JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Zhiru Li,Ying Lv,Xuelian Chen,Meixia Xiao,Lei Wang,Xiaoxuan Li,Yumin Li
Aiming at the challenges such as wide band gap, limited surface reactivity, and sluggish reaction kinetics of the promising Aurivillius compound Bi 2 O 2 (OH)NO 3 (BON). Our endeavors culminated in the successful creation of layered BON nanoplates featuring surface oxygen vacancies and Pd nanoparticles deposition by UV light irradiation, elegantly designated as Pd-OVs BON. This accomplishment was realized through the adept application of a two-step photoreduction technique, skillfully executed in both pristine water and ethanol-water environments. We then evaluated the effectiveness of Pd-OVs BON in degrading a series of tetracycline antibiotics. Our evaluation involved a comprehensive approach, encompassing systematic morphology characterization and photoelectrochemical analysis. Additionally, we investigated how surface oxygen vacancies and the plasma effects of Pd impact the separation and transport of photogenerated carriers, as well as the photocatalytic performance. The outcomes of this study indicate that Pd-OVs BON holds substantial potential for the photodegradation of antibiotics. Its layered nanoplates structure enhances the specific active surface area of BON, while the surface oxygen vacancies generated through photoreduction create more active sites for catalyzing antibiotic degradation reactions. Furthermore, the introduction of Pd nanoparticles onto the OVs-BON surface during the secondary photoreduction process induces localized surface plasmon resonance. This phenomenon broadens the photocatalyst's responsiveness to a wider range of light wavelengths, enabling efficient utilization of visible light and facilitating the effective decomposition of antibiotic molecules.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Huifang Lv,Haibo Rao,Zhiyu Zhou,Yang Zhao,Hualiang Wei,Zexiang Chen,Xiao Zhang,Yunlu Dai,Yanli Gong,Yan Wang
Improving the energy storage capabilities of aqueous alkaline supercapatteries relies heavily on the development of high-performance anode materials. Here, we presented a one-step composite molten salts method for the preparation of cobalt selenium hydroxide and Bi 2 O 2 Se heterostructure composites (CoSe(OH)/Bi 2 O 2 Se). The composite capitalizes on the advantageous interlayer properties of two-dimensional (2D) layered Bi 2 O 2 Se, connected via weak Van der Waals forces, alongside the high theoretical specific capacity of cobalt hydroxide derived from cobalt selenium hydroxide. This synergy facilitates efficient ion transport, thus exhibiting remarkable electrochemical characteristics. Specifically, CoSe(OH)/Bi 2 O 2 Se demonstrates a great specific capacity of 313.6 mAh/g at 1 A/g, significantly outperforming pure Bi 2 O 2 Se nanosheets. Moreover, CoSe(OH)/Bi 2 O 2 Se exhibits remarkable rate capability with 63.8% capacitance retention at sufficiently high current density (20 A/g), and excellent cycle performance that the capacitance remains is 70.3% after 1000 cycles of GCD testing. Additionally, ex-situ XRD analysis of CoSe(OH)/Bi 2 O 2 Se at different charge and discharge stages provides further insights into its energy storage mechanism. Furthermore, the NiAl-Cl LDH// CoSe(OH)/Bi 2 O 2 Se device demonstrates high power density and energy density. These results validate the feasibility of enhancing the electrochemical performance of 2D Bi 2 O 2 Se layered materials through the incorporation of active and cost-effective transition metal oxides/hydroxides, highlighting the tremendous potential of CoSe(OH)/Bi 2 O 2 Se as a negative electrode material for aqueous alkaline supercapattery.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2024
·
IF 10.8
Na Zhang,Ying Liu,Zhenchen Wan,Yanting Zhang,Wenjing Xie,Peng Zhang,Man Tong,Songhu Yuan
Reactive oxygen species (ROS) production in O2-perturbed subsurface environments has been increasingly documented in recent years. However, the constraining conditions under which abiotic and/or biotic mechanisms predominate for ROS production remain ambiguous. Here, we demonstrate that the ROS production mechanism, biotic and abiotic, is determined by sediment redox properties and sediment compositions. Upon the oxygenation of 10 field sediments, the cumulative H2O2 concentrations reached up to 554 μmol/kg within 2 h. The autoclaving sterilization experiments showed that H2O2 could be produced by both biotic and abiotic processes depending on the redox conditions. However, only the abiotic process could produce significant levels of •OH, and the production yield was closely related to the sediment components, particularly sediment Fe(II) and organic matter. Fe(II) bound with organic matter led to high yields of H2O2 and •OH production. Sediment oxygenation contributed to the appearance of H2O2 in groundwater, with the abiotic mechanism producing higher instantaneous H2O2 concentrations than the biotic mechanism. These findings reveal that the redox conditions, compositions, and texture of sediments collectively control abiotic and biotic mechanisms for ROS production, which assists the identification of ROS production hotspots and the understanding of ROS distribution and utilization in the subsurface.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiazhuo Song,Fang Li,Xinying Zou,Hamed Alshawwa,Minghan Chi,Guinong Qiao,Ruijing Shang-Guan,Wenjun Tang,Lihua Hong,Zhimin Zhang
