JOURNAL OF ELECTRONIC MATERIALS
·
2020
·Vol. 49
·期 9
·5346-5352
·
IF 1.774
Yang Zhongxiang,Du Xiaoni,Shang Zhichao,Ren Xuanru,Shen Chengjin,Wang Xiaohong
In this study, we synthesized Bi 2 Mo 3 O 12 and Bi 2 Mo 3 O 12 /MoO 3 composites through a simple solution combustion synthesis (SCS) route. The structure, morphology, and photocatalytic property for the degradation of Congo Red (CR) were characterized by x-ray diffraction, scanning electron microscopy (SEM), x-ray photoelectron spectroscopy and ultraviolet–visible spectrophotometer absorption spectroscopy. The phases of the samples were characterized to be Bi 2 Mo 3 O 1 and Bi 2 Mo 3 O 12 /MoO 3 . The SEM results showed Bi 2 Mo 3 O 12 particles were uniformly distributed on the MoO 3 sheets. Bi 2 Mo 3 O 12 and MoO 3 in the Bi 2 Mo 3 O 12 /MoO 3 composites were clearly demonstrated by the lattice spacing from high-resolution transmission electron microscopy results. The maximum degradation rate of Bi 2 Mo 3 O 12 /MoO 3 composite was 83% at 60 min, showing excellent photocatalytic performance. A possible mechanism is proposed for the degradation of CR over Bi 2 Mo 3 O 12 /MoO 3 composites, in which h + and ·O 2− are the main active species and play an important role in the degradation of pollutants.
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
OPTICAL MATERIALS
·
2025
·
IF 4.2
Jinjie Zheng,Honglie Shen,Yufang Li,Huanlun Tong,Jingzhe Zhang,Zhihong Xie
In this study, a novel fabrication method for a bilayer film consisting of the Bi 2 Mo 3 O 12 :Eu 3+ and CaF 2 was developed. Bi 2 Mo 3 O 12 :Eu 3+ film was prepared using the chemical solution method, eliminating the need for separate phosphor preparation. The excitation spectra of Bi 2 Mo 3 O 12 :Eu 3+ displayed a broad band within the range of 300 and 420 nm. Under ultraviolet (UV) excitation, the material emitted strong red luminescence, with a dominant peak around 615 nm, which coincides with the absorption range of silicon solar cells. Additionally, a CaF 2 anti-reflection layer was introduced to enhance optical transmittance. The average transmittance of the Bi 2 Mo 3 O 12 :Eu 3+ @CaF 2 bilayer film reached 92.3%, representing a 0.7% increase compared to the bare glass substrate (91.6%). As a proof-of-concept, applying Bi 2 Mo 3 O 12 :Eu 3+ @CaF 2 to this bilayer film on photovoltaic modules resulted in an absolute enhancement of 0.19% in power conversion efficiency.
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DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2021
·
IF 3.247
Jingling Wang,Wensong Lin,Manru Dong,Yue Xing,Qicheng Zhang
In this work, the CdS quantum dots (QDs) decorated Bi2MoO6/Bi2Mo3O12 (BMO) heterojunction photocatalyst (C/BMO) has been successfully synthesized using a facile two-step hydrothermal method. The as-prepared photocatalysts were characterized by XRD, FTIR, XPS, FESEM, TEM, UV-vis DRS, PL and photoelectrochemical measurements to investigate the effects of CdS(QDs) and BMO heterojunction on the structure, morphology, optical and charge carrier transmission characteristics of the photocatalysts. Narrow band gap and superior catalytic activities were found in C/BMO as compared with pure BMO. Moreover, the C/BMO photocatalyst containing twice CdS content (2-C/BMO) exhibits even higher photocatalytic activity and stability. After exposure to visible light for 30 min, the degradation rate of Rhodamine B (RhB), Methylene blue (MB) and Ofloxacin (OFX) by 2-C/BMO reached 95%, 92% and 76%, respectively. Radicals scavenging experiments and electron spin-resonance spectroscopy (ESR) investigations indicated that the superoxide radical anions (∙O2− ), hole (h+) and hydroxyl radicals (•OH) are the dominating active species in the photodegradation processes. ∙O2− and h+ are the key factors in the degradation of RhB and OFX solutions, and •OH is the major determinant in removal of MB. The process and photocatalytic mechanism on 2-C/BMO was discussed. Well absorption of visible light, effective separation of photoelectron-hole pairs and the transportation of photogenerated carriers at the interfaces of ternary semiconductor heterojunction are suggested as the key factors to enhance the photocatalytic performance of the photocatalysts.
