JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2021
·Vol. 96
·期 8
·2298-2309
·
IF 3.174
Shizi Luo,Xinyan Xiao,Yi Wang,Mingli Lu
BACKGROUND The commonly used RhB dye is a carcinogen that is widely found in environmental matrices and poses a threat to aquatic biota and human health. However, conventional wastewater treatment processes do not effectively remove low concentrations of these pollutants. Herein, the P-Bi 4 O 5 Br 2 /AgI (PBA) heterojunction was synthesized via a polyvinylpyrrolidone (PVP)-assisted solvothermal and precipitation method in this work. RESULTS The photocatalytic efficiency of the PBA heterojunction was evaluated by degrading rhodamine B (RhB) with the irradiation of simulated sunlight. P-Bi 4 O 5 Br 2 /AgI-50 (PBA-50, the mass fraction of AgI in the composite was 50%) composite could degrade 98% RhB under 90 min irradiation of 500 W Xenon lamp, and its pseudo first-order reaction rate constant was 0.04265 min −1 , which was 17.1, 2.16, and 2.94 times higher than that of Bi 4 O 5 Br 2 , P-Bi 4 O 5 Br 2 , and AgI, respectively. Besides, the effects of the dosage of photocatalyst and the anion on the photocatalytic degradation of RhB over PBA-50 were analyzed. CONCLUSION The enhanced photocatalytic activity of PBA was attributed to its better visible light capture ability, larger specific surface area, and faster photogenerated carrier separation efficiency, all of which were confirmed by scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET), UV-Vis diffues reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), and photoelectrochemical analysis. In addition, the free radical trapping experiments confirmed that ·O 2 − and h + were the main active species for degradation of RhB. Additionally, the smaller bandgap and the more negative conduction band position of Bi 4 O 5 Br 2 were reached after the introduction of PVP. Accordingly, a possible type-II heterojunction photocatalytic mechanism of P-Bi 4 O 5 Br 2 /AgI was proposed. © 2021 Society of Chemical Industry (SCI).
研究领域:
环境科学
·
材料科学
·
光催化技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
LuLu Cao,Xianqiang Gao,Yunlei Zhou,Shugang Zhang,Miao Zhang,Huanshun Yin
The advanced structural design of semiconductor photoactive materials is the core element to improve the performance of photoelectrochemical (PEC) biosensors. By constructing a BiOIO 3 @Bi 4 O 5 Br 2 Z-Scheme heterojunction with abundant oxygen vacancies to significantly improve the photoelectric conversion efficiency, a sensitively PEC biosensor for MBD2 detection was designed by combining DNA isothermal cycle double amplification technology. Specifically, the chitosan-modified BiOIO 3 @Bi 4 O 5 Br 2 was modified on the surface of ITO electrode. Methylene blue (MB)-DNA was immobilized on due to the covalent reaction of its carboxyl group with the amino group of chitosan, and the excess amino group was blocked with acetaldehyde. In the absence of MBD2, the cleavage activity of HpaII is inhibited due to the retention of cytosine methylation. which triggers ISDPR and large amounts of single-stranded DNA complementary to MB-DNA was produced. After MB-DNA hybridization, Exo III was triggered to assist the MB-DNA hydrolysis cycle, resulting in the drop of MB, causing a decrease in the photoelectric signal. Conversely, in the presence of MBD2, it removed cytosine methylation, triggering HpaII hydrolysis and inhibiting subsequent reactions, so that the MB connected to the electrode is retained and the photoelectric signal is enhanced. The sensor had a detection range from 0.07 to 500 ng/mL with a detection limit of 0.018 ng/mL (3σ). The study also explores the effects of environmental pollutants on MBD2 activity and validated with molecular docking models, offering insights into epigenetic regulation and environmental health assessments. This work underscores the potential of advanced photoactive materials and heterojunction designs in biosensor applications.
