The exploration of metal-free catalyst g-C3N4 for NO degradation

Ren, Yuehong; Han, Qi; Zhao, Yuehong; Wen, Hao; Jiang, Zhaotan

doi:10.1016/j.jhazmat.2020.124153

Cited by 26 publications

(8 citation statements)

References 60 publications

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“…In order to overcome major intracellular-injury obstacles for cryopreserved cells and tissues, understanding the underlying intracellular ice-formation mechanism and controlling intracellular ice via experiment and theory analysis have attracted tremendous attention in the past decades. [51][52][53][54] With respect to intracellular ice formation, the main theories that elucidate the intracellular formation mechanisms include pore theory, surfacecatalyzed nucleation (SCN) theory, volume-catalyzed nucleation (VCN) theory, and cell membrane damage theory. [52,55,56,213] In addition to these theories, numerous experimental data have demonstrated that intracellular ice is affected by many factors, such as cooling rates, permeability to water, intracellular supercooling, the integrity of cell membranes, and extracellular ice.…”

Section: Fundamental Ice Injury During Cryopreservationmentioning

confidence: 99%

Ice Inhibition for Cryopreservation: Materials, Strategies, and Challenges

2021

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Cryopreservation technology has developed into a fundamental and important supporting method for biomedical applications such as cell‐based therapeutics, tissue engineering, assisted reproduction, and vaccine storage. The formation, growth, and recrystallization of ice crystals are the major limitations in cell/tissue/organ cryopreservation, and cause fatal cryoinjury to cryopreserved biological samples. Flourishing anti‐icing materials and strategies can effectively regulate and suppress ice crystals, thus reducing ice damage and promoting cryopreservation efficiency. This review first describes the basic ice cryodamage mechanisms in the cryopreservation process. The recent development of chemical ice‐inhibition molecules, including cryoprotectant, antifreeze protein, synthetic polymer, nanomaterial, and hydrogel, and their applications in cryopreservation are summarized. The advanced engineering strategies, including trehalose delivery, cell encapsulation, and bioinspired structure design for ice inhibition, are further discussed. Furthermore, external physical field technologies used for inhibiting ice crystals in both the cooling and thawing processes are systematically reviewed. Finally, the current challenges and future perspectives in the field of ice inhibition for high‐efficiency cryopreservation are proposed.

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Section: Fundamental Ice Injury During Cryopreservationmentioning

confidence: 99%

Ice Inhibition for Cryopreservation: Materials, Strategies, and Challenges

2021

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“…Among a variety of popular metal choices, gold as a plasmonic noble metal with surface plasmon resonance (SPR) effect, is the key for the photocatalytic activity enhancement of the heterostructure composites. The theory behind is that the enhanced localized electromagnetic elds and the SPR-induced plasmonic hot electrons are responsible for the enhanced interfacial charge carrier separation at the close contact of metal and semiconductor [31][32][33]. And by eliminating the potential interfacial charge transport barrier commonly encountered in type II heterostructure composites via Z-scheme heterostructure construction, improvement in charge separation e ciency and photocatalytic activity of these Au nanoparticles incorporated g-C 3 N 4 based Z-scheme composite catalyst can be achieved.…”

Section: Introductionmentioning

confidence: 99%

“…Attention has been paid to the photocatalytic removal of NO (one of the most hazardous constituents in the NO x gases family) and benzene-to-phenol conversion utilzing semiconducting catalysts in recent years, due to the high potentials of semiconductor catalysts in photocatalytic energy conversion and pollutants treatment applications [31,34]. Hydroxylated aromatic compounds (e.g., phenol) are often used as precursors or intermediates for the fabrication of plastic resins, dyes, and bers in commercial and industrial scale.…”

Section: Introductionmentioning

confidence: 99%

“…It is thus imperative to develop more environmental-friendly alternative methodologies for benzene production. Solar energy conversion utilizing low-loading noble metal (Au in this case) modi ed carbon-based photocatalysts has been given special attention, because of the extremely high catalytic activity of Au and also due to the fact that the high chemical/thermal stability as well as the large surface area makes layered g-C 3 N 4 a compelling base material for visible-light-driven benzene/NO x oxidation [31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

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Au Clusters Enhanced Charge Separation and Transfer in WOx/g-C3N4 Heterojunctions for Efficient NOx and Benzene Conversion

