahmad Isiyaka ◽

Khairulazhar Jumbri ◽

Nonni Soraya Sambudi ◽

Jun Wei Lim ◽

Bahruddin Saad ◽

...

Keyword(s):

Aqueous Medium ◽

Adsorption Capacity ◽

Environmental Concern ◽

Metal Organic Framework ◽

High Surface ◽

High Surface Area ◽

Data Matrix ◽

Adsorption Parameters ◽

Metal Organic ◽

Organic Framework

Drift deposition of emerging and carcinogenic contaminant dicamba (3,6-dichloro-2-methoxy benzoic acid) has become a major health and environmental concern. Effective removal of dicamba in aqueous medium becomes imperative. This study investigates the adsorption of a promising adsorbent, MIL-101(Cr) metal-organic framework (MOF), for the removal of dicamba in aqueous solution. The adsorbent was hydrothermally synthesized and characterized using N2 adsorption-desorption isotherms, Brunauer, Emmett and Teller (BET), powdered X-ray diffraction (XRD), Fourier Transformed Infrared (FTIR) and field emission scanning electron microscopy (FESEM). Adsorption models such as kinetics, isotherms and thermodynamics were studied to understand details of the adsorption process. The significance and optimization of the data matrix, as well as the multivariate interaction of the adsorption parameters, were determined using response surface methodology (RSM). RSM and artificial neural network (ANN) were used to predict the adsorption capacity. In each of the experimental adsorption conditions used, the ANN gave a better prediction with minimal error than the RSM model. The MIL-101(Cr) adsorbent was recycled six times to determine the possibility of reuse. The results show that MIL-101(Cr) is a very promising adsorbent, in particular due to the high surface area (1439 m2 g−1), rapid equilibration (~25 min), high adsorption capacity (237.384 mg g−1) and high removal efficiency of 99.432%.

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Morphology dependent adsorption of methylene blue on trititanate nanoplates and nanotubes prepared by the hydrothermal treatment of TiO2

Water Science & Technology ◽

10.2166/wst.2016.519 ◽

2016 ◽

Vol 75 (2) ◽

pp. 350-357

Author(s):

Graham Dawson ◽

Wei Chen ◽

Luhua Lu ◽

Kai Dai

Keyword(s):

Methylene Blue ◽

Adsorption Capacity ◽

Surface Area ◽

Pore Volume ◽

Hydrothermal Reaction ◽

Low Cost ◽

High Surface ◽

High Surface Area ◽

High Capacity ◽

Adsorption Properties

The adsorption properties of two nanomorphologies of trititanate, nanotubes (TiNT) and plates (TiNP), prepared by the hydrothermal reaction of concentrated NaOH with different phases of TiO2, were examined. It was found that the capacity for both morphologies towards methylene blue (MB), an ideal pollutant, was extremely high, with the TiNP having a capacity of 130 mg/g, higher than the TiNT, whose capacity was 120 mg/g at 10 mg/L MB concentration. At capacity, the well-dispersed powders deposit on the floor of the reaction vessel. The two morphologies had very different structural and adsorption properties. TiNT with high surface area and pore volume exhibited exothermic monolayer adsorption of MB. TiNP with low surface area and pore volume yielded a higher adsorption capacity through endothermic multilayer adsorption governed by pore diffusion. TiNP exhibited a higher negative surface charge of −23 mV, compared to −12 mV for TiNT. The adsorption process appears to be an electrostatic interaction, with the cationic dye attracted more strongly to the nanoplates, resulting in a higher adsorption capacity and different adsorption modes. We believe this simple, low cost production of high capacity nanostructured adsorbent material has potential uses in wastewater treatment.

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Quaternization of Poly(2-diethyl aminoethyl methacrylate) Brush-Grafted Magnetic Mesoporous Nanoparticles Using 2-Iodoethanol for Removing Anionic Dyes

Applied Sciences ◽

10.3390/app112110451 ◽

2021 ◽

Vol 11 (21) ◽

pp. 10451

Author(s):

Khalid Mohammed Alotaibi ◽

Abdurrahman A. Almethen ◽

Abeer M. Beagan ◽

Hassan M. Al-Swaidan ◽

Ashfaq Ahmad ◽

...