研究领域:
生物传感
·
材料科学
·
分子生物学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Mengwen Xu,Yanying Wang,Enna Ha,Huijuan Zhang,Chunya Li
A photocatalyst based on the integration of reduced graphene oxide (rGO) with Bi 4 O 5 Br 2 nanosheets was facilely prepared and was confirmed by transmission electron microscope , scanning electron microscope, X-ray diffraction and Raman spectroscopy . The integration of rGO can effectively improve the adsorption and the photocatalytic properties of Bi 4 O 5 Br 2 nanosheets towards the target antibiotics under visible light irradiation. rGO/Bi 4 O 5 Br 2 nanocomposite containing 1.0 wt% of rGO exhibits the optimal adsorption and photocatalytic activity towards ciprofloxacin (CIP), norfloxacin (NOR) and tetracycline (TC). The removal efficiencies of CIP, NOR and TC are 97.6%, 80.7% and 98.7%, which are higher than that obtained with Bi 4 O 5 Br 2 nanosheets. The capture experiments and ESR data show that ·O 2 − , OH· and h + are the main active species that participated in the photodegradation system. This work provides a simple strategy to integrate rGO with Bi x O y X z (X = Cl, Br, I) nanosheets to construct effective photocatalysts for the degradation of antibiotics.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2023
·
IF 4.3
Xuan Wang,Yumiao Zhang,Wei Miao,Xiaofei Zhang,Yajun shi,Zhishu Tang,Huanxian Shi
In this work, a cost-efficient activated carbon (Ac)/Bi 4 O 5 Br 2 photocatalyst was successfully prepared for organic pollutant degradation in wastewater under simulated sunlight irradiation. The crystal structure, surface composition, morphology and optical properties of the prepared composites were systematically characterized by XRD, FTIR, SEM, EDS, SEM, XPS and ESR. The photocatalytic activity of the prepared Ac/Bi 4 O 5 Br 2 composites was evaluated by the degradation of rhodamine B (RhB) and cefixime under visible light irradiation. Additionally, the Ac/Bi 4 O 5 Br 2 composites displayed stronger photocatalytic activity compared with pure Bi 4 O 5 Br 2 . Particularly, the 30% Ac/Bi 4 O 5 Br 2 composite displayed the strongest degradation rate of cefixime and RhB, which is about 2 and 4 times to Bi 4 O 5 Br 2 . Furthermore, the enhanced photocatalytic activity of Ac/Bi 4 O 5 Br 2 composites was attributed to its stronger adsorption property, improved separation rate of photogenerated charge carriers and light capture ability. The degradation intermediates and pathway of cefixime was analyzed with HPLC-MS. The main actives species in the Ac/Bi 4 O 5 Br 2 composites are h + , ·O 2 – , ·OH as analyzed with the multiple techniques. This work provided an alternative strategy to treat the organic contaminants in wastewater with Bi x O y Br z -based photocatalyst.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jing Li,Mingkun Wu,Rui Tu,Jiacheng Li,Keliang Wang,Ju Guo,Yi Xie
The limited narrow spectral absorption and rapid recombination of photogenerated carriers in photocatalytic materials result in inefficient molecular oxygen activation and insufficient generation of reactive oxygen species (ROS), severely restricting the degradation efficiency of organic pollutants. Herein, a composite catalyst with broad visible-light responsiveness was fabricated via a facile solvothermal and room-temperature stirring strategy, where sheet-like Bi 4 O 5 Br 2 was encapsulated with W 18 O 49 nanowires. The as-prepared catalyst exhibited high concentrations of h + and O 2 − active species, achieving a 92 % degradation rate of ciprofloxacin (20 mg/L) within 60 min, alongside exceptional environmental tolerance and stability. Experimental and computational investigations confirmed the S-scheme charge transfer mechanism, which enhances carrier separation while preserving electrons and holes with strong redox capabilities. The localized surface plasmon resonance (LSPR) effect of W 18 O 49 synergistically promoted hot electrons and photogenerated electrons to activate O 2 , generating abundant O 2 − . This work proposes a novel design paradigm for efficient and stable visible-light photocatalysts, advancing solutions to emerging antibiotic pollutants in aquatic systems.
