Nano-Micro Letters
·
2023
·Vol. 16
·期 1
·1-21
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IF 26.6
Zhao Tianbao,Jia Zirui,Liu Jinkun,Zhang Yan,Wu Guanglei,Yin Pengfei
Electromagnetic wave (EMW) absorbing materials have an irreplaceable position in the field of military stealth as well as in the field of electromagnetic pollution control. And in order to cope with the complex electromagnetic environment, the design of multifunctional and multiband high efficiency EMW absorbers remains a tremendous challenge. In this work, we designed a three-dimensional porous structure via the salt melt synthesis strategy to optimize the impedance matching of the absorber. Also, through interfacial engineering, a molybdenum carbide transition layer was introduced between the molybdenum selenide nanoparticles and the three-dimensional porous carbon matrix to improve the absorption behavior of the absorber. The analysis indicates that the number and components of the heterogeneous interfaces have a significant impact on the EMW absorption performance of the absorber due to mechanisms such as interfacial polarization and conduction loss introduced by interfacial engineering. Wherein, the prepared MoSe 2 /MoC/PNC composites showed excellent EMW absorption performance in C , X , and K u bands, especially exhibiting a reflection loss of − 59.09 dB and an effective absorption bandwidth of 6.96 GHz at 1.9 mm. The coordination between structure and components endows the absorber with strong absorption, broad bandwidth, thin thickness, and multi-frequency absorption characteristics. Remarkably, it can effectively reinforce the marine anticorrosion property of the epoxy resin coating on Q235 steel substrate. This study contributes to a deeper understanding of the relationship between interfacial engineering and the performance of EMW absorbers, and provides a reference for the design of multifunctional, multiband EMW absorption materials.
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Small
·
2023
·
IF 13.3
Jinchang Xu,Jiaxi Ruan,Yongqi Jian,Jiayu Lao,Zilong Li,Fangyan Xie,Yanshuo Jin,Xiang Yu,Ming-Hsien Lee,Zhenyou Wang,Nan Wang,Hui Meng
To overcome the low efficiency of overall water splitting, highly effective and stable catalysts are in urgent need, especially for the anode oxygen evolution reaction (OER). In this case, nickel selenides appear as good candidates to catalyze OER and other substitutable anodic reactions due to their high electronic conductivity and easily tunable electronic structure to meet the optimized adsorption ability. Herein, an interesting phase transition from the hexagonal phase of NiSe (H-NiSe) to the rhombohedral phase of NiSe (R-NiSe) induced by the doping of cobalt atoms is reported. The five-coordinated R-NiSe is found to grow adjacent to the six-coordinated H-NiSe, resulting in the formation of the H-NiSe/R-NiSe heterostructure. Further characterizations and calculations prove the reduced splitting energy for R-NiSe and thus the less occupancy in the t 2g orbits, which can facilitate the electron transfer process. As a result, the Co 2 -NiSe/NF shows a satisfying catalytic performance toward OER, hydrogen evolution reaction, and (hybrid) overall water splitting. This work proves that trace amounts of Co doping can induce the phase transition from H-NiSe to R-NiSe. The formation of less-coordinated species can reduce the t 2g occupancy and thus enhance the catalytic performance, which might guide rational material design.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Changcheng Cui,Junjie Fu,Dongxing Kou,Yimeng Li,Hao Wei,Zucheng Wu,Wenhui Zhou,Zhengji Zhou,Shengjie Yuan,Yafang Qi,Shuping Pang,Zhipeng Shao,Sixin Wu,Guanglei Cui
The Cu 2 ZnSn(S,Se) 4 solar cells (CZTSSe) are emerging as a hot area of low-cost thin film photovoltaic technology owing to its non-toxicity and excellent photoelectric properties. However, the large open-circuit voltage deficit ( V oc,deficit ) caused by the inherently defective CdS/ CZTSSe heterojunction interface is still a huge challenge for improving power conversion efficiency. Herein, we reconstruct the heterojunction interface by inserting a CZTSSe:In into the CdS/CZTSSe heterojunction through an In 2 Se 3 post-deposition treatment. The local occupation of In 3+ at Zn 2+ and Sn 4+ sites decreases the disordered Zn- and Sn-related deep defects and generates benign In Zn donors within CZITSSe transition layer simultaneously, which effectively enhances the surface p-to-n conversion. The combination of chemical and field-effect passivation regulates the charge extraction and passivates the charge recombination. As a result, the In element-buried absorber enables the V oc boost from 488 to 527 mV with an impressive active-area efficiency of 13.59 %. These results demonstrate the great potential of the In element-buried absorber in alleviating the V oc,deficit and enhancing the performance of CZTSSe solar cells.
