ACS Catalysis
·
2025
·
IF 13.1
Lecheng Liang,Hengyu Li,Peng Li,Jinhui Liang,Shao Ye,Binwen Zeng,Mingjia Lu,Yanhong Xie,Yucheng Wang,Taisuke Ozaki,Shengli Chen,Zhiming Cui
A long-standing puzzle for methanol electrooxidation is the fundamental understanding of the origin of electrocatalytic selectivity. Herein, we unequivocally demonstrate that the Bi-modified Pt/C follows a CO-free dominated pathway during alkaline methanol electrooxidation and unveil the formaldehyde (HCHO) intermediate as a critical factor influencing pathway selectivity. These findings are substantiated by kinetic isotope effects, formate Faradaic efficiency, in situ spectroscopy, ab initio molecular dynamics simulations, and density functional theory calculations. Bi modification significantly increases the HCHO dehydrogenation barrier, which facilitates its desorption and subsequent conversion to the H2COOH– anion at the alkaline interface, intrinsically avoiding CO formation. More specifically, the formation of ensemble sites featuring a V-shaped Bi–Pt–Bi configuration inhibits the cleavage of the C–H bond, and the weak OH binding energy at Bi adatoms effectively prevents blockage of oxygenated species, allowing such ensemble sites to fulfill their functional role. This work provides in-depth insights into the origins of pathway selectivity and benefits the theory-guided design of advanced CO-free electrocatalysts.
研究领域:
电化学
·
催化
·
材料科学
·
物理化学
·
计算化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2024
·
IF 4.4
Bin Guan,Junyan Chen,Zhongqi Zhuang,Lei Zhu,Zeren Ma,Xuehan Hu,Chenyu Zhu,Sikai Zhao,Kaiyou Shu,Hongtao Dang,Zhen Huang
As a significant technology of CO2 utilization, artificial CO2 photoreduction has received more and more attention. Herein, g-C3N4 catalysts modified with Bi and/or Cu for CO2 photothermal reduction were prepared by solvothermal synthesis and impregnation methods. Performance evaluation and physicochemical and photo- and thermochemical characterization indicated that Bi and Cu modification effectively enhanced the photo-absorption properties of g-C3N4 catalysts, improving charge transfer efficiency and catalytic performance. Compared with single-metal modification, Bi and Cu co-modification showed a narrower bandgap and more excellent light and CO2 absorption capacity, suggesting a certain synergistic effect of Bi and Cu co-modification. The alteration of the light absorption properties may be related to the surface plasmon effect of Bi and Cu, and the co-loading of Bi and Cu can exacerbate the effect, which can effectively enhance the photoresponsivity of the catalysts, leading to higher catalytic performance.
研究领域:
催化
·
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2016
·
IF 4.012
Yangyang Zhang,Yiping Guo,Bijun Fang,Yujie Chen,Huanan Duan,Hua Li,Hezhou Liu
BiO 2 CH 3 nanoplate, a new organometallic crystal, with octagonal morphology is successfully prepared using methanol solvothermal method and further employed as template to fabricate porous β-Bi 2 O 3 octagonal nanoplates with a thickness of less than 50 nm. Then a series of hierarchical octagonal haystack-like β-Bi 2 O 3 /Bi 2 S 3 hybrids with large heterointerface and small bandgaps (1.36–1.44 eV) are constructed. It is found that, different from many regular photocatalysts that suffer from shrink of photocatalytic efficiency, the photoactivities of all β-Bi 2 O 3 /Bi 2 S 3 heterostructures are continuously enhanced with growing test cycles, owing to the formation of Bi 2 O 3− x S x solid solution, in which the built-in electric filed induced by lattice distortion can brings about higher e − /h + separation efficiency. The gradually increasing photocatalytic activity can reach to an up limit in about 5 photocatalytic cycles and maintain at this level. β-Bi 2 O 3 /Bi 2 S 3 heterostructure loaded with 20 mol% of Bi 2 S 3 is demonstrated to be the best photocatalyst and capable of fully decomposing Rh B in 30 min. Our work provides deep insights into the nature of the inversed photocatalytic behavior and facilitates the advanced design of photocatalysts with unabated photoactivities.
