Synthesis and Characterization of Mesoporous Aluminosilicates for Copper Removal from Aqueous Medium

Aguilera-Alvarado, A. F.; Cano-Aguilera, Irene; Martínez-Rosales, Merced; Holmes, Stuart M.

doi:10.4236/msa.2012.37068

Cited by 7 publications

(2 citation statements)

References 29 publications

(27 reference statements)

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“…Whereas the isotherm of EC-GC8 shown in Fig. 4(b) is a characteristic of a typical mesoporous-like material, which is confirmed by the type IV plateau with an H3 hysteresis loop 41,50,51 . In this, we could observe a higher surface area of 329.99 m 2 g −1 and the material is mesoporous with pore size and volume of 45.8 nm and 0.11 cm 3 g −1 respectively ( Fig.…”

Section: Resultsmentioning

confidence: 68%

Perovskite Solar Cells: A Porous Graphitic Carbon based Hole Transporter/Counter Electrode Material Extracted from an Invasive Plant Species Eichhornia Crassipes

Pitchaiya

Eswaramoorthy

Muthukumarasamy³

et al. 2020

Sci Rep

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perovskite solar cells (pScs) composed of organic polymer-based hole-transporting materials (HtMs) are considered to be an important strategy in improving the device performance, to compete with conventional solar cells. Yet the use of such expensive and unstable HTMs, together with hygroscopic perovskite structure remains a concern -an arguable aspect for the prospect of onsite photovoltaic (PV) application. Herein, we have demonstrated the sustainable fabrication of efficient and air-stable PSCs composed of an invasive plant (Eichhornia crassipes) extracted porous graphitic carbon (ec-Gc) which plays a dual role as HTM/counter electrode. The changes in annealing temperature (~450 °C, ~850 °C and ~1000 °C) while extracting the EC-GC, made a significant impact on the degree of graphitization -a remarkable criterion in determining the device performance. Hence, the fabricated champion device-1 c : Glass/fto/c-tio 2 /mp-tio 2 /cH 3 nH 3 pbi 3−x cl x /EC-GC10@CH 3 nH 3 pbi 3−x cl x /EC-GC10) exhibited a PCE of 8.52%. Surprisingly, the introduced EC-GC10 encapsulated perovskite interfacial layer at the perovskite/HtM interface helps in overcoming the moisture degradation of the hygroscopic perovskite layer in which the same champion device-1 c evinced better air stability retaining its efficiency ~94.40% for 1000 hours. We believe that this present work on invasive plant extracted carbon playing a dual role, together as an interfacial layer may pave the way towards a reliable perovskite photovoltaic device at low-cost.Lower cost, shorter payback time and an unprecedented rise in power conversion efficiency (PCE) escalating from 3.8% in 2009 to 24.2% (2019) have turned the attention of researchers and industrial community towards perovskite solar cells (PSCs) within a decade 1-5 . Outstanding photovoltaic properties such as high charge carrier mobility, long electron-hole diffusion length, high absorption coefficient with tuneable bandgap property, low-exciton binding energy, and easy solution preparation techniques make it to compete with traditional commercial silicon solar cells 6,7 . In general, a typical PSC is composed of an electron transport layer (ETL), an active absorbing layer, a HTL, and a counter electrode. Nevertheless, the use of expensive and unstable conducting polymers based hole transporting materials (HTMs) such as (2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)-9

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Section: Resultsmentioning

confidence: 68%

Perovskite Solar Cells: A Porous Graphitic Carbon based Hole Transporter/Counter Electrode Material Extracted from an Invasive Plant Species Eichhornia Crassipes

Pitchaiya

Eswaramoorthy

Muthukumarasamy³

et al. 2020

Sci Rep

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“…The isotherms of all of the Pd/SZ samples demonstrated type H3 hysteresis, which is associated with slit-shaped mesopores. 40,41 The desorption of N 2 from mesopores of various sizes contributes to the slopes of hysteresis in the respective isotherms. The pore-size distributions of the samples in Figure 7 were analyzed based on the desorption branch in the N 2 isotherm.…”

Section: Resultsmentioning

confidence: 99%

Investigation of the Effect of Alumina Binder Addition to Pd/SO₄^2––ZrO₂ Catalysts during Sol–Gel Synthesis

Majumdar

Çelik

Ozkan

2016

Ind. Eng. Chem. Res.