Zhang

Matras-Postołek

Yang

2022

Preprint

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Topics on effectively improving the photochemical CO2/benzene/NO oxidation conversion performances of g-C3N4 based materials via charge transfer and separation enhancement are still considered challenging, despite the growing popularity of applying these materials in a variety of energy conversion related applications. WOx/Au-g-C3N4 heterojunctions are synthesized using two-step thermal polymerization and solvothermal treatment methods in this paper. Small Au nanoparticles are firstly incorporated in superior thin g-C3N4 via mechano-chemical pre-reaction and two-step thermal polymerization (treated at 500 and 700°C). Enhanced photocurrent density is observed after incorporated with Au, which is also in good agreement with the photocatalytic activity (H2 generation and CO2 reduction) data. Layered WOx with abundant oxygen vacancies are further incorporated into Au-modified g-C3N4 nanosheets to form heterojunctions possessing excellent photocatalytic CO2 photo-reduction performances with CO and CH4 generation rate of 5.64 and 2.58 µmolg− 1h− 1, respectively, under full solar spectrum. The heterojunctions constructed via in-situ formation show direct Z-scheme charge transfer pathway with improved charge separation and transport efficiencies. These highly stable and recyclable hierarchical g-C3N4 hybrid nanostructures (WOx/Au/g-C3N4 heterojunctions) show outstanding conversion rate (88.1%) and selectivity (99.3%) for benzene to phenol conversion under full solar spectrum condition, as well as excellent NO removal rate (61%).

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“…Graphite carbon nitride (GÀ CN) is an ordered two-dimensional (2D) semiconductor material with adjustable structure, suitable band gap, [1,2] high thermal stability, [3,4] easy synthesis and low cost. [5,6] At present, it has been applied in photoelectric catalysts, [7] such as water decomposition, [8] organic pollutant degradation [9] and carbon dioxide reduction. [10] Previous work has proved its great potential in solar energy conversion systems.…”

Section: Introductionmentioning

confidence: 99%

In‐situ Construction of Ultra‐Thin Graphitic Carbon Nitride Supported Lanthanum Oxide Nanosheet Heterostructures with Enhanced Photocatalytic Hydrogen Evolution Activity

Liu

Zhang

et al. 2021

ChemPhotoChem

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The preparation of ultra-thin graphitic carbon nitride has always been a difficult challenge. Herein, the heterostructure of ultrathin graphite carbon nitride (UGÀ CN) supported lanthanum oxide nanosheets was constructed in situ by the strategy of one-step calcination and annealing (2D/2D). The thicknesses of UGÀ CN and LaO were about 2.3 nm and 2.9 nm, respectively. The two types of nanosheets are cross-stacked with each other, and the strong affinity between atoms leads to the formation of an ultra-thin 2D/2D hybrid nanomaterial, which has close interface contacts. The strong electron interaction and effective charge separation cause electrons to flow from UGÀ CN to LaO, then to flow to the Pt promoter to catalyze the H 2 generation reaction. In addition, experimental studies have found that the formation of the ultra-thin 2D/2D structure is mainly caused by the intercalation of lanthanum nitrate in the lamellar structure and the synergistic effect of the combustion-supporting NO 3À accelerating the thermal condensation of melamine during heating. Importantly, the photocatalytic hydrogen evolution rate of LaO/UGÀ CN reaches 104.1 μmol h À 1 , which about 12.2 times greater than that of pristine GÀ CN (8.5 μmol h À 1 ). This work is of significance for the preparation of ultra-thin graphite carbon nitride in a simple way and the understanding of the corresponding formation mechanism for the composite material.

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The exploration of metal-free catalyst g-C3N4 for NO degradation

Cited by 26 publications

References 60 publications

Ice Inhibition for Cryopreservation: Materials, Strategies, and Challenges

Ice Inhibition for Cryopreservation: Materials, Strategies, and Challenges

Au Clusters Enhanced Charge Separation and Transfer in WOx/g-C3N4 Heterojunctions for Efficient NOx and Benzene Conversion

In‐situ Construction of Ultra‐Thin Graphitic Carbon Nitride Supported Lanthanum Oxide Nanosheet Heterostructures with Enhanced Photocatalytic Hydrogen Evolution Activity

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