JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Ziyu Yao,Luyang Zuo,Huan Yang,Bin Qin,Xiaolong Li,Jinzeng Wang,Fang Wang
A ternary composite of Ti 3 C 2 quantum dots, hydroxypropyl methylcellulose, and Bi 2 WO 6 effectively harnesses both optical and mechanical energy to achieve a strong piezo-phototronic effect for the removal of tetracycline hydrochloride. Under external mechanical stress, this system maintains a tightly integrated heterostructure, dynamically facilitating charge transfer across the nanosheets. Notably, the catalytic activity of the Ti 3 C 2 quantum dots/hydroxypropyl methylcellulose/Bi 2 WO 6 composite has been significantly enhanced, exhibiting a kinetic rate constant of 0.146 min −1 , which is 9.7 and 7.3 times higher than that of Bi 2 WO 6 under pure photocatalytic and piezocatalytic conditions, respectively. The enhanced piezo-photocatalytic performance can be attributed to several synergistic factors: (i) Charge carriers move in the direction of external forces while holes move in the opposite direction, reducing the recombination efficiency of photoexcited electrons and holes; (ii) The good dispersibility and abundant hydroxyl groups of hydroxypropyl methylcellulose enable the even distribution of Ti 3 C 2 quantum dots. Moreover, they form strong hydrogen bonds between Ti 3 C 2 quantum dots and Bi 2 WO 6 , significantly promoting charge transfer and system stability; (iii) Ti 3 C 2 quantum dots serve as electrons accepter of photogenerated carriers on the surface of Bi 2 WO 6 nanoplates, accelerating the separation and migration of photoelectrons. This work demonstrates the successful construction of a stable organic–inorganic ternary catalytic system and elucidates its underlying mechanism, offering a promising strategy to boost the piezo-phototronic effect in advanced wastewater treatment applications.
研究领域:
环境科学
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材料科学
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催化化学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Chao Zhang,Kaidi Wu,Hanlin Liao,Marc Debliquy
Pristine Bi 2 WO 6 nanosheets and hierarchical WO 3 -Bi 2 WO 6 microflowers were prepared via a facile hydrothermal technique. WO 3 -Bi 2 WO 6 microflowers were assembled with thin nanosheets, where WO 3 nanoparticles were uniformly loaded. The H 2 S sensing properties of pristine Bi 2 WO 6 nanosheets and hierarchical WO 3 -Bi 2 WO 6 microflowers were systematically investigated at room temperature. 20 WO 3 -Bi 2 WO 6 microflowers sensor displayed the best sensing property towards ppb-level H 2 S compared with all other samples. The enhancement was ascribed to the catalytic effect of WO 3 nanoparticles and the modified microstructure with large specific surface areas. Moreover, the n–n heterojunction structures also increase the thickness of electron depletion layer and potential barrier height, which could efficiently improve the sensing properties. The practical application of 20 WO 3 -Bi 2 WO 6 microflowers sensor in detecting the volatiles of Pangasius was also studied in this work. Therefore, the hierarchical WO 3 -Bi 2 WO 6 microflower is a promising ppb-level H 2 S sensing material for environment monitoring and fish freshness detection.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Weihong Gao,Geng Li,Qiuwen Wang,Lijun Zhang,Kang Wang,Shaoxuan Pang,Guangming Zhang,Longyi Lv,Xiaoyang Liu,Wenfang Gao,Li Sun,Yuguo Xia,Zhijun Ren,Pengfei Wang
Exploring advanced photocatalysts for antibiotics degradation is highly desired but remains a challenge due to the lack of reasonable structural design and molecular oxygen activation. Herein, we deliberately design novel ultrathin porous Bi 2 WO 6 with rich surface oxygen vacancies (V O -rich BWO) to enhance the tetracycline adsorption and photocatalytic reactive oxygen species generation. The oxygen vacancies in V O -rich BWO can narrow its bandgap to enhance the light absorption and introduce defect level, which can promote electron separation and transfer. Furthermore, the multiplication of oxygen vacancies increases the adsorption energy of O 2 , thus enhancing the chemisorption of O 2 , thereby activating O 2 to produce more •O 2 − . Meanwhile, the porous structure enhances the adsorption capacity of V O -rich BWO to tetracycline molecules, allowing for a more efficient use of the •O 2 − . Taking advantage of the synergy, the rich oxygen vacancies Bi 2 WO 6 nanosheets are able to degrade adsorbed tetracycline in situ with a degradation efficiency approximately 52.6 times that of bulk BWO, thus holding great potential for removing organic pollutants.
