With the rapid development of the construction industry and real estate industry, related important chemical building materials products, architectural coatings, have also grown rapidly and become an important part of the coating industry. This research mainly discusses the salt-freeze-stripping resistance test of the photocatalytic nano-material bismuth tungstate in architectural coatings. Using sodium tungstate and bismuth nitrate as the tungsten source and bismuth source respectively, the two solutions are mixed to form a precursor solution, and the precursor is placed in a stainless steel reactor. After a certain hydrothermal time and temperature, bismuth tungstate nanoflowers are prepared. XRD, SEM, FT-IR, DRS and other characterization methods were used to analyze the morphology and structure of the product, and the positions of the band gap, conduction band and valence band of bismuth tungstate were determined by calculation. Photocatalytic degradation effect fuels such as MO and MB. The degree of internal damage during the ultrasonic transmission time is reflected by the relative change of the dynamic elastic modulus before and after freezing and thawing. The relative change value of the dynamic elastic modulus is determined by measuring the transmission time of the ultrasonic wave passing through the parallel axis 25mm from the surface of the test piece. UV-2450 spectrophotometer, the standard reagent is high-purity BaSO4. Characterize the light absorption characteristics according to the light absorption of the sample in the wavelength range of 200-800nm. Before the sample is pre-saturated,before freezing and thawing, the ultrasonic transmission time was measured after 14, 28, 42 and 56 freeze-thaw cycles. The measuring instrument used NM-4A-I non-metal ultrasonic detection analyzer. The penetration quality and penetration depth of the architectural coating deicing salt solution with a bismuth tungstate content of 30% is greater than that of the architectural coatings with a bismuth tungstate content of 16.7%. This research will promote the application of nanomaterials in architectural coatings.

Chadie Altrjmane. Anti-Salt Frost Erosion Performance of Photocatalytic Nano-Material Bi2WO6 in Architectural Coatings. International Journal of Engineering Technology and Construction (2022), Vol. 3, Issue 1: 62-79. https://doi.org/10.38007/IJETC.2022.030105.

[1] Kumar S G ,  Rao K . Comparison of modification strategies towards enhanced charge carrier separation and photocatalytic degradation activity of metal oxide semiconductors (TiO2, WO3 and ZnO). Applied Surface Science, 2017, 391(PT.B):124-148.

[2] Ma J ,  Li T ,  Chao X , et al. Hydrothermal Synthesis and Visible Light Photocatalytic Properties of Bi2O2CO3/Bi2WO6 Composite. Catalysis Letters, 2018, 148(2–3):41-50.

[3] Bansal A ,  Singhal N ,  Panwar V , et al. Ex situ Cu(0) nanoparticle mediated SET-LRP of methyl methacrylate/styrene-methyl methacrylate in a biphasic toluene–water system. RSC Advances, 2017, 7(18):11191-11197. https://doi.org/10.1039/C7RA00368D

[4] Ratova M ,  Kelly P J ,  West G T , et al. Reactive magnetron sputtering deposition of bismuth tungstate onto titania nanoparticles for enhancing visible light photocatalytic activity. Applied Surface Science, 2017, 392(jan.15):590-597. https://doi.org/10.1016/j.apsusc.2016.09.035

[5] Yu S ,  Zhang Y ,  Li M , et al. Non-noble metal Bi deposition by utilizing Bi2WO6 as the self-sacrificing template for enhancing visible light photocatalytic activity. Applied Surface Science, 2017, 391(PT.B):491-498. https://doi.org/10.1016/j.apsusc.2016.07.028

[6] Zhang J ,  Chen T ,  Lu H , et al. Hierarchical Bi2WO6 architectures decorated with Pd nanoparticles for enhanced visible-light-driven photocatalytic activities. Applied Surface Science, 2017, 404(MAY15):282-290. https://doi.org/10.1016/j.apsusc.2017.01.294

[7] Ji X ,  Dong L ,  Lu Q , et al. Electrospinning preparation of one-dimensional Co2+-doped Li4Ti5O12 nanofibers for high-performance lithium ion battery. Ionics, 2017, 24(9):1-8. https://doi.org/10.1007/s11581-018-2453-2

[8] Chen M ,  Huang Y ,  Lee S C . Salt-assisted Synthesis of Hollow BiWOMicrospheres with Superior Photocatalytic Activity for NO Removal. Chinese Journal of Catalysis, 2017, 38(2):348-356.

