FOOD CHEMISTRY
·
2025
·
IF 9.8
Kun Xu,Rui Xu,Xuejing Liu,Qin Wei
A handily self-powered photoelectrochemical (PEC) sensor is established for acetamiprid (ACE) analysis supported by Cu 3 Mo 2 O 9 /Ag 2 S photoanode and Cs 3 Bi 2 Br 9 /BiOBr photocathode. The band gap structure of Cu 3 Mo 2 O 9 and Ag 2 S is matched which enhanced the electron transfer rate. Photocathode composite is synthesized at the interface of water and oil, and the resulting composite has good stability to water and light. Electrons flowing from the photoanode through the external circuit to the photocathode can combine with photogenerated holes of Cs 3 Bi 2 Br 9 /BiOBr, causing the photoelectrons pass into the solution and react with oxygen, and producing a large photocathode current. With the increase of ACE concentration, the detected photocurrent gradually decreased due to the steric hindrance, and a linear relationship between photocurrent and ACE concentration in the range of 0.001–500 nM. This excellent PEC sensor also performed the great detection stability, selectivity and reproducibility, which can also be applied in practical application for pesticides analysis.
研究领域:
分析化学
·
环境科学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·
IF 3.7
Lihan Deng,Pengfei Chen,Jin Li
BiOBr nanosheets were loaded onto SnO 2 quantum dots, ZnO nanosheets, and SnO 2 /ZnO-2 (SZ-2) to form different heterojunction photocatalysts by sonochemistry, respectively. The photocatalytic activity of the prepared photocatalysts was evaluated by degrading the target dye Rhodamine B (RhB). The results showed that the degradation efficiency of BiOBr/SnO 2 /ZnO (BSZ) for RhB reached 97.5% at 80 min. The significant increase in catalytic activity of BSZ was attributed to the synergistic and interfacial effects among the three materials. Combined with the radical trapping experiments, it can be concluded that the catalytic mechanism of BSZ as a dual Z-type heterojunction.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zhuo Chen,Zhiyang Lu,Weijun Tian,Bingkun Liu,Bingjie Huo,Jing Zhao,Mengyuan Zou,Ruijuan Zhang,Xinran Yu,Xinbo Wang
Pyrene (Pyr) and its derivatives are classified as Persistent Organic Pollutants (POPs), which exhibit significant toxicological effects and pose serious threats to ecosystems. Photocatalytic technology is increasingly employed for the remediation of POPs due to its effective and environmentally sustainable degradation capabilities. However, conventional photocatalytic materials, primarily in powder form, face challenges related to separation and recovery from aqueous environments, significantly limiting their practical application. In this study, we successfully synthesized a three-dimensional (3D) porous immobilized photocatalytic material by decorating Ag 3 PO 4 and BiOBr onto Ni foam (NF) using a hydrothermal method combined with continuous ionic layer adsorption. The results demonstrated Ag 3 PO 4 /BiOBr/NF exceptional light degradation capabilities, achieving over 90 % degradation of Pyr, 1-methylpyrene, and 1-hydroxypyrene, as well as over 40 % degradation of 1-nitropyrene under visible light irradiation over a duration of 5 h. Its degradation efficiency decreased by 12.49 % after five cycles, demonstrating its reusability. The roles of superoxide radicals ( O 2 – ) and holes (h + ) were critical in the degradation process. Furthermore, based on experimental findings, we proposed a Z-type heterojunction degradation mechanism for the Ag 3 PO 4 /BiOBr/NF composite, accompanied by an analysis of the potential degradation pathways for Pyr. Consequently, the recyclable immobilized photocatalytic materials developed in this research contribute novel insights into the photocatalytic degradation of POPs.
