Materials Today Sustainability
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2022
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IF 7.244
S. Wei,S. Fan,M. Zhang,J. Ren,B. Jia,Y. Wang,R. Wu,Z. Fang,Q. Liang
Different from traditional dye sensitization by chemisorption in the dark, this work uses electron trapping sites and positively charged rhodamine B dye molecules to achieve electrostatic interaction under irradiation. As the irradiation time increases, the surface oxygen vacancies of Bi 2 MoO 6 as the electron trapping sites gather a large number of electrons forming negative surface, which are tightly bound to the positive rhodamine B dye molecules. In the dye-sensitized Bi 2 MoO 6 system, the electrons located on the oxygen vacancies can reduce the oxidized dyes to ground state. The newly formed ground-state dyes are photoexcited again and inject electrons into the conduction band of the Bi 2 MoO 6 to participate in photodegradation levofloxacin. Then the newly aggregated electrons on the oxygen vacancies repeat the above cycle. The formation of the cyclic path greatly reduces the recombination of electrons and holes in Bi 2 MoO 6 , which increases the efficiency of photocatalytic degradation of levofloxacin from ∼43.5% to ∼98.3% under LED irradiation for 2 h. In addition, the photodegradation pathway of levofloxacin is investigated.
研究领域:
环境科学
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材料科学
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化学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Yanning Qu,Xinyang Li,Hengli Zhang,Renliang Huang,Wei Qi,Rongxin Su,Zhimin He
Multifunctional photocatalytic surfaces for pollutant degradation and antimicrobial application are often in high demand, however they confront many challenges in charge transfer and light capture ability. In this work, a sponge-like N,S-CQDs/Bi 2 MoO 6 @TiO 2 film was constructed via hydrothermal technique aiming to solve above problems. As a result, the ternary film showed enhanced photocatalytic efficiency under visible and near-infrared (NIR) light, in which 85.8% and 44.6% of ciprofloxacin (CIP) were degraded after 240 min irradiation with visible and NIR light, respectively. Moreover, the composite film effectively realized photocatalytic sterilization of gram-positive B. subtilis and gram-negative E. coli under visible light irradiation. The bacterial colony decreased significantly from 7.56-log to 1-log cfu/mL after adding the ternary film within 1.5 h. The enhanced photocatalytic efficiency was closely related to both introduction of surface-functional N,S-CQDs and the construction of N,S-CQDs/Bi 2 MoO 6 @TiO 2 Z-scheme system, in which the transfer efficiency of photoinduced carriers and the light absorption property were significantly improved. We consider that the N,S-CQDs/Bi 2 MoO 6 @TiO 2 film is promising for the degradation of refractory pollutants and antimicrobial application under visible/NIR light irradiation. The relatively convenient recycling property and excellent photocatalytic performance of the N,S-CQDs/Bi 2 MoO 6 @TiO 2 film are beneficial for industrial applications.
研究领域:
环境科学
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材料科学
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微生物学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Wenting Li,Zhuoran Yang,Chunyu Yang,Wei Guo
This study addresses the challenge of enhancing ferroptosis efficacy for tumor therapy, particularly the limited therapeutic efficiency of current inducers due to tumor microenvironment constraints. Herein, we developed a hollow ultrasound-triggered ZnFe 2 O 4 -Bi 2 MoO 6 (ZB) S-scheme heterojunction loaded with artesunate (ART) to overcome these limitations. The ZB heterojunction with a particle size of ∼250 nm efficiently separates electron-hole pairs under ultrasound (US), promoting the generation of reactive oxygen species (ROS). The photodynamic effect of ZB further boosts ROS production, while ART, controlled-released by phase change materials under laser/US stimulation, enhances ROS production via Fe 2+ -mediated decomposition. This triple-enhanced strategy accumulates lipid peroxidation (LPO), significantly improving ferroptosis effects with a tumor suppression rate of 94.3 %. Moreover, ZB enables multimodal imaging and stimulates antitumor immunity, demonstrating its potential as a diagnostic and therapeutic agent. Our findings demonstrate the potential of this ZB@ART system in advancing ferroptosis-based tumor therapies, inspiring future designs of efficient ferroptosis inducers.
