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A critical innovation of photocatalytic degradation for toxic chemicals and pathogens in air
Phuoc Loc Truong,Alemayehu Kidanemariam,박주현 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.100 No.-
Air pollution by toxic chemicals and pathogens (bacteria, viruses, and fungi) has become one of the mostcritical problems worldwide because it has strong negative impacts on human health, both indoors andoutdoors. Photocatalysis is a promising candidate to purify the atmosphere by removing pollutantsamong several physicochemical and biological methodologies. In this review, we discuss photocatalyticmaterials used for air purification, advanced methodologies for photocatalysts synthesis, and principlesof photocatalytic nanoparticles that decompose pollutants, which include inorganic and organiccompounds as well as dangerous pathogens. Recent achievements, outlook, and future directions in thefield are discussed.
Phuoc Loc Truong,Hojun Kim(김호준),Vu Binh Nam,Daeho Lee(이대호) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Laser digital patterning (LDP) process is applied to fabricate a high-temperature flexible transparent Ni heater on a colorless polyimide (cPI) substrate. Ni electrode patterns generated by LDP-induced reductive sintering of solution-processed NiO<SUB>x</SUB><SUB></SUB> nanoparticle (NP) on cPI achieves a low sheet resistance (26.3 Ω sq<SUP>-1</SUP>) with a high transmittance (87.3 %). The flexible transparent heater exhibits a long-term uniform heat distribution with fast heating (13 °C s<SUP>-1</SUP>) and cooling (9.6 °C s<SUP>-1</SUP>) rates. The temperature of the heater can be raised up to 310 °C under a low applied DC voltage of 11 V. A cyclic bending test (10000 cycles) and tape-pull tests demonstrate superior mechanical stability of Ni electrodes on cPI. The high temperature heater that fully utilizes the superior material properties of Ni and cPI, and the advantages of LDP process, has a significant impact on industrial and scientific sector of transparent heaters and flexible electronics.