研究领域:
环境科学
·
材料科学
·
光催化
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Shanshan Ding,Danjun Mao,Shaogui Yang,Fei Wang,Lingjun Meng,Mengshu Han,Huan He,Cheng Sun,Bin Xu
The novel boron nitride coupled Bi-rich Bi 4 O 5 Br 2 layered microspheres (h-BN/Bi 4 O 5 Br 2 -LMs) were successfully synthesized via a facile ionic liquid-in-water (IL/W) microemulsion-mediated route. The physical, chemical and optical properties of these heterojunction photocatalysts were thoroughly characterized with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectrometry (EDS), transmission electron microscopy (TEM) and UV–vis diffuse reflection spectroscopy (DRS). Their photocatalytic activities were primarily evaluated by degradation of 4- tert -butylphenol (PTBP), which found 1.0 wt% h-BN/Bi 4 O 5 Br 2 -LMs to be the best one. The photocurrent experiments showed that the photocurrent density of 1.0 wt% h-BN/Bi 4 O 5 Br 2 -LMs was four times higher than that of pure Bi 4 O 5 Br 2 -LMs due to enhanced charge transfer ability of the former. It revealed that the addition of h-BN was in favor of suppressing the photoinduced electron-hole pair recombination of Bi 4 O 5 Br 2 -LMs, so as to improve the photocatalytic activity of the composite. O 2 − and h + were proved to be the main reactive species in the photocatalytic process by scavenger experiments and electron paramagnetic resonance (EPR) spectra. In addition, the photocatalytic mechanism of h-BN/Bi 4 O 5 Br 2 -LMs was further elaborated in this work. The probable degradation products were identified by GC–MS. The proposed conjugated addition and oxidation reactions were described to be the main pathways by combining the frontier electron density calculation and GC–MS results.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
WATER RESEARCH
·
2025
·
IF 12.4
Lingyou Meng,Zhuo Li,Binhong Qu,Peng Li,Jianhui Sun,Yang Qu,Ziqing Zhang,Liqiang Jing
The ultrasensitive, visual and intelligent identification of persistent chlorophenols (CPs) in complex drinking and environmental water matrices is highly desirable. In this study, we have established an interesting colorimetric dye eosin Y (EY)-molecular imprinted Bi 4 O 5 Br 2 nanosheet photosensitization sensing system for CPs detection, in which the key is the rapid EY photosensitization decolorization to be efficiently inhibited in the presence of CPs. It displays an ultrasensitive detection of CPs, especially for the typical 2,4,6-trichlorophenol (TCP) across from 10 ng·L −1 to 1 mg·L −1 , achieving a limit of detection of 7 ng·L −1 with remarkable selectivity. By means of in-situ Fourier transform infrared spectroscopy, time-resolved laser flash photolysis spectroscopy, and theoretical calculations, the outstanding performance is attributed to (i) the efficient transfer of triplet excited state electrons from EY to the ultrathin Bi 4 O 5 Br 2 (∼4 nm) nanosheets through energy band alignment and (ii) enhanced TCP selective adsorption resulting from a planar adsorption configuration induced by multiple Bi–Cl interactions, along with specific molecular imprinting recognition sites. Additionally, a real-time intelligent sensing platform was further engineered by integrating automatic sampling, an optical fiber source and a smartphone with color recognition software, enabling convenient and visual detection of TCP in challenging water environments. The sensing system exhibited excellent performance in detecting TCP across various actual water matrices, achieving acceptable recovery rates ranging from 93.33% to 113.33% with the relative standard deviations between 0.80% and 11.31%. It also demonstrated significant advantages over the ultra-performance liquid chromatography-tandem mass spectrometry, particularly regarding speed, simplicity and sensitivity, thus indicating substantial potential for practical applications in water quality monitoring.
