Zhenfeng Bian

Shanghai Normal University

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Hexing Li

Shanghai Normal University

Jian Zhu

Dalian Institute of Chemical Physics

Yao Chen

Nanjing Tech University

Zhenmin Xu

Shanghai Institute of Technology

Xufang Qian

Shanghai Jiao Tong University

Yuqing Ren

State Key Laboratory of Pollution Control and Resource Reuse

Yawei Feng

Hunan University

Fenglei Cao

Hebei University of Science and Technology

Jiazhen Cao

Shanghai Normal University

Tetsuro Majima

Osaka University

Cooperative Institutions

Shanghai Normal University

101

Chinese Academy of Sciences

University of Chinese Academy of Sciences

Central South University

Beijing Institute of Nanoenergy and Nanosystems

Shanghai Jiao Tong University

Fudan University

East China University of Science and Technology

Sichuan University

Zhejiang University

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Unveiling the Role of Defects on Oxygen Activation and Photodegradation of Organic Pollutants

Environmental Science & Technology (2018)

Mengjiao Xu Yao Chen Jiangtao Qin Yawei Feng Wei Li

The status of defects of TiO2 are of fundamental importance in determining its physicochemical properties. Here we report a simple chemical deposition method for controllable synthesis of defective anatase TiO2 nanocrystals under various calcination atmospheres. XPS and ESR analysis reveals that both the oxygen vacancies (VO) and the trivalent titanium (Ti3+) defects exist in TiO2 after N2 treatment (N-TiO2). Meanwhile, mainly VO defects can be obtained in TiO2 with air calcination (A-TiO2). ESR spectra for reactive oxygen species determination, clearly show that the visible light catalytic activity is mainly caused by the efficient activation of oxygen molecules to •O2– species for A-TiO2, which play an important role in hindering the accumulation of intermediates during p-chlorophenol (4-CP) photodegradation process. However, the oxygen molecules cannot be activated for N-TiO2 even with superior visible light absorption and thus the photogenerated electron are reductant, which participated in the transformation of BQ to HQ via electron shuttle mechanism. Moreover, A-TiO2 exhibits higher separation efficiency of photogenerated carriers than that of N-TiO2, showing the critical role of VO with a suitable concentration in transferring photogenerated charges.

Photodegradation

Rutile

10.1021/acs.est.8b03558

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Citations (186)

Aerosol spray assisted assembly of TiO2 mesocrystals into hierarchical hollow microspheres with enhanced photocatalytic performance

Applied Catalysis B Environment and Energy (2016)

Chao Tang Longfei Liu Yali Li Zhenfeng Bian

10.1016/j.apcatb.2016.08.006

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Citations (112)

The 12th International Conference on Environmental Catalysis (ICEC2022), Osaka (Japan), July 30th – August 2nd, 2022

Applied Catalysis B Environment and Energy (2023)

Hiromi Yamashita Zhenfeng Bian Atsushi Urakawa Michael Stockenhuber

10.1016/j.apcatb.2023.123095

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A curtain purification system based on a rabbit fur-based rotating triboelectric nanogenerator for efficient photocatalytic degradation of volatile organic compounds

Nanoscale (2023)

Dehong Yang Zhaoqi Liu Peng Yang Ling Huang Fengjiao Huang

Efficient removal of air pollution caused by volatile organic compounds (VOCs) and particulate matter (PM) through distributed energy collected from the environment is an effective strategy to achieve both energy conservation and better air quality. Herein, a curtain purification system based on a rabbit fur-based rotary triboelectric nanogenerator (RR-TENG) and a collaborative photocatalysis technology was designed for indoor air purification. The high electrostatic field from RR-TENG enhances formaldehyde adsorption, while it can also efficiently adsorb PM2.5 simultaneously. More interestingly, the ultrahigh electric field provided by RR-TENG promotes the separation of photogenerated electron-hole pairs of the g-C3N4/TiO2 composite photocatalyst, generating more superoxide radicals (⋅O2-), hydroxyl radicals (⋅OH), and holes (h+) and thereby improving the photocatalytic efficiency. In a simulated reaction chamber of 9 L, the formaldehyde removal rate of the system can reach 79.2% within 90 min and RR-TENG rapidly reduces PM2.5 from 999 μg m-3 to 50 μg m-3 within 60 s. This study proposes a curtain purification system integrating the function of energy collection and photocatalytic purification, which can be applied for improving air quality and human health.