研究领域:
癌症治疗
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纳米技术
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生物医学工程
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材料科学
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DOI
PubMed
高影响因子
DALTON TRANSACTIONS
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2022
·Vol. 51
·期 41
·15797-15805
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IF 4.569
Jiawei Wu,Bangfu Ding,Xin Qian,Liang Mao,Huibin Zheng,Lei Zhang,Shukai Zheng,Junying Zhang
The Bi2MoO6 nanosheets are loaded on to γ-Bi2O3 tetrahedron surfaces to form Bi2MoO6/γ-Bi2O3 heterojunctions using a simple calcination method. The photocatalytic degradation efficiencies of the lomefloxacin and the Rhodamine B using the optimum sample are 96% and 99%, respectively, much higher than that of pure phase samples. When the waters from different regions in China were used as solvents, the removal efficiencies of the lomefloxacin and the Rhodamine B are still higher than 88% and 90%, respectively, which shows excellent prospects for practical applications. The photocatalytic degradation efficiencies of these two pollutants are higher than 91% and 95% in the five cycling tests, and the crystal structure of the sample is not changed after cycling. Based on the first-principles calculation, Bi2MoO6 and γ-Bi2O3 form a Z-type energy band structure which accelerates the separation of the photogenerated charge carriers. The Bi2MoO6 valence band potential of 3.25 V and the γ-Bi2O3 conduction band potential of −0.21 V are reserved to generate ˙OH− and O2−, respectively, for the photocatalytic reaction. The degradation of the lomefloxacin is ascribed to the shedding of functional groups and bond breaking with the final products being CO2, F−, H2O, and NO3−. This research shows that Bi2MoO6/γ-Bi2O3 heterojunctions can be employed to purify domestic and textile industrial sewage.
研究领域:
环境科学
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材料科学
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化学
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水处理
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Shenghang Peng,Rong Li,Jing Li,Jian-Ping Zou,Alex Aziz,Xuxing Chen
Effective removal of ethylene (C 2 H 4 ) during fruit and vegetables storage and transport remains a critical challenge for post-harvest preservation. Although S-scheme heterojunctions can improve charge separation and redox capacity for ethylene degradation, their efficiency is still restricted by limited carrier transfer and sluggish oxygen activation. Here, we rationally designed a novel 2D/2D SnNb 2 O 6 /Bi 2 MoO 6 monolayer S-scheme heterojunction integrated with Pt co-catalyst to address these limitations. Density Functional Theory (DFT) calculations revealed the S-scheme charge transfer pathway, which was experimentally realized via electrostatic self-assembly followed by annealing-induced atomic interface bonding. Photodeposited Pt nanoparticles further promoted O 2 activation at reduction sites. The optimized Pt-50-SNOBMO achieved an outstanding visible-light-driven degradation rate (139.2 × 10 −3 min −1 ), 248.6 and 143.5 times higher than pristine SnNb 2 O 6 and Bi 2 MoO 6 , representing the best performance reported to date for ethylene removal. Extensive spectroscopic and microscopic analyses confirmed the robust interface interactions and S-scheme mechanism. This study provides new insights into heterojunction engineering and offers a promising strategy for advanced photocatalytic preservation technologies.
