Pre-treatment of desalination feed seawater by Jordanian Tripoli, Pozzolana, and Feldspar: Batch experiments

In this research, composites of layered double hydroxide (LDH) with three Jordanian natural raw materials; Tripoli (T), Pozzolana (P) and Feldspar (F) were prepared by co-precipitation and have been used for feed seawater pre-treatment. The data reveals that percent adsorption decreased with increase in initial concentration, but the actual amount of adsorbed ions per unit mass of LDH/T-P-F increased with increase in metal ion concentrations. The values of ?Go were negative and within 21 to 26 KJ/mol, while the values of ?Ho and ?So were positive and within the range of 0.1 to 25 KJ/mol. The values of ?H?, ?S?, and ?G? indicate the favorability of physisorption and show that the LDH/T-P-F composites have a considerable potential as adsorbents for the removal of ions from seawater.

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Hierarchical Two-Dimensional Layered Double Hydroxide Coated Polydopamine Nanocarriers for Combined Chemodynamic and Photothermal Tumor Therapy

Coatings ◽

10.3390/coatings11081008 ◽

2021 ◽

Vol 11 (8) ◽

pp. 1008

Author(s):

Prabhakar Busa ◽

Ravindranadh Koutavarapu ◽

Dong-Yeon Lee ◽

Jaesool Shim ◽

Yaswanth Kuthati

Keyword(s):

Cancer Cells ◽

Layered Double Hydroxide ◽

Metal Ion ◽

Tumor Therapy ◽

Therapeutic Modality ◽

Precipitation Method ◽

Enhanced Absorption ◽

Co Precipitation ◽

Double Hydroxide

The combination of chemodynamic therapy (CDT) and photothermal therapy (PTT) has proven to be successful in combating the challenges associated with cancer therapy. A combination of these therapies can maximize the benefits of each therapeutic modality through endogenous reduction-oxidation (redox) reaction and external laser power induction. In the current work, we have designed a copper-aluminum layered double hydroxide (CuAl-LDH) loaded doxorubicin (DOX) by a co-precipitation method; the surface was coated with polydopamine (PDA). The synthesized CuAl-LDH@DOX@PDA nanocarrier (NC) served as a Fenton-like catalyst with photothermal properties. It is well known that metal ion incorporated NCs can induce intracellular depletion of reduced glutathione (GSH) levels along with the reduction of Cu2+ to Cu+. The Cu+ ions in turn react with DOX leading to the generation of intracellular hydrogen peroxide (H2O2) molecules to produce the highly toxic hydroxyl radicals (•OH) through a Fenton-like reaction. The enhanced absorption of CuAl@DOX@PDA at 810 nm, greatly improved the photothermal efficiency in comparison with bare CuAl-LDH and CuAl-LDH@DOX. In vitro studies revealed the tremendous CDT/PTT efficacy of CuAl@DOX@PDA in suppressing A549 cancer cells. Furthermore, reactive oxygen species (ROS) assays and intracellular levels of various ROS cascade biomolecules support our findings in the efficient destruction of cancer cells through synergistic CDT/PTT therapy.

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An elegant synthesis of chitosan grafted hydrotalcite nano-bio composite material and its effective catalysis for solvent-free synthesis of jasminaldehyde

RSC Advances ◽

10.1039/c5ra16927e ◽

2015 ◽

Vol 5 (115) ◽

pp. 94562-94570 ◽

Cited By ~ 7

Author(s):

Jacky H. Adwani ◽

Noor-ul H. Khan ◽

Ram S. Shukla

Keyword(s):

Composite Material ◽

Layered Double Hydroxide ◽

Solvent Free ◽

Precipitation Method ◽

Co Precipitation ◽

Double Hydroxide ◽

Solvent Free Synthesis

A novel nano-bio composite of chitosan and a layered double hydroxide elegantly synthesized by a co-precipitation method had effectively and selectively catalysed the jasminaldehyde synthesis.

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Green light (550 nm) driven tunable syngas synthesis from CO2 photoreduction using heterostructured layered double hydroxide/TiC photocatalysts

Catalysis Science & Technology ◽

10.1039/d1cy01366a ◽

2021 ◽

Author(s):

Huijuan Wang ◽

Sha Bai ◽

Pu Zhao ◽

Tian Li ◽

Chenjun Ning ◽

...

Keyword(s):

Layered Double Hydroxide ◽

Large Scale ◽

Raw Materials ◽

Green Light ◽

Photocatalytic Reduction ◽

Co2 Utilization ◽

Co2 Photoreduction ◽

Reduction Of Co2 ◽

Double Hydroxide

Synthesis of syngas (CO, H2) by photocatalytic reduction of CO2 and H2O represents an eco-friendly pathway for large-scale CO2 utilization for the production of chemical raw materials with high added...

