Journal
NANOMATERIALS
Volume 11, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/nano11051335
Keywords
sieve-like CNT film; TiO2 nanowire; continuous-flow device; photodegradation; pollutant
Categories
Funding
- National Key Research and Development Program of China [2016YFA0203301]
- National Natural Science Foundation of China [51862035, 52062048]
- Science and Technology Project of Jiangxi Province [20192BCD40017, 20192ACB80002]
- Jiangxi Double Thousand Talent Program [S2018LQCQ0016]
- Science and Technology Project of Nanchang, China [2017-SJSYS-008]
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The construction of a sieve-like carbon nanotube/TiO2 nanowire film enables continuous-flow photoreactors to efficiently degrade pollutants in water, offering superior flexibility, tensile strength, and light penetration. This new strategy provides insights for designing and fabricating high-performance continuous-flow photoreactors in the future.
Continuous-flow photoreactors hold great promise for the highly efficient photodegradation of pollutants due to their continuity and sustainability. However, how to enable a continuous-flow photoreactor with the combined features of high photodegradation efficiency and durability as well as broad-wavelength light absorption and large-scale processing remains a significant challenge. Herein, we demonstrate a facile and effective strategy to construct a sieve-like carbon nanotube (CNT)/TiO2 nanowire film (SCTF) with superior flexibility (180 degrees bending), high tensile strength (75-82 MPa), good surface wettability, essential light penetration and convenient visible light absorption. Significantly, the unique architecture, featuring abundant, well-ordered and uniform mesopores with ca. 70 mu m in diameter, as well as a homogenous distribution of TiO2 nanowires with an average diameter of ca. 500 nm, could act as a waterway for efficient solution infiltration through the SCTF, thereby, enabling the photocatalytic degradation of polluted water in a continuous-flow mode. The optimized SCTF-2.5 displayed favorable photocatalytic behavior with 96% degradation of rhodamine B (RhB) within 80 min and a rate constant of 0.0394 min(-1). The continuous-flow photodegradation device made using SCTF-2.5 featured exceptional photocatalytic behavior for the continuous degradation of RhB under simulated solar irradiation with a high degradation ratio (99.6%) and long-term stability (99.2% retention after working continuously for 72 h). This work sheds light on new strategies for designing and fabricating high-performance continuous-flow photoreactors toward future uses.
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