GB/T 41050-2021Nanotechnologies—Test method of the degradation of benzene by nano photocatalyst (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1. Structure and Drafting Rules of Standardization Documents" drafted.

1 Scope

This document specifies the principle, test equipment, reagents, and test steps for testing the performance of photocatalytic nanomaterials for benzene degradation by gas chromatography. procedures, calculation of results and test reports.

This document is applicable to flat-plate materials coated with photocatalytic nanomaterials and the formation of photocatalytic function on the surface of flat-plate materials. liquid material. This document uses a UV light source with a wavelength of 365 nm.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.

GB/T 30544.1 Nanotechnology Terminology Part 1. Core Terminology

GB/T 30809 Ultraviolet light source for performance testing of photocatalytic materials

JJG879 Verification Regulations for Ultraviolet Radiation Meters

3 Terms and Definitions

The terms and definitions defined in GB/T 30544.1 and the following apply to this document.

4 Principles

Using gas-solid reaction and photocatalytic reaction (see Appendix A), the samples loaded with photocatalytic nanomaterials were placed in a closed reactor with benzene evaporation air contact. Let the sample stand still to reach the equilibrium state of adsorption of benzene vapor; under the irradiation of ultraviolet light source, it is measured by gas chromatograph at regular intervals.

Determine the concentration of benzene in the reactor, and use the least squares method to fit the linear slope of the test data according to the concentration change, which is the photocatalytic material to benzene. photolysis index.

5 Test equipment and reagents