The Cu2O octahedral microcrystals have been successfully fabricated by a surfactant-free solvothermal approach. The morphology and structure of the as-prepared sample were characterized by scanning electron microscopy, X-ray powder diffraction and UV-Vis spectroscopy. It was found that the structure and morphology of Cu2O microcrystals were strongly affected by synthesis time and temperature. Based on the time-dependent experiment, the possible formation mechanism of Cu2O octahedral microcrystals was proposed. The photocatalytic activities of as-prepared Cu2O samples were also evaluated for degradation of methyl orange under visible-light irradiation. The results showed that the Cu2O synthesized at 180 °C for 4 h had a better photocatalytic performance due to its high percentage of exposed (111) crystal facet and the lowest band gap energy.
- IWA Publishing
- A surfactant-free solvothermal synthesis of Cu2O microcrystals ...
Assessing the impact of volcanic eruptions on climate extremes using CMIP5 models
This study analyzes extreme temperature and precipitation responses over the global land to five explosive tropical volcanic eruptions that occurred since the 1880s, using CMIP5 multi-model simulations. Changes in annual extreme indices during post-eruption years are examined using a composite analysis. First, a robust global decrease in extreme temperature is found, which is stronger than the internal variability ranges (estimated from random bootstrap sampling). Inter-model correlation analysis shows a close...
Temperature And Humidity Vs. Paint
If you have an outdoor painting project on your to-do list, you might be watching the weather report to determine the ideal day to get it done. Yet if all you’re watching for is a day without rain, you’re not paying close enough attention to the weather report. That’s because temperature and humidity can have significant effects on paint as it’s drying, and none of them are good. Even if there’s no rain in the forecast, painting under conditions in which temperatures and/or humidity...
What is a Sanitary Sample Valve?
As its name suggests, this type of valve is used in processing industries for sampling various products in different states of matter such as liquid and gas. The different types of fluids are examined using various techniques using sampling valves. Some of the main techniques include physical measurements, chemical analysis and microbiological examination. These review methods are conducted in the process industries primarily for the purpose of quality control, regulatory assessment and the identification of any...
Degassing a Liquid for Your Syringe Pump
Four common methods for degassing samples Methods for Degassing Liquid All solutions equilibrated at room temperature and pressure will contain dissolved gases. Sample degassing is the process of removing these dissolved gases from solution. Removal of these gases may be necessary because the gases may escape from solution and form air bubbles in your syringe, which can negatively affect the performance of your syringe pump. Additionally, removal of these gases could prevent unwanted side reactions, such as...
What is Laser Induced Breakdown Spectroscopy (LIBS)?
Laser Induced Breakdown Spectroscopy or LIBS is an analytical technique that`s been used in laboratories for many years. Most handheld LIBS analysers are used for fast sorting of alloys in scrap yards, and alloy identification and analysis in various applications within the metals industry. Watch video here. How does LIBS work? During LIBS analysis, a focused pulsed laser hits the sample removing a very small amount of material from the surface. The sample is hit by thousands of pulses during a typical...