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
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采后保鲜技术
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2023
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IF 10.9
Hainan Wei,Fanming Meng,Han Zhang,Wenqing Yu,Jialong Li,Sheng Yao
Constructing new photocatalysts for the photocatalytic reduction of CO 2 and efficient degradation of Levofloxacin is of great importance to renewable energy. Here, S-scheme Bi 2 MoO 6- x /MoS 2 heterojunction nanospheres containing abundant surface defects (oxygen vacancies) were designed and successfully synthesized to enhance CO 2 photoreduction activity in the absence of other sacrificial agents, co-catalysts or photosensitisers. At the same time, it can efficiently degrade organic pollutants (Levofloxacin). This heterogeneous structure with surface defects provides an abundance of reactive sites, accelerates charge separation and improves oxidation capacity. The improved Bi 2 MoO 6- x /MoS 2 heterogeneous nanospheres show excellent performance under simulated solar light, with the selectivity and yield of 92.45% and 29.01 µmol h −1 , respectively, for the generation of CO. Under visible light, the degradation efficiency of levofloxacin hydrochloride (LVX) reached 96.3% within 25 min and remained as high as 95% after three cycles. This work provides a new idea for the design of new S-scheme photocatalysts and an important reference for the preparation of photocatalysts for the efficient photocatalytic reduction of CO 2 and the efficient degradation of organic pollutants at the same time.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
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IF 4.1
Shuting Jiang,Yifan Wang,Haoran Cheng,Gongliang Zhang,Hongman Hou,Jingran Bi,Shuang Yan,Hongshun Hao
A unique multifunctional photoelectrochemical(PEC) platform for the simultaneous detection and inactivation of Salmonella enteritidis (SE) was proposed. The photoactive material in the platform was a Bi 2 MoO 6 /V 2 CTx composite, and gold nanoparticles were modified to link the aptamer via Au-S bonds. The aptamer was to link the complementary DNA (cDNA) to the electrode surface via base complementarity. In the presence of SE, the aptamer attached to Salmonella enteritidis selectively and then the cDNA was released from the aptamer electrode, the photocurrent signal was amplified, allowing for quantitative detection of Salmonella enteritidis . The linear range of the method was 1.82 × 10 2 CFU/mL to 1.82 × 10 8 CFU/mL based on the specific recognition of Salmonella enteritidis by aptamer. The detection limit was 26 CFU/mL. Furthermore, due to its photoelectrocatalytic action, the PEC platform demonstrated strong antibacterial activity (99.99 %). The new technique was created to detect and inactivate Salmonella enteritidis in a timely and sensitive manner.
研究领域:
分析化学
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生物技术
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材料科学
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微生物学
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DOI
高影响因子
ACS Applied Nano Materials
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2018
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IF 0
Yan Chen,Weiyi Yang,Shuang Gao,Caixia Sun,Qi Li
Controlled introduction of oxygen vacancies in metal oxide based photocatalysts could improve their charge carrier separation efficiencies to enhance their photocatalytic performances. In this work, oxygen vacancies were introduced in Bi2MoO6 nanosheets through a postsynthesis etching treatment by NaOH aqueous solution at room temperature for the first time, which removed the requirement of high temperature treatment, chemicals of high cost and environmental hazardness, or specific apparatus for the introduction of oxygen vacancies in previous studies. Furthermore, the crystal structure, morphology, optical properties, and energy band structures of these Bi2MoO6 nanosheets were not changed by this approach, which allowed the separation and illustration of the charge carrier separation role of oxygen vacancies for the photocatalytic performance enhancement. With the increase of oxygen vacancies, Bi2MoO6 nanosheets demonstrated improved electron–hole separation efficiency and largely enhanced photocatalytic activities as demonstrated by their effective sulfamethoxazole degradation and Escherichia coli bacteria disinfection under visible light illumination with good stability and reusability.
研究领域:
材料科学
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纳米技术
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环境科学
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光化学
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产品关联
DOI
ChemSusChem
·
2021
·Vol. 14
·期 16
·3293-3302
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IF 8.928
Dawei Zhao,Yimin Xuan,Kai Zhang,Xianglei Liu
Graphical Photocatalytic CO 2 reduction : Benefiting from the synergistic effect of local high electron density at active sites and thermodynamic bicarbonate assistance, the hierarchical Bi@Bi 2 MoO 6 composite simultaneously shows good photocatalytic CO 2 reduction activity and high ethanol selectivity (92 %). Furthermore, bicarbonate ions play an important role in the formation of long-chain products due to the C−C coupling between derivative carbene intermediates and other carbon-containing intermediates. Photocatalytic CO 2 reduction is a sustainable and inexpensive method to solve the energy crisis and the greenhouse effect. However, the major stumbling blocks such as poor product selectivity, low yield of the multi-carbon products, and serious recombination of electron-hole pairs hinder practical application of photocatalysts. Herein, a high-performance Bi@Bi 2 MoO 6 photocatalyst, Bi nanoparticles grown on the surface of Bi 2 MoO 6 nanosheets with oxygen vacancies, was fabricated via a simple solvothermal approach. Benefiting from the abundant active sites and effective separation of photogenerated carriers of Bi 2 MoO 6 nanosheets, and the localized surface plasmon resonance effect of Bi nanoparticles, the Bi@Bi 2 MoO 6 sample exhibited great photocatalytic CO 2 reduction activity. Furthermore, adding NaHCO 3 into the system not only significantly increased the C 2 H 5 OH generation rate but also enhanced the product selectivity. In the photocatalytic measurement (0.17 mol L −1 CO 2 -saturated NaHCO 3 solution), the highest formation rates of CO, CH 3 OH, and C 2 H 5 OH were reached at 0.85, 0.59, and 17.93 μmol g −1 h −1 (≈92 % selectivity), respectively.
