POLYHEDRON
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2024
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IF 2.4
Muhammad Jamshaid,Adeel Ahmed,Rashid Iqbal,Ali Fareed,Wedad A. Al-onazi,Mohamed S. Elshikh
The current study focuses on the development of highly efficient nickel oxide/titanium dioxide (NiO/TiO 2 ) p-n heterojunction catalysts constructed via sol–gel and ultrasonic techniques. Different techniques, including XRD, SEM, EDS mapping, and XPS, confirmed the successful synthesis of the photocatalysts. The BET analysis showed that the NiO/TiO 2 heterojunction has a surface area of 107.52 m 2 /g compared to pure NiO and TiO 2 (75.37 m 2 /g and 89.13 m 2 /g) respectively. The catalyst was then implemented to decompose the antibiotic tetracycline (TC) in water under visible light. The outcomes revealed that the degradation rate of TC reached 97.69 % using NiO/TiO 2 , which is substantially greater than the degradation achieved with pure NiO (52.43 %) and TiO 2 (71.11 %) within a 48-minute period pursuant to the most favorable circumstances. The initial rate constant of the NiO/TiO 2 (0.0756 min −1 ) was significantly higher compared to that of the NiO (0.0153 min −1 ) and TiO 2 (0.0261 min −1 ). The lower bandgap energy of the NiO/TiO 2 (3.19 eV) catalyst compared to the pure NiO (3.58 eV) and TiO 2 (3.29 eV) facilitated the abatement of TC due to the improved harvesting of visible light absorption. Furthermore, the study investigated the impact of several different reaction parameters and intervening anions on TC degradation. Radical trapping investigations substantiate the existence of reactive oxygen species. In addition, NiO/TiO 2 catalyst exhibited extraordinary stability and maintained its catalytic efficiency despite enduring five successive cycles. Overall, the NiO/TiO 2 catalyst demonstrated remarkable potential for abolishing TC-contaminated water.
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METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
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2025
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IF 3.1
Zhao Ya,Wu Jijun,Ma Wenhui
The study of diffusive mass transfer of impurity phosphorus (P) in silicon melts was a crucial aspect of achieving efficient deep P removal. To elucidate the mass transfer mechanism of P in silicon melts, this paper presents a kinetic analysis of impurity P removal from silicon melts. To minimize the effects of convection on diffusion, a capillary diffusion device was employed to conduct experimental investigations of P diffusion in silicon melts at different temperatures. According to slag–silicon refining experiments, the mass transfer process of P between the silicon melt and the slag phase was characterized and the mass transfer coefficient of P in the silicon melt was calculated. The experimental results indicated that the diffusion coefficients of P in silicon melt at 1450 °C, 1500 °C, and 1550 °C were 2.81 × 10 −8 , 3.24 × 10 −8 , and 3.91 × 10 −8 m 2 ·s −1 , respectively. Through the calculation of the activation energy for P diffusion, the relationship between the diffusion coefficient and temperature was determined as \(D=1.23\times {10}^{-5}\cdot {\text{e}}^{-\frac{\text{87,260}}{RT}}\) . At a refining temperature of 1550 °C, the mass transfer coefficient of P in the silicon melt was found to be 2.11 × 10 −5 m·s −1 when calcium silicate slag was used for slag refining. These findings provided essential kinetic data, including diffusion and mass transfer coefficients, to support the advanced removal of impurity P from metallurgical-grade silicon (MG-Si).
