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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BIOSENSORS & BIOELECTRONICS
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2021
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IF 10.618
Xiang Wang,Xin Yan,Bin-cheng Wang,Wei Xue,Chang-ren Zhou,Yi Zhang,Zong-hua Liu
Blood lead poisoning is a universal and severe health problem that greatly threatens human health in various industries. Elimination of blood lead relying on chelating agents and combination with hemoperfusion adsorbents has achieved considerable progress, but it is still suffering from the compromised selectivity of adsorbents as well as in absence of real time monitoring during treatment. Herein, we proposed a selective blood lead adsorbent integrated with real-time visualized/electrochemical bi-modal monitoring based on TMPyP-bound guanosine-borate (GB) supramolecular hydrogel as potential smart hemoperfusion device. The GB hydrogel possessed stability in physiological environment, self-healing ability resistant to fluid shear, blood compatibility, selective adsorption of lead ions superior to conventional adsorbents, anti-fouling performance to blood components and renewability. Benefiting from binding with TMPyP and the intrinsic conductivity, GB hydrogel was endowed with the ability to qualitatively diagnose the presence of blood lead via simple color change and quantitatively reflect the amount of adsorbed lead from blood accurately through electrochemical technique . This work puts forward an integrated treatment/monitoring hemoperfusion device with high selectivity, simple fabrication and low-cost, providing a paradigm for next generation design of intelligent, monitorable theranostic hemopurification system, which is also an extensible platform for the other research fields such as environmental monitoring and remediation.
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APPLIED SURFACE SCIENCE
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2020
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IF 6.182
Siran Zhang,Kang An,Shuangshuang Li,Ziyang Zhang,Ruolin Sun,Yuan Liu
A new scheme for constructing bi-active sites of highly dispersed Pt and oxygen vacancies on a catalyst was put forward in this study. Pt/LaCo x Ni 1−x O 3 /SiO 2 was synthesized by reducing LaCo x Ni 0.87−x Pt 0.13 O 3 with the structure of perovskite loaded on silica. The catalytic performance for carbon monoxide oxidation over the catalysts were studied. The catalysts were characterized via using XRD, XPS, XAFS, N 2 adsorption–desorption, H 2 -TPR, TEM, O 2 and CO-TPD techniques. The results pointed out that nanocrystal lines of LaCo x Ni 0.87−x Pt 0.13 O 3 were supported on SiO 2 . Pt clusters could be formed through reduction process at 300 °C and highly dispersed on catalyst’s surface, and the catalyst transformed to Pt/LaCo x Ni 1−x O 3 /SiO 2 ; at the same time, oxygen vacancies also formed on the surface of LaCo x Ni 1−x O 3 . The catalytic test revealed that LaCo 0.44 Ni 0.43 Pt 0.13 O 3 /SiO 2 displayed high activity and good stability for the oxidation of CO. The highly dispersed closely contact bi-active sites, the confinement of oxygen vacancies and strong interaction between Pt clusters and support were responsible for the significant catalytic activity and stability of LaCo 0.44 Ni 0.43 Pt 0.13 O 3 /SiO 2 catalyst.
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DYES AND PIGMENTS
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2020
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IF 4.613
Yong Li,Jun-Dan An,Tian-Tian Wang,Yang-Fan Shi,Jian-Zhong Huo,Xiang-Xia Wu,Yuan-Yuan Liu,Bin Ding
In the last thirty years, light-emitting metal organic frameworks (MOFs) sensors have attracted immense interest by scientists because these functional coordination materials possess good framework stability and high surface areas, and excellent stability in adsorption, separation, catalysis, etc. These MOFs-based sensors have the broad applications in the national security, surrounding protection and mankind's health. In this work, a new bi-functional ligand H 3 L (H 3 L = 4'-(1H-tetrazole-5)-biphenyl-2,3-dicarboxylic acid) simultaneously containing tetrazole and carboxylate groups can be synthesized. Further, the ultra-stable tetrazolium Cadmium (II) MOFs {[Cd 2 (μ 7 -L) (μ 3 -OH) (H 2 O) 2 ]·1.3H 2 O} n ( 1 ) has been successfully prepared under the solvo-thermal conditions. In 1 , neighboring tetranuclear cadmium (II) building blocks are inter-linked through the bridging tetrazole moieties and aromatic bi-phenyl backbones forming the 3D micro-porous framework. It is interesting that 1 exhibits excellent chemical stability, the coordination framework of 1 can be kept not only in various different solvents but also the water environment with pH varying from 2 to 12 for 24 h. Powder X-ray diffraction (PXRD) patterns have been investigated demonstrating these bulky as-synthesized samples 1 are pure phases. Compared with other coordination polymers, 1 has some other advantages such that 1 possesses good water dispersibility , excellent photo-luminescence emissions and fluorescence stability, which has the potential to be utilized as the excellent chemical sensor. Fluorescent characterization reveals that 1 also can behave highly sensitive and real-time discrimination of acetylacetone (Hacac) with good reusability (high quenching efficiency K sv for Hacac: 2.5 × 10 5 M −1 ) and extremely low detection limit values (For Hacac: 35 μM). On the other hand, 1 can behave highly sensitivity, recyclability and real-time chemical sensing for antibiotics nitrofurazone (NFZ) and nitrofurantoin (NFT) (K sv for NFZ: 5.9 × 10 6 M −1 and NFT: 9.0 × 10 6 M −1 ) and extremely low detection limit values (For NFZ: 2.2 μM and NFT: 1.4 μM).
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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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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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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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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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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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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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Advanced Healthcare Materials
·
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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