Lignin-Modified Metal–Organic Frameworks for Fluorescence Detection of Cr6+ and Adsorption of Congo Red
Source abstract
Abstract
Herein, a lignin-modified metal–organic framework (MIL-NL) was successfully assembled by grafting aminated lignin onto MIL-101-Fe-NH 2 . With the introduction of aminated lignin via the Schiff base reaction, MIL-NL possesses not only the crystal structure of MIL-101-Fe-NH 2 but also that of Fe 2 O 3 . The benefits of the amine and hydroxyl groups of the aminated lignin on MIL-NL allow it to interact with different objects through hydrogen bonding. MIL-NL emits blue fluorescence at 435 nm under an excitation light of 380 nm. The MIL-NL was built to detect Cr 6+ by fluorescence “off” and ascorbic acid (AA) by fluorescence “on”. The detection limits of MIL-NL for Cr 6+ were 0.14 (1.5–20 μM) and 0.18 μM (40–200 μM), respectively, and AA in the range of 5–60 nM and 0.5–1.8 μM with LOD values of 0.425 and 15.90 nM, respectively. MIL-NL can detect Cr 6+ quickly and sensitively (<1 min). Furthermore, MIL-NL showed a strong adsorption capacity of up to 1495.23 mg/g for Congo red. Multifunctional lignin-modified MOFs offer great potential in the field of environmental detection.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Metal-Organic Frameworks: Synthesis and Applications · Molecular Sensors and Ion Detection · Advanced Nanomaterials in Catalysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
CAF; National Engineering Lab. for Biomass Chemical Utilization; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; Key Lab. of Biomass Energy and Material, Jiangsu Province; Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Institute of Chemical Industry of Forest Products, Nanjing 210042, China
School of chemical and chemistry, Yancheng Institute of Technology, Jiangsu Province, Yancheng 210042, China
Funding
Chinese Academy of Forestry
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