研究领域:
材料科学
·
光催化
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Yuzhen Wang,Xuanyi Yuan,Yongge Cao,Chaoyang Ma
With the rapid development of science and technology, the high-security-level anti-counterfeiting technique is essential for ensuring property or information security. In this work, we prepared micron NaYTiO 4 : Bi/Er (NYT: Bi/Er) phosphors with integrating up-conversion (UC) photoluminescence, down-shifting (DS) emission, phosphorescence and photochromism (PC) performances for advanced multiple anti-counterfeiting application. Owing to the abundant energy levels of Er 3+ ions, the UC and DS luminescence behaviors are anticipated. Specifically, the yellow-green emission of Er 3+ ions can be observed upon 980 nm excitation, and the bright green emission is demonstrated under 281 or 254 nm excitation due to the energy transitions of Er 3+ ions and the energy transfer process from Bi 3+ to Er 3+ ions. Besides, the introduction of Bi 3+ ions generates defect levels in the matrix and thus leads to phosphorescence. Furthermore, the repeatable PC performance could be triggered by the 365 nm irradiation and vanished with 450 nm illumination or thermal stimulation. To verify the practical usability of NYT: Bi/Er phosphors on anti-counterfeiting applications, some experiments are designed and successfully executed. It is believed that the NYT: Bi/Er phosphors can be a promising candidate for high-security-level multiple anti-counterfeiting.
研究领域:
材料科学
·
光学材料
·
安全技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Shunhang Wei,Jian Gao,Pingru Wu,Bo Yao,Haitao Xu,Yongsheng Tan,Shiyan Liu,Rong Wu,Yawei Wang,Lei Wang,Zebo Fang,Qifeng Liang
Although TiO 2 is a wide band gap semiconductor , it demonstrates photodegradation activity under visible light irradiation after dye sensitization. Compared with esterification between the surface hydroxyl group of TiO 2 and the carboxylic group of dyes, electrostatic interaction between TiO 2 and dye shows better photosensitized performance. In this work, Bi/Al co-doping anatase titania (Ti 1-x Bi 2x/3 Al 2x/3 O 2 (0 ≤ x ≤ 0.3)) is designed to enhance the electrostatic interaction. The effect of Al ions is to enhance the solubility of Bi 3+ into titania nanocrystals . A new band gap is generated after high concentration of Bi element doping , which not only promotes the absorption of visible light, but also improves the utilization of photogenerated carriers. Based on the results of transmission electron microscopy , light absorption, photodegradation activity and density functional theory calculations, it is found that bismuth dopant is the electron capture site. It first accumulates electrons through photocatalytic degradation reaction to enhance electrostatic adsorption between the catalyst and the positively charged dye molecules, and finally realizes high-efficiency photosensitization degradation of Rhodamine B. In addition, the sensitized titania has excellent photodegradation recyclability.
研究领域:
材料科学
·
光化学
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 27
·10096-10103
·
IF 5.7
Shaohua Li,Yi Zhang,Zihan Song,Zida Zheng,Xiaowei Zhang,Xueyun Liu
Luminescent solar concentrators (LSCs) serving as potential energy-conversion units have received great attention in building-integrated photovoltaics (BIPVs). However, the main challenge for BIPV-used LSCs is to maintain a high transparency while improving its photo-electric performance. In this work, we fabricate a flexible LSC by incorporating Bi-doped Cs2Na0.6Ag0.4InCl6 double perovskite (DP) QDs into polydimethylsiloxane (PDMS). The as-synthesized QDs show a large Stokes shift and broadband orange emission originating from the recombination between the localized states of [BiCl6] and [AgCl6] octahedra. The resultant LSC based on the above QDs exhibits a high internal quantum efficiency of up to 34.42%, which is relatively higher than that of other reported QD-based LSCs. More attractively, the average visible transmittance of the LSC remains 91.55%. By attaching a Si PV cell along the edge of the LSC, the optimal power conversion efficiency (PCE) and optical efficiency (ηopt) of the LSCs of 2.56% and 2.57%, respectively, can be reached under the irradiation of a solar simulator. In addition, the LSC presents good photostability after 80 h of xenon lamp irradiation. Therefore, we anticipate that the lead-free DP QD-based LSCs may provide a promising direction for high-efficiency transparent LSCs.
