Polymer‐modified metal–organic frameworks combine the advantages of both soft polymers and crystalline metal–organic frameworks (MOFs). It is a big challenge to develop simple methods for surface ...modification of MOFs. In this work, MOF@microporous organic polymer (MOP) hybrid nanoparticles (UNP) have been synthesized by epitaxial growth of luminescent boron‐dipyrromethene (BODIPYs)–imine MOPs on the surface of UiO‐MOF seeds, which exhibit low cytotoxicity, smaller size distribution, well‐retained pore integrity, and available functional sites. After folic acid grafting, the enhanced intracellular uptake and bioimaging was validated.
Polymer‐modified MOFs: A metal– organic framework@microporous organic polymer (MOF@MOP) composite with low cytotoxicity, smaller size distribution, well‐retained pore integrity, and available functional sites has been synthesized by epitaxial growth of luminescent boron‐dipyrromethene (BODIPYs)–imine MOPs on the surface of UiO‐MOF seeds. After folic acid grafting, the enhanced intracellular uptake and bioimaging was validated (see scheme).
To study risk factors with the occurrence of the mesh exposure after pelvic floor reconstruction.
From Mar.2007 to Mar.2011, a retrospective study was made on the clinical data of 353 patients ...undergoing vaginal mesh pelvic floor reconstruction. The related complications of the mesh were surveyed, and risk factors associated with the mesh's exposure were studied by single factor and multiple factors logistic regression.
It was found that the exposure rate was 9.6% (34/353) after 1 year postoperative follow-up.Single factor analysis showed that patients who were not less than 70 years old, patients who were on their menopause stage, the occurrence of not less than three parturition, history of pelvic surgery, diabetes and smoking had a significant correlation (all P < 0.05) with the occurrence of the mesh exposure after pelvic floor reconstruction. Multiple factors logistic regression analysis showed that patients who were not less than 70 years of age (OR = 2.389), the occurrence of not less than three partur
Zr5018Nil1AlTi10Ti5 bulk metallic glass has been rolled at room temperature up to 95% in thickness reduction, and the dependence of microstructure on the strain was investigated. With increasing ...thickness reduction, the full width at half maximum （FWHM） and crystallization enthalpy decrease gradually till 80%, and then increase evidently at 95%. It is revealed that the reversible transition between the ordered and disordered atomic configurations was found in the metallic glass as the deformation proceeds, which is further verified by the high-resolution transmission electron microscopy images. The final microstructure in metallic glass during cold-rolling is the net result of two competing processes between shear-induced disordering and diffusion controlled reordering.
Ag/Bi
2
Sn
2
O
7
materials have high electrical conductivity but mechanical properties similar to those of Ag/SnO
2
owing to their poor Ag/Bi
2
Sn
2
O
7
interfacial wettability. In this study, ...Ni-doped Ag/Bi
2
Sn
2
O
7
was prepared by high-energy ball milling, powder metallurgy, and extrusion. The microstructures and physical, mechanical, and electrical properties of Ag/Bi
2
Sn
2
O
7
(Ni-doped) materials with different Ni molar fractions were investigated by XRD, SEM, XPS, Hall-effect tests, metal resistivity measurements, tensile tests, and electrical life tests. The formation of a crystalline Ni-containing solid solution is also confirmed. With an increase in the Ni-doping molar fraction from 0 to 8.3%, the resistivity of the Ni-doped Bi
2
Sn
2
O
7
powder increased, the Ag/Bi
2
Sn
2
O
7
interfacial wetting angle decreased from 104.6°, to 83.1°, the hardness and density of the Ag/Bi
2
Sn
2
O
7
(Ni-doped) material first increased and then decreased, while the resistivity exhibited an opposite tendency. The Ag/Bi
2
Sn
2
O
7
–5.2Ni (sheets) exhibited the lowest resistivity of 2.00 µΩ·cm, the highest hardness of 687 MPa, and the highest density of 9.99 g/cm
3
; its electrical life was 1.6 and 1.8 times that of Ag/Bi
2
Sn
2
O
7
and Ag/SnO
2
, respectively. Thus, an appropriate amount of Ni-doping can improve the interfacial wettability, physical properties, and electrical properties of Ag/Bi
2
Sn
2
O
7
electrical contact materials.