Limited by local H 2 O 2 concentration and GSH hindrance, chemodynamic therapy (CDT) has poor antibacterial efficiency, and the pro-inflammatory response caused by CDT is often ignored. Here, a hybrid nanozyme (Fe 3 O 4 -CaO 2 -PDA) was synthesized, which has dual regulatory functions of ·OH and GSH, there are two stages in clearing the infection: treatment and repair. In the treatment stage, stimulated by the photothermal generated by near-infrared light (NIR), it rapidly releases a large amount of ·OH and further enhances CDT by decreasing the local GSH concentration to achieve a rapid antimicrobial effect. In the repair stage, the PDA removes the local residual ·OH, prevents over-aggregation of inflammatory cells, and regulates pro-inflammatory responses. In vitro antibacterial experiments showed that the killing rates of the hybrid nanozyme against S. aureus and E. coli were 90% and 92% respectively. At the same time, the DCFH-DA fluorescence experiment showed that the ·OH concentration was significantly controlled. in vivo, due to the function of control ·OH, nanozymes show the ability to promote collagen regeneration and regulate inflammation. In summary, this study proposed a synergistic multiple antibacterial strategy and successfully constructed a PTT-enhanced multifunctional hybrid nanozyme for efficient CDT anti-infective treatment.
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Journal of Energy Storage
·
2025
·
IF 9.8
Shakeel Ahmad,Muhammad Tariq,Umar Farooq,Henmei Ni,Afaq Ullah Khan,Zainab M. Almarhoon,Abdulaziz A. Alanazi,Talal M. Althagafi,Kamran Tahir,Sameerah I. Al-Saeedi
The integration of Cobalt hydroxide fluoride Co( OH )F-based materials is expected to significantly enhance the electrochemical performance of supercapacitor electrodes. In this work, Co( OH )F with various morphologies was synthesized using a simple hydrothermal method and evaluated as an electrode material for supercapacitors. The porous nano square-like morphology exhibited excellent durability in electrochemical reactions, providing abundant active sites. Furthermore, the highly electronegative fluorine atom contributes to fast ion diffusion to electrode surface and reduces intrinsic resistance during the reaction, leading to remarkable electrochemical performance. Remarkably, the optimized Co( OH )F 450 exhibited an ultrahigh specific capacitance of 558 F g −1 at a current density of 1 A g −1 , which is greater than that of Co( OH )F 300 , and Co( OH )F 150 electrodes. Furthermore, the device delivered outstanding cyclic performance, maintaining 80 % capacitance retention after 10,000 charge-discharge cycles. Finally, the Co( OH )F 450 electrode demonstrates a promising energy density of 27 Wh kg −1 at a power density of 2571 W kg −1 . Above results suggest that Co( OH )F 450 electrode could pave way for the development of high-performance electrodes in the field of energy storage.
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ACS Omega
·
2020
·
IF 2.87
Chunmei Xiao,Jianming Lin
The contamination of water systems by heavy metals greatly threatens human health and ecological safety. An efficient adsorbent is critical for the removal of these contaminants. In this work, magnetic Ni3Si2O5(OH)4 nanotubes (NTs) have been synthesized via in situ hydrothermal reduction and further functionalized by grafting poly(4-vinyl pyridine) (P4VP) brushes on its surface via atom transfer radical polymerization. Characterizations by Fourier transform infrared, X-ray diffraction, thermogravimetric analysis, transmission electron microscopy, and X-ray photoelectron spectroscopy proved that P4VP was successfully grafted on the surface of magnetic Ni3Si2O5(OH)4 NTs. The resultant Ni3Si2O5(OH)4-g-P4VP NTs are efficient nanosorbents for removing Cr(VI) anions from water. The Cr(VI) adsorption capacity of Ni3Si2O5(OH)4-g-P4VP NTs reaches 1.49 mmol/g at a pH of 3. The pseudo-second-order kinetic model and the Freundlich isothermal model are suitable to describe the adsorption process. The analysis using Weber–Morris and Boyd models indicates that both intraparticle diffusion and external film diffusion affect the Cr(VI) adsorption process. The adsorption enthalpy is estimated to be 18.37 kJ/mol. More than 90% of the Cr(VI) adsorption capacity of the Ni3Si2O5(OH)4-g-P4VP NTs remains after eight adsorption and desorption cycles.
