CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhiang Hou,Jinzhu Yue,Hao Chen,Jinnan Wang,Aimin Li,Philippe François-Xavier Corvini
Endocrine disrupting chemicals (EDCs) interfere with the normal secretion, transport and metabolism of human hormones, thus affecting neurological, reproductive and immune functions. Photocatalysis is regarded as a facile organic degradation technique. The construction of heterojunctions can modulate the reactive oxygen species and enhance the photocatalytic performance of semiconductors. However, poor contact interfaces still severely limit carrier separation and transfer. Herein, we have doped Co to modulate the band structure of Bi 2 O 2 CO 3 while facilitating the in situ growth of BiOI on its surface via shared Bi atoms. This approach led to the development of a 2D/2D Co-Bi 2 O 2 CO 3 /BiOI (Co-BOC/BiOI) S-scheme heterojunction characterized by atomically close contact interfaces. Furthermore, the photo-electrochemical characterization results indicate that the light adsorption capacity, carrier separation and transport efficiency of the optimized Co-BOC/BiOI-3 are greatly improved. This system demonstrates almost 100% removal rate for three typical EDCs within 60 min. The degradation kinetic constants show an improvement by an order of magnitude compared to single BiOI and Bi 2 O 2 CO 3 . More importantly, O 2 •﹣ , which is produced from O 2 reduction on high negative conduction band, can be subsequently oxidized into 1 O 2 by photogenerated hole. Electron paramagnetic resonance and quenching experiments indicate that the organics degradation process is dominated by 1 O 2 . This work offers new insights into the construction of high-quality S-scheme heterojunction interfaces for modulation of reactive oxygen species.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Shuqi Gong,Rongyu Zhang,Chengji Sui,Yunlei Zhou,Zhengkun Yu,Li Ma,Huanshun Yin,Tianyi Sun,Junling Duan
Bi/Bi 2 O 2 CO 3 composite photocatalytic materials with oxygen vacancies were synthesized in one step by a hydrothermal method using bismuth nitrate pentahydrate as the bismuth source and N,N-dimethylformamide as the carbon source and reducing agent. The photocatalytic degradation performance of Bi/ Bi 2 O 2 CO 3 under simulated sunlight was investigated using the environmental hormone pollutant bisphenol A as the degradation target. The results show that the synergistic effect of Bi metal plasmon resonance effect (SPR) and oxygen vacancies promotes the effective separation of photogenerated electrons and holes, which greatly improves the photocatalytic ability. The degradation rate of Bi/Bi 2 O 2 CO 3 for bisphenol A (85.2 %) is 2.67 times higher than that of the single-component material Bi 2 O 2 CO 3 (31.9 %).The effect of external conditions (pH, anions, cations) on the photocatalytic performance was investigated. As well, ESR and active intermediate species capture experiments were performed on the composites, and it was deduced that h + , 1 O 2 , and ·O 2 - were the main reactive substances in this reaction system. And toxicity experiments were conducted on the degradation products, which proved that the toxicity of the degradation products was reduced.
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Journal of Materials Chemistry B
·
2025
·Vol. 13
·期 7
·2533-2548
·
IF 5.7
Mingbo Wu,Dong Li,Yao Liu,Xiaomiao Ruan,Jingwen Yang,Zegang Li,Siyi Chen,Xin Yang,Wenwu Ling
Piezocatalytic therapy is an emerging therapeutic strategy for eradicating drug-resistant bacteria, but suffers from insufficient piezoelectricity and catalytic active site availability. Herein, Bi-vacancies (BiV) and corona polarization were introduced to BiOBr nanosheets to create a BiOBr-BiVP nanoplatform for piezocatalytic antibacterial therapy. This meticulously tailored strategy strengthens the built-in electric field of nanosheets, enhancing piezoelectric potential and charge density and boosting charge separation and migration efficiency. Meanwhile, BiV adeptly adjust the band structure and increase reaction sites. Ultrasonication of nanosheets continuously enables the generation of reactive oxygen species (ROS) and CO, facilitating almost 100% broad-spectrum antibacterial efficacy. BiOBr-BiVP nanosheets demonstrate full bacterial eradication and accelerate wound healing through simultaneous regulation of inflammatory factors, facilitation of collagen deposition, and promotion of angiogenesis. Overall, this ultrasonic-triggered piezocatalytic nanoplatform combines BiV and the corona polarization strategy, providing a robust strategy for amplifying piezocatalytic mediated ROS/CO generation for drug-resistant bacterial eradication.
