Highly Efficient Catalytic Performances of Nitro Compounds and Morin via Self-Assembled MXene-Pd Nanocomposites Synthesized through Self-Reduction Strategy

Abstract

With development of the society, the problem of environmental pollution is becoming more and more serious. There is the urgent need to develop a new type of sustainable green material for degradable pollutants. However, the conventional preparation method is limited by conditions such as cumbersome operation, high energy consumption, and high pollution. Here, a simple method named self-reduction has been proposed, to synthesize highly efficient catalytic nitro compounds and morin self-assembled MXene-Pd nanocomposites. Palladium nanoparticles were grown in situ on MXene nanosheets to form MXene@PdNPs. MXene@PdNPs composites with different reaction times were prepared by adjusting the reduction reaction time. In particular, MXene@PdNPs20 exhibited a high catalytic effect on 4-NP and 2-NA, and the first-order rate constants of the catalysis were 0.180 s−1 and 0.089 s−1, respectively. It should be noted that after eight consecutive catalytic cycles, the conversion to catalyze 4-NP was still greater than 94%, and the conversion to catalyze 2-NA was still greater than 91.8%. Therefore, the research of self-assembled MXene@PdNPs nanocomposites has important potential value for environmental management and sustainable development of human health, and provides new clues for the future research of MXene-based new catalyst materials.

Application of MXenes in environmental remediation technologies

“…Among the optimum content, the Co 3 O 4 /MXene-20% exhibited the highest removal capability, with 95% BPA degradation within 7 min. Additionally, Yin et al [ 79 ] proposed a Pd/Ti 3 C 2 T x composite for the reductive degradation of nitro compounds and morin. Figure 7 a shows the scheme for the self-reductive formation of Pd nanoparticles on MXene, where the growth of the Pd particles was controlled by adjusting the reaction time.…”

“…UV-spectra and the corresponding rate kinetic plots obtained using the Pd/MXene composite catalysts of b – d 4-nitrophenol (4-NP), e – g and nitroaniline (2-NA) and h – j morin. Reprint with permission [ 79 ]. Copyright 2019 by the authors.…”

Complete Automation of an Energy Consumption Reduction Strategy from a Water Treatment and Distribution Facility, Inside an Industrial Internet of Things-Compliant Proactive Historian Application

“…This relatively recent, wide spectrum, fast advancing, high potential, huge interest drawing research direction from the industrial branch is guided at the conceptual level by the Industrial Internet of Things (IIoT) [ 1 , 2 , 3 , 4 , 5 ] and Industry 4.0 [ 6 , 7 , 8 , 9 , 10 ] paradigms, both very similar approaches which are pleading towards the introduction of digitalization into industry and connecting the physical world to the Internet [ 11 ]. The potential benefits of this endeavor are not neglectable in any way and will be better highlighted with the introduction of more innovative technological solutions, such as the ones described in [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ].…”

The preparation of new palladium (II) complexes with Schiff base type ligands and its impregnated Al2O3 materials: As the catalysts for degradation/reduction of organic dyes

“…[ 14–16 ] In the literature, Pd complexes and Pd nanoparticles supported to solid materials have frequently been used as heterogeneous catalysts with excellent conversion rates in the reduction of organic dyes such as nitrophenols and eosin yellow, which are harmful to the environment. [ 17–22 ] In this perspective, Al 2 O 3 is a good supporting material because it is easily handled and increases the efficiency of catalysts synergistically. [ 23 ]…”