Energy Material Advances
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2022
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IF 0
Abraham Adenle,Ming Shi,Xiaoping Tao,Yue Zhao,Bin Zeng,Na Ta,Rengui Li
The development of photocatalysts with wide spectral absorption and high charge separation efficiency has always been a pursued objective for photocatalytic solar energy conversion. Herein, we reported a wide-range visible-light-active Bi4TaO8Cl (BTOC) single crystal nanoplate with dominating {110} and {001} facets for enhancing the intrinsic charge separation efficiency. Insitu selective photodeposition of metals and metal oxides provides evidences of photogenerated electrons and holes spatially separated on {110} and {001} coexposed facets of BTOC, respectively. The intrinsic charge separation efficiency was demonstrated to be closely dependent on the crystal facets, which can be modulated by tuning the coexposed crystal facet ratio. Further surface modification of BTOC with suitable dual cocatalyst Ag and RuOx enables remarkable improvement of charge separation efficiency and photocatalytic water oxidation performance. Investigation by comparison between well-defined BTOC nanoplate and BTOC nanoparticles confirmed the significance of coexposed crystal facets for efficient spatial charge separation and the blocking of reverse reaction from Fe2+ to Fe3+ ions during water oxidation reaction, indicating that rational modulation of exposed crystal facets is significant for controlling the intrinsic charge separation efficiency on Bi4TaO8Cl photocatalyst for efficient photocatalytic water splitting.
研究领域:
材料科学
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能源化学
✓ 已验证
DOI
APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
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IF 22.1
Shufang Chang,Li Shi,Jinxing Yu,Ran Wang,Xiaoxiang Xu,Gang Liu
We have identified a facet-assisted mechanism for photocarrier separation in flux-treated Bi 4 TaO 8 Cl crystals that expose mainly {001} and {110} facets. These two crystal facets have different energy states that provide an internal electric field to split photocarriers towards different crystal facets. We have further leveraged the phenomenon by facet-selective deposition of CoO x cocatalyst at {001} crystal facets where holes are accumulated to expedite interfacial charge transfer reactions. The coupling of these two facet-engineering techniques brings exquisite control over the flow of photocarriers which cascade continuously from bulk to the surface for catalytic reactions . Under optimal conditions, the CoO x -deposited Bi 4 TaO 8 Cl achieves an unprecedentedly high apparent quantum efficiency of 27% at 420 ± 20 nm for water oxidation into O 2 . Stable overall water splitting into H 2 and O 2 (molar ratio 2:1) under visible light irradiation has also been realized in a Z-scheme system employing the CoO x -deposited Bi 4 TaO 8 Cl as the O 2 -evolution moiety.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Kai Liang,Jiacheng Xi,Xinghui Hou,Huiyu Yuan,Junyan Cui
Bi 4 MO 8 X-based nanomaterials exhibit promising potential for bioanalytical applications owing to their wide visible light absorption and strong affinity for thiol ligands. However, their photoelectrochemical (PEC) sensing performance is hindered by the low charge separation efficiency. In this study, particulate Bi 4 TaO 8 Cl photoelectrodes were prepared via a drop-coating method, and their charge separation behavior was optimized through trisodium citrate (Na3CA)-assisted post-necking treatment. This treatment facilitated the substitution of Na + ions for Bi 3+ ions, which enhanced oxygen vacancy generation. Additionally, it improved inter-particle connectivity. Benefiting from these modifications, the newly fabricated Na-Bi 4 TaO 8 Cl photoelectrode demonstrated significantly enhanced charge separation and transfer efficiency. Subsequently, a visible-light-driven PEC sensor based on the Na-Bi 4 TaO 8 Cl electrode was developed for cysteine detection, leveraging the specificity of Bi-S bond. Under visible-light irradiation, the PEC sensor exhibited superior PEC detection performance for cysteine, achieving a sensitivity of 360.00nA·cm −2 ·mM −1 and a linear detection range of 0–3.00 mM. The sensor also demonstrates good selectivity and stability. Moreover, it showed satisfactory recoveries in the detection of cysteine in real samples such as egg white. All these prove the practicability of the PEC sensor. This work provides a novel strategy for designing advanced nanomaterials for biological sensing applications.
