CRYSTAL GROWTH & DESIGN
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2024
·
IF 3.2
Huiqin Ma,Zhuxiang Mao,Wen Liu,Yahao Zhao,Peng Liu,Difu Zhan,Qian Fu,Yizhong Huang,Changcun Han
ZnIn2S4 (ZIS) is an N-type direct bandgap semiconductor material with a visible light response, which exhibits excellent photocatalytic water-splitting performance. To enhance ZIS-based photocatalysts, heterojunction construction and cocatalyst loading methods have been explored extensively. In this research, a Co9S8/ZnIn2S4 (CS/ZIS) heterojunction was successfully synthesized via a solvothermal method, and then Ni(OH)2 nanoparticles were successfully loaded on CS/ZIS by photodeposition, yielding the Ni(OH)2/CS/ZIS photocatalyst. Our findings reveal tight coupling of ZIS nanosheets with the CS surface, establishing an effectively constructed heterojunction structure that enhances interface charge transfer and light absorption. The synergistic effect of CS and Ni(OH)2 significantly boosts the photocatalytic hydrogen production of ZIS composites. The optimum hydrogen production rate of CS/ZIS is 10.06 mmol·h–1·g–1 and that of Ni(OH)2/CS/ZIS reaches 12.92 mmol·h–1·g–1, a 11.9-fold increase over pure ZIS, with exceptional light stability. Furthermore, we discuss the photocatalytic reaction mechanism based on the experimental and characterization results. This work presents a novel approach to designing highly efficient photocatalysts using ZnIn2S4, aimed at enhancing the conversion of solar energy into chemical energy.
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Materials Today Communications
·
2024
·
IF 3.7
Yu-Qing Zhang,Fu-Kai Yang,Yan-Wei Li,Bing-Tao Gong,Wei-Li Qu,Chao Deng,Zhen-Bo Wang
Designing and synthesizing low-cost, high-performance electrocatalysts remains an important challenge for the commercialization of liquid fuel cells. Herein, a novel PdSnNi hexagonal nanoplates (PdSnNi NPs) alloy catalyst synthesized by a simple wet chemical method is reported for catalyzing formic acid oxidation, which greatly outperforms binary PdSn NPs and Pd/C catalysts, thanks to the synergistic effect of Pd, Sn, and Ni. With the assistance of octadecene and olamine system, a small-size hexagonal nanoplate morphology with high specific surface area was prepared. The electrochemical active area of PdSnNi NPs/C catalyst reaches 124.6 m 2 g −1 Pd , which is 9.5 times that of Pd/C catalyst. The mass activity of PdSnNi NPs/C reaches 2275.4 mA mg −1 Pd , which is 1.3 and 4.5 times that of PdSn NPs/C and Pd/C. Moreover, the stability of PdSnNi NPs/C catalyst is also greatly improved compared with PdSn NPs/C and Pd/C catalysts. It is worth noting that the PdSnNi NPs catalyst reduces the use of precious metal Pd, and the content of metal Pd only accounts for 46.42 % of the total content of metal, which effectively reduces the cost of the catalyst. The research results show that the introduction of Sn and Ni regulates the electronic structure of Pd, increases the active sites of the catalyst, and accelerates charge transfer rate, which lead to a significant improvement in the performance of the catalyst. In summary, this work proposes a novel and efficient Pd-based alloy catalyst for formic acid electrooxidation reaction.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Dashuang Fu,Fang He,Haiyi Tian,Jiahao Li,Jieming Zhang,Zheng Kang,Yunkai Wu,Xu Wang
The development of lead-free dielectric capacitors with high recoverable energy storage density and high energy storage efficiency is important for improving the overall performance of electronic and power systems. BaTiO 3 (BTO) is one of the most common ferroelectric materials and has attracted much attention for energy storage applications in the past decades due to its excellent dielectric and ferroelectric properties. However, high remnant polarization and low electrical breakdown strength of BTO limit its development in energy storage applications. Many efforts (e.g., elements doping, interface/heterostructure, etc.) have been made to improve the energy storage density of BTO thin films. In this paper, Ba 1-x Ni x TiO 3 thin films (x = 0, 0.02, 0.04, 0.06, 0.08; abbreviated as BN x T) were synthesized via sol-gel and spin-coated method. The effect of Ni doping on the structural, dielectric, ferroelectric and energy storage properties of BTO thin films has been studied. The results confirmed that with the increase of Ni doping, a second phase arises and the dielectric constant decreases. While appropriate Ni doping led to the improvement of the breakdown strength, further increase of Ni deteriorated the energy storage because of the high oxygen vacancy. Finally, optimized energy storage performance was obtained for BN 0.04 T thin film: dielectric constant of 401, dielectric loss of 0.002, recoverable energy density of 20.2 J/cm 3 and energy storage efficiency of 83.6% at 965 kV/cm. Meanwhile, the remnant and maximum polarization of the films were 0.06 μC/cm 2 and 50 μC/cm 2 , respectively. BN 0.04 T thin film has an excellent application prospect and is expected to appear as a component in the future composite energy storage film system.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zhuo Chen,Zhiyang Lu,Weijun Tian,Bingkun Liu,Bingjie Huo,Jing Zhao,Mengyuan Zou,Ruijuan Zhang,Xinran Yu,Xinbo Wang