研究领域:
材料科学
·
太阳能
·
纳米技术
·
光电技术
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Suo Wang,Changyu Li,Huanshun Yin,Bin Gao,Zhengkun Yu,Yunlei Zhou,Jun Wang,Hongxia Xu,Jichun Wu,Yuanyuan Sun
Currently, achieving dual applications of Bi 2 O 2 CO 3 -based photocatalysts in photocatalytic degradation and sterilization under visible-light conditions is challenging. In this study, a novel Ag/Bi/Bi 2 O 2 CO 3 visible-light photocatalyst with bimetallic doping and rich oxygen vacancies was successfully synthesized using a one-pot hydrothermal crystallization method. The existence of oxygen vacancies was verified by X-ray photoelectron spectroscopy (XPS) and Electron spin resonance (ESR) analysis. The experimental results showed that Ag/Bi/Bi 2 O 2 CO 3 killed ∼100% (log 7) of antibiotic-resistant Escherichia coli (AR- E. coli ) within 60 min and degraded 83.81% of tetracycline (TC) within 180 min under visible light irradiation. Moreover, Ag/Bi/Bi 2 O 2 CO 3 can still remove 61.07% of TC in water after 5 cycles, showing excellent photocatalytic cycle stability and reusability. The possible degradation pathway of TC was determined by liquid chromatography-mass spectrometry. It was found that the main active substances in the photocatalytic disinfection of AR- E. coli were 1 O 2 , h + , and ·OH, while 1 O 2 was the dominant active species in the photocatalytic degradation of TC. This study presents a promising Bi 2 O 2 CO 3 -based visible light photocatalyst for treating both antibiotics (TC) and antibiotic-resistant bacteria (AR- E. coli ) in water.
研究领域:
环境科学
·
材料科学
·
化学
·
水处理
·
光催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Meixin Li,Pengfei Yu,Shanshan Li,Mati Ullah Khan,Shun Wang,Jiaqi Tian,Shuang Liu,Ling Kong,Zhiwei Chen
Aflatoxin B 1 (AFB 1 ) and ochratoxin A (OTA) are highly toxic mycotoxins prevalent in food and feed, posing severe threats to human and animal health. This work presents an innovative photoelectrochemical aptamer sensor for the detection of AFB 1 and OTA, leveraging a ternary BiOBr/Bi/BiOI heterojunction and Ag 2 S quantum dot-mediated signal amplification. The BiOBr/Bi/BiOI composite was synthesized via a one-step hydrothermal reduction using l -ascorbic acid (AA), exhibiting a high specific surface area to enhance biorecognition efficiency. In situ-assembled Ag 2 S quantum dots amplified photocurrent responses, while a single aptamer probe enabled specific dual-target recognition. Under optimized conditions, the sensor achieved exceptional sensitivity: linear ranges of 0.001–100 ng·mL −1 for both mycotoxins, with detection limits of 4.34 fg·mL −1 (AFB 1 ) and 13.54 fg·mL −1 (OTA). Validation in complex food matrices confirmed high accuracy and robustness. This platform not only provides a reliable method for mycotoxin monitoring but also establishes a versatile design paradigm for multiplexed detection of food contaminants.
研究领域:
分析化学
·
食品科学
·
生物传感器
·
纳米技术
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yanyu Song,Xianbo Sun,Long D. Nghiem,Jun Duan,Wen Liu,Yongdi Liu,Zhengqing Cai
Building a heterojunction is a fascinating option to guarantee sufficient carrier separation and transfer efficiency, but the mechanism of charge migration at the heterojunction interface has not been thoroughly studied. Herein, MIL-53(Fe)/Bi 4 O 5 I 2 photocatalyst with a Z-scheme heterojunction structure is constructed, which achieves efficient photocatalytic decontamination under solar light. Driven by the newly-built internal electric field (IEF), the formation of Fe-O-Bi electron migration channel allows for rapid separation and transfer of charge carriers at the heterojunction interface, confirmed by the material characterization and density functional theory (DFT) calculation. The narrower band gap and improved visible light response also contribute to the enhanced photocatalytic activity of composite materials. With levofloxacin as the target pollutant, the optimal MIL-53(Fe)/Bi 4 O 5 I 2 achieves complete removal of pollutant within 150 min, the photocatalysis rate of which is ca. 4.4 and 26.0 times that of pure Bi 4 O 5 I 2 and MIL-53(Fe), respectively. Simultaneously, the optimal composite material exhibits satisfactory photodegradation of seven fluoroquinolones, and the photocatalysis rates are as follows: lomefloxacin > ciprofloxacin > enrofloxacin > norfloxacin > pefloxacin > levofloxacin > marbofloxacin. DFT calculations reveal a positive relationship between degradation rate and Fukui index (ƒ 0 ) of main carbon atoms in seven fluoroquinolones. This study sheds light on the existence of electron migration channels at Z-scheme heterojunction interface to ensure sufficient photoinduced carrier transfer, and reveals the influence of pollutant structure on photolysis rate.
