Aldol condensation reaction of acetone on MgO nanoparticles surface: An in-situ drift investigation

Alminshid, Alaa H.; Abbas, Mohammed Nsaif; Alalwan, Hayder A.; Sultan, Abbas J.; Kadhom, Mohammed

doi:10.1016/j.mcat.2020.111333

Cited by 29 publications

(22 citation statements)

References 26 publications

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“…The change of the desorption peak confirmed the loading of medium-strength basic MgO. 27 Moreover, it can be easily found that the total amount of basic sites increased after loading some MgO, of which medium-strength base sites account for a large proportion. Furthermore, a similar trend phenomenon also appeared based on the NH 3 -TPD results of those samples (see Fig.…”

Section: Resultsmentioning

confidence: 68%

One-pot synthesis of biomass-derived porous carbon-based composites as an efficient acid–base bifunctional catalyst for self-condensation of n-butyraldehyde

Hou

Jia

et al. 2022

React. Chem. Eng.

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Section: Resultsmentioning

confidence: 68%

One-pot synthesis of biomass-derived porous carbon-based composites as an efficient acid–base bifunctional catalyst for self-condensation of n-butyraldehyde

Hou

Jia

et al. 2022

React. Chem. Eng.

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“…In-situ DRIFTS analysis was employed to dynamically investigate the reaction pathways of HCHO photodegradation on HAm-TiO 2−x surface. As shown in Figure 10 , the peaks at 1157 and 1200 cm −1 were identified as HCHO [ 52 , 53 ]; the peaks at 1040, 1260, 1400, and 1633 cm −1 were ascribed to carbonate species [ 54 , 55 , 56 , 57 ]; the peak at 1225 cm −1 was considered as a formate species [ 58 ], while the peak at 3390 cm −1 was considered as surface Ti-OH [ 23 ]. Observably, with the increasing irradiation time, the concentrations of all reactants, including formaldehyde, carbonate species, formate species, and surface hydroxyl groups were increased, suggesting that formaldehyde was absorbed on the HAm-TiO 2−x surface and oxidized by hydroxyl radicals into formate species and carbonate species.…”

Section: Resultsmentioning

confidence: 99%

Hydrogenated Amorphous Titania with Engineered Surface Oxygen Vacancy for Efficient Formaldehyde and Dye Removals under Visible-Light Irradiation

Feng

et al. 2022

Nanomaterials

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Hydrogenated crystalized TiO2−x with oxygen vacant (OV) doping has attracted considerable attraction, owing to its impressive photoactivity. However, amorphous TiO2, as a common allotrope of titania, is ignored as a hydrogenated templet. In this work, hydrogenated amorphous TiO2−x (HAm-TiO2−x) with engineered surface OV and high surface area (176.7 cm2 g−1) was first prepared using a unique liquid plasma hydrogenation strategy. In HAm-TiO2−x, we found that OV was energetically retained in the subsurface region; in particular, the subsurface OV-induced energy level preferred to remain under the conduction band (0.5 eV) to form a conduction band tail and deep trap states, resulting in a narrow bandgap (2.36 eV). With the benefits of abundant light absorption and efficient photocarrier transportation, HAm-TiO2−x coated glass has demonstrated superior visible-light-driven self-cleaning performances. To investigate its formaldehyde photodegradation under harsh indoor conditions, HAm-TiO2−x was used to decompose low-concentration formaldehyde (~0.6 ppm) with weak-visible light (λ = 600 nm, power density = 0.136 mW/cm2). Thus, HAm-TiO2−x achieved high quantum efficiency of 3 × 10−6 molecules/photon and photoactivity of 92.6%. The adsorption capabilities of O2 (−1.42 eV) and HCHO (−1.58 eV) in HAm-TiO2−x are both largely promoted in the presence of subsurface OV. The surface reaction pathway and formaldehyde decomposition mechanism over HAm-TiO2−x were finally clarified. This work opened a promising way to fabricate hydrogenated amorphous photocatalysts, which could contribute to visible-light-driven photocatalytic environmental applications.

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“…According to Kotnala et al (2020), the air pollution level in the New Delhi (India) areas has declined more than in comparison to other areas as a result of the lockdown. (Hadi et al, 2020b;Alalwan and Alminshid, 2020;Alminshid et al, 2021). As a result of the quarantine, people are forced to stay indoors for an extended period of time, which increases the risk of significant diseases such as lower respiratory acute infections, chronic obstructive pulmonary disease, cardiovascular disease, lung cancer, and asthma (Ansari and Ahmadi Yousefabad, 2020).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Assessment of PM2.5 Chemical Composition and Air Quality Monitoring: Implications of Air Pollutants Emissions from a Night Market in Kaohsiung City, Taiwan

Amesho

Lin

Gong

et al. 2021

Aerosol Air Qual. Res.

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There are around 300 night markets in Taiwan, and they have been drawing an increasing number of tourists in recent years. As a result, public awareness over air quality in the night markets has grown tremendously. In response to this, a specific night market in Kaohsiung City was chosen for this study in order to characterize the existing air quality in and around the night markets. In this present study, we employed an Industrial Source Complex Short-Term (ISCST3) air quality model for the simulation of PM2.5 diffusions. The model as a technique can simulate the pollutants emissions, diffusions, transportation, and pollution sources in specific areas and subsequently evaluate the influence between the source and the receiver. Therefore, we compared pollutants emissions data from several air quality monitoring stations with our sampling data of three different sampling sites in Kaohsiung City. The findings of this study showed that the average concentration of PM2.5 was in the range of 29-61 µg m -3 during opening hours of the night market, whereas the average concentration of PM2.5 range was between 22-38 µg m -3 before the night market opening hours. The concentration of metallic elements (ME) (Mg, Na, Cr, Mn, Fe, Cu, Al, Ba, Cd, Pb and Ca) was determined with the support of Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). During the night market opening hours, the result disclosed that the ME concentrations in PM 2.5 was in an increasing order as follows: Na>Fe>Al>Ca. With respect to the concentration of carbonaceous species, our results showed that the highest total carbon (TC) concentration was found to be 6.52 µg m -3 during the downwind sampling interval. The highest elemental carbon (EC) and organic carbon (OC) concentration were found to be 6.53 µg m -3 and 2.70 µg m -3 of the PM2.5 concentration, respectively. This study's findings have significant consequences for Taiwan policymakers and urban planners, particularly those responsible for coordinating environmental protection and economic development in cities. Therefore, police actions to abate urban air pollution can be attained on diverse governing echelons, resulting in synergistic effects such as a reduction in climate change impacts.

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Aldol condensation reaction of acetone on MgO nanoparticles surface: An in-situ drift investigation

Cited by 29 publications

References 26 publications

One-pot synthesis of biomass-derived porous carbon-based composites as an efficient acid–base bifunctional catalyst for self-condensation of n-butyraldehyde

One-pot synthesis of biomass-derived porous carbon-based composites as an efficient acid–base bifunctional catalyst for self-condensation of n-butyraldehyde

Hydrogenated Amorphous Titania with Engineered Surface Oxygen Vacancy for Efficient Formaldehyde and Dye Removals under Visible-Light Irradiation

Assessment of PM2.5 Chemical Composition and Air Quality Monitoring: Implications of Air Pollutants Emissions from a Night Market in Kaohsiung City, Taiwan

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