Carbon capture and conversion using metal–organic frameworks and MOF-based materials

Chemical Society Reviews, Journal Year: 2019, Volume and Issue: 48(10), P. 2783 - 2828

Published: Jan. 1, 2019

Rapidly increasing atmospheric CO2 concentrations threaten human society, the natural environment, and synergy between two. In order to ameliorate problem, carbon capture conversion techniques have been proposed. Metal-organic framework (MOF)-based materials, a relatively new class of porous materials with unique structural features, high surface areas, chemical tunability stability, extensively studied respect their applicability such techniques. Recently, it has become apparent that capabilities MOF-based significantly boost potential toward conversion. Furthermore, materials' well-defined structures greatly facilitate understanding structure-property relationships roles in this review, we provide comprehensive account significant progress design synthesis including MOFs, MOF composites derivatives, application Special emphases on capacities catalytic performances are discussed.

Language: Английский

---

Removal of heavy metal ions from wastewater: a comprehensive and critical review

npj Clean Water, Journal Year: 2021, Volume and Issue: 4(1)

Published: July 8, 2021

Abstract Removal of heavy metal ions from wastewater is prime importance for a clean environment and human health. Different reported methods were devoted to removal various sources. These could be classified into adsorption-, membrane-, chemical-, electric-, photocatalytic-based treatments. This paper comprehensively critically reviews discusses these in terms used agents/adsorbents, efficiency, operating conditions, the pros cons each method. Besides, key findings previous studies literature are summarized. Generally, it noticed that most recent have focused on adsorption techniques. The major obstacles ability remove different ion types concurrently, high retention time, cycling stability adsorbents. Even though chemical membrane practical, large-volume sludge formation post-treatment requirements vital issues need solved Fouling scaling inhibition lead further improvement separation. However, pre-treatment periodic cleaning membranes incur additional costs. Electrical-based also efficient; however, industrial-scale separation needed addition tackling issue formation. Electric- still less mature. More attention should drawn using real wastewaters rather than synthetic ones when investigating metals removal. Future research focus eco-friendly, cost-effective, sustainable materials methods.

Language: Английский

---

Well-Defined Materials for Heterogeneous Catalysis: From Nanoparticles to Isolated Single-Atom Sites

Chemical Reviews, Journal Year: 2019, Volume and Issue: 120(2), P. 623 - 682

Published: Dec. 23, 2019

The use of well-defined materials in heterogeneous catalysis will open up numerous new opportunities for the development advanced catalysts to address global challenges energy and environment. This review surveys roles nanoparticles isolated single atom sites catalytic reactions. In second section, effects size, shape, metal-support interactions are discussed nanostructured catalysts. Case studies summarized illustrate dynamics structure evolution under certain reaction conditions. third we syntheses applications atomic anchored on different types supports. final part, conclude by highlighting catalyst gaining a fundamental understanding their active sites.

Language: Английский

---

Emerging trends in porous materials for CO₂capture and conversion

Chemical Society Reviews, Journal Year: 2020, Volume and Issue: 49(13), P. 4360 - 4404

Published: Jan. 1, 2020

The presence of an excessive concentration CO2 in the atmosphere needs to be curbed with suitable measures including reduction emissions at stationary point sources such as power plants through carbon capture technologies and subsequent conversion captured into non-polluting clean fuels/chemicals using photo and/or electrocatalytic pathways. Porous materials have attracted much attention for recent past; they witnessed significant advancements their design implementation conversion. In this context, emerging trends major porous adsorbents MOFs, zeolites, POPs, carbons, mesoporous are discussed. Their surface texture chemistry, influence various other features on efficiency, selectivity, recyclability explained compared thoroughly. scientific technical advances material structure versus provide deep insights designing effective materials. review concludes a summary, which compiles key challenges field, current critical development materials, future research directions combined possible solutions realising deployment

Language: Английский

---

High-silica zeolites for adsorption of organic micro-pollutants in water treatment: A review

Water Research, Journal Year: 2018, Volume and Issue: 144, P. 145 - 161

Published: July 7, 2018

High-silica zeolites have been found to be effective adsorbents for the removal of organic micro-pollutants (OMPs) from impaired water, including various pharmaceuticals, personal care products, industrial chemicals, etc. In this review, properties and fundamentals high-silica are summarised. Recent research on mechanisms efficiencies OMP adsorption by reviewed assess potential opportunities challenges application in water treatment. It is concluded that capacities well-related surface hydrophobicity/hydrophilicity structural features, e.g. micropore volume pore size zeolites, as well OMPs. By using undesired competitive background matter (BOM) natural could potentially prevented. addition, oxidative regeneration applied on-site restore capacity OMPs prevent toxic residues re-entering environment.

