DESALINATION
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2025
·
IF 9.8
Fei Yu,Haoyuan Yin,Jie Li,Tianjie Chen,Liping Sun,Jie Ma
Developing bismuth-carbon composites that can alleviate the stress concentration and volume expansion problems during the Bi/BiOCl conversion reaction is crucial for electrochemical desalination, especially Cl − removal technology, but it is still a great challenge. Here, we report a B/N co-doped bismuth encapsulated in carbon tubes. Using CAU-17 as a template, a carbon tubular material with multiple carbon layer structures was successfully synthesized by co-pyrolysis with BCN nanosheets, which achieved effective encapsulation of Bi. As the pyrolysis temperature increased, the continuous evaporation of Bi prompted the transformation of the carbon tube structure from a soft carbon to a hard carbon structure interconnected by multi-layered short graphene flakes. This alleviated the instability of the electrode caused by the volume expansion during the Bi/BiOCl transformation reaction and also provided additional ion storage capacity. When applied to the CDI dechlorination anode, Bi@BCN-900 exhibited a high desalination capacity of 145.96 mg g −1 and low energy consumption of 0.53 kWh kg −1 NaCl at an applied voltage of 1.2 V. Moreover, Bi@BCN-900 showed good stability over long-term cycling tests. This work expands the application of CAU-17 and offers new research insights for the design of bismuth-based materials for CDI dechlorination anodes.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Mingjie Cheng,Bo Gao,Xiaoli Zheng,Wenzhuo Wu,Weiqian Kong,Pengfei Yan,Zubin Wang,Bin An,Yunpeng Zhang,Qingchao Li,Qun Xu
Exploring a facile, rapid and efficient route to produce metal-organic frameworks (MOFs) with highly accessible active sites is of great importance for catalysis. Here we demonstrate the CO 2 coordination can drive low temperature rapid synthesis of porphyrin-based bismuth-MOFs (Bi-PMOFs) by utilizing synergistic physical and chemical properties of supercritical CO 2 (SC-Bi-PMOFs). The molecular-level role of scCO 2 in the synthesis of SC-Bi-PMOFs have been investigated through a series of characterizations including in-situ time-dependent infrared spectroscopy, wherein chemical coordination of CO 2 promotes to fabricate 2D SC-Bi-PMOFs nanosheets. Moreover, the formation of Cu-PMOFs and Fe-PMOFs proves the universal scCO 2 strategy for synthesizing PMOFs. Density functional theory (DFT) calculations together with experiments results confirm the SC-Bi-PMOFs with abundant active sites guarantee efficient ligand-to-metal charge transfer and reduction efficiency of CO 2 . The high-efficiency utilization of CO 2 for synthesizing a series of MOFs and subsequent catalysis on photocatalytic CO 2 reduction for valuable chemicals realize the carbon recycle.
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ChemSusChem
·
2024
·
IF 7.5
Guorui Ma,Haiqiang Mu,Zhenli Lv,Jiaxing Guo,Min Zhu,Yonghong Li,Xiaozhong Wang,Jing Li,Feng Li
Graphical In the work, a Bi/ZnO@ZnSe photocathode with a lattice-matching interface and long-life high-energy photoelectrons is designed for the photoelectrocatalytic conversion of CO 2 to CO, which achieves a Faradaic efficiency of 88.9 % at −0.9 V vs. RHE and demonstrates excellent stability. The key aspect of the photoelectrochemical CO 2 reduction reaction (PEC CO 2 RR) lies in designing cathode materials that can generate high-energy photoelectrons, enabling the activation and conversion of CO 2 into high-value products. In this study, a coaxially wrapped ZnO@ZnSe array heterostructure was synthesized using a simple anion exchange strategy and metallic Bi nanoparticles (NPs) were subsequently deposited on the surface to construct a Bi/ZnO@ZnSe photocathode with high CO 2 conversion capability. This array photocathode possesses a large aspect ratio, which simultaneously satisfies a low charge carrier migration path and a large specific surface area that facilitates mass transfer. Additionally, the barrier formed at the n-n heterojunction interface hinders the transfer of high-energy photoelectrons from ZnSe to lower energy levels, resulting in their rapid capture by Bi while maintaining a relatively long lifetime. These captured electrons act as active sites, efficiently converting CO 2 into CO with a Faradaic efficiency above 88.9 % at −0.9 V vs. RHE and demonstrating superior stability. This work provides a novel approach for synthesizing high-energy photoelectrode materials with long lifetimes.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shen Wang,Meng Rong,Lin-Bing Sun,Yunze Zhao,Huifang Xing,Liangrong Yang
