Fabrication of Photothermal Silver Nanocube/ZIF-8 Composites for Visible-Light-Regulated Release of Propylene

Abstract

Releasing propylene from metal−organic frameworks (MOFs) after adsorption is attractive, but remains challenging because of the energy penalty in desorption by traditional techniques. Now, a metal−organic framework composite is constructed by encapsulating Ag nanocubes into ZIF-8 for controllable propylene desorption. ZIF-8 acts as an effective porous shell for accommodating propylene molecules, and Ag nanocubes perform as local "nanoheaters" to elevate the temperature by utilizing optical energy. Based on the surface plasmon resonance of Ag nanocubes, light energy can be converted into thermal energy and further transferred to the surroundings. The desorption capacity can be controlled by varying the content of Ag nanocubes introduced, and almost 100% of the propylene is released for the optical sample. Distinct from the electrical heating in industry, light-triggered heating remotely elevated the temperature of adsorbents from the inside out, which is particularly beneficial to heat-insulating MOFs. In addition, this approach heats only adsorbents rather than the entire fixed beds, improving the energy and time efficiency. The present light-triggered desorption may open up a new avenue to develop advanced adsorption/desorption cycles.

Photomodulation on adsorptive desulfurization by Ag(0): Photothermal active sites with high stability

“…Under irradiation, the time‐varying electric field associated with light exerts a force on the negatively charged electron gas in Ag conduction band and drives them to oscillate collectively, resulting in a strong surface plasmon resonance (SPR) and generates heat 19 . UV‐vis spectra (Figure S5) shows that the synthesized Ag nanoparticles show a broad absorbance from 400 to 500 nm, indicating that the surface electrons of Ag nanoparticles oscillate and resonate with the incident light to undergo the SPR effects 30 . The corresponding UV‐vis spectra of the as‐synthesized samples are illustrated in Figure S6.…”

Light-driven efficient dry reforming of methane over Pt/La2O3 with long-term durability

“…Considering the above results comprehensively, the RWGS reaction is more obvious when the temperature exceeds $668 C, resulting in the The adsorption ability of the reactants on the catalyst has an important effect on the reaction, and the adsorption of gas molecules can be affected by the photothermal effect. 39,40 Therefore, CH 4 -TPD and CO 2 -TPD were performed under light irradiation or in dark to determine the effect of light; the results are depicted in Fig. 5a and b.…”

Metal/semiconductor interfaces in nanoscale objects: synthesis, emerging properties and applications of hybrid nanostructures

“…192 Other classes of interfaces receiving tremendous attention in recent years mainly due to their promising catalytic abilities are metal-containing molecular species, [193][194][195][196] hydrogenase enzymes, 197 metal-organic frameworks (MOFs), 198 and even metal-encapsulated MOFs. [199][200][201][202][203] Since their attachment to the SC is usually chemisorption or some physical interaction (electrostatic), they are out of the scope of this review. Recently, Wolff et al have demonstrated that molecular Ru-containing cocatalysts can augment classical CdS nanorod/Pt hybrid systems and achieve water splitting without sacricial substances.…”