Keyword(s):

Mesoporous Silica Nanoparticles ◽

High Surface ◽

High Surface Area ◽

Polymer Chains ◽

Sunset Yellow ◽

Anionic Dyes ◽

Solution Ph ◽

Effects Of Ph ◽

Weak Adsorption ◽

Ph Level

Magnetic mesoporous silica nanoparticles (Fe3O4-MSNs) were successfully synthesized with a relatively high surface area of 568 m2g−1. Fe3O4-MSNs were then modified with poly(2-diethyl aminoethyl methacrylate) (PDEAEMA) brushes using surface-initiated ARGET atom transfer radical polymerization (ATRP) (Fe3O4@MSN-PDMAEMA). Since the charge of PDEAEMA is externally regulated by solution pH, tertiary amines in the polymer chains were quaternized using 2-iodoethanol to obtain cationic polymer chains with a permanent positive charge (Fe3O4@MSN-QPDMAEMA). The intensity of the C−O peak in the C1s X-ray photoelectron spectrum increased after reaction with 2-iodoethanol, suggesting that the quaternization process was successful. The applicability of the synthesized materials on the removal of methyl orange (MO), and sunset yellow (E110) dyes from an aqueous solution was examined. The effects of pH, contact time, and initial dyes concentrations on the removal performance were investigated by batch experiments. The results showed that the Fe3O4@MSN-PDMAEMA sample exhibited a weak adsorption performance toward both MO and E110, compared with Fe3O4@MSN-QPDMAEMA at a pH level above 5. The maximum adsorption capacities of MO and E110 using Fe3O4@MSN-QPDMAEMA were 294 mg g−1 and 194.8 mg g−1, respectively.

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Adsorption of Mn2+ from Aqueous Solution Using Manganese Oxide-Coated Hollow Polymethylmethacrylate Microspheres (MHPM)

Adsorption Science & Technology ◽

10.1155/2021/5597299 ◽

2021 ◽

Vol 2021 ◽

pp. 1-10

Author(s):

Dhiraj Dutta ◽

Jyoti Prasad Borah ◽

Amrit Puzari

Keyword(s):

Aqueous Solution ◽

Manganese Oxide ◽

Adsorption Capacity ◽

High Surface ◽

High Surface Area ◽

Freundlich Isotherm ◽

Ion Concentration ◽

Isotherm Models ◽

Maximum Adsorption Capacity ◽

Coated Sand

Results of investigation on adsorption of Mn2+ from aqueous solution by manganese oxide-coated hollow polymethylmethacrylate microspheres (MHPM) are reported here. This is the first report on Mn-coated hollow polymer as a substitute for widely used materials like green sand or MN-coated sand. Hollow polymethylmethacrylate (HPM) was prepared by using a literature procedure. Manganese oxide (MnO) was coated on the surface of HPM (MHPM) by using the electroless plating technique. The HPM and MHPM were characterized by using optical microscopy (OM), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). Optical and scanning micrographs were used to monitor the surface properties of the coated layer which revealed the presence of MnO on the surface of HPM. TGA showed the presence of 4-5% of MnO in MHPM. Adsorption isotherm studies were carried out as a function of pH, initial ion concentration, and contact time, to determine the adsorption efficiency for removal of Mn2+ from contaminated water by the synthesized MHPM. The isotherm results showed that the maximum adsorption capacity of MnO-coated HPM to remove manganese contaminants from water is 8.373 mg/g. The obtained R 2 values of Langmuir isotherm and Freundlich isotherm models were 1 and 0.87, respectively. Therefore, R 2 magnitude confirmed that the Langmuir model is best suited for Mn2+ adsorption by a monolayer of MHPM adsorbent. The material developed shows higher adsorption capacity even at a higher concentration of solute ions, which is not usually observed with similar materials of this kind. Overall findings indicate that MHPM is a very potential lightweight adsorbent for removal of Mn2+ from the aqueous solution because of its low density and high surface area.

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