Pyrene (Pyr) and its derivatives are classified as Persistent Organic Pollutants (POPs), which exhibit significant toxicological effects and pose serious threats to ecosystems. Photocatalytic technology is increasingly employed for the remediation of POPs due to its effective and environmentally sustainable degradation capabilities. However, conventional photocatalytic materials, primarily in powder form, face challenges related to separation and recovery from aqueous environments, significantly limiting their practical application. In this study, we successfully synthesized a three-dimensional (3D) porous immobilized photocatalytic material by decorating Ag 3 PO 4 and BiOBr onto Ni foam (NF) using a hydrothermal method combined with continuous ionic layer adsorption. The results demonstrated Ag 3 PO 4 /BiOBr/NF exceptional light degradation capabilities, achieving over 90 % degradation of Pyr, 1-methylpyrene, and 1-hydroxypyrene, as well as over 40 % degradation of 1-nitropyrene under visible light irradiation over a duration of 5 h. Its degradation efficiency decreased by 12.49 % after five cycles, demonstrating its reusability. The roles of superoxide radicals ( O 2 – ) and holes (h + ) were critical in the degradation process. Furthermore, based on experimental findings, we proposed a Z-type heterojunction degradation mechanism for the Ag 3 PO 4 /BiOBr/NF composite, accompanied by an analysis of the potential degradation pathways for Pyr. Consequently, the recyclable immobilized photocatalytic materials developed in this research contribute novel insights into the photocatalytic degradation of POPs.
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Energies
·
2024
·Vol. 17
·期 6
·1449
·
IF 3
Qiong Li,Yu Wang,Ganghui Wei,Xiaorong Fang,Ni Lan,Yonggang Zhao,Qiming Liu,Shumei Lin,Deyan He
The preparation of composite carbon nanomaterials is one of the methods for improving the electrochemical performance of carbon-based electrode materials for supercapacitors. However, traditional preparation methods are complicated and time-consuming, and the binder also leads to an increase in impedance and a decrease in specific capacitance. Therefore, in this work, we reduced Ni-Cu nanoparticles on the surface of nitrogen-doped carbon nanofibers (CNFs) by employing an electrostatic spinning method combined with pre-oxidation and annealing treatments. At the same time, Ni-Cu nanoparticles were vulcanized to Ni–Cu–S nanoparticles without destroying the structure of the CNFs. The area-specific capacitance of the CNFs/Ni–Cu–S–300 electrode reaches 1208 mF cm−2at a current density of 1 mA cm−2, and the electrode has a good cycling stability with a capacitance retention rate of 76.5% after 5000 cycles. As a self-supporting electrode, this electrode can avoid the problem of the poor adhesion of electrode materials and the low utilization of active materials due to the inactivity of the binder and conductive agent in conventional collector electrodes, so it has excellent potential for application.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Fangshuo Jia,Yujuan Zhang,Xiutang Zhang,Tuoping Hu
Methanol oxidation reaction (MOR) and urea oxidation reaction (UOR) can be utilized as effective alternatives to the anodic oxygen evolution reaction (OER) in overall water-splitting. Nevertheless, the development of cost-effective, highly efficient and durable electrocatalysts for MOR and UOR remains a significant challenge. Herein, the Ohmic junction (Ni-CuCoN 0.6 @CC) comprising CuCoN 0.6 nanosheets and Ni nanoparticles anchored on carbon cloth (CC) was successfully synthesized via a two-step hydrothermal process followed by pyrolysis. The Ni-CuCoN 0.6 @CC demonstrates exceptional performance in both MOR (1.334 V@10 mA cm −2 ) and UOR (1.335 V@10 mA cm −2 ), coupled with outstanding durability, maintaining 88.70 % current density for MOR and 88.92 % for UOR after a rigorous 50-h stability test. Furthermore, the Ni-CuCoN 0.6 @CC demonstrates a high selectivity for oxidizing methanol to formic acid, achieving Faraday efficiencies exceeding 90 % at various current densities in the context of MOR. The outstanding performance of Ni-CuCoN0 .6 @CC in terms of MOR and UOR either surpasses or closely approaches the levels reported in previous literature, primarily due to the synergistic effect resulting from the Ohmic junction: in this system, Ni serves as the principal active component, Co augments catalytic activity and diminishes onset potential, while Cu enhances long-term durability. Moreover, CuCoN 0.6 nanosheets effectively modulate electronic structure and optimize the morphology of Ni, leading to the exposure of numerous defects that provide a wealth of active sites for the reaction. Additionally, the exceptional hydrophilic and aerophobic surface promotes enhanced mass transfer. Density functional theory (DFT) calculations show that Ni-CuCoN 0.6 @CC enhances reactant adsorption and product desorption, reducing energy barriers and expediting MOR and UOR kinetics.