研究领域:
环境催化
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材料科学
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光化学
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环境污染治理
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纳米材料
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DOI
高影响因子
Environmental Science-Nano
·
2021
·Vol. 8
·期 5
·1376-1388
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IF 8.131
Zihan Kang,Enzhu Lin,Ni Qin,Jiang Wu,Baowei Yuan,Dinghua Bao
Piezocatalysis has emerged as a novel technique to make use of mechanical energy in dealing with organic pollutants in wastewater. In this work, ferroelectric Bi2WO6 (BWO) nanosheets with a characteristic layered crystal structure and in-plane polarization were investigated, with special interest in the influence of their crystal symmetry and oxygen vacancies on the piezocatalytic performance. The nanosheets were synthesized by a hydrothermal process along with thermal annealing at different temperatures and atmospheres. The crystal symmetry, grain size and oxygen vacancies of the crystals were characterized by XRD, SEM, XPS and Raman spectroscopy. The piezocatalytic properties were investigated by degrading Rhodamine B (RhB) solution under ultrasonic vibration. The free radicals generated by ultrasonic treatment were detected and characterized using the electron spin resonance (ESR) method. The essential role of hydroxyl radicals in the dye degradation process was demonstrated by controlled experiments with different scavenger additives. The results show that the crystalline size and oxygen vacancies affect the degree of orthorhombic distortion and formation of defect energy levels, respectively, which will further affect the distribution of piezoelectric potential and piezocatalytic activity. This work will enable us to understand the influence of oxygen vacancies and crystal symmetry on piezocatalysis more intuitively and design more efficient piezocatalysts via a heat treatment control strategy.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2022
·Vol. 57
·期 6
·4265-4282
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IF 4.682
Hu Wenna,Wu Fan,Liu Wei
The objective of this study was to construct the S-scheme Bi 2 WO 6 / α- Bi 2 O 3 heterojunctions with high enhanced visible-light photocatalytic performance. The composites loaded various Bi 2 WO 6 mass ratios were prepared by a ball grinding method. The characterization and reaction mechanism of photocatalysts were explored in detail. Remarkably, the results demonstrated that the Bi 2 WO 6 / α- Bi 2 O 3 presented an outstandingly superior performance for photodegradation of nitrobenzene. Among them, the 10%Bi 2 WO 6 / α- Bi 2 O 3 possessed the best photocatalytic property, and it could reach up to 95.7% in 50 min with the top rate constant of 0.06178 min −1 , which was 4.3 and 3.6 times that of bare Bi 2 O 3 and Bi 2 WO 6 , respectively. Simultaneously, the Bi 2 WO 6 / α- Bi 2 O 3 was well stable after five cycling experiments. The efficiently improved photocatalytic performance was primarily attributed to the formation of S-scheme structure between Bi 2 WO 6 and α- Bi 2 O 3 , which enhanced the conspicuous separating efficiency of photogenerated carriers. The present study not only offers a method to solve the unsatisfactory activity of Bi 2 O 3 , but also provides some insights into the design of other novel S-scheme composites with great potential application in clean energy and environmental remediation. Graphical abstract The efficiently improved photocatalytic performance was primarily attributed to the formation of S-scheme structure between Bi 2 WO 6 and α- Bi 2 O 3 , which enhanced the conspicuous separating efficiency of photogenerated carriers.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Chunyan Zhang,Xiaohong Chen,Yanmi Liu,Yi Zhao,Han Zhang,Daomei Chen,Shirong Zong,Jiaqiang Wang
Most photocatalysts reported to date need sacrificial agents (ethanol or methanol) to quench h + and facilitate the reduction of O 2 to H 2 O 2 . This requirement increases the cost of H 2 O 2 production and hinders the advancement of photocatalytic technology. Exploring a novel photocatalyst without the sacrificial agents for photocatalytic production of H 2 O 2 remains a huge challenge. In this research, we designed Indium phosphide (InP) quantum dot (QDs)-decorated bismuth tungstate (Bi 2 WO 6 ) microspheres for the photocatalytic generation of H 2 O 2 without the use of any sacrificial agents. The photocatalytic efficiency of InP/Bi 2 WO 6 composites for H 2 O 2 production reached 17.45 mmol g −1 