To manufacture water disinfection filters using porous ceramics coated with nanosilver. Filters are able to remove pathogenic microorganisms and toxic substances such as arsenic and heavy metals.

- Successfully produced water disinfecting filters based on porous ceramic material coated with silver nanoparticles. The porous ceramic filters assembled with a small carbon nanotubes (CNTs) cartridge were manufactured with a specific capillary surface area of 3.9m2/g and effective porosity of over 60 volume %.
- Successfully attached silver nanoparticles on a porous ceramic material by a new in-situ method, which based on the burning of the filler saturated with silver nitrate during the calcination of the raw ceramic material. This method is able to allocate firmly most silver nanoparticles on the surface of the porous channels formed after calcination of the ceramic material. Due to this the silver nanoparticles would be lessly washed out from the filter during filtration process.
- The ceramic filters fabricated by this way were highly effective against bacteria in water (with a density up to 106CFU/ml), and the effect was long lasting up to 10 weeks of filtration.
- CNTs have been used to improve the adsorption of toxic substances in water. Each cartridge contains 50 g of CNTs which is capable of adsorbing 4.15 g of lead, 2.5 g of nickel and 2.15 g of arsenic. Depending on the pollution of treating water one can choose appropriate sizes of CNTs cartridges.
- Successfully produced 10 nanosilver-coated ceramic potters suitable for the household water filtration.

The nanosilver-coated porous ceramic potters produced by in-situ reduction method for the first time were manufactured, which allow the silver nanoparticles to form on the surface of the porous channels during calcination of the ceramic material. In doing so the potters demonstrate a high bactericidal effectiveness and significant decrease of the silver nano particles washed out from the potters during water filtration.

- Scientific papers in referred journals:
1. Nguyễn Mạnh Tường, Đỗ Thị Thủy, Trần Thị Ngọc Dung, Nguyễn Văn Nội (2012) ”Nghiên cứu biến tính sợi nano cacbon làm vật liệu hấp phụ và ứng dụng để tách các ion kim loại nặng từ môi trường nước” Tạp chí phân tích Hóa, Lý và Sinh học, T17, Số 1/2012.
2. Tran Thi Ngoc Dung, Nguyen Manh Tuong (2011), “Studies on preparation of nanosilver and carbon nano tubes coated porous ceramic material used for water purification”, Proceeding of the 3rd International workshop on Nanotechnology and Application, Vung Tau, Viet Nam, AMN -138-P.
- Patent:
The National Office of Intellectual Property issued the Decision No. 25 240 dated 05.14.2013 On acceptance of valid application for registration of inventions "porous ceramic filter materials coated with silver nanoparticles for water purification and method for the manufacturing thereof".
- Technological products:
10 nanosilver-coated porous ceramic potters with a capacity of 10 l/day.
- Other products:
Scientific contribution to the content of one Ph.D. thesis which was defended successfully.

The results potentially offer a practical way to provide clean water to households in the flooded zones as well as the areas of water constraints.