US-12623209-B2 - Phosphor-transition metal-photocatalyst hybrid composite material, method for preparing the same, and filter using the same

US12623209B2US 12623209 B2US12623209 B2US 12623209B2US-12623209-B2

Abstract

A phosphor-transition metal-photocatalyst hybrid composite material includes a plurality of beads including a phosphor material, a binder, and zeolite, a plurality of transition metal particles supported on the surface of each of the plurality of beads, and a photocatalyst layer formed on the surface of each of the plurality of beads supporting the transition metal particles by coating a photocatalyst material.

Inventors

Kwang Mo Seong
Jung Sik Kim

Assignees

HYUNDAI MOTOR COMPANY
KIA CORPORATION
UNIVERSITY OF SEOUL INDUSTRY COOPERATION FOUNDATION

Dates

Publication Date: 20260512
Application Date: 20230228
Priority Date: 20220929

Claims (7)

1 . A phosphor-transition metal-photocatalyst hybrid composite material comprising: a plurality of beads comprising a phosphor material, a binder, and zeolite; a plurality of transition metal particles supported on the surface of each of the plurality of beads; and a photocatalyst layer formed on the surface of each of the plurality of beads supporting the plurality of transition metal particles by coating a photocatalyst material.
2 . The phosphor-transition metal-photocatalyst hybrid composite material according to claim 1 , wherein the phosphor material comprises at least one selected from CaAl 2 O 4 :(Eu,Nd)-based, SrAl 2 O 4 :(Eu,Dy)-based, Sr 4 Al 14 O 25 :(Eu,Dy)-based, BaAl 2 O 4 :(Eu,Dy)-based, (Sr,Ba) 2 MgSi 2 O 7 :(Eu,Dy)-based, Ba 4 (Si 3 O 8 ) 2 :(Eu,Dy)-based, and [Ca,Sr,Ba]—Al—O compound-based materials.
3 . The phosphor-transition metal-photocatalyst hybrid composite material according to claim 1 , wherein the binder comprises at least one selected from sodium silicate (Na 2 SiO 3 ), sodium polyphosphate (NaPO 3 ) n , liquid silica, and glaze.
4 . The phosphor-transition metal-photocatalyst hybrid composite material according to claim 1 , wherein the plurality of transition metal particles comprise particles of at least one selected from Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Ru, Rh, Pd, Ag, Ta, W, Pt, and Au.
5 . The phosphor-transition metal-photocatalyst hybrid composite material according to claim 1 , wherein the photocatalyst material comprises titanium dioxide (TiO 2 ), graphitic carbon nitride (g-C 3 N 4 ), or a material formed of a combination thereof.
6 . The phosphor-transition metal-photocatalyst hybrid composite material according to claim 1 , wherein the photocatalyst layer further comprises SiO 2 .
7 . A filter comprising: an air-permeable body frame; and the phosphor-transition metal-photocatalyst hybrid composite material according to claim 1 fixed to the body frame.

Description

CROSS REFERENCE TO RELATED APPLICATIONS This application claims the benefit of Korean Patent Application No. 10-2022-0123913, filed on Sep. 29, 2022 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference. BACKGROUND 1. Field The present disclosure relates to a phosphor-transition metal-photocatalyst hybrid composite material, a method for preparing the phosphor-transition metal-photocatalyst hybrid composite material, and a filter including the phosphor-transition metal-photocatalyst hybrid composite material. 2. Discussion of the Background As air pollution caused by yellow dust and the like has recently become more serious, demand for air purification systems (e.g., air purifiers and air purifying devices) to improve the quality of indoor air is gradually increasing. Accordingly, various studies have been extensively conducted on methods for effectively purifying indoor air contaminated by a variety of air pollutants, exhaust gas of automobiles, volatile organic compounds (VOCs), harmful gases, odors, and viruses. Among these studies, a technique of purifying air using a photocatalyst with strong photolysis has drawn considerable attention. Titanium dioxide (TiO2), known as a representative photocatalyst material, generates radicals with strong oxidizing power when exposed to ultraviolet light, and the radicals decompose various environmental pollutants present in water or air into harmless carbon dioxide, water, etc. In addition, very high chemical stability of titanium dioxide without being changed even after exposed to light enables use of titanium dioxide semi-permanently. Meanwhile, reactive oxygen (O2′−) or hydroxyl radical (⋅OH) generated by photolysis has higher oxidizing power than conventional chlorine (Cl2) or ozone (O3) to have superior sterilization of harmful viruses and bacteria and deodorization. However, although titanium dioxide is a superior photocatalyst as a single-component material, photolysis occurs only upon absorbing high-energy ultraviolet light (UV, λ≤390 nm) due to a large band gap (for example, band gap of anatase phase: 3.2 eV). Thus, in the case where titanium dioxide is irradiated with sunlight, only a small amount of UV light of about 3 to 4% contained in sunlight may be absorbed by titanium dioxide. In addition, because titanium dioxide is photo-activated only in the form of nano-sized particles, there are many limits to directly apply nano-sized particles to devices for reducing air pollutants. Therefore, in order to efficiently use photocatalyst materials in air purification systems, it is necessary to develop a support capable of effectively fixing the photocatalyst materials and a method of precisely coating the photocatalyst material capable of maximizing photoactive reaction. SUMMARY Provided are a method for manufacturing granular beads by using a phosphor, which is a light-emitting material, as a support effectively supporting a nano-sized photocatalyst material and a method for preparing phosphor-photocatalyst beads having high photolysis performance of various harmful materials by coating the surfaces of the beads with a photocatalyst material and supporting a transition metal element on the surfaces of the beads. The transition metal-supporting phosphor-photocatalyst beads prepared according to the present disclosure is a composite photocatalyst material including titanium dioxide as a photocatalyst material, Cu as a transition metal element, and a phosphor as a light-emitting material, and photo-activation easily occurs not only by ultraviolet light but also visible light. Also, because the support fixing the photocatalyst material is manufactured in the form of granular beads, the composite material is very easily mounted on a filter of various types of commercially available air purification devices. In addition, a filter using the phosphor-transition metal-photocatalyst hybrid composite material of the present disclosure may be easily applied to air purification systems used to remove various air contaminants (e.g., harmful gases, volatile organic compounds (VOCs), viruses, and odors) by photolysis not only in an indoor space with a lighting system but also in a dark space without light, and mass production thereof is possible. However, the technical problems to be solved by the present disclosure are not limited to the aforementioned problems, and any other technical problems not mentioned herein will be clearly understood from the following description by those skilled in the art to which the present disclosure pertains. In accordance with an aspect of the present disclosure to solve the above-described problems, a phosphor-transition metal-photocatalyst hybrid composite material includes: a plurality of beads including a phosphor material, a binder, and zeolite; a plurality of transition metal particles supported on the surface of each of the plurality of beads; and a photocatalyst layer formed on the sur