Progress and perspectives on pillared clays applied in energetic and environmental remediation processes

Gil, A.; Vicente, M.A.

doi:10.1016/j.cogsc.2019.12.004

Cited by 29 publications

(14 citation statements)

References 52 publications

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“…Different environmental and chemical processes that have used pillared clays as catalysts are summarized in Figure 1 . Among the different applications of PILCs, the three main processes that have used them are oxidation techniques (34.3%), petrochemical reactions (17.5%), and selective catalytic reduction (SCR) of NOx (10.8%)[ 43 ]. Likewise, Figure 1 shows the variety of applications of PILCs in catalytic reactions such as isomerization, hydrogenation, hydroxylation, dehydrogenation, among others.…”

Section: Resultsmentioning

confidence: 99%

“…Likewise, Figure 1 shows the variety of applications of PILCs in catalytic reactions such as isomerization, hydrogenation, hydroxylation, dehydrogenation, among others. This versatility of pillared clays in various catalytic processes is attributable to the high acidic properties (surface acidity), porous structure, relatively good thermal stability, and catalytic active species/metal oxide pillars of PILCs [ 18 , 43 ].…”

Section: Resultsmentioning

confidence: 99%

“…Although the Keggin-Al 13 species is the most commonly used pillaring agent, in recent years, Keggin-Al 30 polycations have also been synthesized [ 43 ]. They have been conferred higher thermal stability and more Brønsted acid sites to the PILCs [ 43 , 81 ]. Nevertheless, both species (Keggin-Al 13 and Al 30 ) form stable pillars after subsequent calcination of the intercalated clay, leading to materials with higher surface area and catalytic activity.…”

Section: Resultsmentioning

confidence: 99%

“…Despite fluctuations in the number of papers on PILCs, a further increase in the number of publications is expected to occur in the coming years as some researchers have stated the growing interest of the scientific community towards the use of these materials in environmental applications as adsorbents for organic compounds in aqueous solution [ 43 , 116 ]. Moreover, in the last two decades, the field of application of PILCs has diversified in both catalytic and adsorption processes [ 48 , 117 , 118 ].…”

Section: Resultsmentioning

confidence: 99%

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Research Trends on Pillared Interlayered Clays (PILCs) Used as Catalysts in Environmental and Chemical Processes: Bibliometric Analysis

Macías-Quiroga

Rengifo‐Herrera

Arredondo-López

et al. 2022

The Scientific World Journal

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Over the last four decades, a large number of studies have been published on pillared interlayered clays (PILCs) used as adsorbent materials and catalysts or supports for transition metals in heterogeneous catalysis. Particularly, PILCs have been used for water treatment through advanced oxidation processes (AOPs) to remove organic pollutants. They have also been studied in various chemical and environmental processes. Because of the growing interest in PILCs, this article is focused on analyzing scientific publications such as research/review articles and book chapters from the last four decades (from 1980 to 2019) through a bibliometric analysis (BA) to visualize and describe research trends on PILCs. By narrowing the bibliographic search to titles, keywords, and abstracts of publications related to PILCs, using Scopus and Web of Science (WoS) (the two scientific databases), a total of 3425 documents have been retrieved. The bibliometric dataset was analyzed by VantagePoint®. The main research trends identified in the last four decades were the use of PILCs in environmental processes (34.4% of total publications) along with chemical processes (petrochemical reactions 17.5%, SCR NOx 10.8%, and decomposition 8.2%). In environmental processes, PILCs have been used in photo-oxidation (32%), CWPO (21.1%), and heterogeneous catalysis (19.4%). Phenols, dyes, and VOCs have been the main pollutants studied using PILCs as catalysts. Fe, Ti, Zr, Cu, and Co are the most supported active phases in PILCs. Other research trends grouped by characterization techniques, countries, research areas, institutes, scientific journals that have published the most on this topic, number of publications per 5-year period, and most frequently used keywords through the last four decades have been identified. It was determined that the number of publications on PILCs has increased since 1980 and the countries with the highest number of publications are China, Spain, and The United States of America.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Research Trends on Pillared Interlayered Clays (PILCs) Used as Catalysts in Environmental and Chemical Processes: Bibliometric Analysis

Macías-Quiroga

Rengifo‐Herrera

Arredondo-López

et al. 2022

The Scientific World Journal

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“…The resulting pillared clays exhibited good thermal stability at higher temperatures, higher surface areas, and higher acidity. The main application of the pillared clay minerals was in the catalysis filed; however, they were also used in environment remedial as adsorption of pollutants without or with additional modifications [ 26 ]. Since adsorption is a surface phenomenon, many studies were undertaken to improve the more and more the surface area of the pristine clay mineral and the removal sites in terms of hydroxyl groups, etc.…”

Section: Introductionmentioning

confidence: 99%

Al and Zr Porous Clay Heterostructures as Removal Agents of Basic Blue-41 Dye from an Artificially Polluted Solution: Regeneration Properties and Batch Design

et al. 2021

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The removal of Basic Blue-41 dye molecules was carried out by using two doped porous clay heterostructures by aluminum (Al) or zirconium (Zr) species. The proposed method of synthesis showed its efficiency, starting from Al or Zr intercalated hydrolyzed species, prior to its reaction with dodecylamine (C12 amine) and tetraethyl orthosilicate (TEOS) as a silica source. The intercalated precursors and their porous clay heterostructures (PCH) derivatives were characterized by different techniques. Solid NMR technique proved the presence of Al species into the intercalated silica between the clay sheets, and in addition to Si in different environments within the PCH materials. The Zr-PCH material exhibited a higher surface area and pore volume compared to its Al-PCH counterpart, with a mesoporous character for both materials. A maximum removed amount of 279 and 332 mg/g was achieved and deduced from the Langmuir equation. The regeneration tests revealed that the removal efficiency of Zr-PCH was retained after five regeneration runs, with a loss of 15% of the original value; meanwhile, the Al-PCH lost 45% of its efficiency after only three cycles. A single-stage batch design was proposed based on the Langmuir isotherm parameters. The increase of the removal capacity of Zr-PCH led to the reduction of the required amounts for the target removal of BB-41 dye compared to Al-PCH.

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Smectite Clay Nanoarchitectures: Rational Design and Applications

Nicola

Bernardo-Gusmão

Schwanke

2020

Handbook of Nanomaterials and Nanocomposites for Energy and Environmental Applications

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Progress and perspectives on pillared clays applied in energetic and environmental remediation processes

Cited by 29 publications

References 52 publications

Research Trends on Pillared Interlayered Clays (PILCs) Used as Catalysts in Environmental and Chemical Processes: Bibliometric Analysis

Research Trends on Pillared Interlayered Clays (PILCs) Used as Catalysts in Environmental and Chemical Processes: Bibliometric Analysis

Al and Zr Porous Clay Heterostructures as Removal Agents of Basic Blue-41 Dye from an Artificially Polluted Solution: Regeneration Properties and Batch Design

Smectite Clay Nanoarchitectures: Rational Design and Applications

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