Air purification

Degradation

Nanogenerator

Portable water purification

10.1039/d3nr00507k

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Citations (16)

Tailoring the Asymmetric Structure of NH₂‐UiO‐66 Metal‐Organic Frameworks for Light‐promoted Selective and Efficient Gold Extraction and Separation

Angewandte Chemie International Edition (2023)

Jiazhen Cao Zhenmin Xu Yao Chen Shuangjun Li Yue Jiang

Designing adsorption materials with high adsorption capacities and selectivities is highly desirable for precious metal recovery. Desorption performance is also particularly crucial for subsequent precious metal recovery and adsorbent regeneration. Herein, a metal-organic framework (MOF) material (NH2 -UiO-66) with an asymmetric electronic structure of the central zirconium oxygen cluster has an exceptional gold extraction capacity of 2.04 g g-1 under light irradiation. The selectivity of NH2 -UiO-66 for gold ions is up to 98.8 % in the presence of interfering ions. Interestingly, the gold ions adsorbed on the surface of NH2 -UiO-66 spontaneously reduce in situ, undergo nucleation and growth and finally achieve the phase separation of high-purity gold particles from NH2 -UiO-66. The desorption and separation efficiency of gold particles from the adsorbent surface reaches 89 %. Theoretical calculations indicate that -NH2 functions as a dual donor of electrons and protons, and the asymmetric structure of NH2 -UiO-66 leads to energetically advantageous multinuclear gold capture and desorption. This adsorption material can greatly facilitate the recovery of gold from wastewater and can easily realize the recycling of the adsorbent.

Selective adsorption

10.1002/anie.202302202

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Citations (52)

Boosting Fe3+/Fe2+ cycling under visible-light-driven TiO2-based membrane with electron-deficient center for wastewater decontamination

Applied Catalysis B Environment and Energy (2025)

Qingfei Zhao Zhenpeng Guo Zhonghua Wu Shuyuan Dong Ronghao Kang

Human decontamination

Boosting

Cycling

Center (category theory)

10.1016/j.apcatb.2025.125070

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Single‐Crystal‐like Titania Mesocages

Angewandte Chemie International Edition (2010)

Zhenfeng Bian Jian Zhu Jing Wen Fenglei Cao Yuning Huo

Zeolite's mesoporous cousins: High-surface-area single-crystal-like anatase-TiO2 was synthesized by a simple solution-growth method. This method produces a controllable mesoporous network and preferential exposure of the highly active (001) planes (see TEM) and is readily extendable to the synthesis of other mesoporous single crystals for application in, for example, catalysis and energy storage. Detailed facts of importance to specialist readers are published as "Supporting Information". Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.

Crystal (programming language)

10.1002/anie.201004972

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Citations (104)

Solvothermal synthesis of highly active Bi2WO6 visible photocatalyst

Research on Chemical Intermediates (2009)

Jian Zhu Jinguo Wang Zhenfeng Bian Fenglei Cao Hexing Li

Rhodamine B

Visible spectrum

Solvothermal synthesis

Powder Diffraction

10.1007/s11164-009-0099-4

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Citations (26)

Photocatalytic Methane Conversion

Acta Physico-Chimica Sinica (2020)

henmin Xu Zhenfeng Bian

Abstract:

10.3866/pku.whxb201907013

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Citations (12)

Ordered mesoporous TiO₂with exposed (001) facets and enhanced activity in photocatalytic selective oxidation of alcohols

Journal of Materials Chemistry A (2012)

Jinguo Wang Zhenfeng Bian Jian Zhu Hexing Li

Single-crystal TiO2 with 2D and 3D ordered mesoporous structures and exposed (001) facets were synthesized by SBA-15 or KIT-6 templated alcoholysis of TiOSO4 under solvothermal conditions. In the liquid phase photocatalytic selective oxidation of alcohols to aldehydes under UV-light irradiation, the single-crystal TiO2 exhibited much higher activity than the polycrystalline TiO2, since the high crystallization degree favored the transfer of photoelectrons, which might reduce their rate of recombination with holes. Meanwhile, the TiO2 with ordered mesopores showed higher activity than that with disordered mesopores, and the 3D ordered mesoporous channels were more favorable for photocatalytic oxidation than the 2D ordered mesoporous channels, which could be attributed to both the enhanced light harvesting resulting from the multiple light reflections in the pore channels, and the facilitated diffusion and adsorption of the reactant molecules. Also, the exposed (001) facets favored the photocatalytic oxidation due to its high surface energy and increased oxygen vacancies, which reduced the photocharge recombination rate by capturing photoelectrons.

Photoelectric effect

10.1039/c2ta00035k

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Citations (93)