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高影响因子
FUEL
·
2024
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IF 6.7
Jinhui Song,Tianfu Zhang,Mengjiao Xing,Junfeng Zhou,Lu Tang,Jiaxin Xie,Zimin Peng,Wenyao Gu,Jianyu Tang,Suyao Liu,Tong Chang,Yi Liu,Yiwen Fang
With the potential application of biomass-derived feedstock upgradation to sustainable aviation fuels, it is essential to enhance the hydroisomerization performance of ZSM-22 zeolite while improving its resistance to residual oxygen-containing compounds. As the defect sites in the ZSM-22 zeolite, the abundant Si-OH groups are closely related to the catalytic performance and stability, serving as the main attack sites for the generated water. In this work, liquid-mediated defect-healing treatment is performed to heal Si-OH to Si-O-Si, leading to the enhancement of the crystallinity and pore connectivity without affecting the Si/Al, micropore volume, and morphology and preventing the micropores blockage and dealumination caused by conventional silylation and silication procedures. The outcome of the declined Si-OH groups is the reduction of the Lewis acid site without altering the Brønsted acidity. In the n-dodecane hydroisomerization, the catalyst obtained by the liquid-mediated defect-healing treatment route shows an increased conversion and isomer yield compared to the parent and healed catalysts prepared by other healing methods. This is mainly due to enhanced confinement of the micropore void, resulting in decreased apparent activation energy and reduced yield to multi-branched isomers prone to cracking. Furthermore, the healed catalyst exhibits improved resistance and structure stability in the hydroisomerization of feedstocks containing butanol. The work provides a prospective application of ZSM-22 zeolite in the hydroisomerization for complex and severe reactants through the essential Si-OH healing method.
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CHINESE JOURNAL OF CATALYSIS
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2024
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IF 15.7
Wancheng Zhao,Jiapeng Ma,Dong Tian,Baotao Kang,Fangquan Xia,Jing Cheng,Yajun Wu,Mengyao Wang,Gang Wu
ABSTRACT In order to reduce energy consumption in water electrolysis, it is of great importance to design active and stable electrocatalysts for hydrogen evolution reaction (HER) in alkaline solution, especially based on earth-abundant metal. Here we integrate carbon nanotubes (CNTs) and Ni-Ni(OH) 2 heterostructure multifunctional components to design a self-supported 3D CNTs-Ni-Ni(OH) 2 catalyst for HER by composite deposition and subsequent in-situ oxidation . In alkaline solution, this designed CNTs-Ni-Ni(OH) 2 catalyst exhibits 0 mV onset overpotential, and overpotentials of 65 mV and 109 mV at 10 and 50 mA/cm 2 respectively. Electrochemical measurements, characterizations, and simulation results attribute the outstanding performance to the incorporation of CNTs and heterostructure . CNTs induce the formation 3D catalytic surface, enhance electrochemical active surface area , and more importantly weaken the adsorption of H. Moreover, the formation of heterostructure, especially reversible Ni(OH) 2 , supplies active sites and adjusts the adsorption strength of H atom to an optimal value. CNTs and heterostructure synergistically facilitate water adsorption, promote water dissociation, and accelerate H 2 desorption. Significantly, integration of multifunctional components supplies a distinct strategy for development of cost-effective electrocatalyst with outstanding performance.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
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IF 20.2
Yanyan Liu,Huanhuan Zhang,Jingjing Zhou,Shuyan Guan,Ruofan Shen,Wenbo Zhang,Xia Sheng,Lixia Wang,Xianji Guo,Xianli Wu,Jianchun Jiang,Baozhong Liu,Yongfeng Wang,Baojun Li
Proclaiming the interfacial active sites of non-noble metals on supported catalysts is a paramount topic. Herein, a spin-cross interface (Co(OH) x P y (x/y=3.2)) in the intimate region between Co(OH) 2 and CoP is designed by in situ hydroxylation and P-inducing strategy. An ultra-high catalytic hydrogen generation activity with a turnover frequency of 1640 min −1 is achieved for hydrolysis of ammonia borane (NH 3 BH 3 ). Both experimental observations and computational simulations reveal that the spin-cross interface dramatically reduces the energy barriers for the dissociation of reactant molecules (NH 3 BH 3 and H 2 O) to expedite the catalytic activity . The coexistence of active interface and MXene create the ensembles of Co atoms coordinated by OH and P. The construction of active sites of Co(OH) x P y simultaneously boosts the adsorption and dissociation of H 2 O and NH 3 BH 3 molecules. This research provides new paradigm for the rational design of spin-induced catalysts in the future energy system depending on the activation of multi-molecules.