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Stabilization of Dicalcium Silicate-Zn Composite Approaching Layered Double Hydroxide Structure for Bioactive Cement Applications

10.4028/www.scientific.net/cta.1.668 ◽

2022 ◽

Author(s):

Hind Agourrame ◽

Amine Belafhaili ◽

Nisrine El Fami ◽

Nacer Khachani ◽

Mohamed Alami Talbi ◽

...

Keyword(s):

Acid Solution ◽

Layered Double Hydroxide ◽

S Phase ◽

Dicalcium Silicate ◽

Metal Salts ◽

Basic Solution ◽

Silicate Phase ◽

Edax Analysis ◽

Co Precipitation ◽

Double Hydroxide

Layered Double Hydroxide (LDH) is ionic clay that is characterized by the union of metal cations and OH- hydroxides. LDH composites exhibit considerably high releasing and recharging capacity and have applications as bioactive cements. They can be prepared by direct co-precipitation of metal salts at controlled pH. The preparation is carried out from an acid solution of Zn (NO3)2.6H2O, Al (NO3)3.9H2O and a basic solution of Na2CO3 and NaOH, with a Zn/Al ratio = 3, the pH is stabilized between 9 and 9.5 at a constant temperature of 45°C. The objective of this study is to incorporate Zinc and Aluminum elements at different percentages in dicalcium silicate phase to produce C2S phase incorporating LDH composite. The characterizations of the developed phases by XRD and SEM indicate the formation of stoichiometric LDH phases Zn6Al2(OH)16CO3.4H2O and non-stoichiometric Zn0.61Al0.39 (OH)2(CO3)0.195.xH2O, the incorporation of Zn in the belitic C2S phase and not Al. The obtained micrographs by SEM(EDAX) analysis show new morphology of the stabilized composite.

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Cu/Al Layered Double Hydroxide by Co-precipitation with High Anti-UV Performance in Waterborne Varnish

Chemistry Letters ◽

10.1246/cl.190342 ◽

2019 ◽

Vol 48 (8) ◽

pp. 866-869

Author(s):

Xiuxiu Han ◽

Shuhua Zhang ◽

Jingjing Lu ◽

Yingying Ma ◽

Nengshuo Fu ◽

...

Keyword(s):

Layered Double Hydroxide ◽

Co Precipitation ◽

Double Hydroxide

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Synthesis of YAG Powders by Co-Precipitation Method

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.602-603.110 ◽

2014 ◽

Vol 602-603 ◽

pp. 110-113 ◽

Cited By ~ 1

Author(s):

Yan Juan Li ◽

Ying Chun Zhang ◽

Jia Xun Leng

Keyword(s):

Crystal Structure ◽

Metal Ion ◽

Yttrium Aluminum Garnet ◽

Raw Materials ◽

Nitrate Solution ◽

Particle Size Analysis ◽

Precipitation Method ◽

Size Analysis ◽

Yttrium Nitrate ◽

Co Precipitation

In this paper, yttrium aluminum garnet (YAG) powders were synthesized by the normal-strike co-precipitation method (adding precipitant solution to the metal nitrate solution). Aluminum nitrate (Al (NO3)39H2O) and yttrium nitrate (Y(NO3)36H2O) were used as raw materials and ammonium hydrogen carbonate (AHC) was used as the precipitant. The precursor was calcined at the temperature of 900-1200 °C for 2 hours. The crystal structure and microstructure of YAG powders were investigated and analyzed by XRD, FESEM, TG-DTA and laser particle size analysis. The results show that the concentration of metal ion and AHC have a significant effect on crystal structure of YAG powders, and pure YAG powders were obtained at 1000 °C when the concentration of Al3+was 0.1 mol/L and the concentration of AHC was 1 mol/L. The average primary crystallites particle sizes were ranged from 50 nm to100 nm in diameter. nanosize YAG powders with excellent properties and good dispersity can be produced at the temperature of 1100 °C.

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Structural Stability of Ni/Al Layered Double Hydroxide Supported on Graphite and Biochar Toward Adorption of Congo Red

Science & Technology Indonesia ◽

10.26554/sti.2021.6.2.85-95 ◽

2021 ◽

Vol 6 (2) ◽

pp. 85-95

Author(s):

Patimah Mega Syah Bahar Nur Siregar ◽

Neza Rahayu Palapa ◽

Alfan Wijaya ◽

Erni Salasia Fitri ◽

Aldes Lesbani

Keyword(s):