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Small
·
2023
·
IF 13.3
Kaili Wu,Chaojie Lyu,Jiarun Cheng,Zhonglu Guo,Hongyu Li,Xixi Zhu,Woon-Ming Lau,Jinlong Zheng
Exploring and developing novel strategies for constructing heterostructure electrocatalysts is still challenging for water electrolysis. Herein, a creative etching treatment strategy is adopted to construct NiSe 2 /Ni 0.85 Se heterostructure. The rich heterointerfaces between NiSe 2 and Ni 0.85 Se emerge strong electronic interaction, which easily induces the electron transfer from NiSe 2 to Ni 0.85 Se, and tunes the charge-state of NiSe 2 and Ni 0.85 Se. In the NiSe 2 /Ni 0.85 Se heterojunction nanomaterial, the higher charge-state Ni 0.85 Se is capable of affording partial electrons to combine with hydrogen protons, inducing the rapid formation of H 2 molecule. Accordingly, the lower charge-state NiSe 2 in the NiSe 2 /Ni 0.85 Se heterojunction nanomaterial is more easily oxidized into high valence state Ni 3+ during the oxygen evolution reaction (OER) process, which is beneficial to accelerate the mass/charge transfer and enhance the electrocatalytic activities towards OER. Theoretical calculations indicate that the heterointerfaces are conducive to modulating the electronic structure and optimizing the adsorption energy toward intermediate H * during the hydrogen evolution reaction (HER) process, leading to superior electrocatalytic activities. To expand the application of the NiSe 2 /Ni 0.85 Se-2h electrocatalyst, urea is served as the adjuvant to proceed with the energy-saving hydrogen production and pollutant degradation, and it is proven to be a brilliant strategy.
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Batteries & Supercaps
·
2023
·
IF 5.7
Weiquan Liang,Mingjie Liu,Xiaoyan Shi,Bin Chen,Lianyi Shao,Junling Xu,Zhipeng Sun
Graphical A solvent-free method was used to realize the efficient component regulation of target multivariate MOFs/MXene-derived multi-metal selenides@C/MXene (NCMS@C/MX) composites. The electrochemical performance of these composites can be optimized due to the intrinsic characteristics of the containing metal selenides. Metal-organic frameworks (MOFs) are excellent precursors for electrode materials preparations. Synergistic effects may exist between different metal centers in multivariate MOFs, making them often more effective than single-metal MOFs. Herein, we propose an atom economic mechanochemical method to realize the efficient component regulation of target multivariate MOFs. Moreover, by combining the synthesis of multivariate MOFs and exfoliating MXene, multivariate MOF/MXene composites can be obtained via a one-step strategy. A further selenization process can derive them into selenides@C/MXene composites. These derived composites contain multiple nanostructured metal selenides embedded in multi-heteroatom doped carbon matrix. For these composites, abundant heterojunction structures are formed, which can build internal self-built electric field and enhance the reaction kinetics effectively for sodium-ion storage. More importantly, the electrochemical performance of NCMS@C/MX composites can be optimized due to the intrinsic characteristics of the containing metal selenides. Overall, experimental results demonstrate the universality of this solvent-free synthesis route for controllable preparation of high-performance selenides@C/MXene electrode materials. It provides a feasible and environmentally friendly method to adjust metal ratios for optimal energy storage performance. We hope this research inspires optimization strategies for high-performance electrode materials and leads to the development of energy storage materials with more rational structures and better performance.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Jingwei Liang,Shaobin Li,Fengbo Li,Li Zhang,Yufeng Jiang,Huiyuan Ma,Kun Cheng,Liang Qing
The pursuit of cost-effective catalysts for electrocatalytic overall water splitting continues to present a significant challenge in the field. A molybdenum (Mo)-regulated Co 9 Se 8 /FeNiSe self-supporting electrode material with rich vacancy defects has been prepared by hydrothermal reaction. Doping of Mo atoms not only can form rich selenium vacancy defects to enrich the inherent activity of the catalyst, but also expose more active sites. The intrinsic electronic architecture of the interface catalysis is regulated and optimized through the introduction of heteroatom Mo, resulting in the exceptional catalytic activities of the Mo-Co 9 Se 8 /FeNiSe heterostructure. Additionally, the Faraday efficiency of hydrogen (H 2 ) and oxygen (O 2 ) production approaches 100 %. The voltage required for the water-splitting system is only 1.58 V (10 mA cm −2 ), and 100 h stability test at 100 mA cm −2 demonstrates no decay. This work presents a new perspective for the reasonable design and synthesis of non-precious metal selenide-based bifunctional electrocatalysts.
