KEY ENGINEERING MATERIALS
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2022
·
IF 0
Shariena Shamsul Bahari,Yuen Mei Lian,Ros Azlinawati Ramli,Lee Siew Ling
Textile dyeing often employs reactive dyes. The dye wastewater contains hazardous materials and is toxic to humans and the environment. Photodegradation using a semiconductor photocatalyst is a promising alternative approach for water purification and wastewater treatment. However, the photocatalyst’s low adsorption ability is a problem in the photocatalysis process. To compensate for this shortcoming, photocatalyst content must be combined with an adsorbent. Raw corn cob and titanium dioxide (TiO2) were used in this photocatalysis. Due to a synergistic impact, raw corn cob’s ability to adsorb and titanium dioxide’s ability to photodegrade organic pollutants from water bodies is expected to boost the removal performance. The degradation of Reactive Blue 4 (RB4) as a targeted dye was carried out in this research using a suspended mixture of commercial anatase TiO2 and raw corn cob under UV light. The effect of initial pH solution, initial dye concentration and contact time, TiO2-corn cob dosages, and the influence of other pollutants were investigated as factors influencing photodegradation-adsorption of RB4. The high removal rate of RB4 was obtained at a low pH of 2 and RB4 concentration of 40 ppm. The increased dose of TiO2-corn cob improved the RB4 dye removal performance. In conclusion, combining photodegradation and adsorption systems as a hybrid treatment method resulted in a synergistic increase in the efficiency of RB4 removal.
研究领域:
环境科学
·
材料科学
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DOI
Nature Communications
·
2023
·Vol. 14
·期 1
·1-13
·
IF 16.6
Xie Yifan,Feng Shuo,Deng Linxiao,Cai Aoran,Gan Liyu,Jiang Zifan,Yang Peng,Ye Guilin,Liu Zaiqing,Wen Li,Zhu Qing,Zhang Wanjun,Zhang Zhanpeng,Li Jiahe,Feng Zeyu,Zhang Chutian,Du Wenjie,Xu Lixin,Jiang Jun,Chen Xin,Zou Gang
Artificial chiral materials and nanostructures with strong and tuneable chiroptical activities, including sign, magnitude, and wavelength distribution, are useful owing to their potential applications in chiral sensing, enantioselective catalysis, and chiroptical devices. Thus, the inverse design and customized manufacturing of these materials is highly desirable. Here, we use an artificial intelligence (AI) guided robotic chemist to accurately predict chiroptical activities from the experimental absorption spectra and structure/process parameters, and generate chiral films with targeted chiroptical activities across the full visible spectrum. The robotic AI-chemist carries out the entire process, including chiral film construction, characterization, and testing. A machine learned reverse design model using spectrum embedded descriptors is developed to predict optimal structure/process parameters for any targeted chiroptical property. A series of chiral films with a dissymmetry factor as high as 1.9 ( g abs ~ 1.9) are identified out of more than 100 million possible structures, and their feasible application in circular polarization-selective color filters for multiplex laser display and switchable circularly polarized (CP) luminescence is demonstrated. Our findings not only provide chiral films with the highest reported chiroptical activity, but also have great fundamental value for the inverse design of chiroptical materials.
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2018
·
IF 3.779
Tianlong Yu,Shixiang Lu,Wenguo Xu
The coral-like bismuth coated iron mesh (BCIM) was fabricated via chemical etching, immersion replacement and anneal. The resulting sample exhibited remarkable superhydrophobic/superoleophilic property with water contact angle of 163° and oil contact angle almost 0°. Visually, the water and hexane droplet could separately roll off and penetrate into the BCIM surface. Various oil-water (hexane, benzene, toluene, kerosene, bean oil, chloroform, tetrachloride, and water) separations were performed to investigate the separating performance. The initial separation efficiency of hexane-water reached 98.7% and it could maintain over 96% after 20 runs. The BCIM could also act as a scavenger to eliminate the floating or underwater oil. Moreover, it exhibited marvel buoyancy, desired stability and wear resistance.
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DOI
高影响因子
ChemCatChem
·
2016
·Vol. 9
·期 17
·3349-3357
·
IF 4.724
Shiyue Bian,Chenjuan Zhou,Peiran Li,Jiyang Liu,Xiaoping Dong,Fengna Xi
Graphical Joining the dots : Oxygen-functionalized graphene quantum dots (GQDs) are encapsulated into flocculated flexible titania nanosheets (TNSs) to form GQDs/TNSs composite photocatalyst through a facile electrostatic flocculation route. GQDs/TNSs exhibit high photocatalytic activity for the degradation of Rhodamine B under visible light irradiation owing to promoted charge separation. Titania nanosheets (TNSs) are of importance for photocatalytic application owing to the unique two-dimensional (2D) morphology, high crystallinity and plentiful surface charge. However, the large band gap prohibited the efficient utilization of sun light. Herein, we employed graphene quantum dots (GQDs) as green photocatalytic promoter to decorate TNSs during the electrostatic flocculation. The obtained GQDs/TNSs heterojunction was systematically characterized, and the results demonstrated that the composite exhibited an intimate coupling of GQDs and TNSs, a markedly visible light absorption and therefore the enhanced separation efficiency of photogenerated charges. This composite photocatalyst shows enhanced photocatalytic performance for the photodegradation of Rhodamine B (RhB) under visible light irradiation in comparison with pure restacked TNSs (rs-TNSs) and GQDs. Furthermore, this composite exhibited a superior reusability, and a high degradation ratio about 90 % was still achieved in the 5 th cycle. Moreover, a possible mechanism was proposed and superoxide radicals, holes and hydroxyl radicals were determined as the active species.
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DOI
高影响因子
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