CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Xiaohua Wang,Yanwei Li,Guang Sun,Jianliang Cao,Yan Wang
The pressing demand for environmental and health safeguarding has spurred intense enthusiasm among researchers to delve into metal oxide semiconductors (MOSs) based gas sensors. Particularly, the accurate detection of trace hydrogen sulfide (H₂S), which has drawn growing attention, has become a focal point. Herein, a molybdenum (Mo) doping strategy was presented to enhance the H₂S-sensitive properties of In₂O₃ nanomaterials to detect the presence of 1 ppm H₂S at comparatively lower temperatures. The Mo-doped In₂O₃ cubic nanoparticles (Mo-In₂O₃ CNPs) were synthesized through a hydrothermal route using In(OH) 3 as a precursor. When used as a sensitive material for the detection of H₂S, the Mo–In₂O₃ CNPs have shown some impressive improvements compared to pure In₂O₃ counterparts, including a reduction in working temperature (240 °C vs 300 °C), an increase in sensitivity (18.46 vs 11.34 for 20 ppm H₂S), a better selectivity (6.2 vs 2.84 times to ethanol), and a lower limit of detection (0.79 vs 0.47 ppm). Even to 1 ppm H₂S, the Mo-In₂O₃ sensor can give a response of 2.18, signifying its application feasibility in detecting trace amounts of H₂S. The multiple sensitization effects and their potential mechanism of Mo-In₂O₃ CNPs were discussed in detail.
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NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Zhen Yang,Xian Dong,Longchao Liang,Zhuo Chen
The excellent adsorption potential of poly (ionic liquid)s was utilized in amino-functionalized poly (ionic liquid)s (PVABn) materials constructed for the efficient adsorption of volatile organic compounds (VOCs). 1-Vinyl-3-(3-aminopropyl)-imidazolium bromide was synthesized in a quaternization reaction using 1-vinylimidazole and 3-bromopropylamine hydrobromide as raw materials. Four PVABn adsorbents (PVABn-2, PVABn-3, PVABn-4, and PVABn-5) with micro-mesoporous structures were prepared by polymerization with various concentrations of divinylbenzene cross-linker (molar ratios 2:5, 3:5, 4:5, and 5:5, respectively). Preliminary static adsorption experiments with PVABn-x were conducted for five volatile organic compounds (VOCs): chloroform, toluene, diethyl ether, acetone, and acetaldehyde. The resulting demonstrated that PVABn-x exhibited significantly higher adsorption capacity for acetaldehyde than for the other VOCs and materials hosted many chemically active sites, which provided substantial adsorption capacity for acetaldehyde gas. PVABn-4 showed the greatest capacity of 310.8 mg/g, thus overcoming the limitation of insufficient specific surface area. Kinetic and isotherm studies showed that adsorption conformed to the Bangham kinetic model and the Freundlich isotherm model, indicating that it was mainly driven by physical processes. Cyclic adsorption on PVABn-4 was investigated using high-temperature nitrogen purge desorption. After five adsorption–desorption cycles, adsorption had decreased to 288.9 mg/g, which is >90% of the initial value and therefore indicates excellent stability and renewability. This work offers an effective design strategy for high-performance, reusable PIL-based adsorbents, with great promise for VOCs capture and environmental remediation.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Guidong Xu,Shuo Geng
Activating the inert basal plane of MoS 2 is considered to be an efficient strategy to enhance the HER activity of MoS 2 . Herein, the adjacent S sites in the basal plane were activated by doping cu into MoS 2 nanosheets (cu-MoS 2 ). The density functional theory (DFT) calculation and experimental results show that the electronic structure of S sites adjacent to cu was adjusted. Furthermore, the ∆GH* of adjacent S sites around cu in the basal plane is closer to zero, indicating that the adsorption of H on MoS 2 was also optimized. Benefiting from the activation of adjacent S sites around cu in the basal plane, the obtained cu-MoS 2 nanosheets exhibit a small overpotential of 172 mV to achieve 10 mA cm −2 in acid media with a low Tafel slope of 49 mV decade −1 . This strategy, which involves doping-triggered activation of adjacent inert active sites, can be expanded to other two-dimensional materials for boosting electrocatalytic activity
