Thermal decomposition of hydrogen peroxide in the presence of sulfuric acid

Wu, Lang-Long; Chen, K. Y.; Cheng, Shyh-Yueh; Lee, B. S.; Shu, Chi‐Min

doi:10.1007/s10973-007-8829-6

Cited by 43 publications

(20 citation statements)

References 7 publications

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“…As a result, the measured contact angle is gradually reduced on increasing the treatment time. Increasing the ratio of H 2 SO 4 in the piranha solution from 1:1 to 2:3 also enabled significant reduction in the contact angle due to increase in the reaction rate with high concentration of H 2 SO 4 41…”

Section: Resultssupporting

confidence: 88%

Study of hydrophilicity and stability of chemically modified PDMS surface using piranha and KOH solution

Maji

Lahiri

Das

2011

Surface & Interface Analysis

119

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Successful realization of various BioMEMS devices demands effective surface modification techniques of PDMS elastomer. This paper presents a detailed report on a simple and cost effective approach for surface modification of PDMS films involving wet chemical treatment in two-step processes: primarily involving piranha solution followed by KOH dip to improve hydrophilicity and stability of PDMS surface. Chemical composition of the solution and surface treatment condition have been varied and optimized to significantly increase the surface energy. The effect of surface modification of the elastomer after wet chemical treatment is analyzed using contact angle measurement and FTIR-ATR study. PDMS surface treated in piranha solution with H 2 O 2 and H 2 SO 4 in the ratio of 2 : 3 followed by a dip in KOH solution for 15 min duration each, demonstrated a maximum reduction of contact angle to ∼27• as compared to untreated sample having a contact angle of ∼110• . The removal of hydrophobic methyl group from elastomer surface and subsequent hydrophilization of surface by wet chemical process was confirmed from FTIR-ATR spectra. This result is also supported by improved adhesion and electrical continuity of deposited aluminum metal film over the modified PDMS surface.

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Section: Resultssupporting

confidence: 88%

Study of hydrophilicity and stability of chemically modified PDMS surface using piranha and KOH solution

Maji

Lahiri

Das

2011

Surface & Interface Analysis

119

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“…6 indicate that the leaching is an exothermic reaction. Wu et al [22] carried out experiment of thermal decomposition of hydrogen per- Fig. 6.…”

Section: Effect Of Particle Sizes On Copper Recoverymentioning

confidence: 99%

Leaching copper from shredded particles of waste printed circuit boards

Yang

Liu

Yang

2011

Journal of Hazardous Materials

168

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“…Thus, H 2 O 2 can keep active and stable enough within the reaction time ( ≤ 120 min) in this study. Furthermore, the results of differential scanning calorimetry (DSC) revealed that the thermal decomposition reaction of H 2 O 2 started at the temperature of about 67°C and this onset temperature increased with the addition of sulfuric acid (H 2 SO 4 ) to the maximum of 98°C [28]. So, H 2 O 2 was stable and had good utilization efficiency in this catalytic system at the temperature of 60°C and pH of 2.…”

Section: Discoloration Methodsmentioning

confidence: 94%

Role of schorl’s electrostatic field in discoloration of methyl orange wastewater using schorl as catalyst in the presence of H2O2

Prasad

et al. 2010

Sci. China Technol. Sci.

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Dyeing wastewater containing methyl orange (MO) could be effectively discolored by schorl-catalyzed Fenton-like system. Experimental results indicated that the MO discoloration ratios could be increased by increasing schorl dosage, temperature, initial H 2 O 2 concentration, and by decreasing solution pH. When the raw schorl and the schorl samples sintered at 750°C, 850°C, 950°C and 1050°C were used as catalyst in Fenton-like system, the MO discoloration ratios obtained were 82%, 31%, 30%, 31% and 7%, respectively. XRD results showed that samples sintered at 750°C, 850°C and 950°C had no change in structure and still held the crystal structure of schorl and quartz, but, the content of schorl crystal decreased. Whereas, schorl crystal completely disappeared in the sample sintered at 1050°C and two new crystal phases of hematite and spinel were formed, which resulted in disappearance of the spontaneous 'electrostatic poles'. Hence, it was inferred that the electrostatic field of schorl crystal could enhance the MO discoloration by schorl-catalyzed Fenton-like reaction. schorl, methyl orange, discoloration, Fenton-like system, polarization Citation: Xu H Y, Prasad M, Qi S Y, et al. Role of schorl's electrostatic field in discoloration of methyl orange wastewater using schorl as catalyst in the presence of H 2 O 2 .

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Thermal decomposition of hydrogen peroxide in the presence of sulfuric acid

Cited by 43 publications

References 7 publications

Study of hydrophilicity and stability of chemically modified PDMS surface using piranha and KOH solution

Study of hydrophilicity and stability of chemically modified PDMS surface using piranha and KOH solution

Leaching copper from shredded particles of waste printed circuit boards

Role of schorl’s electrostatic field in discoloration of methyl orange wastewater using schorl as catalyst in the presence of H2O2

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