File Name : figure.s1.tif Caption : figure.s1 schematic diagram of preparation process. (a) schematic diagram of superhydrophobic catalyst preparation process. (b) schematic illustrations on the process of the synthesis for superhydrophobic filter materials with integrated denitration and dust removal function. File Name : figure.s2.tif Caption : figure.s2 schematic diagram of (a) moisture-proof and (b) dust-proof device. File Name : figure.s3.tif Caption : figure.s3 (a) the static contact angle and rolling angle on the surface of mno_x catalyst changed with the content of fas. (b) sem and (c) tem image of mno_x catalyst powder. (d) pore size distribution and (e) particle size of mno_x catalyst before and after modification. File Name : figure.s4.tif Caption : figure.s4 moisture proof mechanism of the modified catalyst. File Name : figure.s5.tif Caption : figure.s5 sem of filter (a) original, (b) mno_x@filter (no resin). File Name : figure.s6.tif Caption : figure. s6 (a) wettabilty of sa-mno_x @filter after being immersed in solutions with ph = 1 or 13 for 96 hours. (b) change in the contact angles and rolling angles for water in different corrosive solutions (ph=1-13) after immersing for 24h. (c) wettabilty of sa-mno_x @filter after being wiped by finger for 500 cycles. (d) residual weight of sa-mno_x@filter after 1000 times of bending. File Name : figure.s7.tif Caption : figure.s7 (a) the air permeability of filter. (b) no_x conversions of mno_x@filter (no resin) at 180℃ in the presence of so₂ or h₂o (reaction conditions: [no_x] = [nh₃] = 500 ppm, [o₂] = 6 vol. %, 100 ppm so₂ (when used), 10 vol. % h₂o (when used), total gas flow 700 ml•min⁻¹(corresponding to the filtration velocity of 1 m•min⁻¹), n₂ balance.). (c) tg and dsc curves of blank filter, sa-mno_x catalyst and sa-mno_x@filter.