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JOURNAL OF THE CHINESE CHEMICAL SOCIETY
·
2025
·
IF 1.5
Lan Zhang,Zhipeng Zou,Baofei Hao,Huizhong Ma
In this study, Bi 2 WO 6 /BiOBr S-scheme heterojunction composites were synthesized via a one-step solvothermal method. The experimental results demonstrate that the Bi 2 WO 6 /BiOBr composites exhibit a significant redshift in the light absorption edge and a reduction in bandgap compared with that of individual Bi 2 WO 6 and BiOBr. Meanwhile, the separation and transfer of photogenerated carriers were accelerated in Bi 2 WO 6 /BiOBr composites. In the photocatalytic degradation of tetracycline, the best composite displayed the highest photocatalytic activity, achieving a degradation efficiency of 91.3% after 60 min of light irradiation. Moreover, it maintained good stability even after four cycles. The enhancement in photocatalytic activity is primarily attributed to the formation of the S-scheme heterojunction and the strengthened interfacial interactions.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Rui Li,Jingjing Peng,Fangxia Xie,Qing Xi,Jilong Qin,Houfen Li,Yawen Wang,Jianxin Liu,Xiaoli Ma,Xiuping Yue
Semiconductor photocatalytic oxygen evolution via water splitting is one of the most effective ways to address energy and environmental challenges. However, rapid recombination of photogenerated electrons and holes limits the performance of single photocatalysts. Herein, we employed a facile alcoholysis-calcination method to synthesize BiOBr/BiVO 4 S-scheme heterojunction photocatalysts through the in situ conversion of BiOBr. This preparation method ensures intimate contact between BiOBr and BiVO 4 , establishing an electronic transfer channel that reduces the charge transfer distance and enhances charge transfer capabilities. Simultaneously, we used density functional theory (DFT) calculations and in situ X-ray photoelectron spectroscopy (XPS) to analyze charge transfer behavior. The results show that the S-scheme heterojunction promotes photogenerated electrons to transfer from the conduction band (CB) of BiVO 4 to the valence band (VB) of BiOBr. This transfer process facilitates efficient charge separation and enhances the system’s redox capabilities. Under simulated sunlight irradiation, the BiOBr/BiVO 4 photocatalyst exhibits excellent photocatalytic oxygen evolution activity, with a rate of 266.38 μmol·g -1 ·h -1 and a photocurrent density of 1.8 μA·cm⁻². This corresponds to a 1.60-fold enhancement over pristine BiOBr and a 2.20-fold increase relative to BiVO 4 . Finally, the possible reaction mechanism has also been discussed. This work has provided valuable insights for the effective design of Bi-based S-scheme catalysts, which play a critical role in facilitating efficient directional transfer of photogenerated charges.
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SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Yimeng Yang,Jiaqi Lou,Duo Qi,Chengji Zhao
The rapid development of wearable electronics is driving the exploration of flexible and transparent humidity sensors . However, the limited humidity response and mechanical flexibility of sensitive materials hinder the normal operation of the device. In this research, flexible humidity sensors with a fast response time (1 s) were prepared using transparent imidazolium-based hyperbranched poly(ionic liquid)s (HPIL). The sensor performance was improved by regulating the counter anions with different hydrophobicity , such as trifluoromethanesulfonimide ion (TFSI - ). The HPIL-TFSI sensor featured an improved response under low humidity condition (6%∼33% RH) with good linearity, excellent bending humidity response, mechanical stability , and long-term stability over a wide humidity range from 6% to 98% RH. Moreover, accurate sensing was achieved for respiratory monitoring, non-contact sensing, and detecting moisture on patched skin. The HPIL-TFSI sensor paves the way for the production of high-performance wearable sensor platforms.