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ACS Catalysis
·
2025
·
IF 13.1
Jie Ni,Jie Wei,Yeqi Yu,Ming-Hui Fan,Wanting Liu,Kwun Nam Hui,Yan Yan,Yan Liu,Yanqiang Huang,Jie Zeng
Hydroxylamine (NH2OH) is an important nitrogenous feedstock in the production of numerous valuable chemicals. The selective electroreduction of nitrate (NO3–) into NH2OH paves a promising avenue for the synthesis of NH2OH. Bi-based catalysts are regarded as the most promising candidates owing to the weak adsorption for NH2OH, preventing the further reduction of NH2OH. It is worth noting that Bi-based catalysts exhibited a dramatic activity gap in the acid and neutral/alkaline electrolytes toward the synthesis of NH2OH. Unfortunately, the mechanistic origin of pH-dependent NH2OH production has rarely been investigated, lacking an insightful interpretation on the atomic and molecular scale. Herein, taking Bi nanosheets (NSs) as a model catalyst, we investigated the underlying origin of the pH-dependent selectivity in NO3– electroreduction toward NH2OH production. The Faradaic efficiency (FE) for NH2OH of Bi NSs dramatically decreased from 86.6 to 12.0%, with the pH value ranging from 0 to 3. Combining the in situ Fourier transform infrared spectroscopy and theoretical calculations, we revealed that the dominant 4-coordinated hydrogen-bonded water in acid media favored the involvement of *H in the hydrogenation of *NO to *NHO, thereby facilitating the synthesis of NH2OH. Moreover, 10 kinds of amino acids were successfully synthesized by Bi NSs, demonstrating the wide universality of Bi nanosheets for the synthesis of amino acids.
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ACS Applied Polymer Materials
·
2025
·
IF 4.7
Xueliang Feng,Jie-Wei Wong,Mingjin Yang,Qing Zhang,Xiaoxue Liao,Daquan Kek,Zhenzhong Liu,Jize Liu,Chunxin Ma,Qingrong Wei,Tuck-Whye Wong
Intelligent hydrogels can provide various biomimetic actuations in response to external stimuli, but it is still difficult to program their actuating complexity, which severely limits their further applications. Herein, a stimuli-responsive actuating bi-hydrogel with a directional negative layer and a homogeneous positive layer has been explored. The stretched natural rubber latex–polyacrylamide (NRL-PAAm) hydrogel layer can partly maintain this directional structure, which can further integrate with the photothermal-responsive graphene-poly(N-isopropylacrylamide) (G-PNIPAM) hydrogel layer to obtain the anisotropic bilayer hydrogel. First of all, different from bilayer PNIPAM-based hydrogels, which commonly only achieve two-dimensional (2D) complex actuations, this bi-hydrogel can achieve various not only 2D but also three-dimensional (3D) complex programmable actuations, especially because of its double anisotropy of both bilayer and directional structures. Furthermore, this bi-hydrogel can own a rapid actuating speed reaching 27.7°/s of bending and 18.0°/s of folding in response to non-contact near-infrared (NIR) irradiation, mainly owing to the high photothermal conversion efficiency of composited graphene. Last but not least, thanks to the highly enhanced mechanical performance of the directional NRL-PAAm hydrogel layer, this bi-hydrogel is robust, reaching 4.0 times the tensile strength of pure G-PNIPAM, which owns a relatively powerful force to lift more than 50 times its self-weight. This work provides a promising intelligent hydrogel integrating programmable 2D/3D complex actuation, rapid actuating speed, and powerful force, which will also inspire exploration of other soft intelligent materials.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 17
·1-10
·
IF 2.8
Gong Qinglin,Hu Ming
Bi(Mg 0.5 Hf 0.5 )O 3 (BMH) has been frequently exploited to engineer the material’s phase structure, micromorphology, dielectric, piezoelectric, and energy storage performance of BaTiO 3 (BT)-based ceramics for the optimization of multifunctional dielectrics. Herein, combined with the Ba(Ti 0.8 Sn 0.2 )O 3 relaxor, (1 – x )Ba(Ti 0.8 Sn 0.2 )O 3 – x Bi(Mg 0.5 Hf 0.5 )O 3 (BTS- x BMH) ceramic samples were prepared through a solid-state reaction process. The micromorphology, dielectric properties, ferroelectric properties, and energy storage performance of BTS- x BMH ceramics were engineered by increasing BMH content. The addition of BMH can refine the grain size, increase the relaxation degree, raise the breakdown strength, and facilitate the production of the polar nanoregions in the BTS- x BMH ceramics. Compared to pure BTS, the energy efficiency of BTS-BMH is remarkably enhanced, which originates from the disruption of the ferroelectric long-range order owing to the BMH modification. At the maximum applied field of 100 kV/cm, the largest energy density of W rec = 0.3 J/cm 3 was realized at the composition of x = 0.05. The highest energy efficiency of η = 99% was acquired for x = 0.15 at 110 kV/cm. Moreover, the energy efficiency for x = 0.15 displays good temperature stability. These findings can guide the further optimization design of environmentally friendly BT-based ceramic capacitors for energy storage applications.