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Nanoscale
·
2024
·Vol. 16
·期 36
·16933-16941
·
IF 5.8
Xinyu Feng,Siwen Zhang,Jiazhuo Li,Yingfang Hu,Rongyuan Ge,Yaowen Shi,Yali Yao,Bosi Yin,Tianyi Ma
Ni3(NO3)2(OH)4 has a high theoretical specific capacitance, low cost, and environmental friendliness, making it a promising electrode material. Specifically, Ni3(NO3)2(OH)4 electrodes have a larger layer spacing (c = 6.898 Å) than Ni(OH)2 electrodes since NO3− has a much larger ionic radius than OH−. The larger layer spacing stores more electrolyte ions, significantly improving the electrochemical activity of the electrodes. Additionally, the interlayer NO3− can enhance the structural stability of Ni3(NO3)2(OH)4. However, since Ni3(NO3)2(OH)4 has a higher molar mass than Ni(OH)2, it has a lower theoretical specific capacity. Consequently, Ni3(NO3)2(OH)4 has not been used in zinc-based alkaline batteries. Studies showed that doping could enhance the electrochemical performance of electrode materials. Therefore, this study used a simple solvothermal reaction to synthesize yttrium-doped Ni3(NO3)2(OH)4 (Y-Ni3(NO3)2(OH)4), assembling a Y-Ni3(NO3)2(OH)4//Zn battery for electrochemical testing. Y-Ni3(NO3)2(OH)4 served as the cathode in the battery. The analysis of Y-Ni3(NO3)2(OH)4 showed that yttrium (Y) doping increased the specific surface area and pore size of Ni3(NO3)2(OH)4 significantly. The increased specific surface area improved the active material utilization, and the abundant mesopores facilitated OH− transport, substantially enhancing the battery's specific capacity and energy density. Ultimately, the specific discharge capacity of the advanced Y-Ni3(NO3)2(OH)4//Zn battery reached 177.97 mA h g−1 at a current density of 4 A g−1, nearly doubling the capacity of the earlier Ni3(NO3)2(OH)4//Zn battery (103.59 mA h g−1).
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Surfaces and Interfaces
·
2025
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IF 6.3
Yu Yang,Zhikun Xu,Tianle Li,Xinzhi Ma,Shuangyan Lin
The development of versatile oxygen evolution reaction (OER) electrocatalysts for ampere-level seawater electrolysis holds enormous promise for clean energy generation. Still, it is hindered by the competing chlorine evolution and severe chloride corrosion. Herein, the V and Fe dual-doped Ni 3 S 2 /Ni(OH) 2 (VFe-Ni 3 S 2 /Ni(OH) 2 ) heterostructure was fabricated on nickel foam as an OER catalyst for direct seawater electrolysis. The dual-doping of V and Fe optimizes the electronic structure cooperatively, improves conductivity, and enriches active sites of Ni 3 S 2 /Ni(OH) 2 , boosting OER performance at ampere-level current density. The optimal electrode V 0.03 Fe-Ni 3 S 2 /Ni(OH) 2 requires only 385 mV overpotential to arrive 1 A/cm 2 and works stably for over 100 h at 100 mA/cm 2 in seawater electrolyte. The assembled electrolyzer V 0.03 Fe-Ni 3 S 2 /Ni(OH) 2 ||Pt/C exhibited a cell voltage of 1.52 V at 10 mA/cm 2 with a noteworthy stability of 100 h at 100 mA/cm 2 for seawater electrolysis, providing huge potential for hydrogen production from seawater.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2025
·
IF 4.7
Mengyao Hua,Siyi Wang,Meng Cheng,Guangming Liang,Lei Xu,Yafen Zhou
Photocatalysts TiO 2 @UiO-66-(OH) 2 was successfully synthesized via an impregnation method for removal of formaldehyde under high pressure mercury lamp irradiation, and the photocatalysts were characterized by using a variety of analytical techniques. The characterized results indicated that TiO 2 was attached to the surface of UiO-66-(OH) 2 , and there was a strong electronic interaction between the elements of TiO 2 and UiO-66-(OH) 2 in the composite. The synergistic combination of high adsorption capacity of UiO-66-(OH) 2 , high dispersion of TiO 2 and efficient interfacial charge transfer between UiO-66-(OH) 2 and TiO 2 have a significant impact on the enhanced photocatalytic performance for formaldehyde removal. And the hydroxyl radicals (⋅OH) and superoxide radicals (⋅O 2 − ) also play a major role in removal of formaldehyde. The formaldehyde removal rate of 20TiO 2 @UO (1 g 0.15 m 3 ) is 83.01 % within 5.5 h, if the removal time is extended to 24 h, the formaldehyde removal rate can reach 91.49 %, and the continuous photocatalytic reaction showed that the composite is a highly stable catalyst. This could provide a useful method for highly efficient formaldehyde in indoor air purification.
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