研究领域:
材料科学
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电子工程
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Journal of Energy Storage
·
2025
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IF 9.8
Yuan Li,Chenyao Wang,Yuanzhi Zhu,Delong Xie,Xinzhi Chen,Yi Mei
With high theoretical energy density and low cost, lithium‑sulfur batteries are viewed as next-generation energy storage technologies. But issues like the polysulfide shuttle effect and electrolyte safety concerns hinder their commercialization. Here, we present a novel cathode-supported black phosphorene modified composite polymer solid electrolyte membrane (CS-BP-CPSEM) made from polyethylene oxide-polyvinylidene fluoride polyblend and black phosphorene. Black phosphorene nanosheets, produced via electrochemically assisted liquid-phase exfoliation, are uniformly dispersed in the composite polymer matrix and directly multilayer tape-cast onto the cathode surface. This design improves interfacial contact and Li + transport. The optimized CS-BP-CPSEM with 0.3 wt% BP shows a 5.37 V electrochemical stability window and 1.3 × 10 −3 S cm −1 ionic conductivity at 60 °C. Polysulfide adsorption tests confirm black phosphorene's strong anchoring ability, effectively lessening the shuttle effect. Consequently, the assembled all solid-state lithium sulfur battery (ASSLSB) delivers a high discharge capacity of 1322 mAh g −1 and maintains 453 mAh g −1 after over 100 cycles at 0.05C. This work offers a promising interfacial engineering strategy using two-dimensional materials to boost high-energy-density and long-cycle-life solid-state Li-S battery development.
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RSC Advances
·
2025
·Vol. 15
·期 21
·16799
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IF 4.6
Yijian Zhou,Mengting Ji,Shengqian Liang,Jiahang Song,Haotian Wu,Enzhou Liu,Bing Wang,Chen Wang,Bo Zhou,Zhuo Li
Constructing S-scheme heterojunctions is an effective strategy to enhance charge separation efficiency. In this study, for the first time, boron subphthalocyanine bromide (SubPc-Br) was formed by self-assembly on the surface of layer BiOI to form an S-scheme heterojunction (SubPc-Br/BiOI) through halogen bonding and π–π stacking interactions. Experimental results demonstrate that the SubPc-Br/BiOI composite enhances tetracycline removal efficiency by a factor of 1.6 compared to pure BiOI. Notably, after five cycles, the composite still maintains a high tetracycline removal rate, which is 2.62 times that of pure BiOI. DFT and TDDFT theoretical calculations, combined with synchrotron X-ray photoelectron spectroscopy (XPS) under simultaneous illumination, indicate that the internal electric field generated between the [Bi 2 O 2 ] layer and the SubPc-Br macrocycle plays a dominant role in charge separation, while interfacial electron transfer contributes to the constitution of the S-scheme heterojunction. Moreover, the combination of molecular dynamics simulations (MD), Fukui function calculations, and HPLC-MS detection reveals the mechanism of pollutant degradation. This study introduces an innovative strategy for the construction of BiOI-based S-scheme heterojunctions. Constructing S-scheme heterojunctions is an effective strategy to enhance charge separation efficiency.
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JOURNAL OF LUMINESCENCE
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2025
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IF 3.6
Yikun He,Yongheng Fu,Danni Yan,Shuai Yang,Li Zhang,Jiajun Xu,Feifan Song,Xiaokun Zhang,Yuhui Dong,Yousheng Zou
In recent years, Ag-In-Ga-S (AIGS) quantum dots (QDs) have received widespread attention as non-toxic and environmentally friendly QDs. However, the low photoluminescence quantum yield (PLQY) restricts the further application of AIGS QDs in optoelectronic devices. Here, we constructed quinary Ag-In-Zn-Ga-S (AIZGS) QDs with outstandingly high PLQY of 92.1% by doping Zn into AIGS QDs via an economical and environment-friendly hydrothermal method. The synergistic action of the internal doped Zn providing radiative recombination channels and the surface doped Zn passivating the non-radiative recombination defects leads to enhanced PLQY of QDs. The corresponding QDs backlight films fabricated based on AIZGS QDs and polyvinyl alcohol (PVA) also show a high PLQY of 82.7%. The improved PLQY of AIZGS QDs is comparable to other toxic metal-containing QDs in the same spectrum. Furthermore, the PL peak wavelength of the QDs can be tuned from 545 nm to 616 nm by varying the Ag/In ratio. The realization of high PLQY in aqueous AIZGS QDs and its backlight films contributes to the application in the field of eco-friendly backlight display devices.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
