Porous materials in analytical sample preparation: Current status and future perspectives

TrAC Trends in Analytical Chemistry, Год журнала: 2025, Номер unknown, С. 118193 - 118193

Опубликована: Фев. 1, 2025

Язык: Английский

---

Conductive Framework Materials for Chemiresistive Detection and Differentiation of Toxic Gases

Accounts of Chemical Research, Год журнала: 2024, Номер unknown

Опубликована: Сен. 11, 2024

ConspectusSensing complex gaseous mixtures and identifying their composition concentration have the potential to achieve unprecedented improvements in environmental monitoring, medical diagnostics, industrial safety, food/agriculture industry. Electronically transduced chemical sensors capable of recognizing differentiating specific target gases transducing these stimuli a portable electronic device offer an opportunity for impact by bridging utility information with global wireless connectivity. Among electronically sensors, chemiresistors stand out as particularly promising due combined features low-power requirements, room temperature operation, non-line-of-sight detection, high portability, exceptional modularity. Relying on changes resistance functional material triggered variations surrounding environment, devices achieved part-per-billion sensitivities analytes employing conductive polymers, graphene, carbon nanotubes (CNTs), metal oxides, nanoparticles, dichalcogenides, or MXenes sensing materials. Despite tremendous developments, need stable, selective, sensitive demands continued innovation design order operate interferents well humidity temperature.To fill existing gaps capabilities, metal-organic frameworks (MOFs) covalent organic (COFs) recently emerged class materials chemiresistive sensing. In contrast previously reported chemiresistors, at least three unique gas applications: (i) bottom-up synthesis from molecularly precise precursors that allows strategic control material-analyte interactions, (ii) intrinsic conductivity simultaneously facilitates charge transport signal transduction under low power (iii) surface area enables accessibility abundant active sites decontamination streams coordinating and, sometimes, detoxifying harmful analytes. Through emphasis molecular engineering structure-property relationships MOFs COFs, innovations integration strategies form factor (i.e., physical dimensions components), our group has paved way demonstrating multifunctional detection vapors. Backed spectroscopic assessment we illustrated how molecular-level lead performance filtration, detoxification By merging integration, show versatility scalability using devices. Taken together, achievements, progress spearheaded this other researchers, establish COFs applications transduced, portable,

Язык: Английский

---

Scalable Melt Polymerization Synthesis of Covalent Organic Framework Films for Room Temperature Low-Concentration SO₂ Detection

Journal of the American Chemical Society, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 27, 2024

The development of highly efficient sensors for low-concentration SO

Язык: Английский

---

Linkage Engineering of Semiconductive Covalent‐Organic Frameworks toward Room‐Temperature Ppb‐Level Selective Ammonia Sensing

Small, Год журнала: 2025, Номер unknown

Опубликована: Фев. 16, 2025

Rational design of molecular architectures is crucial for developing advanced materials such as covalent-organic frameworks (COFs) with excellent sensing performance. In this work, two isostructural COFs (β-keto-AnCOF and imine-AnCOF) the same conjugated linkers but distinct linkages are constructed. Although both have porous structure semiconductor behavior conferred by identical backbones, β-keto-AnCOF ─C═O side groups exhibits superior room-temperature ammonia (NH3) performance than imine-AnCOF even state-of-the-art dynamic commercial NH3 sensors, i.e., high sensitivity up to 18.94% ppm-1, ultralow experimental detection limit 1 ppb, outstanding selectivity, remarkable response stability reproducibility after 180 days. situ spectroscopy theoretical calculation reveal that additional charge transfer between sites in effectively increases distance Fermi level valence band, enabling highly-sensitive at ppb levels. This work provides novel next-generation high-performance sensors.

Язык: Английский

---

Recent advances of surface plasmon resonance sensors based on metal-organic frameworks

Talanta, Год журнала: 2025, Номер unknown, С. 128008 - 128008

Опубликована: Март 1, 2025

Язык: Английский

---

Spontaneously decorated palladium nanoparticles on redox active covalent organic framework for chemiresistive hydrogen gas sensing

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 81, С. 270 - 279

Опубликована: Июль 23, 2024

Язык: Английский

---

Advancements in porous framework materials for chemiresistive hydrogen sensing: Exploring MOFs and COFs

Dalton Transactions, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Semiconductor metal oxides detect H 2 even at the ppm level but need high temperatures and oxygen. MOFs/COFs higher concentrations, work lower temperatures, perform very well under inert conditions.

Язык: Английский

---

Metal-Oxide-Decorated Mesoporous Silica Chemiresistors for Exhaled Biomarker Detection

ACS Omega, Год журнала: 2025, Номер 10(15), С. 15629 - 15636

Опубликована: Апрель 11, 2025

A metal-oxide-decorated mesoporous silica (MOMS) chemiresistor platform enables the selective detection of disease-specific volatile organic compounds (VOCs) in exhaled breath. Functionalization these structures with metals and metal oxides facilitates a wide range VOCs. To create sensing architecture bicontinuous morphology that optimizes molecular diffusion electron transport pathways, we employ physically confined polymerization-induced phase separation (PC-PIPS) to fabricate template-directed controlled film thicknesses ranging from 1 5 μm. Incorporation (SnO2, ZnO) noble (Pt, Au) forms p-n heterojunctions, enhancing sensitivity selectivity through modulation depletion layers. The MOMS chemiresistors demonstrate distinct response patterns toward key biomarkers, including hydrogen sulfide (periodontal disease), toluene (gingivitis), formaldehyde (oral carcinoma), acetone (diabetes mellitus). Response magnitudes 1.75-5.66 at 10 ppm 5.56-12.13 100 H2S, unique electronic signatures, enabling identification complex gas mixtures. This scalable versatile fabrication approach establishes as promising for noninvasive, early-stage disease via breath analysis.

Язык: Английский

---

Hierarchical bimetallic MOF-derived ZnO/NiO with abundant mesopores for high-performance triethylamine gas sensing

Sensors and Actuators B Chemical, Год журнала: 2025, Номер unknown, С. 137980 - 137980

Опубликована: Май 1, 2025

Язык: Английский

---

Conductive metal-organic framework for ppb-concentration and highly selective SAW hydrogen sulfide sensing at room temperature

Sensors and Actuators B Chemical, Год журнала: 2024, Номер unknown, С. 136817 - 136817

Опубликована: Окт. 1, 2024

Язык: Английский

---