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NEW JOURNAL OF CHEMISTRY
·
2024
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IF 2.7
Guangyu Deng,Chunmiao Xia,Xiangyu Nie,Sheng Xu,Cuige Zhang,Yinsheng Fang,Rongli Zhang
Photocatalytic degradation is a promising way for removing industrial pollutants from wastewater. However, selective enrichment and removal of target pollutants especially at ultralow concentrations are extremely challenging. Herein, a highly selective and efficient strategy for photocatalytic degradation of an organic pollutant, p-nitrophenol (PNP), is developed based on photosensitive molecularly imprinted polymer nanoparticles and TiO2 photocatalyst functionalized fiberglass cloth (FGC). The negatively charged p-nitrophenol@photosensitive random copolymer nanoparticles (PNP@PAVE NPs) and the positively charged TiO2 NPs were used as building blocks to successively deposit on the surface of FGC, followed by the removal of the PNP through UV radiation, leading to the formation of PNP-MIP NP and TiO2 NP decorated FGC (TiO2/PNP-MIP NPs/FGC) with high selectivity and photocatalytic activity. As a result, TiO2/PNP-MIP NPs/FGC exhibited a removal rate of 98.7% and excellent selectivity for PNP. This work provides a valuable approach for realizing highly selective degradation of specific pollutants in complex pollutant mixtures in a real environment.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Mengqi Bian,Rui Liu,Qinghai Zhang,Yunlong Qu,Guanghui Chen,Jihai Duan,Hui Zhao,Weiwen Wang
The one-step preparation of methacrylic acid from isobutylene presents a significant challenge. In this study, three-dimensionally ordered macroporous (3DOM) Mo-V-P-Ce was synthesized using the hard template method and employed as a carrier for heteropolyacids in the selective oxidation of isobutene (IBN) to produce methacrylic acid (MAA). The CuNH 4 PAV@3DOM Mo-V-P-Ce catalyst developed through this method exhibits an ordered macroporous structure, which significantly enhances its thermal stability. Additionally, it contains a significant number of active species (VO 2 + ) and appropriate moderately strong acidic centers, which collectively improve the overall performance of the catalyst. The combination of CuNH 4 PAV with the 3DOM structure increases the surface concentration of oxygen vacancy species, thereby promoting the catalytic activity of the composite catalyst in converting these oxygen vacancy species into lattice oxygen species. Notably, the selectivity of the synthesized heteropolyacid catalysts for MAA increased to 84 % after loading. This work offers a novel approach to the development of efficient catalysts.
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ADVANCED FUNCTIONAL MATERIALS
·
2024
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IF 18.5
Hongkun Wang,Mingyu Du,Hao Jiang,Ruixuan Zhou,Yan Wang,Kunyan Sui,Wenxin Fan
Ionic diode-based generators show great superiority in harvesting low-frequency mechanical energy from human motions for various wearable applications. The major challenge is to improve their extremely limited output voltage for the miniaturization/simplicity of ionic diode-based self-powered devices as well as further improvement of mechanoelectric conversion performance. Herein, the construction of gradient polycation/polyanion heterojunction is demonstrated to vastly boost the output voltage, energy-harvesting efficiency, and sensing performance of ionic diode. Besides an inherent potential at the polyanion/polycation heterojunction interface, the additional transmembrane potentials can be generated across gradient polyanion and polycation conductors of ionic diodes due to their gradient charge distribution. Consequently, the gradient ionic diode-based generators produce much higher output voltage (306.53 mV) than previously reported homogeneous ones (4.1–135 mV). Meanwhile, the high output voltage imparts gradient ionic diode-based generator with ultrahigh power density (50.16 µW cm − 2 or 250.8 µW cm −3 ) and pressure-perception sensitivity (43582 mV/MPa), which are dramatically increased by 162.76% and 128.71%, respectively, compare to those of homogeneous one. Impressively, the resulting diode-based generators can generate ultralarge current density (≈0.52 mA cm −2 ) with ultralong discharge time (>400 s), thus enabling the continuous power generation under the low-frequency pressure for various wearable and implantable applications.
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Surfaces and Interfaces
·
2025
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IF 6.3
Mihong Cao,Lucheng Li,Wenfeng Yuan,Jun Chen
In order to solve the problems of insufficient adsorption electrolyte capacity and small specific surface area caused by the smooth surface and few pores of Super P spherical conductive particles, this work uses concentrated sulfuric acid (H 2 SO 4 ) for surface etching of Super P conductive particles to explore the influence of different etching time on the micromorphology of SP conductive agent and the behaviors of LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NCM-523) batteries. After etched by concentrated H 2 SO 4 , the surface of SP conductive agent changes from “capillary” structure to fluffy “plush” structure, effectively improving the conductivity specific surface area of the conductive agent particles. Compared with the pristne SP-0H conductive agent, the batteries using 1.5% of concentrated H 2 SO 4 etched SP-1H, SP-2H and SP-20H conductive agent have smaller EIS impedance value, larger area of CV curves, and smaller potential difference of the redox peaks. As a result, the initial charging/discharging capacities of SP-1H, SP-2H and SP-20H conductive batteries were 178.7/183.0, 187.6/183.9, 178.9/180.8 mAh/g with corresponding ICE of 102.4%, 98.0% and 101.1% respectively, which were much higher than the pristine SP-0H conductive battery (182.0/173.7 mAh/g with ICE of 95.4%). In addition, the SP-1H, SP-2H and SP-20H batteries also show significantly improved cycle performance and rate cycle capabilities, showing more superior comprehensive behaviors, which can provide a new modification insights for the exploration of new conductive agent in NCM-523 of high-performance lithium ion batteries.
