A Simple Disinfection Device for Families in Underdeveloped Regions

The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acsnano.5c13095 . Photographs and dissembled structure of the system (Figures S1 and S2); electrical performance testing of UV mercury lamps (Figures S3–S6); electrical output of the TENG (Figures S7 and S8); chemistry properties and life cycle assessments of negative triboelectric materials (Figures S9 and S10); working principle and COMSOL simulation of TENG (Figures S11 and S12); humidity interference test of the system (Figures S13–S15); schematic of the laboratory test platform of TEHG-UV systems (Figure S16); schematic diagram of laboratory motor testing platform (Figures S17); UV light intensity driven by the integrated device with hand-cranking at different rotational speeds (Figures S18); UV absorption spectra before and after UV treatment (Figures S19); disinfection effect of B. subtilis and MS2 (Figures S20 and S21); photographic image of the disinfection system (Figures S22); eighteen countries were identified with the cost over 1% of the gross national income per capita (Figures S23); households of the world lacking safe drinking water (Figures S24); disinfection efficiency treating different types of microbes (Figures S25); baseline value and weight factor for impactor categories (Table S1); cost of materials in a TEHG-UV (Table S2); quality parameters of the water samples used in this work (Table S3); levelized cost to provide sufficient drinking water per capita and its uncertainty range (Table S4); comparative LCA study of common disinfection methods (Table S5); and torque calculation of the device under different hand-cranking speeds (Table S6) ( PDF )