INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
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IF 7.139
Jiashu Long,Xiaocan Zhang,Siqin Zeng,Tong Pei,Huixiao Ma,Xuesong Li,Xiaoyu Meng
Functionalized metal-organic frameworks (MOFs) are being extensively developed as viable fillers to enhance the proton conductivity of proton exchange membranes . Herein, an amino-pendant sulfonic acid bi-functionalized MOFs material (UNCS)-doped SPEEK membrane with low degree of sulfonation (DS) can improve the proton conductivity as well as maintain the membrane dimensional stability. UNCS can act as bridges of proton donors and acceptors to reduce the activation energy barrier and shorten the distance of long-range proton conduction. Among all as-prepared membranes, SPEEK/UNCS-3 exhibited the highest proton conductivity of 186.4 mS·cm −1 at 75 °C and 100% relative humidity (RH), which is much greater than that of pristine SPEEK and Nafion 117. Benefiting from the acid-base pair interaction between the amino groups of UNCS and the sulfonic acid groups of SPEEK, the dimensional stability and mechanical properties of the composite membranes were enhanced. More interestingly, STEM-HAADF and SAXS characterization consistently revealed that UNCS served as bridges among proton channels in the composite membranes for continuous proton transport.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Xiaomei Ning,Liang Zhan,Xiaosong Zhou,Jin Luo,Yanli Wang
The performances of glycerol electro-oxidation reaction (GOR) and formic acid electro-oxidation reaction (FAOR) catalyzed by Pt catalyst were dramatically improved by adding Bi 3+ into the reaction solution. The dynamic structure and microenvironment of in-situ Bi-modified Pt and their impact on the catalytic performances were revealed. A strong correlation was established between the Bi coverage of Pt-based catalysts and their resistance to CO poisoning and performance in GOR and FAOR. When Bi 3+ increased to a certain amount, a Bi-shell containing hydroxides was formed on Pt surfaces except the formation of Pt-Bi ensemble. On Pt catalyst covered with 43.9 % Bi, the peak mass-specific activities of GOR and FAOR in forward scans were 4.2 and 34.7 times that of Pt/NCNTs, respectively. The peak electrochemical active surface area (ECSA)-specific activity of FAOR in forward scan for Pt with 52.6 % Bi coverage was 80.6 times that of Pt/NCNTs. The dehydrogenation process in FAOR and the 4-electron pathway in GOR were improved for Bi-modified Pt. The experimental results and DFT calculations indicated that the positively charged Bi and structure of Pt-Bi ensemble improved the adsorption and interaction of negatively charged intermediates, and the enhanced hydroxides facilitated the oxidation and removal of toxic intermediates, such as CO.
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PubMed
高影响因子
BIOMEDICINE & PHARMACOTHERAPY
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2023
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IF 7.5
Xianghao Lin,Xiaojuan Zou,Baifei Hu,Dongyun Sheng,Tianxiang Zhu,Mingzhu Yin,Hui Xia,Haiming Hu,Hongtao Liu
This study aimed to evaluate the preventive effect of Bi Xie Fen Qing Yin (BXFQY) decoction on hyperuricemic nephropathy (HN). Using an HN mouse model induced by oral gavage of potassium oxonate and adenine, we found that BXFQY significantly reduced plasma uric acid levels and improved renal function. Further study shows that BXFQY suppressed the activation of the NLRP3 inflammasome and decreased the mRNA expressions of pro-inflammatory and fibrosis-associated factors in renal tissues of HN mice. Also, BXFQY prevented the damage to intestinal tissues of HN mice, indicative of suppressed colonic inflammation and increased gut barrier integrity. By 16 S rDNA sequencing, BXFQY significantly improved gut microbiota dysbiosis of HN mice. On the one hand, BXFQY down-regulated the abundance of some harmful bacteria, like Desulfovibrionaceae, Enterobacter , Helicobacter, and Desulfovibrio . On the other hand, BXFQY up-regulated the contents of several beneficial microbes, such as Ruminococcaceae, Clostridium sensu stricto 1 , and Streptococcus . Using gas or liquid chromatography-mass spectrometry (GC/LC-MS) analysis, BXFQY reversed the changes in intestinal bacterial metabolites of HN mice, including indole and BAs. The depletion of intestinal flora from HN or HN plus BXFQY mice confirmed the significance of gut microbiota in BXFQY-initiated treatment of HN. In conclusion, BXFQY can alleviate renal inflammation and fibrosis of HN mice by modulating gut microbiota and intestinal metabolites. This study provides new insight into the underlying mechanism of BXFQY against HN.
