Realizing Toluene Deep Mineralization by Coupling Nonthermal Plasma and Nitrogen-Enriched Hollow Hybrid Carbon

Abstract

Achieving excellent efficiency to mineralize volatile organic compounds (VOCs) under nonthermal plasma catalysis (NTP-catalysis) systems tremendously relies on the catalyst design. Herein, we report a dual-template strategy for synthesizing a core− shell structured nitrogen-enriched hollow hybrid carbon (N-HHC) by a facile pyrolysis of a Mn-ZIF-8@polydopamine core−shell precursor. N-HHC exhibits a remarkable plasma synergy effect and superior degradation efficiency for toluene (up to 90% with a specific input energy of 281 J/L), excellent CO 2 selectivity (>45%), and byproduct-inhibiting capability. Such outstanding functionality of the developed N-HHC is uniquely attributed to its hollow multistage and channeling structure, high concentration of O 3 -decomposing species (pyrrolic and oxide pyridinic-N), and abundant ZnO active sites. Shedding light on an efficient synthetic strategy for designing an advanced nanocatalyst with enhanced VOC destruction in the NTP-catalysis system, the present results could be extended to design other N-doped metal/metal oxide-decorated hollow porous carbons for environment-related applications.

Optimizing the Interfacial Environment of Triphasic ZnO-Cu-ZrO2 Confined inside Mesoporous Silica Spheres for Enhancing CO2 Hydrogenation to Methanol

“…Overall, the results uncovered that although the mesoporosity was partially lessened because of pore blockage by NPs inside the catalysts structure, the sample still maintains a high void structure that remains accessible. Furthermore, the N 2 adsorption and desorption isotherms with a steeped isotherm pattern at P/P 0 of ∼0.01 is an indication of the presence of micropores in the resultant catalysts …”

“…Furthermore, the N 2 adsorption and desorption isotherms with a steeped isotherm pattern at P/P 0 of ∼0.01 is an indication of the presence of micropores in the resultant catalysts. 32 The evolution of crystal structures of the catalytic samples along the synthesis process was analyzed by XRD. As shown in Figure 2d, the as-prepared CZZ-MSS sample synthesized by the infusion of metal nitrate into MSS displays a series of characteristic peaks that can be assigned to the Cu 2 (NO 3 )-(OH) 3 phase (PDF#96-900-8311).…”

Thermal-Driven Optimization of the Strong Metal–Support Interaction of a Platinum–Manganese Oxide Octahedral Molecular Sieve to Promote Toluene Oxidation: Effect of the Interface Pt2+–Ov–Mnδ+

“…To further understand the pathway of toluene oxidation, in situ DRIFTS experiments were carried out, and the assignment of in situ DRIFTS bands is summarized in Table S4. As shown in Figure and Table S4, the vibration peak near 3700 cm –1 was attributed to ν­(O–H) . The bands at 2341 and 2360 cm –1 were assigned to the CO 2 gas phase .…”

“…As shown in Figure 7 and Table S4, the vibration peak near 3700 cm −1 was attributed to ν(O− H). 49 The bands at 2341 and 2360 cm −1 were assigned to the CO 2 gas phase. 50 The bands of 1747, 1733, and 1698 cm −1 were attributed to ν(C�O) stretching vibrations of aldehydes.…”

Non‐thermal Plasma for VOCs Abatement: Recent Advance

“…were able to create novel nitrogen‐rich hollow porous heterocarbon (N‐HHC) catalysts. Excellent plasma synergistic effects of N‐HHC were seen for ozonolysis and profound mineralization of toluene [88] . Because of their excellent catalytic activity and by‐product inhibition, hollow hierarchical porosity nanostructures appear to be interesting candidates for effective VOC removal employing NTP catalytic systems.…”