研究领域:
环境科学
·
分析化学
·
纳米技术
·
材料科学
·
传感器技术
·
水污染检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2024
·
IF 8.1
Wenqian Lian,Lei Wang,Lin Xu,Xiaofei Fu,Zuming He,Junwu Tao,Yongmei Xia,Huimin Li,Xinyue Xu
The ubiquitous contamination of surfactants in wastewater has raised global concerns. Photocatalysis is deemed as a promising yet challenging approach for the decomposition of surfactant residues. Herein, a novel Z-scheme heterojunction of Bi 4 O 5 Br 2 /Bi 2 S 3 with covalent S–O bonds was prepared via a facile one-pot hydrothermal and subsequent annealing process. The prepared optimal Bi 4 O 5 Br 2 /Bi 2 S 3 composite exhibited remarkable photo-degradation activity towards the sodium dodecylbenzene sulfonate (SDBS). The Z-scheme reaction mechanism was proposed and validated by meticulous analysis of quenching tests, ESR spectroscopy and DFT calculations. Furthermore, the presence of chemical S–O linkages between Bi 4 O 5 Br 2 and Bi 2 S 3 was identified via FT-IR and XPS analyses, which served as a distinct bridge to modify the Z-scheme route for carrier transport. The Z-scheme heterostructure, in conjunction with chemical S–O bonds, synergistically enhanced the separation rate of electron-hole pairs and thus greatly boosted the photocatalytic activity. Additionally, the possible degradation pathways of SDBS were proposed by using HR-MS technology. Moreover, real hotel laundry wastewater could be efficiently disposed by the photocatalysis of the Bi 4 O 5 Br 2 /Bi 2 S 3 with a decrease in the COD value from 428 to 74 mg/L, indicating that the fabricated Z-scheme heterojunction hold great promise for effectively removing refractory surfactant contaminants from aquatic environment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yu Yuan,Jingru Lai,Yongqi Guo,Xiaoli Shi,Xiaoyan Wang,Mingye Ding
Er 3+ -activated upconversion (UC) luminescent materials show revolutionary potential in advanced anti-counterfeiting and non-contact temperature sensing by virtue of their excellent multiphoton absorption ability and color-tunable emission characteristics. However, it is difficult for the traditional system to achieve orthogonal UC luminescence of Er 3+ activator with color-tunable outputs in a simple nanostructure, which thus limits its multifunctional applications. To address this challenge, we designed Er 3+ -doped Bi 4 O 5 Br 2 nanosheets with tunable UC colors through smart dynamic manipulation of Er 3+ photon transition processes. Upon various excitation modes (e. g. non-steady-state, dual-wavelength-excitation, thermal excitation), the electron population among the intermediate states of Er 3+ ions can be precisely regulated through multi-photon upconverting processes, resulting in orthogonal luminescence with dynamically adjustable colors. Benefiting from exceptional emission performance (thermal-sensitive upconversion luminescence from thermally coupled levels Er 3+ : 2 H 11/2 / 5 S 3/2 and color-tunable orthogonal upconversion emission from green-emitting level Er 3+ : 2 H 11/2 / 5 S 3/2 and red-emitting state Er 3+ : 4 F 9/2 ), the as-obtained sample exhibits great potential in non-contact temperature measurement and multi-mode anti-counterfeiting via a series of concept verification experiments. This work gives a conceptual model to achieve Er 3+ orthogonal upconversion with multi-color outputs by modulating the emission dynamic in simple structural host, which will encourage researchers to develop multifunctional upconversion materials for the applications of high-level anti-counterfeiting and optical thermometry.