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Journal of Energy Storage
·
2024
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IF 8.9
Qinlian Liu,Xiaojie Tan,Xudong Li,Yiwen Li,Xuan Han,Shihao Cui,Dejian Xu,Yachao Liu,Rui Wang,Qingshan Zhao,Mingbo Wu
Transition metal selenides (TMSs) have emerged as promising electrode materials for potassium-ion batteries (PIBs), whereas the large volume expansion and sluggish reaction kinetics have seriously hindered the cycle life and rate performance. Herein, a hierarchical composite of flower-like CoSe 2 /N, P-doped carbon microspheres accommodated on carbon nanosheets (CoSe 2 -NPC@CNS) was rationally fabricated as the anode for PIBs through a one-pot hydrothermal and subsequent selenization method. The intimate hybridization of CoSe 2 /N, P-doped carbon microspheres can effectively alleviate the volume expansion of CoSe 2 during charge-discharge cycles, and the ultrathin carbon nanosheets derived from fluid catalytic cracking (FCC) slurry serves as a highly conductive and buffered substrate. By robustly merging them together, the interconnected hierarchical nanoarchitecture with exposed active sites achieves promoted potassium storage capacity, electrochemical reaction kinetics, and structural stability. As a result, the PIBs with CoSe 2 -NPC@CNS anode deliver high reversible capacities of 320.8 mAh g −1 after 100 cycles at 0.1 A g −1 and 213.9 mAh g −1 after 850 cycles at 1.0 A g −1 , excellent rate capability (188.8 mAh g −1 at 5 A g −1 ), and enhanced pseudo-capacitive contribution rate of 88.7 %. This work offers valuable insight into the rational design and development of hierarchical anode materials with high performance for PIBs and beyond.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Huanhui Zhan,Ju Liu,Ping Wang,Chenfei Wang,Zhongguo Wang,Muhua Chen,Xinbao Zhu,Bo Fu
In the field of building energy conservation , the development of biodegradable biomass aerogels with excellent mechanical performance, flame retardancy and thermal insulation properties is of particular importance. Here, a directional freeze-drying method was used for fabricating composite sodium alginate (SA) aerogels containing functionalized ammonium polyphosphate (APP) flame retardant . In particular, APP was coated with melamine (MEL) and phytic acid (PA) by a supramolecular assembly process. Through optimizing the flame retardant addition, the SA-20 AMP sample exhibited excellent flame retardant and thermal insulation properties, with the limiting oxygen index of 38.2 % and the UL-94 rating of V-0. Such aerogels with anisotropic morphology demonstrated a low thermal conductivity of 0.0288 (W/m·K) in the radial direction (perpendicular to the lamellar structure). In addition, as-obtained aerogels displayed remarkable water stability and mechanical properties, indicating significant potential for practical applications.
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PubMed
高影响因子
FOOD CHEMISTRY
·
2024
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IF 8.5
Mingyue Ye,Xianfeng Lin,Jin Li,Xiaowan Chen,Dichen Ying,Shijia Wu,Zhouping Wang,Nuo Duan
Malachite green (MG) has been illicitly employed in aquaculture as a parasiticide, however, its teratogenic and carcinogenic effects pose a significant human health threat. Herein, a dual-mode colorimetric and electrochemical aptasensor was fabricated for MG detection, capitalizing on the robust catalytic and peroxidase-like activity of P-CeO 2 NR@Mxene and good capture efficiency of a tetrahedral DNA nanostructure (TDN) designed with multiple aptamers (m-TDN). P-CeO 2 NR@Mxene-modified complementary DNA (cDNA) served as both colorimetric and electrochemical probe. m-TDN was attached to AuE to capture MG and P-CeO 2 NR@Mxene/cDNA. The superior aptamer and MG binding to cDNA regulated signals and enabled precise MG quantification. The further introduced Exo I enabled aptamer hydrolysis, releasing MG for further binding rounds, allowing target recycling amplification. Under the optimal conditions, the aptasensor reached an impressively low detection limit 95.4 pM in colorimetric mode and 83.6 fM in electrochemical mode. We believe this dual-mode approach holds promise for veterinary drug residue detection.
