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Accelerators in concrete serve as admixtures to speed up the hardening process, enabling the concrete to achieve early strength faster. Although accelerators do not necessarily impact the time it takes concrete to set, they reduce this time in practice. A common accelerator is calcium chloride, which is particularly useful for hastening early strength development in cold weather or for rapid repair jobs that require quick heat generation after mixing.
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A Simple Microplate Assay for Accelerated Photocatalytic Activity Evaluation.

Yohei Cho1,2, Osamu Tagami1, Kyo Yanagiyama1

  • 1Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan.

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Summary
This summary is machine-generated.

This study introduces a high-throughput photocatalyst assay using a 96-well microplate, significantly reducing labor and time. The new method enables rapid screening of materials for solar energy applications.

Keywords:
high-throughput screeningkinetics analysismicroplate assayphotocatalysiswater treatment

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Photocatalysis

Background:

  • Photocatalysis research is crucial for harnessing solar energy but hindered by slow material evaluation.
  • Current methods for assessing photocatalyst performance are labor-intensive and time-consuming.
  • A need exists for high-throughput screening methods to accelerate the discovery of novel photocatalysts.

Purpose of the Study:

  • To develop a simple, labor-saving, high-throughput assay for evaluating photocatalyst activity.
  • To streamline the workflow for photocatalyst screening, from weighing to data analysis.
  • To remove the bottleneck of separating photocatalyst powders from solutions during measurements.

Main Methods:

  • Utilized a 96-well microplate format for simultaneous sample processing.
  • Developed a protocol integrating weighing, microplate preparation, light irradiation, and spectroscopic measurement.
  • Investigated the impact of dye-powder coexistence on absorbance and temporal profiles.

Main Results:

  • Achieved significantly improved throughput and reduced labor by eliminating powder-solution separation steps.
  • Established guidelines for optimizing photocatalyst and dye concentrations for accurate measurements and high throughput.
  • Demonstrated the assay's versatility, applicable to various dyes due to its reliance on absorption and scattering principles.

Conclusions:

  • The developed assay enables high-throughput photocatalyst performance evaluation (approx. 500 samples/day).
  • This method facilitates the exploration of a vast material space, accelerating the discovery of new photocatalysts.
  • The protocol offers a foundation for efficient screening of materials for solar energy applications.