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MICROCHEMICAL JOURNAL
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2023
·
IF 4.8
Jiajia Yang,Xiaodan Zhang,Yuming Huang
Convenient and reliable tetracycline hydrochloride (TC) detection is necessary due to its harmfulness. Herein, Se-doped ZnMn 2 O 4 /nitrogen carbon (NC) catalyst was effectively synthesized through step-by-step calcination in an N 2 atmosphere, which possessed enhanced oxidase mimetic activity. After Se doping, the oxidase-like activity of the catalyst is 2.75-fold and 1.64-fold higher than that of the Zn-Mn ZIF precursor and ZnO/MnO/NC, respectively. The Michaelis–Menten constant for Se-doped ZnMn 2 O 4 /NC with TMB substrate is 0.047 mM, which has higher affinity towards TMB than other manganese-containing materials. More oxygen vacancy in Se-doped ZnMn 2 O 4 /NC was recognized as the main sites for activating oxygen to produce reactive oxygen species to oxidize TMB. Based on the inhibitory effect of TC on the colorimetric system of TMB/Se-doped ZnMn 2 O 4 /NC, a simple method for TC detection was proposed with a wide linear range of 2–100 µM and 100–500 µM and a low detection limit of 0.88 µM. The method exhibited good selectivity to TC among some ions and antibiotics, and TC in the practical water samples was successfully detected.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Zi-Chen Wang,Xiao-Di Jiang,Yu-Xian Duan,Xu Wang,Zhen-Hua Ge,Jin-Ming Cai,Xiao-Ming Cai,Hong-Lin Tan
Tin selenide exhibits outstanding thermoelectric properties. Among its various forms, multicrystalline SnSe stands out as a more practical choice compared to single-crystal SnSe, owing to its straightforward chemical synthesis process, enhanced processability, and scalability. Herein, we synthesized p-type polycrystalline Sn 1−x Ag X Se bulk materials (x = 0, 0.01, 0.015, 0.02, 0.025, 0.03) using a simple hydrothermal and hot pressing method. Characterization methods such as XRD , Raman and XPS were used to demonstrate the successful doping of Ag + into the SnSe matrix. When the doping concentration reached Sn 0.98 Ag 0.02 Se (x = 0.02), Ag + reached the optimal concentration in the SnSe matrix, causing significant lattice distortion which increased phonon scattering and lowered the thermal conductivity , resulting in Sn 0.98 Ag 0.02 Se achieving ZT max = 1.14. However, when the doping concentration exceeded Sn 0.98 Ag 0.02 Se (x > 0.02), excess silver ions precipitated, partially acting as charge carriers, leading to a significant increase in electrical conductivity , resulting in Sn 0.97 Ag 0.03 Se having an electrical conductivity of 6860 s/m at 773 K. Compared to the pure phase, the electrical conductivity of Sn 0.97 Ag 0.03 Se increased by 259 %, and the ZT value of Sn 0.98 Ag 0.02 Se increased by 178%. This work demonstrates that Ag + is an effective p-type dopant in the SnSe system and indicates that high ZT values in SnSe can be achieved through a simple, low-cost, and environmentally friendly method.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Liang Li,Shao-zhong Hu,Ting Huang,Nan Zhang,Yong Wang
Constructing heterogeneous catalyst with different bandgaps is a prospect way to realize efficient charge transfer of catalytic redox reaction. Semiconductor-based catalyst as a prospective material can effectively solve sewage issues under light irradiation, but the efficiency is greatly influenced by the recombination rate of photoelectrons and holes. In this work, cerium dioxide (CeO 2 ) nanoparticles (NPs) were grown in-situ on carbon nanotubes (CNTs), which can maintain the pollutant removal efficiency of pure CeO 2 NPs and enhance the adsorption intensity under visible light for CeO 2 @CNTs composite. Furthermore, the introduction of cadmium selenide (CdSe) was conducive to establish built-in electronic field in the ternary CeO 2 @CNTs/CdSe catalyst, which effectively enhanced the catalytic activity of CeO 2 @CNTs/CdSe. In comparison to CNTs, CdSe, CeO 2 and CeO 2 @CNTs composite, the ternary CeO 2 @CNTs/CdSe catalyst exhibited higher photocurrent intensity, lower recombination of photoelectrons and holes (e - /h + ) pairs, indicating much better photocatalytic activity. CeO 2 @CNTs/CdSe as photocatalyst displayed excellent adsorption ability for Congo red (CR), which contributed to increase the transparency of reaction solution and improve the utilization rate to light, the evaluated degradation efficiency of CR achieved 83.58 % and the reduction ratio of Cr(VI) was nearly 100 %. This work confirms that CeO 2 @CNTs/CdSe composite with excellent adsorption and photocatalytic ability is a promising photocatalyst material in wastewater treatment.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2023
