Surface adhesion study of La2O3 thin film on Si and glass substrate for micro-flexography printing

Hassan, Suhaimi; Yusof, Mohd Faiz Mohamed; Embong, Zaidi; Maksud, M. I.

doi:10.1063/1.4972930

Cited by 4 publications

(6 citation statements)

References 12 publications

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“…La 3d5/2 spectrum could be deconvoluted into two peaks at 836.3 and 839.8 eV, while 3d3/2 spectrum into two peaks at 853.0 and 856.6 eV. This indicates the existence of both La(OH) 3 and La 2 O 3 on La-ACO (Hassan et al, 2017). The results presented in this section con rm the successful impregnation of lanthanum onto ACO.…”

Section: 2016asupporting

confidence: 63%

Activation of persulfate by lanthanum modified activated coke for tetracycline degradation

Zhang

Chen

et al. 2022

Preprint

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Activated coke (ACO) has been applied in some wastewater treatment plants to advance the removal of micro-pollutants from secondary effluent. This work investigated the use of Lanthanum (La) to modify ACO (La-ACO) for enhancing the removal/degradation of micro-pollutants by activating peroxydisulfate (PDS). We report that the immobilization of La oxide on ACO significantly enhances the adsorption of tetracycline (TC) from aqueous solution as well as its persulfate-based catalytic oxidation. The pseudo-first-order Kapp value of the La-ACO/PDS process is 1.41 times that of adsorption and PDS oxidation alone, indicating an evident synergistic effect. Surface analysis confirms the introduction of La on ACO, while both La(OH)3 and La2O3 consist of La species on La-ACO. The pH values close to neutral are shown to improve the degradation of TC. Also, increasing reaction temperature improves the TC oxidation. The oxidizing species superoxide anion radical (O2·−) and active holes (h+) prove the predominant oxidizing species, while the contribution percentages of O2·− and h+ achieve 51.3% and 84.2% of the total degradation capacity, respectively. The inhibiting effect of SO42− and Cl− is insignificant, while the coexisting humic acid has actually improved the TC removal. Reusability test indicates the stable and continuable PDS catalytic ability.

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Section: 2016asupporting

confidence: 63%

Activation of persulfate by lanthanum modified activated coke for tetracycline degradation

Zhang

Chen

et al. 2022

Preprint

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“…The results were consistent with the contact angles stated in Figure S1. 5a confirmed that the inorganic substance was La 2 O 3 rather than other materials, 45 which also demonstrated that the La 2 O 3 was composited with polyurethane successfully.…”

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 70%

“…Additionally, the high-resolution C 1s XPS spectra shown in Figure b was deconvoluted into five components with binding energies at 291.9 eV (CF 2 ), 294.2 eV (CF 3 ), 290.5 eV (CO), 285.8 eV (C–N/C–O), and 284.1 eV (C–C/C–H), which further confirmed that the fluorinated hyperbranched polyurethane was synthesized successfully. Figure c depicts the high-resolution O 1s spectra that was deconvoluted into two components at 532.5 eV (O 2– ) and 534.39 eV (OH – ); the existence of O 2– , La 3d 5/2 , and La 3d 3/2 on the right side of Figure a confirmed that the inorganic substance was La 2 O 3 rather than other materials, which also demonstrated that the La 2 O 3 was composited with polyurethane successfully.…”

Section: Resultsmentioning

confidence: 89%

Novel Robust Superhydrophobic Coating with Self-Cleaning Properties in Air and Oil Based on Rare Earth Metal Oxide

Xiao

Deng

Zeng

et al. 2017

Ind. Eng. Chem. Res.

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Herein, a simple spraying method was applied to prepare a novel robust superhydrophobic coating containing fluorinated hyperbranched polyurethane (F-HPU) resin and lanthanum oxide (La 2 O 3 ). The composite coating had the maximum water contact angle (WCA) of 157°a nd low sliding angle (SA) of 5.5°when the content of La 2 O 3 was 17%. Moreover, the composite coating can resist abrasion with sand paper for 80 cycles, which might be the reason that La 2 O 3 particles adhered strongly on the substrate by the F-HPU resin with strong adhesion. Furthermore, the novel robust superhydrophobic coating can be applied in various substrates, resist water stream impact, and remain clean after being fouled by contamination in air and oil. Accordingly, the novel robust superhydrophobic coating has potential application in protection-needed materials. Meanwhile, we also provide a new application field for rare earth metal oxides and an alternative strategy for robust self-cleaning coatings.

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“…10,11 The binding energy position of 835.9 eV and 852.3 eV are attributed to La 2 O 3 species and the binding energy position at 838.6 eV and 855.4 eV are attributed to La(OH) 3 species. 15 Figure 4b shows the de-convolution of the O 1 s photoelectron spectrum that shows oxygen species peaks at 531 eV in La 2 O 3 . 15 The elemental XPS data confirms the presence of La 2 O 3 species.…”

Section: Resultsmentioning

confidence: 99%

A La₂O₃-NPs/ZnO/MEMS SO₂ Gas Sensor

Hsueh

Lee

2021

J. Electrochem. Soc.

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This study uses the structure of a MEMS gas sensor to fabricate a La2O3-NPs/ZnO/MEMS SO2 gas sensor. La2O3 nanoparticles (La2O3-NPs) with an average diameter of about 20 nm are produced by ultrasonic wave grinding. For SO2 gas, the La2O3-NPs/ZnO/MEMS gas sensor has a greater sensor response to 400 ppb SO2 gas at an operating temperature of 342 °C than a ZnO/MEMS gas sensor or a La2O3-NPs/MEMS gas sensor. This result demonstrates that the large 44% sensor response is due to the ZnO thin film with La2O3 nanoparticles. The experimental results also show that the ZnO thin film acts as an electronic transmission path. The sensors exhibit a higher sensitivity to SO2 than other gases (NO2, CO, CO2) at the optimal operating temperature of 342 °C. The reproducibility experiment shows that the La2O3-NPs/ZnO/MEMS SO2 gas sensor is stable.

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Surface adhesion study of La2O3 thin film on Si and glass substrate for micro-flexography printing

Cited by 4 publications

References 12 publications

Activation of persulfate by lanthanum modified activated coke for tetracycline degradation

Activation of persulfate by lanthanum modified activated coke for tetracycline degradation

Novel Robust Superhydrophobic Coating with Self-Cleaning Properties in Air and Oil Based on Rare Earth Metal Oxide

A La₂O₃-NPs/ZnO/MEMS SO₂ Gas Sensor

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Surface adhesion study of La2O3 thin film on Si and glass substrate for micro-flexography printing

Cited by 4 publications

References 12 publications

Activation of persulfate by lanthanum modified activated coke for tetracycline degradation

Activation of persulfate by lanthanum modified activated coke for tetracycline degradation

Novel Robust Superhydrophobic Coating with Self-Cleaning Properties in Air and Oil Based on Rare Earth Metal Oxide

A La2O3-NPs/ZnO/MEMS SO2 Gas Sensor

Contact Info

Product

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A La₂O₃-NPs/ZnO/MEMS SO₂ Gas Sensor