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 PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2021
·Vol. 127
·期 4
·1-10
·
IF 2.584
Mao Tingjie,Yang Xiaoling,He Yingzhi,Wang Tingting,Liang Qiu,Zhang Guobang,Tong Yanhua
Reinforcing light harvesting is an effective means to improve photocatalytic efficiency of semiconductors. In this study, carbon-quantum-dot-modified BiOBr mixed with SiO 2 nanospheres (BiOBr/CQDs + SiO 2 ) were prepared via stepwise chemical precipitation route. The characterizations of X-ray diffraction, field-emission scanning electron microscopy and energy-dispersive X-ray apparatus demonstrated that the as-prepared BiOBr/CQDs + SiO 2 displayed nanosheets-building spherelike hierarchical nanostructures mixing with dispersive SiO 2 nanospheres. Control photocatalytic degradation of orange II under natural sunlight illumination indicated that the presence of SiO 2 nanospheres could further promote the photocatalytic behaviors of BiOBr/CQDs apart from CQDs. Diffuse reflection spectrum demonstrated that SiO 2 nanospheres were capable of reflecting UV − Vis light near to 100%. The possible mechanism for the enhanced light-absorption surface of suspending hierarchical photocatalyst in presence of SiO 2 nanospheres was proposed via light propagation over suspending SiO 2 nanospheres under vertical light illumination. Our method for enhancing photocatalytic efficiency provided a general method to enhance light harvesting of every suspending two- or three-dimensional photocatalysts.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Xiaojing Yu,Haoran Qiu,Bin Wang,Qingnan Meng,Shaodong Sun,Yufei Tang,Kang Zhao
To construct Z-scheme not only can effectively separate the excited electron-hole pairs, but also utilize the ample redox capability of each semiconductor component in this system for the surface photocatalytic reaction. In this work, a TiO 2 –Au–BiOBr ternary Z-scheme photocatalyst was constructed, in which Au NPs were used as the electron mediator to join BiOBr nanosheets and TiO 2 nanofibers . The results showed that, under full spectrum irradiation, TiO 2 –Au–BiOBr nanofibers exhibited outstanding photocatalytic performance toward the degradation of Rhodamine B (RhB) with an excellent photodegradation efficiency of 99.91% within 30 min as well as good stability. The reaction mechanism of the TiO 2 –Au–BiOBr Z-scheme system was systemically studied by XPS , photoelectrochemical tests and free radical trapping experiments, etc. Moreover, the photocatalyst also exhibited excellent photocatalytic activity for degrading methyl orange and methylene blue.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yingyue Hu,Xinyao Hu,Lu Xue,Baolong Cui,Yi Du
The modulation of crystal surface is one of the important means of photocatalyst modification. BiOBr photocatalyst with exposed (1 1 0) facets was synthesized at room temperature and pressure using CaCO 3 as a directing agent in this experiment. The addition of CaCO 3 not only promoted the exposed facets of BiOBr from (1 0 2) to (1 1 0), but also improved its ability of photocatalytic degradation of pollutants, meanwhile, changed the specific surface area of BiOBr, provided more active sites, and enhanced the adsorption capacity of BiOBr. At the same time, the effects of different alkaline earth metals on the performance of BiOBr photocatalytic materials were compared, it was determined that the degradation rate of RhB of BiOBr photocatalyst reached 97% within 60 min when adding 500 wt% CaCO 3 , and the main active group in the degradation experiment was h + . In conclusion, BiOBr with different main exposed facets was prepared in this paper, and a new idea was provided for alkaline earth metals in the field of photocatalysis.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Mingyue Piao,Xinyue Liu,Hongxue Du,Lingzi Zhao,Honghui Teng
Thiamethoxam is a highly effective pesticide that is utilized all over the world. It must be removed from water since it is hazardous to aquatic life and bio-accumulative. Photocatalysis is a popular method to remove pollutants. Here, the solvothermal approach was used to create the photocatalytic composite based on Eu 2 O 3 and BiOBr. SEM, XRD, and photoluminescence spectroscopy were used to characterize the composite's structure and determine its characteristics. The effects of Eu 2 O 3 loading, solution pH, and dosage of catalysts on the degradation efficiency were tested. The best removal results were occurred when 1.0 g/L of Eu 2 O 3 /BiOBr with 1 mol% of Eu 2 O 3 loading on BiOBr was added. Approximately 81.9% of thiamethoxam was degraded within 120 min under UV irradiation. A wide pH range was suitable for the catalytic process. Additionally, Eu 2 O 3 /BiOBr can be recycled six times without obviously losing catalytic activity. Scavenging experiments demonstrated that the primary active species in the photocatalytic degradation of thiamethoxam was hydroxyl radicals, and a potential photocatalytic process was hypothesized in light of the scavenging experiment findings. The materials created for this investigation showed potential uses for pesticides' quick removal.
研究领域:
环境科学
·
材料科学
·
农药去除技术
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2021
·
IF 3.423
Wenjing Dong,Tianyi Xie,Haiyi Peng,Haishen Ren,Huixing Lin
BiOBr photocatalytic active coatings on bismuth-boron-zinc glass carrier using acid etching synthesis were obtained. The effect of direct and indirect corrosion of the glass layer on the bonding ability of the coatings and the substrate were studied. Specially, the BiOBr photocatalytic coating obtained by acid etching after crystallization of the glass has stronger bonding ability with the glass substrate. This is because the needle-like crystal structure after crystallization can be used as a transition layer to closely combine the glass and the photocatalytic coating. In this paper, the concept of plant cultivation was introduced to explain that the coating prepared by the indirect method had a better bonding force with the substrate. This research solves the traditionally difficult recycling problem of degrading organic pollutants in the form of powder, and the preparation method is simple and suitable for industrial mass production.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2021
·Vol. 11
·期 14
·4783-4792
·
IF 6.119
Yi Zhang,Shuo Gu,Xiaoyu Zhou,Kaiyue Gao,Kai Sun,Di Wu,Jingjing Xia,Xiufang Wang
Photocatalytic nitrogen fixation performance is mainly hampered by slow carrier transport and inefficient surface reaction, where surface oxygen vacancies have been proved to alleviate these limitations. However, there are a few reports on the introduction of metal vacancies into photocatalysts and the effect of metal vacancies on the N2 photofixing properties. Herein, we injected bismuth vacancies (VBi) into the surface of BiOBr nanospheres with oxygen vacancies (VO) via an ion exchange strategy to form hierarchical Bi2MoO6/BiOBr composite structures. The intentionally introduced VBi adjust the band structures of VO–BiOBr and act as charge separation centers in coordination with VO, which improves the separation efficiency of electron–hole pairs. The presence of VBi and the Bi2MoO6 phase enhances the light absorption of the composite materials. Additionally, the hierarchical nanosheet assembly structure facilitates the surface adsorption and activation of N2 on the catalyst. In particular, the optimal defect-rich Bi2MoO6/VBi+O–BiOBr exhibits the best photocatalytic ammonia production activity. After two hours, the NH3 yield was 412.18 mol L−1 without any noble metal cocatalyst and sacrificial agent, and was nearly 4 times higher than that of the original VO–BiOBr (96.08 mol L−1). This work provides a new inspiration for the design of efficient N2 immobilizing photocatalysts through synergistic metal and oxygen vacancy engineering.
