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Construction of TiO_(2)-pillared multilayer graphene nanocomposites as efficient photocatalysts for ciprofloxacin degradation

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International Journal of Minerals,Metallurgy and Materials 2021年第3期28卷 503-510页

作者： Xiong-feng Zeng Jian-sheng Wang Ying-na Zhao Wen-li Zhang Meng-huan Wang Hebei Provincial Laboratory of Inorganic Nonmetallic Materials College of Materials Science and EngineeringNorth China University of Science and TechnologyTangshan 063210China

We successfully constructed TiO_(2)-pillared multilayer graphene nanocomposites(T-MLGs)via a facile method as follows:dodecanediamine pre-pillaring,ion exchange(Ti4+pillaring),and interlayer in-situ formation of TiO_(2) by hydrothermal ***_(2) nanoparticles were distributed uniformly on the graphene *** special structure combined the advantages of graphene and TiO_(2) *** a result,T-MLGs with 64.3wt%TiO_(2) showed the optimum photodegradation rate and adsorption capabilities toward *** photodegradation rate of T-MLGs with 64.3wt%TiO_(2) was 78%under light-emitting diode light irradiation for 150 ***,the pseudofirst-order rate constant of T-MLGs with 64.3wt%TiO_(2) was 3.89 times than that of pristine TiO_(2).The composites also exhibited high stability and reusability after five consecutive photocatalytic *** work provides a facile method to synthesize semiconductor-pillared graphene nanocomposites by replacing TiO_(2) nanoparticles with other nanoparticles and a feasible means for sustainable utilization of photocatalysts in wastewater control.

关键词： pillared structure titanium dioxide-pillared multilayer graphene nanocomposites photocatalysis ciprofloxacin

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All in one doubly pillared MXene membrane for excellent oil/water separation,pollutant removal,and anti-fouling performance

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Chinese Journal of Structural Chemistry 2024年第8期43卷 38-47页

作者： Changle Liu Mingyuzhi Sun Haoran Zhang Xiqian Cao Yuqing Li Yingtang Zhou Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control National Engineering Research Center for Marine AquacultureMarine Science and Technology CollegeZhejiang Ocean UniversityZhoushan316004China

Given the diversity and complexity of coexisting oil/dyes/heavy metal ions/microorganisms in wastewater and volatile organic compounds(VOCs)in the air,developing separation materials featured in higher separation efficiency and lower energy consumption for oil and water separation,pollutant removal,and anti-fouling is urgently needed,but it remains a major challenge till ***,a multifunctional Ti_(3)C_(2)MXene membrane with unique double pillar support was proposed by liquid phase ultrasonication and vacuum filtration to over-come the above *** cetyl-trimethyl ammonium bromide(CTAB)and calcium chloride/sodium alginate(CaCl_(2)/SA)to the MXene membrane as crossed double pillars and superhydrophilic surface increases the tolerance and wettability of the *** fabricated doubly pillared MXene(d-Ti_(3)C_(2))membrane exhibits superior oil/water(O/W)separation efficiency(99.76%)with flux(1.284 L m^(-2)h^(-1))for canola oil and organic dye removing efficiency for methyl blue(MB)99.85%,malachite green(MG)100%,and methyl violet(MV)99.72%,respectively,which is 1.05,1.44,1.22,and 1.28 fold compared with pre-pillared Ti_(3)C_(2)(p-Ti_(3)C_(2)).The superior anti-oil/dye/fouling is attributed to lower oil conglutination,high hydrophily,and antibacterial *** versatile MXene membrane also shows distinguished separation of VOCs(η>99%)from polluted *** experimental and molecular dynamics(MD)computational simulation results illustrate that the superior sepa-ration efficiency of the Ti_(3)C_(2)MXene membrane is ascribed to the unique doubly pillared space *** study paves a new road to further research on one step integration strategy for complex O/W separation,wastewater and VOCs removal,and anti-fouling via tuning nano/macro architecture.

关键词： MXene pillared structure Oil/water separation Pollutants Anti-fouling Volatile organic compounds

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