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PubMed
高影响因子
Surfaces and Interfaces
·
2024
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IF 5.7
Lai Liu,Ye Tian,Jiangang Yu,Huizhen Yao
Copper zinc sulphide (CZS) due to high conductivity, fast photoresponse and good stability has attracted rising attention in optoelectronic field. Constructing heterojunctions with rational energy bands alignment can accelerate carrier separation to improve the performance of CZS-based photoelectric device. Herein, p-CZS/n-TiO 2 core-shell nanorods heterojunction film was successfully fabricated for the first time. CZS nanoparticles (NPs) were directly loaded on the surface of TiO 2 nanorods (NRs) through a simple chemical bath deposition. Photoelectrochemical (PEC) photodetector based on CZS/TiO 2 composite film was designed and interfacial charge kinetics has also been investigated. The CZS/TiO 2 PEC device exhibits fast response speed of 95/56 ms, high responsivity of 7.1 mA W -1 and detectivity of 5.6 × 10 12 Jones at a bias voltage of 1 V. The light on/off ratio of self-powered CZS/TiO 2 PEC device achieves 5.6 × 10 3 , nearly 30.4 times higher than bare CZS PEC device. Furthermore, the photodetection performance of the CZS/TiO 2 PEC device can be effectively regulated by light power density and environment conditions, promoting its adaptability in multifarious practical applications. The findings suggest that CZS/TiO 2 heterostructure film devices have great potential for high-performance and energy-efficient PEC photodetectors.
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JOURNAL OF MEMBRANE SCIENCE
·
2024
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IF 8.4
Ying Jie Liu,Xi Bin Yue,Xi Hao Wang,Ze Yu,Li Wei Lai,Guo Liang Zhang,Ai Mei Zhu,Qiu Gen Zhang,Qing Lin Liu
It is an important research topic to construct microphase separation in anion exchange membranes (AEMs). The integration of rigid anthracene units into the main chains to form poly(anthracene- co - p -terphenyl piperidinium) AEMs is a new method by using π-π stacking to regulate microphase separation and construct ion transport channels in membranes. In this study, anthracene units were introduced for the first time to prepare AEMs with different anthracene contents. It is found that the introduction of rigid anthracene units into the backbone leads to an increase in the fractional free volume (FFV) of the membranes and a decrease in the ion conductive resistance. Moreover, the existence of long flexible di-piperidinium side chain helps to adjust the rigidity of the AEMs and enhances the mechanical properties of the membrane. The ionic conductivity of PA10TP-DMP is 153.8 mS cm −1 (80 °C). In the meanwhile, the conductivity retention of 91.7 % was observed after the alkaline resistance test (80 °C, 2 M NaOH) for 1200 h. In addition, the PA10TP-DMP based H 2 –O 2 single cell has a peak power density of 840.3 mW cm −2 and a high durability after 100 h test.
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CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Yimin Zhang,Yonglin Ren,Yun Zu,Ke Yan,Yibin Luo,Enhui Xing,Yucai Qin,Yi Mei,Xingtian Shu
Available hierarchization and phosphorization of ZSM-5 zeolite as one of methanol-to-propylene (MTP) catalysts have improved reactive stability and propylene selectivity, but are subjected to the problems of poor phosphorus stabilization efficiency and inhomogeneous dispersion. Herein, we fabricate a series of hierarchical P@ZSM-5 zeolites via one-step disassembly-reassembly-phosphating strategy of ZSM-5 zeolite using successfully self-created asymmetric quaternary phosphonium hydroxides and elucidate the mechanism of mesoporous formation and the interaction of phosphorus with framework aluminum. Delightfully, reconstructively tetracoordinated P IV -O-Al IV structure endows excellent hydrothermal and Brønsted acid stability of hierarchical P@ZSM-5 zeolites. The MTP tests show that the P@ZSM-5(TBuCP) catalyst prepared by disassembly-reassembly-phosphating of tributylhexadecylphosphine hydroxide (TBuCPOH) exhibits superior propylene selectivity (48.9 %) and remarkedly long lifetime (32.5 h, WHSV=6h −1 ). Such enviable MTP performance is benefited from the join hands of the zeolitic hierarchization and suitable Brønsted acid strength conferred by its phosphorus-aluminum interaction that are conducive to olefinic cycle process. These findings afford value-filled opportunities in novel MTP catalysts with high reactive stability and propylene selectivity, and the understandings for phosphorus-zeolite chemistry.
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危险品化学品经营许可证（带存储）