Catalytic performance and mechanism of bismuth molybdate nanosheets decorated with platinum nanoparticles for formaldehyde decomposition at room temperature

Qin, Lifan; Huang, Shengnan; Cheng, Hefa

doi:10.1016/j.jcis.2022.11.110

Cited by 20 publications

(5 citation statements)

References 81 publications

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“…Cheng et al examined the RH effect on the catalytic activity in HCHO oxidation over the Pt/Bi 2 MoO 6 catalyst. 144 The catalyst performed well in a moderate RH of 25−55%, while the removal efficiency was drastically decreased at the levels of 5−15% and 65−100% (Figure 8a). They considered that an appropriate H 2 O addition could react with surface oxygen species to form hydroxyls to facilitate HCHO oxidation, but competitive adsorption of excessive H 2 O with HCHO on active sites would take place, causing a decrease of the catalytic performance.…”

Section: Effects Of the Relative Humidity (Rh)mentioning

confidence: 97%

Section: Influence Factors For the Catalytic Performance Of Hcho Oxid...mentioning

confidence: 99%

“…Because water vapor inevitably exists in a realistic environment, it is an essential project to measure the moisture tolerance capacity of a catalyst for the practical oxidation of HCHO at room temperature. Cheng et al examined the RH effect on the catalytic activity in HCHO oxidation over the Pt/Bi 2 MoO 6 catalyst . The catalyst performed well in a moderate RH of 25–55%, while the removal efficiency was drastically decreased at the levels of 5–15% and 65–100% (Figure a).…”

Section: Influence Factors For the Catalytic Performance Of Hcho Oxid...mentioning

confidence: 99%

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Noble-Metal-Based Catalysts on a Scale from Nanoparticles to Subnanoclusters and Single Atoms for Formaldehyde Oxidation at Room Temperature: A Review

Sun,

Wang,

Cui

et al. 2024

ACS Appl. Nano Mater.

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As an extremely toxic pollutant, formaldehyde (HCHO) is a risk to human health. Catalytic oxidation with noble-metal-based catalysts is considered to be the most effective and promising strategy for HCHO removal at room temperature. Unfortunately, it usually exhibits high cost. In this review, we aim to establish comprehensive viewpoints for noble-metal-based catalysts including platinum (Pt), palladium (Pd), rhodium (Rh), iridium (Ir), and gold (Au) using in ambient-temperature HCHO oxidation. Because the catalytic performance highly depends on the metal particle size for supported catalysts, we summarize the recent significant progress focusing on metal species with dispersions from nanoparticles to subnanoclusters and single atoms, which can yield atomic-level insight and enhance the utilization efficiency of metal atoms. First, the impacts of the noble-metal species status as well as their support properties are summarized. Relative humidity as a critical impact factor for catalytic activity during HCHO oxidation is also discussed. Then, the reaction mechanisms in terms of typical intermediates and reaction pathways are demonstrated. Importantly, the emerging combination method of adsorption and oxidation for the tandem elimination of HCHO is briefly introduced and discussed. Finally, the perspective on the challenges and opportunities to design highly efficient but low-cost noble-metal-based catalysts is put forward in combination with the process optimization technologies.

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Section: Effects Of the Relative Humidity (Rh)mentioning

confidence: 97%

Section: Influence Factors For the Catalytic Performance Of Hcho Oxid...mentioning

confidence: 99%

Section: Influence Factors For the Catalytic Performance Of Hcho Oxid...mentioning

confidence: 99%

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Noble-Metal-Based Catalysts on a Scale from Nanoparticles to Subnanoclusters and Single Atoms for Formaldehyde Oxidation at Room Temperature: A Review

Sun,

Wang,

Cui

et al. 2024

ACS Appl. Nano Mater.

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“…The appearance of bands at 1729-1630 cm − 1 and 1550 − 1381 cm − 1 can be assigned to COO − and CO 3 2− species, respectively [51]. The strong bands at 1100-976 cm − 1 can be ascribed to CO of dioxymethylene (DOM) species [52]. A gradual increase in the broad band at 3665-3277 cm − 1 was observed over time, indicating -OH groups of methylol adducts (on amino groups) and/or generated H 2 O molecules.…”

Section: The Reactive Adsorption Mechanism For Formaldehydementioning

confidence: 99%

Nanodisk–like activated carbon-branched polyamine for adsorption and degradation of gaseous formaldehyde

Ahmadi,

Kim,

2024

Carbon

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“…Adding certain precious metals to the oxides can enhance their optical, catalytic, and sensing properties. In recent decades, several metal molybdates with various shapes and characteristics have been documented [22]. Molybdates are compounds containing molybdenum oxy anions in which molybdenum has the formal oxidation number of +6.…”

Section: Introductionmentioning

confidence: 99%

Microwave-Assisted Synthesis of Flower-like MnMoO4 Nanostructures and Their Photocatalytic Performance

Selvamani,

Kesavan,

Arulraj

et al. 2024

Materials

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This article describes an affordable method for the synthesis of MnMoO4 nanoflowers through the microwave synthesis approach. By manipulating the reaction parameters like solvent, pH, microwave power, and irradiation duration along this pathway, various nanostructures can be acquired. The synthesized nanoflowers were analyzed by using a powder X-ray diffractometer (XRD), field emission scanning electron microscopy (FE-SEM) with energy dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FT-IR), and UV–vis diffuse reflectance spectroscopy (UV–DRS) to determine their crystalline nature, morphological and functional group, and optical properties, respectively. X-ray photoelectron spectroscopy (XPS) was performed for the examination of elemental composition and chemical states by qualitative and quantitative analysis. The results of the investigations demonstrated that the MnMoO4 nanostructures with good crystallinity and distinct shape were formed successfully. The synthesized MnMoO4 nanoflowers were tested for their efficiency as a photocatalyst in the degradation studies of methylene blue (MB) as model organic contaminants in an aqueous medium under visible light, which showed their photocatalytic activity with a degradation of 85%. Through the band position calculations using the electronegative value of MnMoO4, the photocatalytic mechanism of the nanostructures was proposed. The results indicated that the effective charge separation, and transfer mechanisms, in addition to the flower-like shape, were responsible for the photocatalytic performance. The stability of the recovered photocatalyst was examined through its recyclability in the degradation of MB. Leveraging MnMoO4’s photocatalytic properties, future studies may focus on scaling up these processes for practical and large-scale environmental remediation.

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Catalytic performance and mechanism of bismuth molybdate nanosheets decorated with platinum nanoparticles for formaldehyde decomposition at room temperature

Cited by 20 publications

References 81 publications

Noble-Metal-Based Catalysts on a Scale from Nanoparticles to Subnanoclusters and Single Atoms for Formaldehyde Oxidation at Room Temperature: A Review

Noble-Metal-Based Catalysts on a Scale from Nanoparticles to Subnanoclusters and Single Atoms for Formaldehyde Oxidation at Room Temperature: A Review

Nanodisk–like activated carbon-branched polyamine for adsorption and degradation of gaseous formaldehyde

Microwave-Assisted Synthesis of Flower-like MnMoO4 Nanostructures and Their Photocatalytic Performance

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