Indeed, the efficient and sustainable recovery of lithium from highly concentrated sodium-containing mother liquors of Li 2 CO 3 and salt-lake brines remains a significant challenge. Herein, two typical Li + recognition receptors, namely benzo-12-crown-4 and thenoyltrifluoroacetone, were separately introduced into the cationic and anionic parts to successfully synthesize novel bi-functionalized task-specific ionic liquids [(B12C4)C n im][TTA] (n = 4, 6, 8). A new, green, and high-efficiency extraction system has been developed by dissolving [(B12C4)C 6 im][TTA] in commercial room-temperature ionic liquid 1-hexyl-3-methyl-imdazolium bis(trifluromethylsulfonyl)imide [C 6 mim][NTf 2 ], without the addition of any other co-extractants. The newly developed [(B12C4)C 6 im][TTA]-[C 6 mim][NTf 2 ] extraction system exhibited a wide pH working range (4.0–11.0), high lithium extraction efficiency (95.4 %), as well as superior separation factors of Li/Na (β Li/Na = 2154.0) and Li/K (β Li/K =757.2). The extraction mechanism involving cation exchange was determined through slope analysis, ion chromatography, UV–vis spectroscopy and FT-IR spectra measurement, indicating that one [(B12C4)C 6 im][TTA] molecule can interact with two lithium ions and form a 1:2 complex. Moreover, the [(B12C4)C 6 im][TTA]-[C 6 mim][NTf 2 ] extraction system also demonstrated fast extraction kinetics, facile stripping and regeneration, along with good cycling performance. Furthermore, a multi-stage countercurrent extraction process to extract lithium from the simulated mother liquor of Li 2 CO 3 was evaluated. When the volume ratio (O/A) of oil phase (O) to water phase (A) was 1.0, only two theoretical extraction stages were needed to extract 91.4 % of lithium into the organic phase. Thus, the [(B12C4)C 6 im][TTA]-[C 6 mim][NTf 2 ] extraction system is promising for lithium extraction from mother liquor of Li 2 CO 3 and salt-lake brines. This study also opens the avenue for designing cationic and anionic bi-functionalized ionic liquids for metal ion separation.
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LAB ON A CHIP
·
2015
·Vol. 15
·期 17
·3481-3494
·
IF 6.115
Hui Zhao,Lyu Zhou,Qiang Zhang,Xiaoying Zhou,Yonghui Zhang,Huijun Chen,Yanan Du
Phenotypic screening has regained momentum in the pharmaceutical industry owing to its success over target-based screening. Most phenotypic screening relies on nonspecific biochemical readouts regarding cellular viability, which hampers the discovery of novel drug mechanisms of action (MOAs). Here we present a Contractility-based bi-Content micro-Collagen Chip (3CChip), which establishes cellular contractility as a biomechanics-related phenotype for drug screening. Bi-content analysis of cell contractility (imaged by iPhone) and viability suggests that the label-free contractility-based analysis exhibits superior sensitivity to compounds targeting contractile elements (e.g. focal adhesion, cytoskeleton), resulting in a enlarged target pool for drug assessment. Six typical readout patterns of drug response are summarized according to the relative positions of the contraction/viability curves, and drug targets are profiled into three categories (biomechanical, biochemical and housekeeping) by 3CChip, which will benefit subsequent target identification. The simple-to-use and effective 3CChip offers a robust platform for micro-tissue-based functional screening and may lead to a new era of mechanism-informed phenotypic drug discovery.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Jun Xiao,Weiyi Yang,Qi Li
Bi quantum dots were deposited onto rutile TiO 2 nanoparticles by a one-pot, solvent-thermal process to create the Bi/TiO 2 (rutile) heterojunction photocatalyst. Due to the specific semimetal property of Bi, a metal to semiconductor transition occurred for Bi quantum dots, which endowed them with the hole trapping capability to enhance the charge carrier separation in rutile TiO 2 and eliminate the need of sacrificial agents for the consumption of photogenerated holes in photocatalytic reduction process. The Bi/TiO 2 (rutile) heterojunction photocatalyst demonstrated an efficient photocatalytic bromate reduction under visible light illumination without the addition of sacrificial agents in the reaction solution, and it could be easily regenerated for reuse. Different with previously reported noble/transition metal modifications as the electron trapping center, this study demonstrated a novel material design strategy of the introduction of hole trapping centers to create photocatalysts with strong photocatalytic reduction capabilities, which could be readily adopted for a broad range of technical applications.
