Themed collection Nanomaterials in air

By comprehensively analyzing and discussing the application progress, environmental behavior and ecotoxicology of palladium-based nanomaterials (Pd-NMs), guidelines are provided for the sustainable development of Pd-NMs.

Organic pollutants from synthetic organic compounds (SOCs) and oil spills have led to significant water contamination. This article review the progress of oil–water separation using nanotechnology and the concern of water contamination by nanomaterials.

Review of recent advances in nanomaterial genotoxicity and carcinogenicity with a focus on lung carcinogenicity of high aspect ratio carbon nanotubes.

This review highlights the characteristics of adsorption and desorption of aromatic VOCs on various PCAs as well as the integrated technologies for emission control and resource recovery of industrial VOC exhaust.

Nanoparticles containing metals in their structure constitute an increasingly large group of substances present in the air.

Design and engineering of metal–organic frameworks for the adsorption/degradation of inorganic toxic gases, organic vapors and particulate matter.

Various membrane models used to study nanoparticle interactions with the cell plasma membrane.

One of the main concerns regarding nanomaterials is the cytotoxicity caused by engineered nanoparticles (NPs) after inhalation, oral or dermal routes of exposure, intravenous application, and delivery as debris from implants.

An overview of the strategies for boosting C₂₊ selectivity by manipulating CO*(CO).

Surface modified nano-catalysts to improve the performance of photocatalytic degradation of VOC.

In this review, the impact of the structure dimensionality and surface morphologies of WO₃ for efficient detection of gases such as H₂, NH₃, H₂S, CO, O₃, VOCs etc. along with the influence of surface functionalization and doping has been discussed.

This work discussed the structure–activity relationship of metal/CeO₂ catalysts, emphasized the theoretical calculation for catalytic mechanism insight and guiding the design of high-efficiency metal/CeO₂ catalysts for air pollution control.

This review highlights recent and important advances related to the structure properties and application of graphdiyne (GDY)-based nanocomposites for environmental remediation.

The necessity, basic strategies and mechanisms for HCHO room-temperature catalytic oxidation removal are summarized and discussed.

Engineered nanomaterials (ENM) have a potential to modulate microbiota and induce harmful or beneficial effects in the host. However, the causal factors of ENM-induced dysbiosis remain unknown.

Metal–organic frameworks (MOFs) are well known for their versatile applications in diverse fields (e.g., gas adsorption, water purification, sensing, drug delivery, and catalysis).

Metabolites present in the corona may play a key role in biological recognition of nanomaterials yet remain a much-overlooked aspect of the corona.

Photocatalysis that utilizes semiconductor nanoparticles is one of the promising environmental technology for air purification.

Materials with different dimensions can exhibit markedly different responses to their environment, even for the same material composition.

Environmental transformations of natural and engineered carbon nanoparticles significantly affect their fate, transport, and interactions with organic contaminants.

We offer a comprehensive overview for the design concepts and latest progresses on the intelligent environmental nanomaterials.

Bacterial infections of the pulmonary system are increasing.

This critical review identifies nanoceria's pharmacokinetics and adverse effects, discloses uncertainties and unknowns, and makes recommendations to address research gaps.

This review gives an overview of the applications of BiOX (X = Cl, Br and I) photocatalysts for environmental remediation.

Direct deposition of nano-dry-salt on nonwovens was developed as a process that can be incorporated into conventional nonwoven production for timely application of biosafe anticoronaviral surfaces and reliable aerosol filtration performance.

Ageing process remarkably alters the toxicity of carbon black particles towards susceptible cells via changing the species of their surface oxygen groups.

RGO-functionalized polymer nanofibrous membrane is developed through an electrospinning technique, which exhibits the exceptional surface activity and ultra-low airflow resistance for PM_2.5 filtration.

Analysis of exhaled breath condensate (EBC) represents a non-invasive method for detecting inhaled nanoparticles (NPs) associated with various occupational and environmental exposures.

This study firstly revealed that toluene oxidation activity can be considerably improved by cationic defects rather than oxygen defects over nano-structured CoMnO_x.

A Au@Co₃O₄ core–shell nanocomposite was prepared for the mineralization of formaldehyde under dark conditions and visible-light irradiation. The Au@Co₃O₄ core–shell nanocomposite has significantly promoted the photocatalytic formaldehyde oxidation.

Catalytic activity, water resistance and stability of hematite nanomaterials in oxidative removal of polychlorinated aromatic hydrocarbons can be simultaneously enhanced through facet engineering.

Raspberry-like hollow spheres consisting of small TiO₂ nanocrystals exhibited excellent photocatalytic activity for the removal of nitrogen oxides.

Light illumination can enhance the NOC formation from heterogeneous processes of toluene whereas water cannot.

Mineral dust aerosols in snow were analyzed by single particle ICP-MS with machine learning to classify particle groups.

NO₂ played an important positive or negative role in SO₂ heterogeneous reactions, however, NH₃ always exerted significant positive impacts on SO₂ heterogeneous reactions in the three reaction systems of SO₂–MgO-dark, SO₂–MgO-hν and SO₂–MgO–O₃.

Cu-ZSM-5-IE+CP exhibited excellent catalytic performance as a result of the synergistic effect between CuO and Cu²⁺ species.

A ducted GPEC reactor equipped with defective WO₃/TiO₂ nanotube photoelectrodes was developed for VOC removal. Applying a tiny bias voltage promoted rapid carrier transfer and inhibited the recombination of carriers trapped by the bulk OVs.

SO₂-Tolerant catalytic reduction of NO_x was demonstrated by confining active species in TiO₂ nanotubes.