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IF 9.9
Yong Lu,Gaohong Wu,Xiaohui Zhao,Xiaoxu Wang,Wenming Zhang,Zhanyu Li
Due to their high reactivity and theoretical capacity, chalcogen elements have been favored and applied in many battery studies. However, the high surface charge density and high solubility of these elements as electrode materials have hindered their deeper exploration due to the shuttle effect. In this article, organic structural triphenylphosphine is used as a molecular main chain structure, and chalcogen elements O, S, and Se are introduced to combine with P as active sites. This approach not only takes advantage of the beneficial effects of the aromatic ring on the physical and chemical properties of the chalcogen element but also allows for the optimization of its advantages. By utilizing Triphenylphosphine selenide (TP-Se) as the cathode material in aluminum-ion batteries(AIBs), a high-performance Al-organic battery was fabricated, which exhibited a high initial capacity of 180.6 mAh g −1 and stable cycling for up to 1000 cycles. Based on density functional theory (DFT) calculations, TP-Se exhibits a smaller energy gap, which renders it favorable for chemical reactions. Moreover, the calculated results suggest that TP-Se tends to undergo redox reactions with AlCl 2 + . The molecular structure of triphenylphosphine and its combination with Se offers an enticing pathway for designing cathode materials in aluminum-organic batteries.
研究领域:
材料科学
·
电化学
·
能源存储
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JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Chong Wang,Gaoyu Chen,Juanrong Kou,Xianju Zhang,Xiangxing Xu,Jianchun Bao,Zihan Shen,Xin Jin,Huigang Zhang,Li Liu,Kehan Yu
Antimony (Sb) is a competitive candidate for lithium ion batteries (LIBs) as anode material because of its high theoretical discharge capacity (660 mAh/g). However, it remains a challenge caused by the volume change in the process of charge and discharge, which would damage the Sb anode that lead to poor rate performance and low cycle stability. Herein, we report the synthesis of Sb@S–N–C nanocomposite as the anode material to solve the problem. First, SbSI nanowires with diameter of ∼10 nm were synthesized. Then the SbSI nanowires were coated with polypyrrole (PPy) to form SbSI@PPy core-shell nanowires. By thermal reduction of SbSI@PPy, Sb@S–N–C nanocomposite was formed. Using the Sb@S–N–C nanocomposite as the anode material, a capacity of 536 mAh/g was obtained in 100 cycles at 0.5 A/g. Excitingly, it also exhibited superior reversible and long-cycle non-decay stability with the capacity of 342 mAh/g in 2000 cycles at a high current density of 1A/g.
研究领域:
材料科学
·
能源科学
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Yan Ge,Caiyi Fan,Qiyue Zhang,Hui Yang,Saisai Yuan,Bin Xu
In situ synthesis of S-scheme COF/Ce-MOF heterojunctions significantly enhances photocatalytic H 2 O 2 production under ambient conditions. The directional charge separation, precise band alignment, and synergistic dual active sites of the heterojunction enable efficient, stable, and selective H 2 O 2 generation. The CRM (Ce-MOF/COF) heterojunction delivers an H 2 O 2 yield that is 11.2-fold higher than pristine Ce-MOF and 3.1-fold higher than pure COF. Moreover, the CRM heterojunction maintains excellent productivity over a 6-h reaction period. In situ X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) analyses revealed not only the elemental composition and chemical states at the heterojunction interface but also the interfacial electronic redistribution and band alignment responsible for the enhanced photocatalytic performance. Specifically, the combined experimental and theoretical results confirmed the presence of strong interfacial coupling, the formation of an internal electric field, and the establishment of an S-scheme charge transfer pathway, all of which contribute to efficient charge separation and the preservation of high redox potentials, thereby enabling superior H 2 O 2 generation activity. Overall, this work not only deepens the understanding of MOF-based photocatalysts but also provides valuable design principles for constructing next-generation heterojunction materials with superior efficiency in photocatalytic H 2 O 2 production for environmental remediation.
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