h −1 , which is 90.8 times and 53.6 times greater than pure InP and Bi 2 WO 6 , respectively. Furthermore, InP/Bi 2 WO 6 composites demonstrated high photocatalytic H 2 O 2 production efficiency when used in industrial wastewater and tap water. In addition, in-situ photocatalytic H 2 O 2 synthesis was applied to actual coking wastewater for lowering chemical oxygen demand (COD) levels, and the removal rate was more than 60%. Remarkably, the degradation efficiency of acid orange 7 using the 3InP/Bi 2 WO 6 sample reached 99.9%. To the best of our knowledge, no other research has reported the use of InP QDs for the photocatalytic in-situ synthesis of H 2 O 2 in real water. This study provides valuable insights for the development of InP-based photocatalysts.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Lizhe Ma,Jieli Duan,Bang Ji,Yunfeng Liu,Chengjie Li,Can Li,Wenfeng Zhao,Zhou Yang
Overuse of antibiotics threatens water security, and photocatalysis is a potential technology to alleviate this problem. In this study, the TiO 2 /Bi 2 WO 6 /rGO nanocomposite materials were prepared by a solvothermal process, and a series of characterizations were carefully examined. Then, the removal of norfloxacin from water under visible light irradiation was investigated to evaluate the photocatalytic activity of TiO 2 /Bi 2 WO 6 /rGO. The TiO 2 /Bi 2 WO 6 /rGO composite catalyst has higher photocatalytic activity than TiO 2 and TiO 2 /Bi 2 WO 6 under visible light, and the optimal addition content for rGO is 0.5%. After 60 min of visible light irradiation, the degradation rate of norfloxacin on TiO 2 /Bi 2 WO 6 /rGO-0.5% reached 87.79%. Furthermore, the UV–Vis of the complex suggests that the ligand-metal electron transfer mechanism enhances the catalytic activity of TiO 2 /Bi 2 WO 6 /rGO. Finally, the mechanism of photocatalytic degradation of norfloxacin by TiO 2 /Bi 2 WO 6 /rGO composite catalyst was proposed.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jian Yang,Lei Li,Fan Fu,Hao Xu,Kang Da,Shaobo Cao,Wenting Chen,Lei Yang,Ximei Fan
As a typical aromatic volatile organic compounds (VOCs), toluene is difficult to be decomposed by photocatalysts under visible-light driven. Herein, the Ag/AgCl/Bi 2 WO 6 heterojunction photocatalysts were synthesized by multi-step process involving chemical deposition of AgCl on the surface of Bi 2 WO 6 and subsequently photoreduction of Ag 0 nanoparticles by UV light. The as-synthesized photocatalysts were characterized by XRD , SEM, TEM, XPS , UV–vis, PL and ESR to investigate the microstructures and electronic structures. The corresponding degradation efficiencies of gaseous toluene were evaluated and the optimal Ag/AgCl/Bi 2 WO 6 exhibited almost 99.9% removal rate after 60 min illumination with visible light (>420 nm). The optical absorption properties and radical trapping experiments revealed the possible energy band structure of Ag/AgCl/Bi 2 WO 6 heterojunction. Finally, the possible enhancement mechanism was also proposed that the cooperation of surface plasmon resonance (SPR) effect, efficient separation of electron-hole pairs, extension of the carrier lifetime as well as the high redox potentials of Z -scheme heterojunction were the primary reasons. Therefore, construction of Z-scheme heterojunction of Ag/AgCl/Bi 2 WO 6 with higher redox ability is an effective way to degradation gaseous toluene under visible-light irradiation.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 3
·1757-1768
·
IF 3.119
Yiqiu Liu,Yi Zhou,Qijun Tang,Qian Li,Si Chen,Zhuxing Sun,Haiqiang Wang
To explore an efficient photocatalyst for NO pollution, a direct Z-scheme photocatalytic system is successfully fabricated by coupling Bi2WO6 with NH2-UiO-66 via a simple hydrothermal synthesis technique. The Z-scheme system promotes the NO photocatalytic oxidation activity with an optimum NO removal rate of 79%, which is 2.7 and 1.2 times that obtained by using only pristine Bi2WO6 and NH2-UiO-66, respectively. Simultaneously, superior selectivity for converting NO to NO3−/NO2− is observed. The enhanced photocatalytic performance of the Bi2WO6/NH2-UiO-66 hybrids is attributed to the following two aspects: (i) large specific area of NH2-UiO-66, which exposes more active sites and is beneficial to the adsorption and activation of NO; (ii) outstanding Z-scheme structure constructed between BiWO6 and NH2-UiO-66, which can improve the efficiency of the separation of electron–hole pairs and preserves the strong oxidation ability of hybrids. ESR analysis shows that ·O2− and ·OH contribute to NO removal. A possible photocatalytic mechanism of NO oxidation on the direct Z-scheme photocatalyst (BWO/2NU) under visible light irradiation is proposed. This work displays the BWO/2NU hybrid's potential for treating low-concentration air pollutants, and the proposed Z-scheme photocatalyst design and promotion mechanism may inspire more rational synthesis of highly efficient photocatalysts for NO removal.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2013
