Fe‐doped MOF‐derived N‐rich porous carbon nanoframe for H₂S cataluminescence sensing

Abstract

Metal-doped porous carbon matrix composites are considered as outstanding H 2 S cataluminescence sensing materials for their good sulfur tolerance and high cataluminescence activity. In this work, an Fe-doped MOF-derived N-rich porous carbon nanoframe was successfully fabricated using the pyrolysis of Fe-doped ZIF-8 in an Ar atmosphere at a temperature of 900 C, and used for H 2 S cataluminescence sensing.Along with zinc volatilization, the obtained porous carbon nanoframe not only had high specific surface area and abundant voids, but also had well dispersed Fe species doped in the skeleton. Compared with Fe 2 O 3 /ZnO composites derived from the same precursor but different pyrolysis terms, this as-prepared Fe-doped N-rich porous carbon presented a three times increase in the cataluminescence intensity towards H 2 S, attributed to the porous carbon skeleton that is indispensable for dispersing catalytic active sites and providing more absorptive surface and voids. Comparably, this proposed sensor demonstrated high sensitivity and good selectivity, with the detection range of 1.57-19.58 μgÁml À1 and detection limit of 0.13 μgÁml À1 towards H 2 S. This work may provide a new pathway for preparing catalysts for cataluminescence sensing with better metal distribution, higher specific surface area, and richer pores than ever before.

Nanoframes as a Resilient Candidate for a Broader Spectra of Catalysis Challenges

“…With the increase in temperature, the sensing ability of sensors first increases and then decreases due to competition between gas adsorption and desorption (Figure 44B). Fe-doped MOF-derived porous C-based NFs, i.e., Zn 10 Fe 1 -C-900, have been proposed as efficient H 2 S sensors with a fast response time of 0.1 s and recovery time of 0.6 s, a long-term stability of up to 8 days, and a LOD of up to 0.13 µg mL −1 [127], the comparative analysis for H 2 S sensing of Fe-doped MOF-derived porous C-based NFs with rest of the Nano frames which are used in this regard are reported in Table 4. With the increase in H 2 S concentration, the CTL sensor intensity also increases (Figure 45B).…”

“…With the increase in H 2 S concentration, the CTL sensor intensity also increases (Figure 45B). sponse time of 0.1 s and recovery time of 0.6 s, a long-term stability of up to 8 days, and a LOD of up to 0.13 µg mL −1 [127] , the comparative analysis for H2S sensing of Fe-doped MOF-derived porous C-based NFs with rest of the Nano frames which are used in this regard are reported in Table 4. With the increase in H2S concentration, the CTL sensor intensity also increases (Figure 45B).…”

Instant Fingerprint Discrimination for Military Explosive Vapors by Dy3+ Doping a La2O3-Based Cataluminescence Sensor System

“…Typically, the CTL sensor array that was first developed in 2005 by Cao and Zhang utilizing cross-reactive patterns has been applied for detecting and identifying chemical species, such as hydrocarbons, saccharides, xylene isomers, etc. In the CTL sensing system, nanomaterial as a sensing element plays a decisive role in the distinct catalytic oxidation process of compounds due to different catalytic activities. − Lanthanum oxide (La 2 O 3 ), containing a class of elements possessing unique optical, catalytic, and magnetic properties on account of the unique configuration of the 4f electrons, has been explored for numerous applications in superconductors, optoelectronic devices, biosensors, and catalysts . Excellent chemical and thermal stability, low toxicity, reduced oxide leakage current, and greater voltage range make La 2 O 3 a potential candidate for constructing environmentally benign sensors for a variety of pollutants. , In addition, it has been proposed that ion doping , is an effective strategy to generate oxygen vacancies in a lattice, which provides a more feasible path for ion transport.…”

Fast preparation of Eu(BTB) MOFs in dielectric barrier discharge liquid plasma for luminescent sensing of trace iron

“…Metal–organic frameworks (MOFs) are crystalline materials formed by self‐assembly of metal clusters and organic ligands. [ 1,2 ] Different from other traditional materials (for example, zeolite), MOFs have the advantages of diverse compositions, [ 3 ] adjustable structure and function, [ 4 ] high specific surface area [ 5 ] and excellent optical properties, [ 6 ] which make them useful in fields such as gas storage [ 5 ] as well as separation, [ 7 ] sensing, [ 8,9 ] catalysis, [ 10,11 ] and biomedicine. [ 12 ]…”

“…Metal-organic frameworks (MOFs) are crystalline materials formed by self-assembly of metal clusters and organic ligands. [1,2] Different from other traditional materials (for example, zeolite), MOFs have the advantages of diverse compositions, [3] adjustable structure and function, [4] high specific surface area [5] and excellent optical properties, [6] which make them useful in fields such as gas storage [5] as well as separation, [7] sensing, [8,9] catalysis, [10,11] and biomedicine. [12] Benefit from hyper-coordinate capability and multiple types of coordination configurations of lanthanide ions, the self-quenching of luminescence in lanthanide metal-organic frameworks (Ln-MOFs) is avoided by the dispersive arrangement of lanthanide ions.…”