Perovskite Materials for Sensing Applications: Recent Advances and Challenges

Spent lithium-ion batteries (LIBs) are essential secondary resource, containing valuable metal elements including lithium, cobalt, nickel, manganese. Recovering valuable metals from spent LIBs is significant for achieving environmental protection and alleviating resource shortages. Herein, a sustainable and facile process for Li2CO3 and Mn2O3 recovery from spent LiMn2O4 batteries (LMO) was proposed via sulfation roasting with waste copperas. The leaching efficiencies of Li and Mn reached approximately 100% and 82% under the optimal conditions, and the final recovered products were Li2CO3 and Mn2O3 with high purities. The sulfation reaction between LMO and copperas was the transition from solid-solid to gas-solid reaction. During the sulfation reaction, LMO spinel structure was decomposed into MnO2 and Mn2O3 crystal structures, and the anti-fluorite structure Li2O embedded in the spinel structure was released. The Li2O was easily to be sulfated, while MnO2 was partly reduced by Fe2+ to more stable spinel structure Mn2O3. Furthermore, FeSO4 decomposed into SO2 gas, which greatly improved the sulfation reaction through permeating into the unreacted core of LMO. As a result, the spinel structure of Mn2O3 was broken, and Mn was escaped to combine with SO42- to form MnSO4. This research provided an alternative technological route for green recovery of spent LMO batteries, demonstrating high potential for broad application. 

Sustainable and facile process for Li2CO3 and Mn2O3 recovery from spent LiMn2O4 batteries via selective sulfation with waste copperas

Label-free therapeutic drug monitoring in human serum by the 3-step surface enhanced Raman spectroscopy and multivariate analysis

Detection of Helicobacter pylori infection in human gastric fluid through surface-enhanced Raman spectroscopy coupled with machine learning algorithms.

CsPbBr3 Nanocrystals as Luminescent Probe for in situ Detection of Chloride and Iodide Ions in Water

The precise self-assembly of DNA molecules can be used to create nanoprecision supramolecular materials. However, the lack of methods to characterize such supramolecular materials limits their development. Surface-enhanced Raman spectroscopy (SERS) is widely used to detect the secondary structure of simple DNA molecules, but its application in the revealing of complex DNA supramolecular information remains challenging. Herein, we proposed a modified SERS-based platform able to provide structural information on DNA supramolecular materials. The silver nanoparticle-enhanced substrate uses acetonitrile as an internal standard and modifier, and calcium ions are used as an aggregating agent to induce the formation of stable "hotspots" of silver nanoparticles, where the base planes in DNA supramolecules are perpendicular to the surface of the substrate, obtaining enhanced Raman signals of base ring in both single-stranded DNA and DNA supramolecules for the first time. The structure of DNA supramolecules was efficiently characterized using this technique, showing the great application potential of this technique in the structural analysis of nucleic acids and their ligands.

/pdf/label-free-detection-of-dna-supramolecular-structure-3hg5kgex.pdf

Label-Free Detection of DNA Supramolecular Structure Formation by Surface-Enhanced Raman Spectroscopy.

Recovery of Battery-Grade Products from Mixed Spent Lifepo4/Limn2o4 Cathodes Via Slurry Electrolysis

Convective Heat Transfer Across Silicon Rods Under Uniform Wall Heat Flux in a Laboratory-Scale Siemens Reactor

Synthesis, crystal structure, DFT, vibrational properties, Hirshfeld surface and antitumor activity studies of 3-((4-methylpiperazin-1-yl) methyl)-1-octyl-5-(p-tolyl)-1H-pyrrolo[2,3-c]pyridine

The Price Impact of Tweets: A High-Frequency Study

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Papers

Label-Free Detection of DNA Supramolecular Structure Formation by Surface-Enhanced Raman Spectroscopy.

Recovery of Battery-Grade Products from Mixed Spent Lifepo4/Limn2o4 Cathodes Via Slurry Electrolysis

Convective Heat Transfer Across Silicon Rods Under Uniform Wall Heat Flux in a Laboratory-Scale Siemens Reactor

Synthesis, crystal structure, DFT, vibrational properties, Hirshfeld surface and antitumor activity studies of 3-((4-methylpiperazin-1-yl) methyl)-1-octyl-5-(p-tolyl)-1H-pyrrolo[2,3-c]pyridine

The Price Impact of Tweets: A High-Frequency Study