·
IF 4.814
Yan Yan,Yafan Wu,Yuting Yan,Weisheng Guan,Weidong Shi
Recently, the controlled synthesis of semiconductor photocatalysts has attracted intense attention. In this report, we first report the controlled synthesis of Bi2WO6 nanostructures via the soluble inorganic salt Na2SO4-assisted hydrothermal method by simply adjusting the reaction time and pH value. Four typical Bi2WO6 nanostructures were obtained, namely nestlike nanostructures assembled by nanoplates (NNS-ANPs), rodlike nanostructures assembled by nanoplates (RNS-ANPs), quantum dots-modified nanoplates (QDs-NPs), and smooth-surfaced nanoplates (SSNPs). Tentative formation mechanisms of the different morphologies based on our observations are discussed. Photocatalytic degradation results show that the degradation ratios (DRs) of three-dimensional structures are higher than those of two-dimensional structures, and surface QDs play key roles in enhancing the DR of QDs-NPs. Morphology-dependent photocatalytic activities of different Bi2WO6 nanostructures are possibly due to different charge-separation abilities, which has been demonstrated by photoluminescence analyses.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Shukang Jiang,Guangwei Zheng,Junhao Sun,Fengqing Zhang,Hongwen Yu
The surface plasmon resonance (SPR) of plasmonic metals is an effective strategy for enhancing photocatalytic efficiency. Herein, we successfully synthesized the SPR-promoted Bi/Bi 2 WO 6 heterojunction photocatalysts by in situ reduction of Bi 3 + in Bi 2 WO 6 nanosheets to plasmonic Bi via a facile solvothermal method. The size of Bi nanoparticles on the surface of Bi 2 WO 6 was adjusted by varying the solvothermal temperature. After 15 min of visible light irradiation, the Bi/Bi 2 WO 6 heterojunction with a suitable size of metal Bi obtained after solvothermal treatment at 160°C exhibited 100 % degradation of Rhodamine B (RhB), which was 2.3 times greater than that of the pure Bi 2 WO 6 . The excellent photodegradation performance of this sample can be attributed to the SPR effect of metal Bi, which enhances light absorption, generates active sites and species, and facilitates rapid carrier transfer. Additionally, the formation of the Bi/Bi 2 WO 6 Schottky heterojunction promotes carrier separation and minimizes the recombination of photogenerated electron-hole pairs. Furthermore, a potential mechanism for the photodegradation process of the synthesized photocatalyst has been proposed. This work not only offers new perspectives on in situ fine-tuning strategies for Bi-based photocatalysts but also demonstrates the potential of low-cost metallic Bi as a viable alternative to noble metals for enhancing photocatalytic performance.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Pingping Teng,Yinxiao Chen,Nan Lu,Chen Shi,Zhihai Liu,Zheng Zhu,Yang Zhang,Shuai Gao,Sivagunalan Sivanathan,Kang Li
This paper presents a novel flexible PAN/Bi 2 WO 6 /BiOI heterojunction nanofiber, fabricated through electrospinning, as an advanced photocatalyst for the degradation of pollutants. The PAN nanofibers serve a stable and reusable support for the Bi 2 WO 6 /BiOI heterojunctions, which were constructed using a combination of solvothermal and successive ionic layer adsorption and reaction (SILAR) methods. The separation efficiency of the photogenerated electron-hole pairs and photocatalytic degradation efficiency of Rhodamine B under visible light were significantly enhanced by the heterojunction structure. Comprehensive characterizations confirmed the successful formation of the heterostructure and its superior electron transfer capabilities. The study identified superoxide radicals (·O 2 - ) and photogenerated holes (h + ) as key contributors to the photocatalytic process. The optimized nanofiber exhibited a degradation rate constant of 6.529 × 10 -2 min −1 , significantly outperforming its individual components, and maintained high activity over multiple reuse cycles. This research provides a promising approach for designing high-efficiency, recyclable photocatalytic materials with potential applications in environmental remediation.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）