APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Qianqian Huang,Yun Hu,Yun Pei,Jinhui Zhang,Mingli Fu
TiO 2 @NH 2 -MIL-125, composite photocatalysts with close interfacial contact between NH 2 -MIL-125 and TiO 2 , were successfully synthesized via an in-situ solvothermal method for formaldehyde (HCHO) removal under UV irradiation. Samples were characterized by using a variety of analytical techniques. The results showed that TiO 2 particles were highly dispersed on the surface of NH 2 -MIL-125, and there was a strong electronic interaction (Ti-N-C) between elements of the composite. TiO 2 @NH 2 -MIL-125 exhibited significantly enhanced photocatalytic performance for HCHO removal compared to pure TiO 2 and NH 2 -MIL-125 that was ascribed to the synergistic combination of high adsorption capacity of NH 2 -MIL-125, high dispersion of TiO 2 and efficient interfacial charge transfer between TiO 2 and NH 2 -MIL-125. Furthermore, the HCHO removal rate over the composite remained at 90% after 122 h of continuous photocatalytic reaction, indicating the high stability of the catalyst. This work provides new insights that will be helpful in the further development of photocatalysts for indoor air purification.
研究领域:
环境科学
·
材料科学
·
化学工程
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Mengjia Zhou,Ziyan Cui,Yun Liu,Dan Wang,Yanzhou Li,Junwei Zhao,Wenwu You
In this study, a highly sensitive photoelectrochemical (PEC) immunosensor for the detection of carcinoembryonic antigen (CEA) utilizing core-sheath-type TiO 2 @NH 2 -MIL-125(Ti) nanocone array heterostructures was developed. The immunosensor was constructed by depositing NH 2 -MIL-125(Ti) as a sheath onto FTO/TiO 2 nanocones through seed-assisted solvothermal synthesis. The TiO 2 @NH 2 -MIL-125(Ti) heterostructure showcased superior PEC detection capabilities for CEA, leveraging the quantum and tip effects of the TiO 2 nanocones along with the broad-spectrum absorption of NH 2 -MIL-125(Ti), which collectively enhanced light utilization and photoelectric conversion efficiency. The internal electric field at the NH 2 -MIL-125(Ti)/TiO 2 interface enabled efficient photogenerated electron transfer, eliminating the need for external bias and enhancing photocurrent. The antibody-functionalized surface effectively captured CEA, resulting in a clear decrease in photocurrent. Under optimized conditions, the immunosensor exhibited a linear response to CEA in the range of 0.1 pg/mL to 100 ng/mL with a remarkable detection limit of 0.54 fg/mL. The developed PEC immunosensor demonstrated high stability and excellent reproducibility, providing an innovative strategy for the development of sensitive photoactive heterojunction materials for biomarker immunosensing applications.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 23
·20356-20366
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IF 2.324
Du Yingying,Zhao Lei,Chen Hui,Huang Zhaohui,He Xuan,Fang Wei,Li Weixin,Zhang Fuqing,Wang Guanghui
Heterojunction is considered as very promising material for various applications in photocatalysis. Herein, an efficient heterojunction photocatalyst N/Zn–TiO 2 @NH 2 -MIL-125 was successfully synthesized for photo-degradation organic oxidation by biological-templated method. The electron–hole pairs can be separated in space more efficiently because of heterojunction structure. Systematical analyses of spectroscopy and microscopy measurements revealed that N/Zn–TiO 2 @NH 2 -MIL-125 heterojunction materials exhibited hierarchical porous structure with high surface area of 366.02 m 2 g −1 and outstanding optical properties. Photocatalytic activity was investigated by degradating of rhodamine B (1000 µM) under visible-light irradiation. The N/Zn–TiO 2 @NH 2 -MIL-125 showed enhanced photocatalytic activity for RhB degradation, which is respectively about 1.81 and 1.97 times higher than that of the pristine N/Zn–TiO 2 and NH 2 -MIL-125. Various advanced spectroscopic characterizations were applied including photoluminescence, Mott–Schottky curves and electrochemical impedance spectroscopy. A possible mechanism of enhanced photocatalytic oxidation activity for N/Zn–TiO 2 @NH 2 -MIL-125 composite under visible light irradiation was discussed.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Yi Wen,Chenguang Qian,Xiaohan Li,Ruizhe Sang,Fang Yuan,Chunquan Li,Zhiming Sun
The development of heterojunction photocatalysts is pivotal in enhancing charge transfer and inhibiting the recombination of photoexcited electron-hole pairs, which is an effective strategy to improve CO 2 conversion. In this study, we have been assembled the TiO 2 @NH 2 -MIL-125 S-scheme heterojunction on the surface of diatomite. Comprehensive characterization confirms the S-scheme charge transfer pathway, which not only promotes preferential accumulation of photogenerated charges at catalytically active sites but also enables rapid, low-resistance charge separation and migration. Meanwhile, the introduction of diatomite improves the dispersion of the active components and accelerates the separation of photogenerated carriers driven by the built-in electric field. Consequently, the TiO 2 @NH 2 -MIL-125/diatomite composite exhibits selective photocatalytic CO 2 to CO conversion without requiring sacrificial reagents. The composite achieves a CO evolution rate of 13.53 μmol g −1 h −1 , which is 2.20 times and 1.33 times higher than pure TiO 2 and the binary TiO 2 @NH 2 -MIL-125 composite, respectively. Furthermore, the composite maintains a stable CO production rate after three reaction cycles. This study presents an approach to designing mineral-supported S-scheme heterojunction photocatalysts for solar energy conversion applications.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2020
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IF 7.1
Yunlei Zhou,Yue Wang,Shurong Li,Xi Fang,Huanshun Yin,Po Wang,Shiyun Ai
Photoelectrochemical (PEC) immunosensor was designed to detect N 1 -methyladenosine (m 1 A), where BiVO 4 /g-C 3 N 4 heterojunction was employed as photoactive material, polyamidoamine (PAMAM) and 4-carboxyphenylboronic acid (CPBA) were used as m 1 A antibody immobilization matrix, and Ti-based metal-organic framework encapsulated heterostructure of TiO 2 @NH 2 -MIL-125(Ti) was adopted as signal amplification. Due to the interaction between TiO 2 and phosphate, TiO 2 @NH 2 -MIL-125(Ti) was captured after immunoreaction between m 1 A and its antibody, which can further improve the detection sensitivity with increased PEC response. Under optimal experimental conditions, this method presented wide dynamic range (0.05–35 nM) with the low determination limit (16.7 pM, S/N = 3). This detection strategy showed good detection reproducibility, stability and selectivity. This method was applied to assess the effect of antibiotics on m 1 A content in the leaves, stems and roots of rice seedlings.
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高影响因子
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