In stereoscopic 3D (S3D) color correction, visual inconsistency is a common problem that leads to perceptual quality degradations. In this paper, we propose an S3D image/video color correction ...strategy that resolves global, local, and temporal color discrepancies simultaneously. We achieve the image-based S3D color correction by three steps: a coarse-grain color correction for global color matching, a fine-grain color correction to further improve both global and local color consistencies, and a guided filtering process to guarantee the structural consistency before and after color correction. In addition, we extend the above strategy to S3D and multiview video color correction. To achieve temporal consistency between successive video frames, we develop an improved histogram matching within a sliding window on time axis. In our method, the mapping functions for each color channel change gradually following the video stream to avoid abrupt temporal changes in colors. The experimental results demonstrate that the proposed strategy outperforms the state-of-the-art color correction algorithms for images and videos.
Photocatalysis is a green approach to solving energy and environmental problems, and researchers are still pursuing high-performance photocatalysts. Although BiOX (X = Cl or Br) has a suitable ...bandgap and good stability, its photoresponse is mostly concentrated in the UV region. Conversely, SnS2 has a wide photoresponse range but exhibits perceptible photocorrosion and poor stability. To exploit the advantages of both BiOX and SnS2, this study hydrothermally synthesized and introduced superfine SnS2 (∼30 nm in size) into a BiOCl/BiOBr binary system to fabricate BiOCl/BiOBr/SnS2 composites. Subsequently, the degradation performance of these composites in a Rhodamine B solution under visible light was investigated. Results show that the BiOCl/BiOBr/SnS2 heterojunctions were successfully prepared and the composites exhibited the best photocatalytic performance with 6% mass fraction of SnS2 (BiOCl-to-BiOBr mol ratio = 1:1). The formation of a double S-schedule heterojunction between BiOCl/BiOBr and SnS2 not only accelerated charge separation and transfer but also broadened the photoresponse range and reduced photoelectron–hole recombination under full-spectrum irradiation. Loading a small narrow-bandgap photocatalyst onto a large photocatalyst provides an effective way to construct heterojunctions with excellent photocatalytic performance. The ternary photocatalyst presents a favorable photocatalytic stability, and its photodegradation rate is 4.6, 4.5 and 220.5 times that of BiOCl, BiOBr and SnS2, respectively.
•SnS2 particles with wide photoresponse range and fine size were synthesized.•BiOCl, BiOBr and SnS2 form visible-light responsive S-type heterojunctions.•Small SnS2 shortens electron transport paths in the ternary heterojunction.•Double S-scheme greatly improves photocatalytic performance of the heterojunctions.
Through fusing isoindigo (IID) units at 6,7;6′,7′‐positions, a series of new near‐infrared (NIR) absorbing and stable ribbon‐like conjugated molecules, namely nIIDs in which n represents the number ...of IID units, have been synthesized. The optical band gaps of the molecules are lowered from 2.03 eV of 1IID to 1.12 eV of 6IID with the increase of the conjugation length. 3IID, 4IID, and 6IID have strong absorption in the NIR region and exhibit photothermal conversion efficiencies of greater than 50 % under laser irradiation at λ=808 nm.
A series of fused isoindigo ribbons (nIIDs; n=1–4, 6) with lengths of up to 5.4 nm have been synthesized. They display band gaps as low as 1.12 eV and show good stability in air and under near‐infrared irradiation.
Display omitted
•A new compound of 2LiBH4·CO2 is synthesized for the first time.•A self-template method is developed to synthesize heteroatom–doped carbon from CO2.•Self-template mechanism is ...revealed based on new reactions of CO2 with 2LiBH4·CO2.•A capacity of 890 mAh g–1 of BPC is retained after 1200 cycles at 1.0 A g–1.
The realization of heteroatom doping can enable carbon functional materials to have superior physiochemical properties via tailoring electron and ion distribution. However, the facile synthesis of heteroatom-doped carbon materials without CO2 emission from precursor is a major challenge for low-carbon utilization of carbon materials. Herein, we report a facile self–templated method to synthesize boron–doped porous carbon derived from CO2 based on the new reactions of 2LiBH4·CO2 with CO2. Boron–doped porous carbon is produced via a consecutive reaction between 2LiBH4·CO2 and CO2. The solid intermediate products with porous structure are formed at the first-step reaction. The newly developed porous solid products serve as the template for the chemical vapor deposition of gaseous intermediate products at the second-step reactions. The self-templated mechanism is demonstrated to form porous templates at initial stage for depositing carbon and boron sources on templates to produce boron-doped porous carbon. As a lithium storage material, it delivers a reversible capacity as high as ∼1660 mAh g−1 at 0.2 A g–1 and ∼890 mAh g−1 at 1.0 A g−1 after 1200 cycles. This finding opens a low-carbon and self-templated strategy to synthesize heteroatom–doped carbon functional materials from CO2.
