ISO 22197-1-2016 PDF

Full title and description

Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for air‑purification performance of semiconducting photocatalytic materials — Part 1: Removal of nitric oxide. This ISO standard specifies a laboratory flow‑reactor test for quantifying the NO (nitric oxide) removal performance of materials containing or coated with semiconductor photocatalysts (commonly TiO2‑based).

Abstract

ISO 22197‑1:2016 defines a controlled test method in which a flat test piece is exposed to a model polluted air stream containing NO under UV illumination; the method measures net removal (photocatalytic oxidation) of gaseous nitric oxide under specified environmental and irradiation conditions. The method is intended for flat construction materials, honeycomb/structured filter forms and some polymer/composite substrates that incorporate ceramic photocatalytic phases, but it excludes powder or granular photocatalysts.

General information

• Status: Published / Current (second edition confirmed).
• Publication date: November 2016 (Edition 2, 2016‑11).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 81.060.30 (advanced ceramics).
• Edition / version: Edition 2 (2016) — supersedes ISO 22197‑1:2007.
• Number of pages: 13 (ISO published PDF length).

Scope

Specifies a laboratory test procedure to determine the air‑purification (NO removal) performance of semiconducting photocatalytic materials and surface coatings by continuous exposure of a prepared test piece to a model NO‑containing air stream under UV illumination. Applicable sample types include flat sheets/plates, board materials, honeycomb/structured filters and polymer/composite substrates that contain ceramic photocatalyst phases; the standard does not apply to powders or granular photocatalysts. The method is intended for evaluation of air‑purification performance only (not for water treatment, self‑cleaning, antifogging, antibacterial tests, etc.).

Key topics and requirements

• Test principle: continuous‑flow photoreactor exposing a defined specimen to a NO‑laden air stream while illuminated by UV‑A; net photocatalytic removal is calculated after accounting for dark adsorption/desorption.
• Photoreactor and specimen geometry: standard flat‑plate arrangement with a small controlled air gap between sample and optical window (typical specimen 5 cm × 10 cm; slit/gap ≈ 5 mm in many implementations).
• Standard test conditions (typical values used with this method): NO ≈ 1 ppmv, flow ≈ 3 L·min−1, relative humidity ≈ 50 %, temperature ≈ 25 °C, irradiance ≈ 1 mW·cm−2, test duration up to several hours (e.g., 5 h) — labs commonly apply a defined pre‑conditioning (e.g., 16–24 h UV at ≥1.5 mW·cm−2) before measurement.
• Measured outputs: NO conversion/removal percentage and derived removal rate under the specified conditions; results depend strongly on mass transfer and reactor geometry and should be reported with full test details.
• Limitations: method is not suitable for powders/granules and does not address other photocatalytic functions (water treatment, microbial inactivation, etc.).

Notes: the above geometry and operational parameters are those typically specified or used in ISO 22197‑1 implementations and in interlaboratory practice; exact reporting of reactor geometry, irradiance, RH, flow and preconditioning is required for comparability.

Typical use and users

Used by materials and coatings manufacturers, independent testing laboratories, university and industrial researchers, product certifiers and regulators to quantify and compare NO‑removal performance of photocatalytic building products (paints, tiles, concrete, façade materials), structured filters and composite substrates that include photocatalytic phases. Results are used for product development, quality control, performance claims and comparative research.

Related standards

ISO 22197 is a multipart series covering different model pollutants. Closely related parts include: ISO 22197‑2 (acetaldehyde removal) and ISO 22197‑3 (toluene removal) and later parts addressing formaldehyde (ISO 22197‑4) and methyl mercaptan (ISO 22197‑5). These companion standards use the same family of flat‑plate photoreactor methods adapted for each pollutant and reporting convention. For details see the individual part publications.

Keywords

photocatalysis, TiO2, fine ceramics, air purification, nitric oxide, NO removal, photoreactor, ISO 22197, advanced ceramics, test method.

FAQ

Q: What is this standard?

A: ISO 22197‑1:2016 is an International Standard that defines a laboratory test method to measure the air‑purification (nitric oxide removal) performance of semiconducting photocatalytic materials (typically TiO2‑based) in a flow‑type photoreactor.

Q: What does it cover?

A: It covers the test principle, apparatus, specimen preparation and conditioning, test procedure, calculation of NO removal and reporting requirements for flat/structured photocatalytic materials under controlled UV illumination and environmental conditions. It explicitly excludes powder or granular photocatalysts and does not cover non‑air applications.

Q: Who typically uses it?

A: Materials manufacturers, independent testing labs, academic researchers, product certifiers and regulators use ISO 22197‑1 for R&D, quality control and to substantiate comparative performance claims for NO‑removing photocatalytic products.

Q: Is it current or superseded?

A: ISO 22197‑1:2016 is the second edition (2016) and supersedes ISO 22197‑1:2007. The 2016 edition is published and has been confirmed in ISO reviews; users should check national adoption or amendments for any later national variations.

Q: Is it part of a series?

A: Yes — ISO 22197 is a multipart series (parts for NO, acetaldehyde, toluene, formaldehyde, methyl mercaptan, etc.). Each part adapts the flow‑reactor method to a specific model pollutant and reporting format.

Q: What are the key keywords?

A: Photocatalytic, TiO2, fine ceramics, air purification, NO, nitric oxide removal, photoreactor, ISO 22197‑1, test method, advanced ceramics.