critical roles in monolith synthesis. Therefore, components facilitating the gelation process are often introduced during the synthesis [11; 12; 13; 15; 17; 18; 19]. In this context, [PERSON] et al. achieved gel formation by using a polymer-based crosslinker [12]. Similarly, [PERSON] et al. embedded multi-walled carbon nanotubes (MWCNTs) into a polymer matrix [18]. The importance of an initial dispersion of the CNTs has been highlighted by [PERSON] et al., who used sodium dodecylbenzene sulfonate (SDBS) for the dispersion of CNTs prior to gelation [15]. However, it has to be considered that these mostly inert additives might alter and impair the later properties of the monolith, as reported by [PERSON] et al., who reinforced the CNT network with polyvinyl alcohol (PVA) during the monolith synthesis [17]. A first step towards the synthesis of monoliths for technical applications was taken by [PERSON] et al., who focussed on a more economical synthesis protocol using low-cost MWCNTs [11]. While the use of MWCNTs could reduce material costs, the applied protocols in literature still require prolonged time for gelation and special drying techniques such as supercritical fluid drying [11; 12; 15; 17; 20]. Thus, the synthesis becomes complex and time-intensive, further reducing the cost-performance ratio of the resulting monoliths [21]. Addressing this research gap, we present a simple and efficient method for synthesizing stable and highly conductive CNT monoliths derived from low-cost bulk MWCNTs. Utilizing ultrasonication for the dispersion and gelation of the CNT suspension and only low amounts of PVA as a stabilizing agent, as well as a simple pressing and heat drying approach, the complexity and time for synthesis can be considerably reduced, enabling a facilitated scale-up and possible technical application of the resulting monoliths. Many efforts have been made, exploiting the use of CNT-based monoliths as electrode material for supercapacitors or as scaffolds for catalysis [14; 22; 23; 24; 25; 26]. However, a novel and up-and-coming application alternative presents the targeted electrosorption onto the monoliths' chargeable surface. By applying an electrical potential, the interfacial properties of the monoliths can be tuned in their surface charge and electrical double layer (EDL) structure [27]. Hereby, the adsorption and desorption of ions and molecules can be influenced and steered. In this context, several studies have been published on the use of CNT monoliths for capacitive deionization (CDI) and the removal of inorganic ions from brackish water [24; 28; 29]. However, the targeted electrosorption of organic molecules onto carbon electrodes is still scarcely studied today. In a simulative approach, [PERSON] et al. recently investigated the adsorption equilibria of charged organic molecules at the CNT surface [30]. In view of potential-controlled effects, the electrosorption of small organic molecules on a particulate CNT electrode has been investigated for a chromatographic setup by [PERSON] et al. [31; 32]. In particular the role of the EDL and the environmental conditions around the solid-liquid interface have been emphasized as critical factors in the electrosorption mechanisms. However, shortcomings of the setup were revealed to be the low electrode capacity and its structural changes throughout the operation time. As a further optimization, the use of a monolithic electrode can increase the mass to volume ratio of the electrode and consequently the number of available binding sites, enable a better and more homogenous potential distribution, and increase the overall structural stability of the electrode. In the following sections, we characterize: the material properties of untreated and oxidized MWCNTs for monolith synthesis (Section 3.1); the impact of ultrasonication onto the dispersion and gelation of the particle network (Section 3.2); and the resulting monoliths by their macroscopic properties and electrochemically as electrode material (Section 3.3).