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PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Nan Wang,Shangming Huang,Hanwei Cai,Xidong Lin,Riguo Mei,Ning Wang
Due to the toxicity of heavy metal ions which impacts on public health and the environment, the development of effective methods of detection has assumed a high priority. In this study, we have established an electrochemical sensor based on a CoCu-MOF/polyaniline (CoCu-MOF/PANI) sensing electrode that can simultaneously detect Pb 2+ and Cd 2+ in water samples. The CoCu-MOF/PANI composite was prepared by a one-step in situ polymerization method and characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR). The Pb 2+ and Cd 2+ content was detected by differential pulse voltammetry (DPV) at an optimized pH (4.5). The proposed electrochemical sensor has achieved simultaneous Pb 2+ and Cd 2+ detection down to 0.39 ug/L (Pb 2+ ) and 0.61 ug/L (Cd 2+ ). Anti-interference and reproducibility experiments have been conducted. In spiking experiments, the recovery of Pb 2+ and Cd 2+ in water samples ranged from 98.6% to 102.13%, indicating effective targeted electrochemical sensing. This work has delivered a functional design of CoCu-MOF/PANI materials, and established an efficient methodology for heavy metal ion detection.
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Advanced Healthcare Materials
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2024
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IF 10
Tingting Hu,Lu Jia,Heng Li,Chunyu Yang,Yuening Yan,Huiming Lin,Feng Zhang,Fengyu Qu,Wei Guo
Phototherapy and sonodynamic therapy (SDT) are widely used for the synergistic treatment of tumors and have received considerable attention. However, an inappropriate tumor microenvironment, including pH, H 2 O 2 , oxygen, and glutathione levels, can reduce the therapeutic effects of synergistic phototherapy and SDT. Here, a novel Bi-based soluble microneedle (MN) is designed for the CT imaging of breast tumors and starvation therapy/gas therapy-enhanced phototherapy/SDT. The optimized Bi/BiVO 4 Schottky heterojunction serves as the tip of the MN, which not only has excellent photothermal conversion ability and CT contrast properties, but its heterojunction can also avoid the rapid combination of electrons and hole pairs, thereby enhancing the photodynamic/sonodynamic effects. A degradable MN with excellent mechanical properties is fabricated by optimizing the ratios of poly(vinyl alcohol), poly(vinyl pyrrolidone), and sodium hyaluronate. Glucose oxidase (GO x ) and diallyl trisulfide are loaded into the MN to achieve tumor starvation and gas therapy, respectively; And the controlled release of GO x and H 2 S can be achieved under ultrasound or near-infrared laser irradiation. The in vitro and in vivo results demonstrate that this multifunctional MN can achieve high therapeutic efficacy through starvation therapy/gas therapy-enhanced phototherapy/SDT. The designed multifunctional MN provides a prospective approach for synergistic phototherapy and SDT.
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PubMed
高影响因子
ELECTROCHIMICA ACTA
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2014
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IF 4.086
Hong Tao,Wanping Chen,Jing Wang,Weijun Ke,Jiawei Wan,Jionghua Wu,Guo-jia Fang
Size controllable anatase TiO 2 microspheres with compact nano-aggregate structures are synthesized via a facile and low-temperature solvothermal treatment. The diameters of as-prepared products can be controlled to vary from 250 to 1100 nm. Different kinds of TiO 2 microsphere films are built on the top of TiO 2 nanoparticle underlayer to prepare a type of bi-layer anodes. It is illustrated that this type of TiO 2 microsphere scattering layer can not only increase the absorption of light, but also improve the carrier transport and charge collection efficiency of dye sensitized solar cell (DSSC). Therefore, an optimized efficiency of 8.20% is achieved for DSSC with a scattering layer consisted of 500 nm TiO 2 microspheres. Then we further optimize the interface of TiO 2 microsphere scattering layer through TiCl 4 treatment and Mg 2+ modified TiCl 4 treatment. TiCl 4 treatment can improve the dye adsorption and connections between the TiO 2 microspheres. However, it also generates more surface defects in the meantime. And through the Mg 2+ modified TiCl 4 treatment, we can increase the dye adsorption density and retard the interfacial charge recombination and decrease the surface defects, simultaneously. As a result, the efficiency of DSSC based on bi-layer anode is enhanced from 8.20% to 9.12%.