A photodynamic GO@MIL-101 adsorbent was presented by growing several isolated MIL-101 nanoparticles onto GO nanosheets, which was able to realize the complete desorption of VOCs within 60 min under UV-vis-NIR light irradiation.

The relationship between PM_2.5 compositions and neuron toxicity was explored and Al³⁺ was revealed to be antagonistic to other pollutants by decreasing the combined toxic effects.

The molecular hierarchical synergistic effects of toluene photooxidation are elucidated to explain the formation mechanism of secondary organic aerosols.

Pd⁰ and N vacancy co-modified g-C₃N₄ displayed excellent NO-removal activity.

Urban rain and runoff are potential sources of anthropogenic nanomaterials (engineered and incidental, ENMs and INMs) to receiving waterbodies.

Fe₃Mn₃O₈ with controllable oxygen vacancies for superior catalytic oxidation of formaldehyde.

Inhalation of PbO nanoparticles in mice has adverse effects on immune response, oxidative stress, antioxidative defense, kidneys, intestine and bones.

Remarkably high levels of magnetite nanoparticle pollution derived from traffic in the roadside environment represent a significant health risk factor.

An ECL biosensor based on entropy-driven amplification and CRISPR-Cas12a shear for the detection of the SARS-CoV-2 RdRp gene in environmental surveillance was reported.

Three-dimensional interconnected N-doped Ti₃C₂T_x hollow spherical shells with abundant accessible space exhibit excellent capacitive deionization performance in asymmetric electrode systems.

EPFRs can improve ˙OH generation via the h⁺ oxidation. This is because EPFRs construct a built-in electric field to help the migration of h⁺ from anatase to EPFRs. Meanwhile, EPFRs help anatase adsorb more H₂O molecules, which are the source of ˙OH.

Microbial response to copper oxide nanoparticles in soils is controlled by land use rather than copper fate.

An atomically dispersed Pd site catalyst with 0.04 wt% Pd loading amount has been prepared for catalytic combustion of typical gaseous VOCs with high catalytic activity and stability.

A super hygroscopic material with functionalities of humidity capture, in situ liquefaction, and fast water release triggered by natural sunlight, has been prepared, providing a good strategy for next-generation atmospheric water generators.

An efficient biocidal paint is prepared. Antibacterial activity is provided by silver nanoparticles (AgNPs) nucleated on a bio-based substrate (cellulose nanocrystals, CNCs), dispersed in an amount as low as possible in aqueous suspension.

We combined both theoretical and experimental evidence to demonstrate a “seesaw effect” between reducibility and hydrophobicity after introduction of cobalt into the OMS-2 structure.

Schematic illustration of the sandwich-structured membrane with long-term antifouling performance for personal protection.

The developed Au-NR based gas sensor showed up to ∼1.7 times higher response magnitude than its Au CTRL counterpart when exposed toward elemental mercury (Hg⁰) vapor. Furthermore, the newly developed sensor also showed good selectivity toward Hg⁰.

This work synthesized a highly dispersed Co–Fe bimetallic catalyst with uncalcined SBA-15 as the support, which was very efficient for PMS activation and gaseous toluene degradation in the wet scrubbing waste gas treatment system.

Compared with that of WO₃-monoclinic (W-m), the special open structure of WO₃-hexagonal (W-h) facilitates the interaction between W-h and Ce as well as improves the acidity and redox properties of Ce–W-h, reflecting its excellent NH₃-SCR activity.

UV-induced photodegradation posed greater cytotoxicity, as clearly evidenced by the impaired cell viability, stronger oxidative stress, serious membrane damage, intensive mitochondrial dysfunction, and the altered transcriptome responses.

A Z-scheme Au–TiO₂@NH₂-UiO-66 photocatalyst with ultrafine Au as electron mediator was synthesized, which exhibited an exceptionally high mineralization efficiency of 85% at 94.6% ethyl acetate removal under visible light irradiation.

PM_2.5 activated the NLRP3 inflammasome to release ASC specks and interact with the Aβ monomer to induce Aβ aggregation, further inducing AD.

We examined goldfish immunotoxicological responses to intravenously injected PAA-TiO₂ NPs by determining organ accumulation, depuration, tissue damage, and immune responsiveness in the kidneys, spleen, and isolated primary kidney neutrophils.

Bi₂Sn₂O_7−x with Sn-/Bi-adjacent oxygen vacancy were designed and applied for photocatalytic removal of rarefied NO. DFT and experiments provided a straightforward and clear understanding of the structure-performance relationship of oxygen vacancies.

g-C₃N₄/TiO₂ foams were explored as photocatalytic filters for treating NO indoor gas owing to the abundant adsorption and activation sites.

Sub-micron aerosol filtration of non-woven materials and fabric treatments were investigated. Select low-cost, readily available and easily cut non-woven materials were identified as suitable filter inserts for cloth-based masks.

For ozone decomposition, ultrathin δ-MnO₂ nanosheets were synthesized and the properties of oxygen vacancies were regulated. The as-synthesized catalyst exhibited superior activity.

There is a morphological dependence between the oxygen vacancies and the piezocatalytic activity of the two-dimensional Bi₂WO₆ piezocatalyst.

Cellulose–chitosan composite aerogel fabricated via a process of co-dissolution and regeneration can adsorb formaldehyde quickly and irreversibly from air.

AgNP toxicity was attributed to dissolved Ag⁺, which was released, transported, and concentrated in the mitochondria, finally leading to exhaustion of the reserve respiratory capacity and cell death.

Protection from particulate matter (PM₁₀ and PM_2.5) and microorganisms using MOFs (metal–organic frameworks) and nanoparticles used in filtration has been a major challenge.