研究领域:
材料科学
·
光学
·
纳米技术
·
应用物理学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2023
·
IF 6.9
Xiaoge Wu,Lei Yan,Rongrong Qin,Qikai Zhang,Wei Yang,Xiaozhi Wang,Yongcai Zhang,Min Luo,Jianhua Hou
Bi 2 O 2 CO 3 (BOC)/Bi 4 O 5 Br 2 (BOB)/reduced graphene oxide (rGO) Z-scheme heterojunction with promising photocatalytic properties was synthesized via a facile one-pot room-temperature method. Ultra-thin nanosheets of BOC and BOB were grown in situ on rGO. The formed 2D/2D direct Z-scheme heterojunction of BOC/BOB with oxygen vacancies (OVs) effectively leads to lower negative electron reduction potential of BOB as well as higher positive hole oxidation potential of BOC, showing improved reduction/oxidation ability. Particularly, rGO is an acceptor of the electrons from the conduction band of BOC. Its dual roles significantly improve the transfer performance of photo-induced charge carriers and accelerate their separation. With layered nanosheet structure, rich OVs, high specific surface area, and increased utilization efficiency of visible light, the multiple synergistic effects of BOC/BOB/rGO can achieve effective generation and separation of the electron-holes, thereby generating more •O 2 − and h + . The photocatalytic reduction efficiency of CO 2 to CO (12.91 µmol/(g·hr)) is three times higher than that of BOC (4.18 µmol/(g·hr)). Moreover, it also achieved almost 100% removal of Rhodamine B and cyanobacterial cells within 2 hours.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysis Science & Technology
·
2021
·Vol. 11
·期 8
·2864-2872
·
IF 6.119
Xiaoli Li,Yuan Tang,Yue Jiang,Manman Mu,Xiaohong Yin
A series of composites composed of Bi4O5Br2 and Fe-MIL were successfully fabricated for mimicking sunlight-driven photocatalytic reduction of CO2. Herein, Bi4O5Br2, as a modulator of solid acids, could turn NH2-MIL-101(Fe) into NH2-MIL-88B(Fe) completely at 0.07 wt% catalytic loading, where further addition could construct the corresponding composites of Bi4O5Br2 and NH2-MIL-88B(Fe). The highest activity in the photocatalytic reduction of CO2 was achieved at 7.96 μmol g−1 h−1 of CH4 at 3.28 wt% of Bi4O5Br2. Besides, this catalyst possessed high photostability during the recycling experiments and the mechanism of this process was thoroughly explored. This study provides a novel strategy employing solid acid modulators for regulating the structure and morphology of MOFs showing high activity and stability in the photocatalytic reduction of CO2 to CH4.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Huanxian Shi,Wei Wang,Lihua Zhang,Zhishu Tang,Jun Fan
Here, a novel Ag quantum dots (Ag QDs) with diameter 3.1–10 nm modified Bi 4 O 5 Br 2 composite system was firstly fabricated via the facile mechanical agitation method and the photocatalytic ability of Ag QDs/Bi 4 O 5 Br 2 was evaluated by disinfection towards Escherichia coli ( E.coli ) under visible light stimulation (λ > 420 nm). The Ag QDs/Bi 4 O 5 Br 2 composites displayed the superior photocatalytic disinfection ability to the pure Bi 4 O 5 Br 2 . Especially, the 1000 Ag QDs/Bi 4 O 5 Br 2 composite exhibited the strongest photocatalytic ability with disinfecting all bacteria (1 × 10 7 cfu/mL) after 180 min visible light irradiation. The promoted photocatalytic ability of 1000 Ag QDs/Bi 4 O 5 Br 2 mainly be attributed to the synergistic effect of SPR produced by Ag and the formation of Schottky barrier which facilitate the separation efficiency of charge carrier and light utilization. The mechanism of photocatalytic disinfection over the Ag QDs/Bi 4 O 5 Br 2 composite was that the generated active species h + (hole) and · O 2 − (superoxide radical) disrupted the cell envelop to induce the leakage and decomposition of the cellular substances (e.g. protein, deoxyribonucleic acid (DNA) and potassium ion (K + )) as validated with the multiple techniques. This work open a new horizon to develop high-efficient Bi m O y X n -based photocatalytic disinfection materials.
研究领域:
材料科学
·
环境科学
·
纳米技术
·
光催化
·
微生物学
✓ 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）