Aqueous Solution ◽

Adsorption Capacity ◽

Layered Double Hydroxide ◽

Congo Red ◽

High Performance ◽

Precipitation Method ◽

First Order ◽

Xrd Diffraction ◽

Co Precipitation ◽

Double Hydroxide

In this research, Ni/Al layered double hydroxide (LDH) was modified by using co-precipitation method to generate Ni/Al-graphite (Ni/Al-GF) and Ni/Al-biochar (Ni/Al-BC). The adsorbents were applied to remove Congo Red from aqueous solution. The obtained samples were characterized by using XRD, FTIR, BET and TG-DTA. The XRD diffraction pattern of Ni/Al LDH, Ni/Al-GF, and Ni/Al-BC presented the formation of composite with decreasing crystallinity. The surface area modified LDHs was higher than the pristine materials, which was obtained 15.106 m2/g, 21.595 m2/g and 438.942 m2/g for Ni/Al-LDH, Ni/Al-GF, Ni/Al-BC respectively. The adsorption of Congo Red on the materials was tested at diferent parameters and the results exhibited that Congo Red adsorption on LDHs were pseudo-first-order (PFO) kinetic, spontaneous, endothermic and followed Langmuir model. The adsorbents removed Congo Red by high performance stability with adsorption capacity was 116.297 mg/g for Ni/Al-GF and 312.500 mg/g for Ni/Al-BC. These adsorption capacity was higher than the pristine LDH (61.728 mg/g). The regeneration process which carried out for five cycles showed that Ni/Al-GF and Ni/Al-BC have stable structures as reuse adsorbents for Congo Red from aqueous solution.

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Photodecolourization of congo red dye in presence of Ni3+ layered double hydroxide

BIO Web of Conferences ◽

10.1051/bioconf/20213002010 ◽

2021 ◽

Vol 30 ◽

pp. 02010

Author(s):

Irina Ryltsova ◽

Evgenia Tarasenko ◽

Olga Lebedeva

Keyword(s):

Layered Double Hydroxide ◽

Congo Red ◽

Uv Light ◽

Order Kinetic ◽

X Ray ◽

Congo Red Dye ◽

Order Kinetic Model ◽

Co Precipitation ◽

Red Dye ◽

Double Hydroxide

Layered double hydroxide containing Ni3+ (Mg/AlNi-LDH) was successfully synthesized by co-precipitation in an oxidizing media. The resulted product was characterized using X-ray diffraction, wavelength dispersive X-ray fluorescence spectrometry. The activity of Mg/AlNi-LDH in the process of photodegradation of Congo red dye using UV light irradiation was evaluated. The initial rate of photodegradation of the dye in the presence of LDH is 1.6 times higher than that of UV irradiated solution. The kinetic data obtained for photodegradation process can be adequately described by pseudo-first-order kinetic model. The presence of Mg/AlNi – LDH leads to increased photodegradation yield compared to destruction only by UV irradiation.

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Removal of Cd2+ from Aqueous Solution Using MgAlCO3 -Layered Double Hydroxide

Scientific Research Journal ◽

10.24191/srj.v8i2.5047 ◽

2011 ◽

Vol 8 (2) ◽

pp. 13 ◽

Cited By ~ 1

Author(s):

Nurul Izza Taib ◽

Norzuyanti Mohd Aris

Keyword(s):

Contact Time ◽

Molar Ratio ◽

X Ray Diffraction ◽

Initial Concentration ◽

Adsorbent Dosage ◽

Freundlich Isotherms ◽

Exothermic Process ◽

Temperature And Pressure ◽

Co Precipitation ◽

Double Hydroxide

Anion clay hydrotalcite MgAlCO3 with a Mg/Al molar ratio of 3:1 was synthesized by co-precipitation at room temperature and pressure. The physicochemical properties were evaluated using Powder X-Ray Diffraction (PXRD), Fourier Transform Infrared (FTIR) spectroscopy and Thermogravimetric Analysis (TGA). The efficacy of anion clay hydrotalcite in the removal of Cd2+ from aqueous solutions was investigated with respect to contact time, initial concentration, pH, adsorbent dosage and temperature. The Cd2+ removal increased with the increased in contact time, adsorbent dosage, pH and initial concentration. Adsorption decreases with increasing initial concentration and temperature, for which the latter is indicative of an exothermic process. The equilibrium adsorption capacity of MgAlCO3 was evaluated using linear Langmuir and Freundlich isotherms with respect to the separation factor, RL .

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Fabrication of TiO2@ZnAl-layered double hydroxide based anode material for dye-sensitized solar cell

RSC Advances ◽

10.1039/c5ra23384d ◽

2016 ◽

Vol 6 (13) ◽

pp. 10912-10918 ◽

Cited By ~ 19

Author(s):

Leila Jafari Foruzin ◽

Zolfaghar Rezvani ◽

Kamellia Nejati

Keyword(s):

Solar Cell ◽

Anode Material ◽

Layered Double Hydroxide ◽

Dye Sensitized Solar Cell ◽

Precipitation Method ◽

Dye Sensitized ◽

Co Precipitation ◽

Double Hydroxide

A TiO2@ZnAl-layered double hydroxide nanocomposite was prepared by the co-precipitation method; then, the product was calcined in order to obtain the TiO2@MMO nanocomposite, and use as anode material in dye-sensitized solar cell (DSSC).

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