研究领域:
环境科学
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材料科学
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化学工程
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能源科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
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IF 10.53
Zhaomei Yang,Qingquan Lin,Guangyong Zeng,Simiao Zhao,Guilong Yan,Micah Belle Marie Yap Ang,Yu-Hsuan Chiao,Shengyan Pu
Membrane separation technology is an effective treatment for complex wastewater. However, severe membrane fouling restricts its practical application. Photocatalytic composite membranes with self-cleaning properties can efficaciously ease the membrane fouling. Herein, we constructed an advanced ternary heterojunction photocatalytic composite membrane by coupling MXene , Bi 2 MoO 6 and BiOBr nanomaterials . The prepared BiOBr/Bi 2 MoO 6 @MXene composite membrane had a high permeability (1296.91 L⋅m −2 ⋅h −1 ⋅bar −1 ) and exhibited excellent comprehensive removal ratios for antibiotics and dyes (Tetracycline hydrochloride and Ciprofloxacin: ≥90%, Congo red: >98%). During the self-cleaning performance test, the composite membrane maintained high permeability and selectivity after 5 cycles. Density functional theory calculation (DFT) analysis revealed that the enhanced photocatalytic activity was attributed to the efficient separation of electron-hole pairs between the ternary heterojunctions. This integrated membrane with both membrane separation and photocatalysis has good application prospects in the removal of various pollutants in the wastewater field.
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
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2025
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IF 9.8
ShaSha Wang,Lingjie Sheng,Yang Lu
In the present study, we developed a nanozyme-based direct competitive immunoassay to detect walnut allergen (Jug r 4) in foods. Walnut monoclonal antibody (mAb) and Cu 2− x Se@Bi 2 MoO 6 nanocomposites were generated to form a signal probe by electrostatic adsorption. The nanocomposites had high peroxidase-like activity and could be stored at room temperature. The linear range of the optimized assay was 137.35 ± 0.14 to 3526.0 ± 4.53 μg/L with a limit of detection of 81.63 ± 0.89 μg/L. This method was validated by detecting walnut protein in bread, biscuits, and milk samples, providing recovery rates of 70.63–127.04 %. The fast and sensitive assay was suitable for the rapid detection of walnut allergen in foods.
研究领域:
食品科学
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分析化学
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纳米技术
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免疫学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Gaojian Lv,Lifang Sun,Hui Gao,Chengcheng Ma,Wen Li,Shougang Chen
The construction of heterojunction has been considered as an effective strategy to achieve charge separation and improve photocatalytic activity. In this work, stable reduced Cu 2 O/Ag/Bi 2 MoO 6 (Cu 2 O/Ag/BMO) nanocomposites with high-efficiency antibacterial activities were synthesized via a simple wet chemical method. After illumination of 30 days, Cu 2 O/Ag/BMO still showed excellent antimicrobial capability against P. aeruginosa and S. aureus . The photoluminescence spectroscopy was used to analyze the electrons and holes recombination efficiency of samples, which suggested Cu 2 O/Ag/BMO could promote electron-hole separation and extend the lifetime of photogenerated carriers. The results of photocurrent responses test suggested that the photocurrent density of Cu 2 O/Ag/BMO was four times stronger than the Cu 2 O, which indicated the higher separation efficiency of electrons and holes pairs for the formed Cu 2 O/Ag/BMO. Besides, density functional theory proved that Ag nanoparticles could promote the electrons transfer from the Bi 2 MoO 6 layer to the Cu 2 O layer which facilitated the separation of photogenerated electron-hole pairs. Therefore, electrons and holes could better participate in the redox reactions and then generate more active substances (•OH and •O 2 – ), improving the antimicrobial ability. Therefore, the prepared Cu 2 O/Ag/BMO composites has a great application prospect in the antifouling field.
研究领域:
材料科学
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光催化
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纳米技术
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环境科学
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微生物学
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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）