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FERROELECTRICS
·
2024
·
IF 0.6
Zhao Hong,Xu Dan,Yu Taolin,Duan Xiaoyang,Zhou Xinyuan,Zhao Wenjie,He Jun
The effects of Li/Er and Li/Bi co-substitution on the structure, dielectric, and ferroelectric properties of BaTiO3 (BT) ceramics were investigated and analyzed. X-ray diffraction measurements show that the doped samples have a single tetragonal structure without secondary phases. Rietveld refinement results show that the Li/Er and Li/Bi ions tend to replace A-sites of BT lattices at low doping content. As the doping content increases, the Curie temperature moves to the high-temperature region due to the increased tetragonality and internal stress. Compared with the undoped ceramics, the ferroelectric properties of the doped ceramics are improved. The enhanced remnant polarization is attributed to the combined effects of large grain modulation and defect dipole arrangement.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·Vol. 38
·期 7
·e7542
·
IF 3.7
Zhiwei Liu,Liying Wang,Shanghai Dong,Lu Li,Jingjing Wang,Zhenzhu Cao,Yongfeng Zhang,Lin Cheng,Jucai Yang
Three distinct morphologies of Bi-MOFs were innovatively employed as carriers, facilitating the formation of heterojunctions with BiPO 4 . Among these, the optimal photocatalytic performance was demonstrated by the type II heterojunction BiPO 4 /CAU-17. Bi 3+ competitively coordinated to crucially aid CAU-17's transformation into a heterojunction, enhancing interfacial contact in BiPO4/CAU-17. These photocatalysts effectively degraded dyes (RhB, MO, MB) and tetracycline (TC) under light exposure. RhB degradation was 3.33 times faster with BiPO 4 /CAU-17 than BiPO 4 , 1.45 times faster than FCAU-17, 1.36 times faster than FRCAU-17, and 1.32 times faster than CAU-17. Analyzing carrier density, Fermi level, and band structure through VB-XPS, UV–VIS, and Mott–Schottky provided insights into enhanced separation of photoexcited electron–hole pairs. This study presents a novel approach to tackle the aggregation challenge of the wide-bandgap material BiPO 4 by using suitable MOFs as carriers. It offers valuable perspectives for the design and application of photocatalysts in environmental remediation.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2025
·Vol. 131
·期 10
·1-14
·
IF 2.8
Ning Qiyun,Li Bingwei,Zhou Wang,Xu Xiaoting,Li Jun
In this study, Bi₂O₂Se nanosheets were synthesized via a hydrothermal method, and a Bi₂O₂Se/WSe₂ heterostructure was subsequently constructed using a mechanical compounding approach to develop a photoelectrochemical photodetector. By optimizing the mass ratio and KOH electrolyte concentration, the Bi₂O₂Se/WSe₂ heterostructure exhibited optimal performance at a 7:1 ratio in 0.1 M KOH. Benefiting from the interfacial heterojunction between the two materials, the Bi₂O₂Se/WSe₂ heterostructure achieved a photocurrent density of -2.74 µA/cm² under zero external bias, representing an order-of-magnitude enhancement compared to pristine Bi₂O₂Se nanosheets. Concurrently, the rise time was significantly reduced from 0.86 s to 0.28 s, And the decay time decreased from 4.85 s to 0.32 s, demonstrating superior self-powered characteristics. Furthermore, the Bi₂O₂Se/WSe₂ heterostructure exhibited a maximum photoresponsivity of 61 µA/W. The optimized Bi₂O₂Se/WSe₂ photodetector showed no notable performance degradation during a 10,000 s cyclic on/off illumination test. This work highlights the immense potential of the Bi₂O₂Se/WSe₂ heterostructure-based self-powered photodetector in delivering exceptional self-driven functionality, outstanding optoelectronic properties, and robust stability for practical applications.
