Recent advancements in metal–organic frameworks integrating quantum dots (QDs@MOF) and their potential applications

Abstract

Design and development of new materials and their hybrids are key to addressing current energy issues. Thanks to their tunable textural and physiochemical properties, metal–organic frameworks (MOFs) show great potential toward gas sorption, catalysis, sensing, and electrochemical energy applications. Nevertheless, practical applications of MOFs have been hampered because of their limited electrical conductivity, micropore size, and poor stability. However, smart integration of zero-dimensional quantum dots (QDs) into an MOF template, where the host structure offers suitable interactions for enhancing the stability and synergic properties, may be a solution. The objective of this review is to summarize recent advances in the field of QD@MOFs, highlighting fresh approaches to synthesis strategies and progress made in their application to optoelectronic devices, sensing, biomedical, catalysis, and energy storage. The current challenges and future directions of QDs@MOFs hybrids toward advancing energy and environmental applications are also addressed. We anticipate that this review will inspire researchers to develop novel MOF hybrids for energy, optoelectronics, and biomedical applications.

Luminescent MOFs (LMOFs): recent advancement towards a greener WLED technology

“…Most of the early literature studies are dominated by REE-based LMOFs for white light generation. 76 However, as mentioned previously, due to the limited resources, economics associated with them and the adverse environmental effects of REEs, such WLED technology may not be suitable for a sustainable future. MOF researchers have targeted this problem and have come up with novel strategies to design REE-free phosphor materials for WLEDs.…”

Current trends in the synthesis, characterization and application of metal-organic frameworks

“…The PEC sensor exhibited good stability, selectivity, and reproducibility. 237 Giri et al 26 have fully documented the recent advances of integration of quantum dots (QDs) into MOF templates and their applications. Also, the latest advances in MOF-based gas sensors relying on different transduction mechanisms such as chemiresistive, capacitive/impedimetric, field-effect transistor or Kelvin probe-based, mass-sensitive, and optical ones have been summarized by Yuan et al 29 Again, the advancements in various pristine MOF materials and their composites for different electrical transducer-based gas sensing applications have been presented by Majhi et al 258 with a perspective that the use of catalysts in conductive MOFs can improve the sensitivity of pure-MOF-based sensors and the use of single-atom catalysts and bimetallic catalysts or construction of heterogeneous nanostructures is highly anticipated to improve their sensing properties.…”

“…However, many valuable reviews have been undertaken and the synthesis methods and applications of MOFs have been summarized. 8,18,[26][27][28][29][30][31] Many of them only dedicate a section for either the synthesis, characterization or application of MOFs. There is still a lack of a systematic summary that established the synergy in the synthesis, characterization and application of MOFs.…”

Equipping carbon dots in a defect-containing MOFviaself-carbonization for explosive sensing

“…[19][20][21][22][23][24][25][26][27][28][29] The confinement effects of nano/ sub-nanopores or specific binding sites in MOFs can effectively limit the aggregation of carbon structures and stabilize carbon nanostructures. 16,[30][31][32][33][34] The conventional method of preparing CDs with MOFs as templates is pyrolyzing organic solvents or guest molecules captured in MOFs. 30,35 Considering that some MOF materials also have excellent optical properties, [36][37][38] if they are used as templates, the products can be used as composites without removing the templates even after the CDs are prepared.…”

“…MOFs can not only continue to provide protection for CDs, but also greatly improve the selectivity and efficiency of CDs in sensing and catalysis. 32,35,39 However, in the conventional process of CD preparation with a carbon source introduced into MOFs, the uneven distribution and escape of the carbon source still exist. 11,16,35,39 Compared with traditional inorganic crystalline porous materials, MOFs have organic linkers and can be self-carbonized.…”