研究领域:
材料科学
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环境科学
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光催化技术
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DOI
PubMed
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2024
·Vol. 41
·期 7
·2017-2027
·
IF 2.9
Zhang Xin,Xu Songling,Shan Shufeng,Zeng Xingye,Zhou Rujin
Four different samples of pure scheelite α-Bi 2 Mo 3 O 12 were synthesized by the fast microwave-assisted hydrothermal method. By adjusting the pH in the preparation process, the morphologies and structures of the synthesized catalysts were changed. TG, XRD, SEM, TEM, BET, and XPS analyses were used to investigate the characteristics of the catalyst. The sample of α-Bi 2 Mo 3 O 12 was prepared at a calcination temperature of 500 °C and pH = 1 had the highest specific surface area propylene selective oxidation properties. The conversion of propylene was 28.3% and the selectivity of acrolein was 86.4%. Compared with α-Bi 2 Mo 3 O 12 prepared by co-precipitation and normal hydrothermal method, α-Bi 2 Mo 3 O 12 prepared by microwave hydrothermal method has higher propylene oxidizing activity. The conversion of propylene is negatively correlated with the crystallinity of the catalyst. This is due to the fact that higher crystallinity inhibits the lattice oxygen flow between the lattices, thus inhibiting the selective oxidation and reducing the conversion of the reaction. The oxygen mobility of α-Bi 2 Mo 3 O 12 samples was characterized by XPS. The results showed that the conversion of propylene of α-Bi 2 Mo 3 O 12 were positively correlated with its oxygen mobility strength. A probable mechanism for the selective oxidation of propylene was proposed. This work not only offers a high-efficiency method for the rapid preparation of bismuth molybdate catalysts but also extends the application of microwave-assisted hydrothermal synthesis in the field of selective oxidation of propylene.
研究领域:
催化化学
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材料科学
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环境化学
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Jinjie Zheng,Honglie Shen,Yufang Li,Long Wang,Zhihong Xie
Bi 2 Mo 3 O 12 : Pr 3+ phosphors have been successfully synthesized through a one-step solid-state reaction method. The effects of Pr 3+ concentration on lattice constants and optical properties were also studied. XRD patterns showed well-crystallized monoclinic structures for the prepared Bi 2 Mo 3 O 12 and Bi 2 Mo 3 O 12 : Pr 3+ samples. The UV–visible diffuse reflectance spectra indicated strong absorption in the ultraviolet region. Excitation spectra demonstrated that the Bi 2 Mo 3 O 12 : Pr 3+ could be efficiently excited under UV light in the 250–430 nm range and blue light at 450 nm. By varying the excitation wavelength, the emission color could be tuned from orange-red to red region. The strongest emission peak is located at around 597 nm, which is attributed to the 1 D 2 → 3 H 4 transition of Pr 3+ . An optical thermometer based on fluorescence intensity ratio (FIR) shows a high sensitivity of S r = 2.02 % K −1 , indicating the developed materials have potential applications in the optical temperature sensing field.
研究领域:
材料科学
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发光材料
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光学传感器
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固态化学
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光子学
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DOI
高影响因子
JOURNAL OF CATALYSIS
·
2022
·
IF 8.047
Adugna Boke Abdeta,Qinhan Wu,Dong-Hau Kuo,Ping Li,Hanya Zhang,Ting Huang,Jubin Zhang,Jinguo Lin,Xiaoyun Chen
The Mo-nonstoichiometry, oxygen vacancy, and S incorporation into Bi-Mo bimetallic oxide enhance the activity by creating defects that improve charge carrier separation efficiency and narrow bandgap energy. Oxygen vacancies synergistically attired nonstoichiometric and Mo-deficient and O-deficient Bi 2 Mo 3-x (S,O) 12-y oxysulfide (Mo-/O-deficient Bi 2 Mo 3 (S,O) 12 ) is found by a one-pot facile method to enhance the photocatalytic H 2 evolution and pollutant reduction via in-situ generated protons. The best Mo-/O-deficient Bi 2 Mo 3 (S,O) 12 catalyst with x = 0.75 and oxygen vacancy content of 27.6 % produced 480.87 µmol/h H 2 with 25 mg catalyst and achieved AQE of 14.26 % at λ = 420 nm, whereas reduced 88.9 % 4-NP and 91.6 % RhB by in-situ generated protons. Bi-non-stoichiometry leads to Mo 4+ and oxygen vacancy formation and creates active reaction sites of oxygen vacancy and active surface oxygen. These enhancements benefit photogenerated carrier separation efficiency and fast electron transfer and achieve Mo-/O-deficient Bi 2 Mo 3 (S,O) 12 with superb PHER. Therefore, non-stoichiometry and sulfur doping into Bi 2 Mo 3 O 12 bimetallic oxide is a promising approach for designing novel and synergistically defect-attired oxysulfide photocatalysts.
研究领域:
材料科学
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环境科学
·
化学工程
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DOI
高影响因子
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