Sulfur dioxide and nitrogen dioxide adsorption on zinc oxide and zirconium hydroxide nanoparticles and the effect on photoluminescence

Singh, Jagdeep; Mukherjee, Anupama; Sengupta, Sandip; Im, Jisun; Peterson, Gregory W.; Whitten, James E.

doi:10.1016/j.apsusc.2012.02.093

Cited by 43 publications

(35 citation statements)

References 16 publications

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“…3(a)) consisted of two peaks at binding energies of 530.3 and 531.8 eV, which were assigned to typical wurtzite ZnO and OH groups, respectively. [13][14][15][16][17][18] The inset shows the OH group ratios in the O 1s spectrum at escape angles of 45…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Effects of Thermal Pressing on ZnO Nanoparticle Layers Deposited by Drop Casting

Yoshida

Shinohara

Itohara

et al. 2016

e-J. Surf. Sci. Nanotech.

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ZnO nanoparticle (NP) layers were formed using a simple drop casting process. Applying thermal pressing clearly improved the surface morphology and electrical properties of the as-deposited ZnO NP layers as well as significantly enhanced the transistor characteristics of the NP layers. The effects of thermal pressing on the film surface properties were evaluated by X-ray photoelectron spectroscopy, Kelvin probe microscopy, and photoluminescence spectroscopy. Results suggest that thermal pressing improved the transistor characteristics by decreasing NP surface defects such as oxygen vacancies.

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Section: Resultsmentioning

confidence: 99%

“…3(b)) and is in agreement with previous reports. [13,15,[17][18][19] The proportions of chemical components including the OH group ratios did not change after thermal pressing (Figs. 3(c) and 3(d)); however, the O 1s (ZnO) and Zn 2p 3/2 peak positions shifted to higher energies by 0.15 eV.…”

Section: Resultsmentioning

confidence: 99%

Effects of Thermal Pressing on ZnO Nanoparticle Layers Deposited by Drop Casting

Yoshida

Shinohara

Itohara

et al. 2016

e-J. Surf. Sci. Nanotech.

View full text Add to dashboard Cite

show abstract

“…Figure 1 shows the schematic diagram of the CGS-1TP gas sensing analysis system [15]. In this study, gas response of the sensor to SF 6 partial discharge decomposition byproduct SO 2 was defined as = / [19,20], where denotes the resistance value of the sensor in pure N 2 and in certain concentration of target gas mixed with pure N 2 . The response and recovery time were defined as the time required by the sensor to achieve 90% of the total resistance change in the case of gas adsorption or gas desorption [21,22].…”

Section: Methodsmentioning

confidence: 99%

Hydrothermal Synthesis and Responsive Characteristics of Hierarchical Zinc Oxide Nanoflowers to Sulfur Dioxide

Zhou

Xie

Jin

et al. 2016

Journal of Nanotechnology

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Sulfur dioxide, SO2, is one of the most important decomposition byproducts of sulfur hexafluoride, SF6, under partial discharge in GIS apparatus. The sensing performances of semiconductor gas sensors can be improved by morphology tailoring. This paper reported the synthesis method, structural characterization, and SO2responsive characteristics of hierarchical flower-shaped ZnO nanostructures. Hierarchical ZnO nanoflowers were successfully prepared via a facile and simple hydrothermal method and characterized by X-ray powder diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy, respectively. Planar chemical gas sensor was fabricated and its responsive characteristics towards SO2were systematically performed. The optimum operating temperature of the fabricated sensor was measured to be about 260°C, and the corresponding maximum responses were 16.72 and 26.14 to 30 and 60 ppm of SO2. Its saturated gas concentration was 2000 ppm with a response value of 67.41. Moreover, a quick response and recovery feature (7 s and 8 s versus 80 ppm of SO2) and good stability were also observed. All results indicate that the proposed sensor is a promising candidate for detecting SF6decomposition byproduct SO2.

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“…Understanding the exposure levels and penetration levels of ultrafine particles through N95 masks, however, are critically important because recent laboratory studies have demonstrated cytotoxicity of silica nanoparticles on lung epithelial cells [ 21 ]. Furthermore, because nanoparticles have a much greater surface area [ 22 ], they can adsorb airborne NO 2 , SO 2 , and other pollutants [ 23 ] released from machines on construction jobsites.…”

Section: Introductionmentioning

confidence: 99%

Field Evaluation of N95 Filtering Facepiece Respirators on Construction Jobsites for Protection against Airborne Ultrafine Particles

Adhikari

Mitra

Rashidi

et al. 2018

IJERPH

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Exposure to high concentrations of airborne ultrafine particles in construction jobsites may play an important role in the adverse health effects among construction workers, therefore adequate respiratory protection is required. The performance of particulate respirators has never been evaluated in field conditions against ultrafine particles on construction jobsites. In this study, respiratory protection levels against ultrafine particles of different size ranges were assessed during three common construction related jobs using a manikin-based set-up at 85 L/min air flow rate. Two NanoScan SMPS nanoparticle counters were utilized for measuring ultrafine particles in two sampling lines of the test filtering facepiece respirator—one from inside the respirator and one from outside the respirator. Particle size distributions were characterized using the NanoScan data collected from outside of the respirator. Two models of N95 respirators were tested—foldable and pleated. Collected data indicate that penetration of all categories of ultrafine particles can exceed 5% and smaller ultrafine particles of <36.5 nm size generally penetrated least. Foldable N95 filtering facepiece respirators were found to be less efficient than pleated N95 respirators in filtering nanoparticles mostly at the soil moving site and the wooden building frameworks construction site. Upon charge neutralization by isopropanol treatment, the ultrafine particles of larger sizes penetrated more compared to particles of smaller sizes. Our findings, therefore, indicate that N95 filtering facepiece respirators may not provide desirable 95% protection for most categories of ultrafine particles and generally, 95% protection is achievable for smaller particles of 11.5 to 20.5 nm sizes. We also conclude that foldable N95 respirators are less efficient than pleated N95 respirators in filtering ultrafine particles, mostly in the soil moving site and the wooden building framework construction site.

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Sulfur dioxide and nitrogen dioxide adsorption on zinc oxide and zirconium hydroxide nanoparticles and the effect on photoluminescence

Cited by 43 publications

References 16 publications

Effects of Thermal Pressing on ZnO Nanoparticle Layers Deposited by Drop Casting

Effects of Thermal Pressing on ZnO Nanoparticle Layers Deposited by Drop Casting

Hydrothermal Synthesis and Responsive Characteristics of Hierarchical Zinc Oxide Nanoflowers to Sulfur Dioxide

Field Evaluation of N95 Filtering Facepiece Respirators on Construction Jobsites for Protection against Airborne Ultrafine Particles

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