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Materials Science & Engineering C-Materials for Biological Applications
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2015
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IF 3.088
Longfei Li,Lin Chen,Huan Zhang,Yongzhen Yang,Xuguang Liu,Yongkang Chen
Temperature and magnetism bi-responsive molecularly imprinted polymers (TMMIPs) based on Fe 3 O 4 -encapsulating carbon nanospheres were prepared by free radical polymerization , and applied to selective adsorption and controlled release of 5-fluorouracil (5-FU) from an aqueous solution. Characterization results show that the as-synthesized TMMIPs have an average diameter of about 150 nm with a typical core–shell structure, and the thickness of the coating layer is approximately 50 nm. TMMIPs also displayed obvious magnetic properties and thermo-sensitivity. The adsorption results show that the prepared TMMIPs exhibit good adsorption capacity (up to 96.53 mg/g at 25 °C) and recognition towards 5-FU. The studies on 5-FU loading and release in vitro suggest that the release rate increases with increasing temperature. Meanwhile, adsorption mechanisms were explored by using a computational analysis to simulate the imprinted site towards 5-FU. The interaction energy between the imprinted site and 5-FU is − 112.24 kJ/mol, originating from a hydrogen bond , Van der Waals forces and a hydrophobic interaction between functional groups located on 5-FU and a NIPAM monomer. The electrostatic potential charges and population analysis results suggest that the imprinted site of 5-FU can be introduced on the surface of TMMIPs, confirming their selective adsorption behavior for 5-FU.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Hui Lu,Hongbo Wang,Changfei Gao,Lifen Liu,Tingting Yu,Yihua Li,Shaoying Lin
Lanthanum and cerium are widely used as important raw materials for energy storage batteries due to excellent natural electrical, magnetic, and optical properties. However, with the explosive growth of new energy generation and the environmental degradation-resistant of lanthanum and cerium, it is difficult to balance environmental sustainability and resource scarcity to achieve lanthanum-cerium removal by conventional chelate salt precipitation. Herein, a laboratory-scale self-powered electro-membrane bioreactor (SPEMBR), integrating high-active nitrogen-doped carbon nanotube-loaded iron and molybdenum bimetallic conductive composite electrode membrane (M−N−CNTs@Fe/Mo) by hydrothermal and phase inversion processes was successfully constructed and evaluated for removing lanthanum cerium from industrial wastewater. The prepared bi-functional M−N−CNTs@Fe/Mo5% electrode membrane exhibited a uniform morphology and excellent hydrophilicity, with nano pore lattice spacing only 0.2637 nm. Electrochemical test results demonstrated that the novel electrode indicated excellent redox properties (i 0 = 8.35 × 10 −3 A cm −2 , C dl = 1.13 mF cm −2 ) and efficient electron transfer efficiency (R ct = 4.69 Ω, n = 3.9). Based on optimized conditions (5)% doping ratio, pH = 10, C = 20 mg/L), the SPEMBR assisted by M−N−CNTs@Fe/Mo catalytic electrode membrane achieved approximately complete removal efficiency of lanthanum and cerium (>99.2 %), superior to most publicly available related studies (86.3 %-99.0 %), but with a calculation cost of only $8.54. Identification of membrane interface products and system precipitates demonstrated that the outstanding removal efficiency was attributed to the combined reaction mechanism of electroreduction, electrocoagulation and electromembrane filtration. This work provides a bright application prospect for low-cost and effective removal of lanthanum cerium metal based on electrode membranes.
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CERAMICS INTERNATIONAL
·
2024
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IF 5.1
Muhammad Amin Padhiar,Shaolin Zhang,Fangrong Qin,Minqiang Wang,Yongqiang Ji,Noor Zamin Khan,Nisar Muhammad,Sayed Ali Khan,Jahangeer Ahmed,Shusheng Pan
Lead-free double perovskites (DPs) in the form of two-dimensional (2D) nanosheets (NSs) have emerged as exceptional candidates compared to zero-dimensional (0D) nanocrystals (NCs). This preference is attributed to their intriguing fundamental properties and promising applications in optoelectronics. Notably, NSs offer superior performance due to their enhanced surface passivation capabilities, facilitating more efficient treatment of surface defects and thereby enhancing optoelectronic properties. However, the realization of Cs 2 NaInCl 6 as lead-free DPs NSs is yet to be achieved. In this study, we successfully synthesized Cs 2 NaInCl 6 co-doped with Bi 3+ /Mn 2+ NSs. The two-step solution process synthesis enables us to achieve dimensionality control, progressing from 0D NCs to 2D NSs. Comprehensive optical spectroscopy analyses reveal that the NSs exhibit a suppressed non-radiative decay rate ( Knr ) of 5.03 × 10 −3 ns −1 in contrast to NCs with a Knr of 3.21 × 10 −2 ns −1 . This observation is indicative of a well-passivated surface in NSs. In contrast, NSs with identical composition and surface morphology significantly enhance the photoluminescence quantum yields (PLQYs) up to 73%, which represents the highest PLQYs recorded in Cs 2 NaInCl 6 DPs to the best of our knowledge. Beyond fundamental investigations, the study explores the practical applications of these NSs as anti-counterfeit marks created on a flexible substrate, demonstrating robust emission under UV light. Additionally, the fabrication and testing of a light-emitting diode (LED) showcase the versatility of these NSs in optoelectronic devices. This comprehensive exploration of the optical, morphological, and application aspects of Cs₂NaInCl₆ doped with Bi³⁺/Mn 2 ⁺ NSs contributes valuable insights to the evolving landscape of lead-free perovskite materials, highlighting their potential for diverse technological applications.