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MICROCHIMICA ACTA
·
2014
·Vol. 181
·期 13
·1591-1599
·
IF 3.719
Ban Rui,Zhu Jun-jie,Zhang Jianrong
We present a sensitive and selective method for the determination of organophosphorus pesticides (OPs) based on the inhibition of the enzyme acetylcholinesterase (AChE). It is making use of quantum dots QDs of the type Mn: ZnS that display long-lived phosphorescence emission and act as optical probes for hydrogen peroxide (H 2 O 2 ). In this assay, acetylcholine (ACh) is first hydrolyzed by AChE, and the enzyme choline oxidase (ChOx) further oxidizes choline under the formation of H 2 O 2 which quenches the phosphorescence of the QDs. If, however, OPs are added to the solution, the rate of enzymatic hydrolysis by AChE is retarded. This reduces the rate of production of H 2 O 2 and results in a reduced quenching efficiency. The slow decay time of the phosphorescence of the QDs also allows time-resolved luminescence intensity to be measured. This can eliminate background fluorescence from the sample and therefore improves analytical accuracy and the signal-to-noise ratio. Under optimized conditions, there is a linear relationship between luminescence intensity and the concentration of paraoxon in the 1 pM to 1 μM range, with an ~0.1 pM limit of detection which is much lower than that of most existing methods. The phosphorescent probe was applied to determine OPs in spiked real samples.
We present a sensitive and selective method for the determination of organophosphorus pesticides (OPs) based on the inhibition of the enzyme acetylcholinesterase (AChE). It is making use of quantum dots QDs of the type Mn-doped ZnS that display long-lived phosphorescence emission and act as optical probes for hydrogen peroxide (H 2 O 2 ).
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Yapeng Yao,Xiaodong Gou,Wei Liu,Zihang Liang,Jiangbo Zhang,Zhongliang Ma
Integrating energetic materials into microelectromechanical system (MEMS) to enhance their energy output characteristics has shown extensive potential across aerospace, defense, and civilian applications. Within this study, the MEMS compatible Cu/DNBT (DNBT = [5,5′-dinitro-3,3′-bi(1,2,4-triazole)]) and Cu/DNBT@nano-Al energetic films were successfully synthesized on the copper substrate using an electrochemical method and a drip coating method. The scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), differential thermal analyses (DTA), and a pulse laser ignition test were used to analyze the morphology, composition, thermal performance, and ignition properties of the prepared samples. The findings indicate that the prepared Cu/DNBT and Cu/DNBT@nano-Al energetic films exhibit a nanostructure, and their morphology can be effectively regulated via modifications to the deposition voltage, deposition time, and aluminum plating frequency. Furthermore, the energetic properties of Cu/DNBT@nano-Al films can be adjusted after the deposition of nano-Al. Their heat release, flame height and ignition duration can reach up to 1823.1 J·g–1, 13.5 mm, and 400 μs, respectively. These findings suggest that Cu/DNBT@nano-Al energetic films being a prime contender for initiating powders in MEMS pyrotechnics. In summary, this work offers valuable insights into the integration and application of energetic materials in MEMS ignition devices.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Keyu Chen,Ruiqi He,Jiacheng Guo,Lu Ye,Xi Chen,Changning Ran,Xinrui Yan,Jianjun Zhang,Sude Ma
(1- x ) BaTiO 3 – x Bi(Mg 0.25 Zn 0.25 Ti 0.5 )O 3 ( x = 0.00, 0.06, 0.12, 0.20,molar ratio) ceramics were prepared by solid sintering method. The effects of Bi(Mg 0.25 Zn 0.25 Ti 0.5 )O 3 (BMZT) doping on microstructure, dielectric, ferroelectric and energy storage properties of BaTiO 3 (BTO) were studied. With BMZT addition, the sintering temperature gradually decreases, the grain size reaches a minimum at x = 0.12 and the phase structure changes from tetragonal to cubic. And dielectric properties changed from temperature-dependent to temperature-insensitive. Additionally, higher cubic phase content induced slim polarization and electric field (P-E) loop and low remnant polarization (P r ). Therefore, 0.88 BaTiO 3 - 0.12 Bi(Mg 0.25 Zn 0.25 Ti 0.5 )O 3 ceramics achieved recoverable energy storage density (W rec ) of 702.7 mJ/cm 3 and high energy efficiency of 87.3 % under electric field of 93 kV/cm. It exhibited optimum properties, including a minimum grain size (0.620 μm), superior dielectric properties (ε r = 1811.3, tanδ = 0.0552 at 1150 °C), a high maximum polarization strength (14.3 μC/cm 2 ), and the maximum dielectric breakdown strength (93 kV/cm), as identified in the present study. It simultaneously maintains high energy storage density and efficiency over a wide electric field range and large temperature range (room temperature - 90 °C). Thus (1- x ) BaTiO 3 – x Bi(Mg 0.25 Zn 0.25 Ti 0.5 )O 3 ceramics are a promising material for energy storage applications.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Jianbo Ren,Tao Hu,Wenbo Zhang,Li Li,Wenhui Yuan