[9] Ji X ,  Dong L ,  Lu Q , et al. Electrospinning preparation of one-dimensional Co2+-doped Li4Ti5O12 nanofibers for high-performance lithium ion battery. Ionics, 2017, 24(9):1-8. https://doi.org/10.1007/s11581-018-2453-2

[10] Jiang L ,  Wang S ,  Shi L , et al. Solvothermal Synthesis of TiO2/Bi2WO6 Heterojunction Photocatalyst with Optimized Interface Structure and Enabled Photocatalytic Performance. Chinese Journal of Chemistry, 2017, 35(002):183-188. https://doi.org/10.1002/cjoc.201600563

[11] Dai W ,  Yu J ,  Deng Y , et al. Facile synthesis of MoS2/Bi2WO6 nanocomposites for enhanced CO2 photoreduction activity under visible light irradiation. Applied Surface Science, 2017, 403(may1):230-239. https://doi.org/10.1016/j.apsusc.2017.01.171

[12] Wang M ,  Jin Z ,  Liu M , et al. Nanoplate-assembled hierarchical cake-like ZnO microstructures: solvothermal synthesis, characterization and photocatalytic properties. RSC Advances, 2017, 7(52):32528-32535. https://doi.org/10.1039/C7RA03849F

[13] Wang Z ,  Hu T ,  Dai K , et al. Construction of Z-scheme Ag 3 PO 4 /Bi 2 WO 6 composite with excellent visible-light photodegradation activity for removal of organic contaminants. Chinese Journal of Catalysis, 2017, 38(12):2021-2029.

[14] Zheng C ,  Hua Y . Assembly of Ag3PO4 nanoparticles on rose flower-like Bi2WO6 hierarchical architectures for achieving high photocatalytic performance. Journal of Materials Science: Materials in Electronics, 2018, 29(11):9291-9300.

[15] XianghuiZhang, WeizhuoGai. Effect of surfactant on the photocatalytic activity of Bi2WO6 nanoparticles. Journal of Materials Science: Materials in Electronics, 2017, 28(13):9777–9781.

[16] Xin Y K ,  Tan W L ,  Ng B J , et al. Harnessing Vis–NIR broad spectrum for photocatalytic CO2 reduction over carbon quantum dots-decorated ultrathin Bi2WO6 nanosheets. Nano Research, 2017, 10(005):1720-1731. https://doi.org/10.1007/s12274-017-1435-4

[17] Xing, Pengfei, Zhao, et al. Preparation of Bi_2WO_6 and Its Ultra-Deep Oxidative Desulfurization Performance in Ionic Liquids. China Petroleum Processing & Petrochemical Technology, 2017, 01(v.19):102-108.

[18] Feng Y ,  Lai S ,  Yang L , et al. Polymer-derived porous Bi2WO6/SiC(O) ceramic nanocomposites with high photodegradation efficiency towards Rhodamine B. Ceramics International, 2018, 44(7):8562-8569.

[19] D  Hao,  Yin Y ,  Guo X . Synthesis and characterization of Ag/Bi2WO6/GO composite for the fast degradation of tylosin under visible light. Environmental Science and Pollution Research, 2018, 25(1):1-13. https://doi.org/10.1007/s11356-018-1296-8

[20] Zhang X ,  Yu S ,  Liu Y , et al. Photoreduction of non-noble metal Bi on the surface of Bi2WO6 for enhanced visible light photocatalysis. Applied Surface Science, 2017, 396(PT.1):652-658.

[21] Zhao Y ,  Wang Y ,  Liu E , et al. Bi 2 WO 6 nanoflowers: An efficient visible light photocatalytic activity for Ceftriaxone sodium degradation. Applied Surface Science, 2017, 436(APR.1):854-864.

[22] Jonjana S ,  Phuruangrat A ,  Thongtem S , et al. Synthesis, characterization and photocatalysis of heterostructure AgBr/Bi 2 WO 6 nanocomposites. Materials Letters, 2018, 216(APR.1):92-96. https://doi.org/10.1016/j.matlet.2018.01.005

[23] Ji X ,  Dong L ,  Lu Q , et al. Electrospinning preparation of one-dimensional Ce3+-doped Li4Ti5O12 sub-microbelts for high-performance lithium-ion batteries. Ionics, 2017, 19(12):1-8. https://doi.org/10.1007/s11051-017-4085-2

[24] Zheng X J ,  Li C L ,  Zhao M , et al. Photocatalytic degradation of butyric acid over Cu 2 O/Bi 2 WO 6 composites for simultaneous production of alkanes and hydrogen gas under UV irradiation. International Journal of Hydrogen Energy, 2017, 42(12):7917-7929.

[25] Jakhade A P ,  Biware M V ,  Chikate R C . Correction to "Two-Dimensional Bi2WO6 Nanosheets as a Robust Catalyst toward Photocyclization". Acs Omega, 2017, 2(10):7219-7229. https://doi.org/10.1021/acsomega.7b01086

[26] Bi H ,  Liu J ,  Wu Z , et al. Construction of Bi2WO6/ZnIn2S4 with Z-scheme structure for efficient photocatalytic performance. Chemical Physics Letters, 2021, 769(3-4):138449. https://doi.org/10.1016/j.cplett.2021.138449

[27] Phu N D ,  Hoang L H ,  Guo P C , et al. Study of photocatalytic activities of Bi2WO6/BiVO4 nanocomposites. Journal of Sol-Gel Science and Technology, 2017, 83(3):640-646. https://doi.org/10.1007/s10971-017-4450-8

[28] Zhang L ,  Yang C ,  Lv K , et al. SPR effect of bismuth enhanced visible photoreactivity of Bi2WO6 for NO abatement. Chinese Journal of Catalysis, 2019, 40(5):755-764. https://doi.org/10.1016/S1872-2067(19)63320-6