Language: Английский

---

A highly stable and flexible zeolite electrolyte solid-state Li–air battery

Nature, Journal Year: 2021, Volume and Issue: 592(7855), P. 551 - 557

Published: April 21, 2021

Language: Английский

---

Ultrasmall Metal Nanoparticles Confined within Crystalline Nanoporous Materials: A Fascinating Class of Nanocatalysts

Advanced Materials, Journal Year: 2018, Volume and Issue: 31(1)

Published: Oct. 1, 2018

Crystalline nanoporous materials with uniform porous structures, such as zeolites and metal-organic frameworks (MOFs), have proven to be ideal supports encapsulate ultrasmall metal nanoparticles (MNPs) inside their void nanospaces generate high-efficiency nanocatalysts. The nanopore-encaged catalysts exhibit superior catalytic performance well high stability shape selectivity endowed by the matrix. In addition, synergistic effect of confined MNPs active sites can further promote activities composite catalysts. Herein, recent progress in nanocatalysts is reviewed, a special focus on advances synthetic strategies for (<5 nm), clusters, even single atoms within MOFs various heterogeneous reactions. some advanced characterization methods elucidate atomic-scale structures are presented, current limitations future opportunities these fantastic also highlighted discussed. aim provide guidance rational synthesis inspire applications meet emerging demands fields.

Language: Английский

---

Emerging applications of zeolites in catalysis, separation and host–guest assembly

Nature Reviews Materials, Journal Year: 2021, Volume and Issue: 6(12), P. 1156 - 1174

Published: Aug. 24, 2021

Language: Английский

---

Product Selectivity Controlled by Nanoporous Environments in Zeolite Crystals Enveloping Rhodium Nanoparticle Catalysts for CO₂ Hydrogenation

Journal of the American Chemical Society, Journal Year: 2019, Volume and Issue: 141(21), P. 8482 - 8488

Published: May 7, 2019

Supported rhodium nanoparticles (NPs) are well-known for catalyzing methanation in CO2 hydrogenation. Now we demonstrate that the selectivity this process can be optimized CO production by choice of molecular sieve crystals as supports. The NPs enveloped within with controlled nanopore environments allow tuning catalytic to minimize and favor reverse water–gas shift reaction. Pure silica MFI (S-1)-fixed exhibited maximized at high conversions, whereas aluminosilicate zeolite-supported displayed methane under equivalent conditions. Strong correlations were observed between nanoporous environment selectivity, indicating S-1 minimizes hydrogen spillover favors fast desorption limit deep Materials class appear offer appealing opportunities tailoring selective supported catalysts a variety reactions.

Language: Английский

---

Metal Sites in Zeolites: Synthesis, Characterization, and Catalysis

Chemical Reviews, Journal Year: 2022, Volume and Issue: 123(9), P. 6039 - 6106

Published: Sept. 1, 2022

Zeolites with ordered microporous systems, distinct framework topologies, good spatial nanoconfinement effects, and superior (hydro)thermal stability are an ideal scaffold for planting diverse active metal species, including single sites, clusters, nanoparticles in the framework-associated sites extra-framework positions, thus affording metal-in-zeolite catalysts outstanding activity, unique shape selectivity, enhanced recyclability processes of Brønsted acid-, Lewis metal-catalyzed reactions. Especially, thanks to advances zeolite synthesis characterization techniques recent years, zeolite-confined (denoted as metal@zeolite composites) have experienced rapid development heterogeneous catalysis, owing combination merits both intrinsic properties. In this review, we will present developments strategies incorporating tailoring zeolites advanced identification location, distribution, coordination environment species zeolites. Furthermore, catalytic applications demonstrated, emphasis on composites hydrogenation, dehydrogenation, oxidation Finally, point out current challenges future perspectives precise synthesis, atomic level identification, practical application catalyst system.

Language: Английский

---