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We have incorporated alumina into palladium catalysts supported on sulfated zirconia (Pd/SZ) during sol–gel synthesis for application in a washcoat for NO x emissions control in natural gas-fired lean-burn engines. In situ incorporation of the adhesivity-enhancing “binder”, alumina, during the sol–gel synthesis of the Pd/SZ catalyst demonstrated significantly improved NO x reduction activity of the previously reported dual-catalyst bed when compared to the conventional ex situ mode of binder addition in a slurry. The effects of alumina addition during sol–gel synthesis of Pd/SZ on the structural, textural, and chemical properties of the resulting catalyst were examined in this study. The evolution of the crystal phase of zirconia during calcination of the Pd/SZ catalyst with the binder incorporated during the sol–gel process was studied using in situ XRD during calcination under air. Comparison of the crystal phase composition of the binder-free and binder-incorporated samples calcined at 700 and 900 °C demonstrated a stabilizing effect on the tetragonal zirconia in the presence of alumina or boehmite dopants. N2 adsorption experiments at 77 K indicated the presence of slit-shaped multimodal hierarchical pores as a result of sol–gel alumina addition. EPR spectra indicated that sol–gel alumina incorporation affected the nature of the Pd species on the resulting catalyst. 27Al MAS NMR spectroscopy revealed a strong interaction of the alumina binder with the zirconia support. The possible formation of a zirconia–alumina solid solution was suggested and was further examined using laser Raman spectroscopy. The influence of the alumina dopant in the zirconia matrix on the chemical states of Zr, S, O, and Al was investigated using XPS. Ar+-ion-gun sputtering provided valuable insights into the nature of the alumina–support interaction due to in situ alumina incorporation during the sol–gel synthesis of Pd/SZ catalysts.

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Alginate/chitosan polyelectrolyte complexes: A comparative study of the influence of the drying step on physicochemical properties

Conzatti

Faucon

Castel

et al. 2017

Carbohydrate Polymers

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Polyelectrolyte complexes (PECs) based on Alginate and Chitosan were prepared for biomedical application. These two biopolymers are valuable resources for biomedical applications. In the present work, three PECs materials were produced using three different drying techniques: hot air drying, lyophilization and supercritical CO drying. The choice of the drying technique allowed producing different type of structures, with different porosity scale. In order to evaluate their potential as intra-abdominal wound dressings, swelling ability in various media, enzymatic resistance and drug release behavior of the resulting materials was studied. It was shown that the increase of the porosity improved the swelling ability, without altering the resistance of the materials, whereas drug release studies revealed that the majority of the drug was released within the first 24h whatever the drying process.

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Synthesis and Characterization of Mesoporous Aluminosilicates for Copper Removal from Aqueous Medium

Cited by 7 publications

References 29 publications

Perovskite Solar Cells: A Porous Graphitic Carbon based Hole Transporter/Counter Electrode Material Extracted from an Invasive Plant Species Eichhornia Crassipes

Perovskite Solar Cells: A Porous Graphitic Carbon based Hole Transporter/Counter Electrode Material Extracted from an Invasive Plant Species Eichhornia Crassipes

Investigation of the Effect of Alumina Binder Addition to Pd/SO₄^2––ZrO₂ Catalysts during Sol–Gel Synthesis

Alginate/chitosan polyelectrolyte complexes: A comparative study of the influence of the drying step on physicochemical properties

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Synthesis and Characterization of Mesoporous Aluminosilicates for Copper Removal from Aqueous Medium

Cited by 7 publications

References 29 publications

Perovskite Solar Cells: A Porous Graphitic Carbon based Hole Transporter/Counter Electrode Material Extracted from an Invasive Plant Species Eichhornia Crassipes

Perovskite Solar Cells: A Porous Graphitic Carbon based Hole Transporter/Counter Electrode Material Extracted from an Invasive Plant Species Eichhornia Crassipes

Investigation of the Effect of Alumina Binder Addition to Pd/SO42––ZrO2 Catalysts during Sol–Gel Synthesis

Alginate/chitosan polyelectrolyte complexes: A comparative study of the influence of the drying step on physicochemical properties

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Investigation of the Effect of Alumina Binder Addition to Pd/SO₄^2––ZrO₂ Catalysts during Sol–Gel Synthesis