研究领域:
材料科学
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生物传感器
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分析化学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Jia Ding,Lanlan Gao,Lulu Cao,Yunlei Zhou,Hao Wang,Jingrui Duan,Huanshun Yin,Jianchao Sun,Shiyun Ai
DNA hydroxymethylation is an important epigenetic modification, which plays crucial roles in many biological processes, such as gene expression and cell differentiation. Herein, a novel photoelectrochemical immunosensor was built for detecting 5-hydroxymethylcytosine (5hmC), where the perovskite Bi 4 TaO 8 Cl sensitized by 3,4,9,10-perylenetetracarboxylicacid (PTCA) was implemented as photoactive material, anti-5hmC antibody was served as target recognition reagent, ZrO 2 was used for connecting more modifications, and ferrocene was adopted as signal amplification unit. The prepared nanomaterials of Bi 4 TaO 8 Cl, PTCA and ZrO 2 were well characterized. The possible mechanism for the improved PEC response of Bi 4 TaO 8 Cl sensitized by PTCA was investigated carefully, indicated that the matched energy band facilitated the migration of photogenerated electron. In addition, the possible mechanism for signal amplification caused by ferrocene was investigated, showing that ferrocene acted as electron donor to accelerate electron transfer. Under the optimal condition, the biosensor manifested wide detection range from 0.02 to 100 nM with the low detection limit of 5.2 pM (S/N = 3). Moreover, the applicability of the biosensor was demonstrated by investigating the effect of heavy metal Cd 2+ and perfluorooctanoic acid on 5hmC content in the leaves and roots of wheat seedlings, as well as the effect of ALV-J on 5hmC content in chicken serum.
研究领域:
生物化学
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分析化学
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材料科学
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环境科学
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分子生物学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Ziwei Guo,Gui Yang,Yang Wu,Juan Long,Huan He,Xiaomin Ren,Bin Huang,Xuejun Pan,Yujun Liang
Defect engineering offers a feasible avenue to ameliorate the photocatalytic activities of semiconductors, but the traditional preparation processes for introducing the defects would destroy the pristine morphology of the materials. Herein, a controllable defect engineering on CeO 2 nanodots loaded Bi 4 TaO 8 Cl perovskite nanosheets was approached to synthesize well-defined CeO 2 /Bi 4 TaO 8 Cl (CE-BTC) heterojunction with stable oxygen vacancies (OVs) via a molten-salt-mediated strategy. Due to the coexistence of OVs and Ce 4+ /Ce 3+ redox couple, the photo-Fenton degradation rate of ofloxacin by optimal CE-BTC heterojunction (0.09610 min −1 ) was 7.78 and 4.98 times higher than that by individual Bi 4 TaO 8 Cl and CeO 2 , respectively. Moreover, the CE-BTC also exhibited excellent degradation performance towards other antibiotics including norfloxacin, ciprofloxacin, tetracycline, and sulfamethoxazole, while maintaining good recyclability and stability. The high efficiency of CE-BTC was also attributed to its enhanced light-harvesting capability, low photogenerated carrier recombination, and minimal electron transfer resistance. Mechanism study indicated that ⋅OH and ⋅O 2 – were the dominant reactive species, whereas h + also participated in the removal of ofloxacin with a lower contribution. This study demonstrated the enormous potential of CE-BTC heterojunction in the degradation and risk control of antibiotics, providing a promising strategy for designing highly dispersed heterojunction catalysts with surface defects.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yuerui Ma,Peng Chen,Jiazhen Liao,Xing’an Dong,Wenjie He,Wendong Zhang
Selective photocatalytic oxidation of NO to nitrate (NO 3 – ) over toxic NO 2 remains challenging due to low selectivity and inefficient charge migration in existing systems. This study introduces Fe 3+ as an electron acceptor beneath a Bi 4 TaO 8 Cl/Bi 2 O 2 CO 3 heterojunction to precisely regulate electron pathways and promote targeted hydroxyl radical ( • OH) generation. Combined experimental and DFT analyses reveal Fe 3+ ’s dual role: enhancing interfacial electron transfer and activating H 2 O at surface sites to form • OH. The optimized heterojunction achieves 68.19 % NO conversion with minimal NO 2 selectivity (10.98 %). ESR and ROS quenching confirm Fe 3+ -driven electron migration enriches surface holes, boosting H 2 O adsorption and • OH production (2.76-fold increase). The strong oxidation capacity of • OH suppresses NO 2 formation, favoring complete NO oxidation to NO 3 – . This work provides a strategic approach for selective NO removal by electron-pathway engineering, advancing the design of eco-friendly photocatalysts for air pollution control.
研究领域:
环境化学
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光催化
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材料科学
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化学工程
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大气污染控制
✓ 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）