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PubMed
高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 36
·15093-15100
·
IF 3.5
Fang Wu,Yuhong Jiao,Jin-long Ge,Yujun Zhu,Chao Feng,Zhong Wu,Qiu Li
Facilitating the surface reconstruction of pre-catalysts has been considered an effective strategy for constructing low-cost and highly efficient OER electrocatalysts. Metal doping is a feasible way to activate the surface reconstruction, thus enhancing the OER performance. Herein, we report a facile hydrothermal method to synthesize a series of Zn-doped Ni-MOF on nickel foam (NiZn-MOF/NF) as promising pre-catalysts toward the oxygen evolution reaction (OER). The Zn leaching of NiZn-MOF/NF can promote the surface self-reconstruction of NiZn-MOF/NF into oxygen-vacancy-rich NiOOH after electrochemical activation. Benefiting from the optimized electronic structure, abundant defects, more accessible active sites, and enhanced electrical conductivity, the reconstructed metal oxyhydroxide hybrids exhibit better electrocatalytic activity than the catalysts transformed from Ni-MOF/NF without Zn doping. The optimized NiZn-MOF/NF-OH as an OER catalyst has an overpotential of 336 mV at 100 mA cm−2, and a Tafel slope of 65.9 mV dec−1, as well as stability over 12 h. This work reveals that Zn cation-doping/leaching induces the surface reconstruction of pre-catalysts for enhanced oxygen catalytic activity, which provides a new approach for the development of advanced electrocatalysts.
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Energy Technology
·
2024
·
IF 3.6
Xueli Zhang,Shan Hu,Fangyuan Zhang,Shuchen Xing,Huilin Hu,Jinhua Ye,Defa Wang
As a promising technology to mitigate global carbon emissions, photothermal catalytic CO 2 reduction remains a great challenge in increasing the conversion efficiency and regulating the product selectivity. Herein, a series of phase-separated Ni–Mo alloy catalysts for efficient photothermal CO 2 reduction with tunable CO selectivity is reported. With the increase of Mo content, the evolution rate and selectivity of CO increases. The optimal catalyst Ni 1 Mo 1 achieves 32.1% CO 2 conversion with 98.0% of CO selectivity and 71.1 mmol g cat −1 h −1 of CO evolution rate under a 300 W xenon lamp irradiation. Further increasing the Mo content reduces the CO evolution rate while maintaining the high CO selectivity. In the mechanistic study, it is revealed that the Ni–Mo alloy with an appropriate Ni/Mo ratio (e.g., Ni 1 Mo 1 ) possesses a modified electronic structure with more negative d-band center, which increases the light absorption, reduces the H 2 dissociation, and favors the CO desorption, thereby leading to efficient and selective photothermal reduction of CO 2 to CO. In this work, a viable strategy to design nickel-based catalysts is provided for efficient and selective photothermal CO 2 reduction via composition-mediated modification of electronic structure.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
·
IF 4.1
Ting Lu,Xinyan Xiao,Fei Wang,Xia Cheng,Yu Zhang
A novel BiOBr/Ni-MOF composite was fabricated by in-situ growth of BiOBr nanosheets on Ni-MOF through a convenient precipitation process. The optimal photocatalytic performance was achieved with a Ni-MOF mass content of 45 wt% in the BiOBr/Ni-MOF composite. This composite exhibited remarkable efficiency, degrading 98.33 % of Rhodamine B in 90 min, surpassing the degradation rate constants of pristine BiOBr and Ni-MOF by 4.2 and 160 times, respectively. The superior performance was primarily ascribed to the efficient separation of photogenerated carriers facilitated by the formation of heterojunctions. Additionally, the increased specific surface area and pore structure provided numerous adsorption and active sites. Radical scavenger experiments and electron spin resonance experiments further revealed that O 2 − and h + played crucial roles in the degradation process. Furthermore, the structural properties of the prepared photocatalysts and the effects of different photocatalytic conditions on the degradation of RhB were investigated. This work offers an alternative perspective on the design and fabrication of BiOBr-based composite photocatalysts.