·
IF 3.3
Wen Zheng,Li Li,Yaobing Fang,Wenhui Yuan
The creation of innovative anodes to replace graphite in lithium-ion batteries (LIBs) is necessary to meet the rising demand for energy storage devices. Based on the large Li storage capacity, transition metal selenides (TMSs) draw considerable interest for LIBs. However, volume expansion of TMSs during the cycling process hinders their large-scale commercial application for LIBs. Herein, the NiSe 2 particle grown in situ on the porous carbon framework (NiSe 2 @C) is prepared by selenization of metal-organic frameworks (MOFs) in an argon atmosphere. NiSe 2 @C exhibits a high reversible Li storage capacity (770 mAh g −1 at 200 mA g −1 after 100 cycles), long cycling life (308 mAh g −1 at 1 A g −1 after 1000 cycles), and good rate capability (214 mAh g −1 at 5.0 A g −1 ). The long cycling performance can be attributed to the fact that NiSe 2 @C can withstand volume expansion during the Li + insertion and desertion process. Furthermore, cyclic voltammetry (CV) tests at various scan rates are conducted to investigate the kinetics of NiSe 2 @C for LIBs, indicating that the Li storage behaviour of NiSe 2 @C is primarily controlled by the capacitive process. The fabrication of the TMS@C composites by selenization of MOFs is a potential way to obtain anodes for high-performance Li storage.
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CHINESE JOURNAL OF CATALYSIS
·
2023
·
IF 16.5
Chun Yin,Fulin Yang,Shuli Wang,Ligang Feng
Efficient heterogeneous catalysts play a very important role in the value-updated green hydrogen production from urea-containing wastewater. Herein, NiSe 2 /MoSe 2 heterostructured catalyst with optimized interfacial electron redistribution and urea adsorption energies via a strong built-in electric field was demonstrated effective for the urea-assisted water splitting reactions. Efficient catalytic performance was found on NiSe 2 /MoSe 2 hybrid microsphere owing to the combined merits such as the unique structure features, the strong synergetic coupling effects, the increased active sites, and the high amount of intrinsic Ni 3+ species. Excellent urea oxidation activity was found to drive 10 mA cm −2 at the potential of 1.33 V when loaded on the glassy carbon electrode, and a cell voltage of 1.47 V was required in the NiSe 2 /MoSe 2 ||Pt/C urea-water electrolyzer to drive 10 mA cm −2 , about 220 mV less than that of water electrolysis, indicating a less energy consumption technique during the electrolysis. The spectroscopic and theoretical analysis revealed the effective synergy of the Ni–Se bond and Mo–Se bond that would be promising for efficient catalyst system construction.
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ACS Nano
·
2023
·
IF 17.1
Chao Li,Yuxing Wu,Qinjun Chen,Yifan Luo,Peixin Liu,Zheng Zhou,Zhenhao Zhao,Tongyu Zhang,Boyu Su,Tao Sun,Chen Jiang
Reperfusion injury presents a significant obstacle to neuronal survival following successful recanalization in ischemic stroke, which is characterized by intricate pathophysiological processes comprising numerous interconnected pathways. Oxidative stress-induced neuronal ferroptosis and the overactivation of glial cells play important roles in this phenomenon. In this study, we developed a targeted cross-linked micelle loaded with idebenone to rescue the ischemic penumbra by inhibiting neuronal ferroptosis and glial overactivation. In rat models, the CREKA peptide-modified micelles accumulate in the damaged brain via binding to microthrombi in the ipsilateral microvessels. Upon reactive oxygen species (ROS) stimulation, diselenide bonds within the micelles are transformed to hydrophilic seleninic acids, enabling synchronized ROS consumption and responsive drug release. The released idebenone scavenges ROS, prevents oxidative stress-induced neuronal ferroptosis, attenuates glial overactivation, and suppresses pro-inflammatory factors secretion, thereby modulating the inflammatory microenvironment. Finally, this micelle significantly reinforces neuronal survival, reduces infarct volume, and improves behavioral function compared to the control groups. This pleiotropic therapeutic micelle provides a proof-of-concept of remodeling the lesion microenvironment by inhibiting neuronal ferroptosis and glial overactivation to treat cerebral ischemia-reperfusion injury.
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