Photothermal phase change materials (PCM) are employed for the efficient conversion and storage of solar energy. In this work, a Cu-Zn bi-metallic metal-organic framework (MOF) was synthesized and combined with expanded graphite (EG), followed by high-temperature carbonization to prepare the supporting material for polyethylene glycol (PEG). Through the high-temperature carbonization process, nano-metallic copper is uniformly dispersed on the surface of the EG, accompanied by the formation of a new porous structure resulting from the evaporation of Zn vapour. The nano metallic copper particles enhance the thermal conductivity and photo-thermal conversion efficiency of the composite PCM, while the porous structure generated by Zn vapour improves the adsorption capacity of PEG. The composite PCM demonstrated a high phase change enthalpy of 174.6 J/g and excellent thermal reliability, with only a 2.29 % reduction in enthalpy after 200 melting-freezing cycles. Additionally, the thermal conductivity of the composite PCM reached 6.096 W/(m·K) which is 26.1 times higher than that of pure PEG, while the photo-thermal conversion efficiency achieved was 88.69 %. These properties indicate that the PEG/EG/Cu-Zn-MOF derived carbon composite PCM has great potential for applications in solar energy storage and conversion.
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Small
·
2024
·
IF 13
Wei Zheng,Chengshu Zhang,Yangjiao Han,Wenpin Wang,Zhibo Li
Developing a silicone elastomer with high strength, exceptional toughness, good crack tolerance, healability, and recyclability, poses significant challenges due to the inherent trade-offs between these properties. Herein, the design of silicone-based elastomers with a nanoscopic microphase separation structure and comprehensive mechanical properties is achieved by combining bi-incompatible soft segments and multi-scale hydrogen bonds. The formation of multi-scale hydrogen bonds involving urethane, urea, and 2-ureido-4[1H]-pyrimidinone (UPy) facilitates efficient reversible crosslinking of the synthesized polymer containing thermodynamically incompatible poly(dimethylsiloxane) (PDMS) and poly(propylene glycol) (PPG). The dynamic dissociation and recombination of hydrogen bonds, coupled with the forced compatibility and spontaneous separation of bi-incompatible soft segments, can effectively dissipate energy, particularly in the crack region during the stretching process. The obtained silicone-based elastomer exhibits a high break strength of 8.0 MPa, good elongation at break of 1910%, ultrahigh toughness of 67.8 MJ m −3 , and unprecedented fracture energy of 31.8 kJ m −2 while maintaining their thermal stability, hydrophobicity, healability, and recyclability. This resilient and long-lasting silicone-based elastomer exhibits significant potential for use in flexible electronic devices.
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Small
·
2025
·
IF 12.1
Chenyang Wang,Tiantian Guo,Ruizhi Tang,Shujuan Ma,Yinmao Wei,Yangyang Bian,Junjie Ou
The development of monodisperse hybrid silica microspheres with highly regular pore structure and uniform distribution of functional groups have significant value in the biomolecular separation field. In this work, the short range ordered pore channels are precisely constructed onto the non-porous silica microsphere surface by a bi-phase assembly method, and the cylindrical silica channel introduced a plethora of vinyl groups by “one-pot” co-condensation to form vinyl hybrid silica shell. As hydrophilic interaction chromatography (HILIC) stationary phase, the vinyl hybrid core–shell silica microsphere is simply modified with zwitterion glutathione (SiO 2 @SiO 2 -GSH), in which the HILIC enrichment process is significantly shortened due to its specific porous characteristics. Most importantly, SiO 2 @SiO 2 -GSH microsphere can enrich 2186 N-glycopeptides from the rat liver protein digest within 2 min, which mapped to 806 glycoproteins. Compared with HILIC enrichment result within 1 h, the glycoproteins and glycopeptides overlap are 88.3% and 79.1%, performing excellent reproducibility. The short range ordered channels onto the silica microsphere surface exhibit excellent mass transfer efficiency, so the developed bi-phase assembly method is expected to design more advanced hybrid silica materials for other urgently fields.
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