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MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
·
2025
·
IF 2
Guiqun Liu,Boyu Zhang,Heming Wang,Qisheng Ma,Guanglei Lv,Xiaoli Zhang,Yishan Wu,Ding Li
In the present study, Ni-P-CS composite coating was prepared on Q235 carbon steel surface by electroless plating method. Candle soot (CS) is the soot produced by incomplete combustion of candles, and it is mainly composed of amorphous carbon and carbon nanoparticles. The results show that: the results indicated that the corrosion resistance of the Ni-P deposit improved with the incorporation of candle soot (CS). The electrochemical test of Q235 carbon steel, Ni-P and Ni-P-CS with 3.5% NaCl solution was performed at room temperature. The test results show that the protection efficiency of the new coating (Ni-P-CS) reaches 78.5%. Compared with the Ni-P coating with the protection efficiency of 47.08%, its corrosion resistance increased by 31.42 percentage points. This study demonstrates for the first time that Ni-P-CS composite coating is a feasible method for metal corrosion prevention, with inexpensive raw materials and easy preparation. It provides a novel idea for petroleum, chemical and other metal anticorrosion fields.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zhengang Zhou,Junjie Zheng,Lingyu Shao,Xiao Zhang,Chengjin Pan,Xiuqi Hu,Kai Feng,Hao Song,Shihan Zhang,Chenghang Zheng,Xiang Gao
Catalytic solvent regeneration has garnered significant attention due to its capacity to lower energy demands in industrial processes, promoting broader adoption of carbon capture systems. While progress has been made in catalyst engineering, creating efficient solid acid catalysts still encounters critical obstacles such as synthesizing mesoporous architectures with extensive surface areas and improving the spatial arrangement of active sites. Herein, this study developed a Ni/Fe@KIT-6 catalyst with ordered porosity and dual metal acid sites, leveraging the three-dimensional cubic pore structure of mesoporous silica to enhance liquid-solid mass transfer. The anchored Ni/Fe clusters synergistically enhanced proton transfer, reducing the activation energy of carbamate decomposition through optimized intermediate adsorption configurations. Catalytic testing revealed a 58.1 % enhancement in CO₂ desorption efficiency alongside a 41.2 % decrease in energy requirements relative to non-catalytic systems. The material maintained stable performance across multiple absorption-desorption cycles (efficiency decline <10 %), linked to the KIT-6 framework's retained structural stability and optimized metal-support bonding. Theoretical calculations revealed that the Ni/Fe dual sites lowered the CO 2 desorption reaction energy barrier, aligning with the enhanced CO₂ desorption efficiency. This synergistic interaction of dual metal acid sites within a high-surface-area architecture highlights viable pathways for scalable and energy-efficient CO₂ desorption, thereby advancing practical strategies for large-scale deployment of carbon capture technologies.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yunlong Yao,Peng Zhang,Yao Wang,Zhou Du,Zhichao Sun,Ying-Ya Liu,Anjie Wang
This study investigates the catalytic hydrogenation of biomass-derived furfural to value-added products, especially tetrahydrofurfuryl alcohol and furfuryl alcohol. A series of Ni-Fe-Al composite catalysts were synthesized through co-precipitation and subsequent hydrogen reduction. Among these, the Ni 5 Fe 1 Al 2 catalyst demonstrated extraordinary catalytic performance, achieving complete furfural conversion and 92.9 % tetrahydrofurfuryl alcohol selectivity under mild conditions (50 °C, 0.5 MPa H 2 ). Comprehensive characterization using XRD, TEM, and XPS revealed that the optimized Ni 5 Fe 1 Al 2 –400 catalyst possessed high dispersion and abundant oxygen vacancies. The addition of pyridine in the feed had a great impact on the hydrogenation rate of furfuryl alcohol but much less on that of furfural. With pyridine in the feed, the main product shifted from tetrahydrofurfuryl alcohol to furfuryl alcohol, while maintaining complete furfural conversion and achieving 97.5 % furfuryl alcohol selectivity at 50 °C. The Ni 5 Fe 1 Al 2 –400 deactivated in the 50-h run and can be regenerated by simple in-situ reduction, demonstrating excellent regenerability. These findings provide valuable insights into the design of efficient catalysts for selective biomass conversion.
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