In Situ Infrared Observation of a Photo-Decomposition Process of Organic Contaminants on a TiO2 Nanotube Film Surface

2019 ◽  
Vol 166 (15) ◽  
pp. H842-H848
Author(s):  
Teng Ma ◽  
Yasuo Kimura ◽  
Daisuke Tadaki ◽  
Ayumi Hirano-Iwata ◽  
Michio Niwano
Keyword(s):  
Organic Contaminants ◽  
Film Surface ◽  
Decomposition Process ◽  
Tio2 Nanotube ◽  
Infrared Observation ◽  
Photo Decomposition

Epitaxial growth manner and structure of superconducting oxide films

1990 ◽  
Vol 48 (4) ◽  
pp. 2-3
Author(s):  
Yoshichika Bando ◽  
Takahito Terashima ◽  
Kenji Iijima ◽  
Kazunuki Yamamoto ◽  
Kazuto Hirata ◽  
...  
Keyword(s):  
Ultrathin Films ◽  
Film Surface ◽  
High Energy ◽  
Epitaxial Films ◽  
Layer By Layer ◽  
Initial Growth ◽  
In Situ Growth ◽  
High Quality ◽  
Activated Reactive Evaporation

The high quality thin films of high-Tc superconducting oxide are necessary for elucidating the superconducting mechanism and for device application. The recent trend in the preparation of high-Tc films has been toward “in-situ” growth of the superconducting phase at relatively low temperatures. The purpose of “in-situ” growth is to attain surface smoothness suitable for fabricating film devices but also to obtain high quality film. We present the investigation on the initial growth manner of YBCO by in-situ reflective high energy electron diffraction (RHEED) technique and on the structural and superconducting properties of the resulting ultrathin films below 100Å. The epitaxial films have been grown on (100) plane of MgO and SrTiO, heated below 650°C by activated reactive evaporation. The in-situ RHEED observation and the intensity measurement was carried out during deposition of YBCO on the substrate at 650°C. The deposition rate was 0.8Å/s. Fig. 1 shows the RHEED patterns at every stage of deposition of YBCO on MgO(100). All the patterns exhibit the sharp streaks, indicating that the film surface is atomically smooth and the growth manner is layer-by-layer.

Insights into the Role of In-situ and Ex-situ Hydrogen Peroxide for Enhanced Ferrate(VI) Towards Oxidation of Organic Contaminants

2021 ◽  
pp. 117548
Author(s):  
Mengfan Luo ◽  
Hongyu Zhou ◽  
Peng Zhou ◽  
Leiduo Lai ◽  
Wen Liu ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Organic Contaminants ◽  
Ex Situ

Construction of Hierarchical ZnIn2S4/C3N4 Heterojunction for Enhanced Photocatalytic Degradation of Tetracycline

2022 ◽  
Author(s):  
Feng Min ◽  
Zhengqing Wei ◽  
Zhen Yu ◽  
Yu-Ting Xiao ◽  
Shien Guo ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Organic Contaminants ◽  
Charge Separation ◽  
Active Sites ◽  
In Situ Growth ◽  
Efficient Charge

Both efficient charge separation and sufficiently exposed active sites are critical limiting for solar-driven organic contaminants degradation. Herein, we describe a hierarchical heterojunction photocatalyst fabricated by in situ growth of...

In-Situ Oxidative Degradation of Emerging Contaminants in Soil and Groundwater Using a New Class of Stabilized MnO2 Nanoparticles

2016 ◽  
pp. 112-136
Author(s):  
Bing Han ◽  
Wen Liu ◽  
Dongye Zhao
Keyword(s):  
Organic Contaminants ◽  
Emerging Contaminants ◽  
Low Cost ◽  
Oxidative Degradation ◽  
In Situ Remediation ◽  
New Class ◽  
Mno2 Nanoparticles ◽  
In Situ Degradation ◽  
Trace Concentrations

Emerging Organic Contaminants (EOCs) such as steroidal estrogen hormones are of growing concern in recent years, as trace concentrations of these hormones can cause adverse effects on the environmental and human health. While these hormones have been widely detected in soil and groundwater, effective technology has been lacking for in-situ degradation of these contaminants. This chapter illustrates a new class of stabilized MnO2 nanoparticles and a new in-situ technology for oxidative degradation of EOCs in soil and groundwater. The stabilized nanoparticles were prepared using a low-cost, food-grade Carboxymethyl Cellulose (CMC) as a stabilizer. The nanoparticles were then characterized and tested for their effectiveness for degradation of both aqueous and soil-sorbed E2 (17ß-estradiol). Column tests confirmed the effectiveness of the nanoparticles for in-situ remediation of soil sorbed E2. The nanoparticle treatment decreased both water leachable and soil-sorbed E2, offering a useful alternative for in-situ remediation of EOCs in the subsurface.

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