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Science Bulletin
·
2025
·
IF 21.1
Hailin Lu,Mengjie Wang,Zhiwei Chen,Gengchen Yu,Yanan Ma,Li Wen,Yang Yue,Siliang Wang
Human-machine intelligent interaction (HMII) technology, which is an advanced iteration of human-machine interaction technology, has garnered widespread attention owing to its significant achievements in healthcare and virtual reality research. Nonetheless, these fields often depend on elaborate multi-sensor integrations and face challenges in achieving precise control over robotic manipulation. Herein, a novel transistor-like iontronics pressure sensor based on an MXene/Bi 2D heterojunction is proposed. This transistor-like, flexible, all-solid-state, self-powered iontronics device exhibited a fast response time (66.59 ms), long lifetime (up to 50,000 cycles), and static/dynamic response with linear sensitivity. A deep-learning-assisted single-device HMII system was further constructed. Crucially, the system is adept at monitoring subtle skin deformations triggered by the median and ulnar nerves, efficient real-time decoding of sophisticated hand gestures (recognition accuracy of 95.83%), and precise control of robotic hands using tactile perception feedback. This approach addresses the inherent redundancy in multi-sensor devices used to decode motion across multiple finger joints, marking a significant step forward for iontronics in enhancing the perceptual interaction between humans and machines.
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Light-Science & Applications
·
2024
·Vol. 13
·期 1
·1-12
·
IF 20.6
Liu Bo-Mei,Lin Yue,Liu Yingchun,Lou Bibo,Ma Chong-Geng,Zhang Hui,Wang Jing
Materials capable of dynamic persistent luminescence (PersL) within the visible spectrum are highly sought after for applications in display, biosensing, and information security. However, PersL materials with eye-detectable and excitation-wavelength-dependent characteristics are rarely achieved. Herein, a nonstoichiometric compound CaGa x O 4 :Bi ( x < 2) is present, which demonstrates ultra-long, color-tunable PersL. The persistent emission wavelength can be tuned by varying the excitation wavelength, enabling dynamic color modulation from the green to the orange region within the visible spectrum. Theoretical calculations, in conjunction with experimental observations, are utilized to elucidate the thermodynamic charge transitions of various defect states, thereby providing insights into the relationship between Bi 3+ emitters, traps, and multicolored PersL. Furthermore, the utility of color-tunable PersL materials and flexible devices is showcased for use in visual sensing of invisible ultraviolet light, multicolor display, information encryption, and anti-counterfeiting. These discoveries create new opportunities to develop smart photoelectric materials with dynamically controlled PersL for various applications.
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Journal of Water Process Engineering
·
2024
·
IF 6.3
Jian Dong,Yi Wang,Liangliang Dong,Tatsuo Kaneko,Weifu Dong,Dongjian Shi,Mingqing Chen
To address the membrane challenges such as the trade-off effect between water permeance and separation selectivity, development of a desirable nanofiltration membrane structure is crucial. And, it is important to design a positively charged surface to enhance charge repulsion force between membrane surface and ions due to lithium (Li) extraction problem as the close hydration diameter of magnesium (Mg) and lithium ions. Herein, a strategy that involves regulating membrane structure to create a loose and dense double-layer structure via bi-directional interfacial polymerization has been proposed to form selectivity-enhanced nanofiltration membranes for Li + /Mg 2+ separation. The incorporation of dopamine (DA) and trimesoyl chloride (TMC) in first loose layer could improve the membrane stability, while the amine groups from polyethyleneimine (PEI) or polyvinylamine (PVAm) in the second dense layer surface, provided by rich amine polymers, could improve the rejection of divalent magnesium ion. The as-fabricated membrane DA-TMC-PEI shows enhanced permeance (around 15.4 L m −2 h −1 bar −1 ) and the membrane DA-TMC-PVAm demonstrates outstanding ion selectivity with Li + /Mg 2+ separation factor of 30. Moreover, the DA-TMC-PEI and DA-TMC-PVAm membranes could efficiently purify the ratio of Mg 2+ /Li + solution from 50 to 0.43. We believe the strategy could provide a promising potential in lithium extraction.
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