Highly Ordered Hierarchically Macroporous MIL-125 with High Specific Surface Area for Photocatalytic CO₂ Fixation

Highly ordered hierarchical macroporous metal–organic framework (MOF) materials (macroporous MIL-125) have been successfully synthesized through a solvent evaporation-induced self-assembly route in one step. The obtained macroporous MIL-125 showed an extremely high specific surface area with the Brunauer–Emmett–Teller surface area reaching up to 1083 m2/g. Moreover, macroporous MIL-125 exhibited ordered hierarchical porous structure and excellent ultraviolet absorption ability. At present, atmospheric chemical fixation of CO2 is commonly used as a catalyst for noble metal materials, and few macroporous MOF materials are used for chemical fixation of CO2. Macroporous MIL-125 was used as the photocatalyst for atmospheric chemical fixation of CO2 and showed high cycle stability, good tolerance to substrates, and excellent yields of CO2 carbonylative coupling reactions under ultraviolet irradiation. These finding provides a novel route for chemical fixation of CO2 with photocatalysis through MOF materials

The annotation files of Tibetan black bear (Ursus thibetanus thibetanus) draft genome

Tibetan black bear genome annotation file (gff3 format)Tibetanblackbear.gff.gzThe predicted protein sequences of the annotations for the genome of Tibetan black bear (fasta format)Tibetanblackbear.pep.fasta.gzThe predicted protein-codng sequences of the annotations for the genome of Tibetan black bear (fasta format)Tibetanblackbear.cds.fasta.gz</div

The annotation files for the draft genome of the Tibetan black bear (Ursus thibetanus thibetanus)

Tibetan black bear genome annotation file (gff3 format)Tibetanblackbear.gff.gzThe predicted protein sequences of the annotations for the genome of Tibetan black bear (fasta format)Tibetanblackbear.pep.fasta.gzThe predicted protein-codng sequences of the annotations for the genome of Tibetan black bear (fasta format)Tibetanblackbear.cds.fasta.gz</div

Data_Sheet_1_Draft Genome Assembly for the Tibetan Black Bear (Ursus thibetanus thibetanus).docx

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Highly Monodisperse Cu–Sn Alloy Nanoplates for Efficient Nitrophenol Reduction Reaction via Promotion Effect of Tin

The hexagonal copper–tin alloy (Cu–Sn) nanoplates were synthesized using a high temperature solvent method, the length of six equilateral edges of hexagonal Cu–Sn nanoplates was 23 nm, and the thickness was 13 nm. The obtained hexagonal Cu–Sn nanoplates were highly monodisperse and allowed the formation of nanoarrays arranged with long-range order. The hexagonal Cu–Sn nanoplates exhibited high catalytic activity on catalytic hydrogenation of 4-nitrophenol to 4-aminophenol. Due to the promotion effect of Sn, the apparent rate constant (ka) of hexagonal Cu–Sn nanoplates was three times that of Cu nanoparticles. The density functional theory (DFT) calculations and experimental results demonstrated that Sn could promote the coordination process of −NO2 of 4-nitrophenol with Cu–Sn nanoplates and contribute to activation of 4-nitrophenol. In addition, the hexagonal Cu–Sn nanoplates showed high stability and reusability for the reduction reaction, good adaptability in different pH and the ionic strength, and wide applicability for the degradation of methylene blue, methyl orange, and rhodamine B, even in the industrial wastewater, suggesting that the Cu–Sn nanoplates are promising catalysts in organic industry wastewater treatment

Ultra-thin Two-Dimensional Trimetallic Metal–Organic Framework for Photocatalytic Reduction of CO₂

Photocatalytic reduction of carbon dioxide (CO2) into high-value chemicals is a very effective way to solve the greenhouse effect, improve the utilization ratio of resources, and cope with the energy crisis. However, the low catalytic activity and poor product selectivity of the catalyst have been largely restricting its large-scale application. Herein, we successfully synthesized an ultra-thin two-dimensional trimetallic metal–organic framework (NiZrCu-BDC) nanosheet as a photocatalyst for CO2 reduction, and the average thickness of NiZrCu-BDC is about 4 nm. The NiZrCu-BDC nanosheet has the ability to reduce CO2 to methanol (41.05 μmol h–1 g–1) and ethanol (36.62 μmol h–1 g–1), and the turnover frequency of NiZrCu-BDC is 34 times more than that of NiZr-BDC. Zr and Cu doping enables enrichment of Ni surface charges to promote CO2 chemisorption, and the ultra-thin structure can shorten the electron transport path. Meanwhile, the electron density of Ni catalytical sites in NiZrCu-BDC is enhanced by doping Cu and Zr to facilitate COOH* and CHO formation, which are deemed as key species for CO2 reduction reactions to liquid products. This work provides further insights into the photocatalytic reduction of CO2 based on the multi-metal–organic framework