Synergistic sono-adsorption and adsorption-enhanced sonochemical degradation of dyes in water by additive manufactured PVDF-based materials.
Synergistic sono-adsorption and adsorption-enhanced sonochemical degradation of dyes in water by additive manufactured PVDF-based materials.
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DOI：
10.1016/j.ultsonch.2023.106602
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发表时间：
2023-11
影响因子：
8.4
通讯作者：
Tudela, Ignacio
中科院分区：
文献类型：
--
作者：
Bossl, Franziska;Brandani, Stefano;Menzel, Valentin C.;Rhodes, Matilda;Tovar-Oliva, Mayra S.;Kirk, Caroline;Tudela, Ignacio
用于水中脱色的大体积pvdf基材料的增材制造。>在超声下PVDF板存在的40分钟内RhB去除率达95%。第一个超声作用下液相吸附的机理模型。超声波使吸附过程中膜对质量传输的阻力降到最低。PVDF板的吸附增强了RhB的声化学降解。本研究提出了第一个解释超声作用下液相吸附过程中最有意义的物理化学现象的机理模型。最初，这项研究的目的是开发一种易于制造和易于回收的用于降解水中RhB的压电催化剂，通过将BaTiO3的高压电催化性能与兼容的压电支架（如PVDF）相结合，由定制的增材制造-直接墨水书写系统与原位极化制造。然而，初步结果表明，所得PVDF-BaTiO3复合板的性能比单独使用BaTiO3压电催化剂差，并且极化对其性能没有任何影响（使用极化或未极化PVDF-BaTiO3复合板，2小时后RhB去除率为82%，而使用BaTiO3压电催化剂时，2小时后RhB去除率为92%）。对纯PVDF材料的进一步研究表明，在4 g L-1添加剂制造的PVDF板存在的情况下，超声辅助吸附和声化学降解发生了协同作用，而不是压电催化，可以在超声处理40分钟内去除bb0 - 95%的染料。本研究的结果及其与超声下液相吸附机理模型的评价表明，通过3d打印工艺获得的结构、更高的比表面积和更大的介孔体积，以及最小化膜对超声引起的质量传输的阻力，增强了添加剂制造的PVDF板对RhB的吸附。此外，由于添加剂PVDF在吸附相中浓度较高，因此对染料的声化学降解作用增强。这项研究表明，吸附过程，特别是在PVDF材料存在的情况下，在压电催化中可能比迄今为止报道的更为重要，以至于在添加剂制造的PVDF板存在的情况下，声吸附和声化学降解的协同组合可能足以实现水中染料的高去除率。
Additive manufacturing of bulky PVDF-based materials for dye removal in water. >95% removal of RhB in 40 min in presence of PVDF slabs under ultrasound. First ever mechanistic model for liquid phase adsorption under ultrasound. Ultrasound minimises film resistance to mass transport in adsorption. Adsorption on PVDF slabs enhances the sonochemical degradation of RhB. The present study proposes the first mechanistic model accounting for the most meaningful physico-chemical phenomena taking place in liquid phase adsorption processes under ultrasound. Initially, this study was aimed at developing an easy-to-make and easy-to-recover piezocatalyst for the degradation of RhB in water by combining the high piezocatalytical performance of BaTiO3 with a compatible piezoelectric support such as PVDF, manufactured by a customised additive manufacturing – direct ink writing system with in-situ poling. However, initial results showed that the resulting PVDF-BaTiO3 composite slabs performed worse than BaTiO3 piezocatalysts on their own, and that poling did not have any effect on their performance (82% RhB removal after 2 h when using either poled or unpoled PVDF-BaTiO3 composite slabs compared to 92% RhB removal after 2 h in presence of BaTiO3 piezocatalysts). Further investigation with pure PVDF materials demonstrated that, instead of piezocatalysis, synergistic ultrasound-assisted adsorption and sonochemical degradation were taking place, enabling the removal of >95% of the dye within 40 min of ultrasound treatment in the presence of 4 g L–1 of additive manufactured PVDF slabs. The results of this study and their evaluation with the mechanistic model proposed for liquid phase adsorption under ultrasound suggest that the adsorption of RhB on additive manufactured PVDF slabs was enhanced by the structure, higher specific surface ratio and higher volume of mesopores achieved through the 3D-printing process, as well as the minimisation of film resistance to mass transport due to ultrasound. Moreover, adsorption on additive manufactured PVDF enhanced the sonochemical degradation of the dye due to its high concentration in the adsorbed phase. This study demonstrates that adsorption processes, especially in the presence of PVDF materials, may be significantly more important in piezocatalysis than what has been reported to date, to the point that the synergistic combination of sono-adsorption and sonochemical degradation in presence of additive-manufactured PVDF slabs may be enough to achieve high removal rates of dyes in water.
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DOI：
10.1002/advs.202100864
发表时间：
2021-09
期刊：
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
影响因子：
--
作者：
Mahapatra SD;Mohapatra PC;Aria AI;Christie G;Mishra YK;Hofmann S;Thakur VK
通讯作者：
Thakur VK
影响因子：
--
作者：
Bossl, Franziska;Menzel, Valentin C.;Tudela, Ignacio
通讯作者：
Tudela, Ignacio
DOI：
10.1016/j.cogsc.2021.100537
发表时间：
2021-08-31
影响因子：
9.3
作者：
Bossl, Franziska;Tudela, Ignacio
通讯作者：
Tudela, Ignacio
影响因子：
8.4
作者：
Hamza, Wiem;Fakhfakh, Nadim;Benzina, Mourad
通讯作者：
Benzina, Mourad
DOI：
10.1007/s10450-020-00258-9
发表时间：
2020-09-11
影响因子：
3.3
作者：
Brandani, Stefano
通讯作者：
Brandani, Stefano