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高影响因子
ACS Applied Energy Materials
·
2024
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IF 5.4
Yanting Ma,Yan Tang,Yajuan Xu,Suisui Su,Shuzhen Chen,Shizheng Zheng,Changyuan Hu,Xin Li,Kejie Dai,Rongbin Zhang
Metal oxides are promising alkaline battery electrodes with high theoretical capacity, but the low energy density and poor stability make them far away from actual application. Herein, single Bi-MOF derived ultrastable Bi2O3@C and BiOCl@C anodes are architected via a two-for-one manner. Specifically, optimal Bi2O3@C anode with hierarchical and porous structure delivers high specific capacity (278.3 mAh g–1 at 1 A g–1) owing to the exposed electrochemical active sites, fast charge transfer, and efficient ion diffusion. More importantly, ultrahigh stability (110%, 5000 cycles) is achieved due to the in situ morphological self-optimization and oxygen vacancy creation. Similarly, BiOCl@C anode also displays remarkable capacity and ultralong cycling stability (94%, 15000 cycles) due to the conductive and protective carbon layer, abundant reactive centers, and ion transport channels. Moreover, the in situ phase transition of BiOCl to Bi2O2CO3 also contributes to the outstanding stability. Our work provides rational guidance for architecting high capacitive and ultrastable anodes for aqueous rechargeable alkaline battery.
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Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Wang Lixiang,Ren Qiang,Wang Xiaoli
Through a facile sol-gel method, a novel Z-scheme heterojunction BTMO was synthesized by combining Bi-modified TiO 2 with oxygen-modified graphitic carbon nitride. Bi serves as an electron mediator in the catalyst, facilitating the transfer of excited electrons to MCN-O. Infrared characterization reveals that the doping of O increases the adsorption of peroxymonosulfate by the catalyst, promoting the reaction between electrons on the conduction band of MCN-O and PMS. The as-prepared BTMO Z-scheme heterojunction significantly improved the degradation rate of trichloroethylene was in BTMO/PMS system. TCE degradation efficiency in BTMO/PMS photocatalytic system could reach 99.8 % within 1 hour. According to the results of electron paramagnetic resonance and quenching experiments, sulfate radical and holes are the main reactive species in BTMO/PMS system. This novel photocatalyst also exhibited excellent durability. This work provides a new method for solving environmental problems through visible light photocatalysis.
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高影响因子
POLYMER
·
2024
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IF 4.1
Xiaoyu Luo,Xiangjun Li,Miaomiao Li,Donghai Ding,Libo Tong
Two-dimensional (2D) nanocomposite coatings and superhydrophobic coatings are applied to retarding corrosion of Magnesium (Mg) and its alloys. However, stability of the delicate micro/nanostructure and corrosion durability are still intractable issues. In this work, a bi-layer superhydrophobic coating with excellent corrosion resistance has been successfully constructed on Mg alloy via a facile spray/spin assisted self-assembly technique. The polyurethane (PU) coating containing well-dispersed hydroxylated hexagonal boron nitride (OH-BN) nanoparticles acts as the barrier layer and “adhesive”, while the superhydrophobic modified h-BN (f-BN) nanoparticles serve as the water-repellent surface. In addition, the modifying agents containing dynamic disulfide bonds provide covalent bonding effect to construct a stable superhydrophobic surface. Hence, the obtained coating presents extreme non-wettability with an impressive static water contact angle (WCA) of 155° as well as possesses outstanding anti-water adhesion, anti-fouling and self-cleaning performance. Meanwhile, the designed coating shows excellent corrosion durability, which the value of |Z| f = 0.01 Hz retains at 9.5 × 10 9 Ω cm 2 , higher than PU coating of two orders of magnitude. The developed coating shows promising potentials as a durable protective material for Mg alloy and other metals and alloys, shedding new lights on developing high-performance corrosion resistance technologies.
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危险品化学品经营许可证（带存储）