The invention relates to a
plant source bacteriostatic air purifying agent, and belongs to the technical field of
air purification. Aiming at the problems of
toxicity residue, narrow antibacterial spectrum of
single plant extract,
low resource utilization rate and the like of a traditional chemical bactericide, the invention provides a multi-component synergistic natural antibacterial purifying agent. The composition comprises the following components in parts by weight: 10-25 parts of an
orange peel extract, 8-20 parts of an
artemisia argyi extract, 5-15 parts of a red-knees
herb extract, 40-60 parts of a modified diatomite carrier loaded with nano-
zinc oxide, 3-10 parts of a slow-release
adhesive and 1-5 parts of a natural
antioxidant. The preparation method comprises the following steps: preparing the
plant extract (the orange peel is subjected to
ethanol ultrasonic-
microwave synergistic extraction, the
mugwort is subjected to supercritical CO2 extraction, and the red-knees
herb is purified by water), modifying a carrier (diatomite is loaded with nano-
zinc oxide), and performing composite
granulation and
coating. Through synergistic bacteriostasis of active ingredients such as
limonene, cineole and
ellagic acid and
photocatalysis of nano-
zinc oxide, the 24-hour bacteriostasis rate on common pathogenic microorganisms such as
escherichia coli and
staphylococcus aureus reaches 85.3%-97.4%, the half-life period is prolonged to 60 days, the non-toxic grade is achieved, and the
biodegradation rate is larger than or equal to 90%. The invention has the advantages of high efficiency,
broad spectrum, safety,
environmental protection and long-acting stability, and is suitable for
indoor air microbial pollution prevention and control.