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- 저자 : Liu Chengbao (검색결과 2 건)
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Chengbao Liu,Peimin Hou,Bei Qian,Xiaoping Hu 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.118 No.-
Integrating healable and reportable ability to sustain new-generation smart anticorrosion coatings withlong-term durability is highly desirable to accommodate the development of marine industries. Herein, anew type of dual-function coating is designed to fulfill the needs. Through introducing the smartnanocontainers based on the core of HNTs loaded with 8-hydroxyquinoline (8HQ) and the shell madefrom sodium tripolyphosphate-chitosan (CS) into conventional epoxy matrix, the smart healable andreportable anticorrosion coating on carbon steel (Q235) was developed. Electrochemical impedance spectroscopy(EIS) and salt spray measurement indicated the corrosion inhibition effect of the nanocontainersand healable performance of composite coatings. Benefitting from the 8HQ, the designed waterborneepoxy coating displayed higher low-frequency modulus after 60 days of immersion, confirming thelong-term protection ability. Besides, the composite coating exhibited obvious dark-green color at damagedregion to timely sense and report the local corrosion in 30 min of immersion tests. This smart coatingwith sensitive corrosion visualization and well-performed healable properties holds great potential inactual anticorrosion fields.
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Synthesis of g-C3N4/CQDs composite and its photocatalytic degradation property for Rhodamine B
Jin Tao,Liu Chengbao,Chen Feng,Qian Junchao,Qiu Yongbin,Meng Xianrong,Chen Zhigang 한국탄소학회 2022 Carbon Letters Vol.32 No.6
To solve the problem of water pollution, researchers have proposed a photocatalytic degradation technology, in which the key factor is the development of efficient photocatalytic materials. Graphitic carbon nitride (g-C3N4), an n-type semiconductor, has been widely studied due to its suitable band gap (2.7 eV), low cost, easy preparation, non-toxicity, and high photostability. However, the pure-phase g-C3N4 still has defects such as low specific surface area, insufficient visible light absorption, low charge mobility, few active sites for interfacial reaction, and easy recombination of photogenerated electron–hole pairs, which leads to the lower photocatalytic activity of g-C3N4. Aiming at the problems mentioned above, this paper focus on the synthesis of g-C3N4-based composites with high photocatalytic activity via lemon juice induction method. Thiourea and lemon juice were selected as precursors, and carbon quantum dots (CQDs) as electron mediators were introduced anchoring on the surface of g-C3N4 to build g-C3N4/CQDs with compact interface. The results showed that small-sized CQDs are uniformly distributed on the surface of g-C3N4, and the g-C3N4/CQDs composite has a 2D0D structure, which reduces the recombination of photogenerated electron–hole pairs. The photocatalytic degradation efficiency of 4% g-C3N4/CQDs for RhB reaches the highest data of 90.9%, and the photocatalytic degradation rate is 0.016 min−1, which is about 2.3 times that of g-C3N4. After four cycles of photocatalytic reaction, the photocatalytic degradation efficiency of the material remained at 81.7%. Therefore, the g-C3N4/CQDs synthesized via lemon juice induction has a more stable microstructure, and the charge separation efficiency is greatly improved, which is suitable for practical photocatalytic environmental protection.
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