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Your search keyword '"Wu, Shu-Yii"' showing total 154 results
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154 results on '"Wu, Shu-Yii"'

9. Fe-Doped g-C 3 N 4 /Bi 2 MoO 6 Heterostructured Composition with Improved Visible Photocatalytic Activity for Rhodamine B Degradation.

Author

Tsay, Chien-Yie, Chung, Ching-Yu, Chang, Chi-Jung, Chang, Yu-Cheng, Chen, Chin-Yi, and Wu, Shu-Yii

Subjects
PHOTOCATALYSTS, RHODAMINE B, DOPING agents (Chemistry), MOLYBDATES, PHOTODEGRADATION, SEMICONDUCTOR materials, VISIBLE spectra
Abstract

The binary heterostructured semiconducting visible light photocatalyst of the iron-doped graphitic carbon nitride/bismuth molybdate (Fe-g-C3N4/Bi2MoO6) composite was prepared by coupling with Fe-doped g-C3N4 and Bi2MoO6 particles. In the present study, a comparison of structural characteristics, optical properties, and photocatalytic degradation efficiency and activity between Fe-doped g-C3N4 particles, Bi2MoO6 particles, and Fe-g-C3N4/Bi2MoO6 composite was investigated. The results of X-ray diffraction (XRD) examination indicate that the hydrothermal Bi2MoO6 particles have a single orthorhombic phase and Fourier transform infrared (FTIR) spectroscopy analysis confirms the formation of Fe-doped g-C3N4. The optical bandgaps of the Fe-doped g-C3N4 and Bi2MoO6 particles are 2.74 and 2.73 eV, respectively, as estimated from the Taut plots obtained from UV-Vis diffuse reflectance spectroscopy (DRS) spectra. This characteristic indicates that the two semiconductor materials are suitable for absorbing visible light. The transmission electron microscopy (TEM) micrograph reveals the formation of the heterojunction Fe-g-C3N4/Bi2MoO6 composite. The results of photocatalytic degradation revealed that the developed Fe-g-C3N4/Bi2MoO6 composite photocatalyst exhibited significantly better photodegradation performance than the other two single semiconductor photocatalysts. This property can be attributed to the heterostructured nanostructure, which could effectively prevent the recombination of photogenerated carriers (electron–hole pairs) and enhance photocatalytic activity. Furthermore, cycling test showed that the Fe-g-C3N4/Bi2MoO6 heterostructured photocatalyst exhibited good reproducibility and stability for organic dye photodegradation. [ABSTRACT FROM AUTHOR]

Published
2024
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18. Dust collection efficiency analysis in a two-dimensional circulating granular bed filter

Author

Bai, Jing-Cheng, Wu, Shu-Yii, and Lee, An-Sheng

Subjects
Filtration -- Analysis, Environmental services industry, Environmental issues, Science and technology
Abstract

ABSTRACT Dust collection efficiency data were analyzed to determine better operating conditions for a two-dimensional circulating granular bed filter (CGBF). The dust collection efficiency in the granular bed was affected [...]

Published
2006

25. Kinetic Model of Thermophilic Biohydrogen Production from POME

Author

Md. Jahim, Jamaliah, Abdul, Peer Mohamed, Chu, Chen-Yeon, Wu, Shu-Yii, Takriff, Mohd Sobri, Harun, Shuhaida, Md. Jahim, Jamaliah, Abdul, Peer Mohamed, Chu, Chen-Yeon, Wu, Shu-Yii, Takriff, Mohd Sobri, and Harun, Shuhaida

Abstract

The study of fermentation kinetic parameters are crucial to understanding the environmental factors affect on biohydrogen production. Kinetic models for hydrogen production from anaerobic digestion of palm oil mill effluent (POME) by mixed culture were developed based on published work. The models accounted for substrate limitation, substrate inhibition, hydrogen production, and endogenous decay rate. Data from previous literature were used to compare four microbial growth kinetic models for hydrogen production in an ASBR system. The estimated values of the maximum specific growth rate (μm) were found to be 0.371 h-1. In this study, the parameters of Y, kd, and B0 calculated were 2.64 gVSS/gCOD, 0.053 h-1, and 0.133 L H2/gCOD, respectively. The model fitting was found to be in good agreement with the experimental and can be utilized for the optimization and design of the process.

Published
2019

30. Microneedle-based self-powered glucose sensor

Author

Valdés-Ramírez, Gabriela, Li, Ya-Chieh, Kim, Jayoung, Jia, Wenzhao, Bandodkar, Amay J., Nuñez-Flores, Rogelio, Miller, Philip R., Wu, Shu-Yii, Narayan, Roger, Windmiller, Joshua R., Polsky, Ronen, and Wang, Joseph

Published
2014
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31. ANALYSIS OF 16S rDNA PRIMER SETS FOR MOLECULAR TAXONOMY STUDY OF MIXED CULTURE THAT PRODUCE BIOHYDROGEN.

Author

AZRATUL MADIHAH AZAHAR, ANUAR, NURINA, JAMALIAH MD JAHIM, MOHD SOBRI TAKRIFF, and WU SHU YII

Subjects
RIBOSOMAL RNA, POLYMERASE chain reaction, ESCHERICHIA coli
Abstract

Molecular taxonomy study of mixed culture especially in a biohydrogen production system has become important as a basic study in understanding bacterial communities that contributed to biohydrogen production. One of the keystone methods in the molecular analysis of bacterial communities is the amplification of 16S rDNA gene via polymerase chain reaction (PCR). Various PCR primer sets for gene amplification have been applied for bacterial taxonomy analysis from different samples. The problem of being too general and unspecific was encountered when identifying biohydrogen producer bacteria from mixed culture samples using such universal primer set. In this study, we evaluated the performance of five primer sets from in-silico analysis using the SILVA SSU r132 RefNR database and PCR-DGGE for the identification of biohydrogen producing bacteria in mixed cultures from biohydrogen reactors determined. Primer set 357f/518r was the best primer set to be used in microbial community analysis of the biohydrogen producing bacteria. The primer set 357f/518r was related to hypervariable 3 (V3) region involving most bacterial genera, produced the highest number of biohydrogen producer bacteria sequence and with highest percentage of specificity (84.6%). This was followed by 357f/907r and 968f/1392r primer sets with 67.3% and 49.5% specificity, respectively. The PCR-DGGE analysis showed the presence of specific genus of biohydrogen producer bacteria such as Thermoanaerobacterium sp. and Clostridium sp. This study proposed an alternative approach in selection of primer sets during PCR analysis of mixed culture communities from biohydrogen cultivation systems. Thus, such method could also be applied for analysis of mixed culture from other environmental samples. [ABSTRACT FROM AUTHOR]

Published
2018

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