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
Functional Materials Letters
·
2021
·
IF 2.17
Fengjuan Ge,Jie Zhu,Yan Xu,Jing Li,Xueyang Zhang
BiOBr photocatalysts were prepared by changing the solvent and synthesis method. SEM, XRD and BET characterization shows that the sample prepared in high-viscosity solution by precipitation method has tremella-like microstructure, with smaller size and higher surface area. Among them, the BiOBr prepared in glycerol solution (GR-P) has the highest surface area of 113.8 m 2 ⋅ − 1 . XRD also indicates that the GR-P has much more exposed (110) facets than other samples. The Rhodamine B degradation tests show that the GR-P has the best activity on both deethylation and aromatic ring destruction steps, indicating that the exposed (110) facets promote the degradation process.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 36
·9778-9785
·
IF 5.976
Qiang Zhang,Yan Xu,Zhuopeng Wang,Xia Zhang,Zhiguo Xia
Dual-emitting hierarchical Bi4(GeO4)3/Zn2GeO4 hybrid microspheres have been prepared by a facile one-pot hydrothermal synthesis of Zn2GeO4 with the addition of pre-synthesized BiOBr nanoplates. The phase composition and morphology evolution of the Bi4(GeO4)3/Zn2GeO4 composites are investigated depending on the amounts of BiOBr precursor used in the hydrothermal process. The photoluminescence peaks at 412 and 532 nm for the as-prepared Bi4(GeO4)3/Zn2GeO4 are ascribed to Bi3+ emission and defect-related centers in the Zn2GeO4 component, respectively, and the features show a quenching response toward a temperature increase. The fluorescence intensity ratio (FIR) of Bi3+: 3P1–1S0 (412 nm) to the defect emission center of Zn2GeO4 (532 nm) can be exploited as a self-calibrated temperature index for potential thermometer applications. The maximum relative sensitivity (Sr) is 3.96% °C−1 in the temperature range of 20 °C to 100 °C. This work expands the rational design strategy for controllable particle morphology and structure modulation, and further explores their synergetic distinctive properties and potential optical sensor applications.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yu Fang,Yang Cao,Bihui Tan,Qianlin Chen
Solar energy can be used as “green” energy by photocatalysis for the nitrogen fixation under the atmospheric conditions compared with the traditional energy-intensive industrial production of ammonia. However, the complex kinetics and high reaction barriers greatly hinder the development of the photocatalytic N2 reduction reaction. Herein, a BiOBr/MXene-Ti3C2 composite catalyst is prepared by the simple electrostatic adsorption and self-assembly method. The as-prepared 10 wt % BiOBr/Ti3C2 exhibits the best performance for N2 fixation to NH3 by photocatalysis. The evolution rate of NH3 is up to 234.6 μmol·g–1·h–1, which is approximately 48.8 times and 52.4 times higher than those of pure BiOBr and Ti3C2, respectively. It is found that the designed double vacancies of oxygen and titanium for BiOBr/Ti3C2 composites, with the availability of localized electrons, have the ability to adsorb and activate N2, which can be efficiently reduced to NH3 by the interfacial electrons transferred from the excited BiOBr/Ti3C2 composite. In addition, the results of in situ Fourier transform infrared show the generation of NxHy species by the continuous protonation processes. Moreover, titanium vacancy (VTi) induces a strong absorption energy for nitrogen atoms on the surface of BiOBr/Ti3C2 according to the density functional theory calculations. In particular, the P-electron feedback caused by VTi could effectively promote the weakening of the N≡N triple bond and elongate the N2 bond length by ∼31.6%. This work might provide new insights into the synergistic effect of double defects and inspiration for the rational design of catalysts by defect engineering in the field of catalytic synthesis of ammonia.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）