研究领域:
材料科学
·
环境科学
·
化学
·
光化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Bo Fang,Jie Xie,Dazhao Yu,Xinyue Zhang,Chaojie Jing,Hui Guo,Yuzhu Li,Wenzuo Li,Jie Liu
The hydrophilic benzimidazole@ZIF-8@tannic acid (ZBT) nanoparticles and the pH-responsive modified epoxy (EP) coatings based on ZBT were prepared innovatively. The result exhibited that the ZBT had excellent compatibility with the EP coatings, and the addition of ZBT improved the protective properties of the EP coatings, which were attributed to the formation of the Zn(OH) 2 deposition film, the inhibitor adsorption film and the ferric tannate film on the steel substrate. Meanwhile, the original adhesion and wet adhesion strengths of the ZBT/EP coatings were both enhanced, which was mainly attributed to the enhanced interaction between the ZBT/EP coatings and the carbon steel, and the crosslinking density and the degree of curing of the coatings were also improved. After 173 days of immersion, the impedance value of the ZBT coatings remained at 7.89 × 10 7 Ω·cm 2 , while the EP coatings decreased to 3.94 × 10 3 Ω·cm 2 . The wet adhesion loss of EP and ZBT/EP coatings was 63.6 % and 27.1 %, respectively. In the end, the protective mechanism of the ZBT/EP coatings was first proposed.
研究领域:
材料科学
·
腐蚀防护
·
涂料技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yanfang Li,Kang Xu,Huilin Hu,Lixia Jia,Yizhong Zhang,Ciren Zhuoga,Pengli Yang,Xin Tan,Wanqian Guo,Weichang Hao,Tao Yu,Jinhua Ye
Constructing atomic-level cation vacancies is an effective strategy to modulate the electronic properties of host materials, thus promoting charge transfer and redox reaction kinetics. Herein, ultrathin Bi 24 O 31 Br 10 nanosheets with cationic vacancy was synthesized via an inventive precipitation strategy by adding appropriate arginine. The difunctional arginine can changes the pH of the synthetic system and selectively deprive Bi atoms on the surface to form Bi vacancies through strong affinity between functional groups and cations. The abundant Bi vacancy decrease the Gibbs free energy change and provide channels to promote bulk adsorption of Cr(VI), thus effectively reduces the carrier migration distance during in situ bulk photocatalytic reduction of Cr(VI) and induces the formation of new impurity states to improve the utilization of visible light. Bi vacancy mitigates strong excitonic effects confined by significantly reducing exciton binding energies, thus effectively promote the separation of photo-generated charges and suppress reorganization of photon-generated carrier. Benefiting from these merits, these exclusive V Bi -Bi 24 O 31 Br 10 ultra-thin nanosheets exhibit superior reduction performance for Cr(VI), and the removal rate was more than 90% at universal pH (2–10). This work provides a new idea for the construction of cation vacancies and a feasible method for the removal of Cr(VI) under alkaline conditions.
研究领域:
材料科学
·
环境科学
·
化学
·
纳米技术
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Xiangta Xie,Yuyan Feng,Dongbo Wang
A novel in-situ grown α-Bi 2 O 3 /Bi 2 O 2 CO 3 /g-C 3 N 4 heterojunction (BBCx) was successfully fabricated via a two-step in-situ growth by a simple solvothermal calcination method. In this process, g-C 3 N 4 served as the substrate for the growth of Bi 2 O 2 CO 3 nanoplates, while Bi 2 O 2 CO 3 acted as the substrate for the subsequent growth of α-Bi 2 O 3 nanoplates. By characterizing the nanocomposite using different techniques, it was confirmed that the components of this ternary material are tightly bonded through heterojunction formation. Photocatalytic tests demonstrated that the composite exhibited higher activity than pure α-Bi 2 O 3 , Bi 2 O 2 CO 3 and g-C 3 N 4 . Among the composite materials, BBC400—obtained by solvothermal treatment followed by calcination at 400 °C for 2 h—exhibited the highest degradation efficiency toward tetracycline hydrochloride (TC-HCl), with a removal rate of 70% of TC-HCl within 120 min and a rate constant of 0.0081 min −1 . This rate constant was approximately 16.2 times (0.0005 min −1 ), 1.92 times (0.0042 min −1 ) and 1.35 times (0.006 min −1 ) higher than those of pure Bi 2 O 2 CO 3 , g-C 3 N 4 and α-Bi 2 O 3 , respectively. This synthesis approach offers a new strategy for the in-situ construction of heterojunction nanocomposites.
研究领域:
材料科学
·
环境科学
·
纳米技术
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）