Nanoscale
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2015
·Vol. 7
·期 28
·11991-11999
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IF 7.394
Zan Dai,Fan Qin,Huiping Zhao,Fan Tian,Yunling Liu,Rong Chen
Hierarchical Bi3.64Mo0.36O6.55/Bi2MoO6 isotype heterostructures were successfully prepared via a one-pot hydrothermal route by using Bi2O3 porous nanospheres as a sacrificial template. By tuning the reaction time, the formation process of the Bi3.64Mo0.36O6.55/Bi2MoO6 heterostructure involving Mo etching, phase transition and anisotropic growth was clearly identified. More importantly, the Bi3.64Mo0.36O6.55/Bi2MoO6 heterostructure displayed remarkably enhanced photocatalytic activity for dye photodegradation than pure phase bismuth molybdate due to the efficient electron–hole separation and the interfacial photogenerated hole migration from inside the Bi3.64Mo0.36O6.55 layer to outside the Bi2MoO6 layer. The opposite hole migration from the outer layer to the inner layer was also detected in Bi2O3/Bi2WO6 heterostructures, which resulted in the decrease of photocatalytic activity, further verifying the importance of hole migration direction. This work provides a novel route to fabricate heterostructured photocatalysts, as well as gives a strategy for mediating the charge migration to improve photocatalytic performance.
研究领域:
材料科学
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环境科学
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Ruiying Zhai,Yijie Yang,Peilin Lei,Jiahao Lu,Sisi Chen,Xiaoqi Sun
In this article, a green pigment Bi 1.95-x Pr x W 0.05 MoO 6+δ (x = 0.1–0.5) co-doped with Pr and W was developed using high temperature solid-phase synthesis method. The microstructure, color performance, and optical characteristics of the novel pigment was analyzed using x-ray diffraction instrument (XRD), field-emission scanning electron microscopy (FESEM), L∗ a∗ b∗ color date, and ultraviolet–visible–near infrared light spectrophotometer. The results indicate that all the samples possess a monoclinic structure, characterized by the space group P21/c(14). Compared to Bi 2-x Pr x MoO 6+δ doped solely with Pr 6 O 11 , the Pr/W co-doped Bi 2 MoO 6 pigment demonstrates superior green coloration. The solar reflectance in the near-infrared region of all pigment samples exceeds 80 %, highest value reaches 92.82 %. In thermal insulation tests, the temperature difference between the Bi 1.95-x Pr x W 0.05 MoO 6+δ pigment coating and a blank galvanized sheet reaches up to 10.3 °C after 60 min under infrared lamp irradiation. The color difference Δ E∗ of the pigment powder after immersion in acid and alkali solution and high-temperature calcination are less than 5, indicating good chemical stabilities in acidic, alkaline and high-temperature environments. To our knowledge, Bi 1.95-x Pr x W 0.05 MoO 6+δ has the highest reflectivity among green pigments without toxic metals.
研究领域:
材料科学
·
环境科学
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APPLIED SURFACE SCIENCE
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2026
·
IF 6.6
Mingnv Guo,Yulin Chen,Jiahao Liu,Jiaqi Qiu,Wenjing Wang,Zhongqing Yang
This study employs a Cu–Ni co–doping strategy to construct a Bi 2 MoO 6 photothermal synergistic catalyst, achieving highly efficient conversion of CO 2 reduction. Under ultraviolet–visible (UV–Vis) xenon lamp irradiation and 200 °C external heating conditions, the optimal sample (3Cu-6Ni-Bi 2 MoO 6 ) exhibited CO and CH 4 yields of 293.16 μmol·g −1 and 98.43 μmol·g −1 respectively, within 4 h, representing 6.8-fold and 5.3-fold increases compared to the undoped sample. The significant enhancement in CO 2 conversion activity can be attributed to the following factors: (1) Co-doping with Cu 2+ and Ni 2+ induces lattice distortion and oxygen vacancy formation, generating defect energy levels near the valence band edge. This reduces the bandgap to 2.1 eV, thereby broadening the visible light absorption range; (2) Oxygen vacancy defects provide highly efficient CO 2 adsorption and activation sites; (3) Doping with Cu and Ni enhances the separation and transport efficiency of photogenerated carriers.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Junwei Yin,Zipeng Xing,Junyan Kuang,Zhenzi Li,Meng Li,Jiaojiao Jiang,Siyu Tan,Qi Zhu,Wei Zhou
Bi plasmon-enhanced mesoporous Bi 2 MoO 6 /Ti 3+ self-doped TiO 2 microsphere heterojunctions (Bi-BMO/TiO 2-x ) have been synthesized by a mild hydrothermal method combined with an in situ solid-state chemical reduction process, and subsequently annealed at 400 °C in N 2 atmosphere. The prepared Bi-BMO/TiO 2-x photocatalysts are characterized by X-ray diffraction, N 2 adsorption, scanning electron microscopy, transmission electron microscopy , and X-ray photoelectron spectroscopy. The results reveal that Ti 3+ self-doped TiO 2 is loaded on surface of mesoporous Bi 2 MoO 6 microsphere efficiently and metallic Bi is produced for surface plasmon resonance (SPR). Under visible-light irradiation, the heterojunctions photocatalyst shows excellent photodegradation and photoelectrochemical properties of ∼95% for phenol removal rate and 20 μA/cm 2 for photocurrent density, respectively, which is several times higher than that of single component. Moreover, it also has high photocatalytic oxygen production with a rate of 134 μmol h -1 g -1 . The enhanced photocatalytic activities are mainly attributed to the existence of Ti 3+ self-doping and heterojunction structure, which narrow the band gap to extend photoresponse to visible light region. Another reason is the influence of SPR of metallic Bi. They all promote the spatial separation and transfer of photogenerated charge carriers.
研究领域:
材料科学
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环境科学
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CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Yingzhang Shi,Ke Xie,Zhiwen Wang,Cheng Liu,Sen Lin,Ling Wu,Shijing Liang
Bi 2 MoO 6 hierarchical microspheres (BMO-SP) consisting of monolayer nanosheets with abundant surface oxygen defects and unsaturated Mo sites are constructed for the one-pot synthesis of secondary amine via a photocatalytic coupling reaction of nitrobenzene (NB) and benzyl alcohol (BA). The performance of this photocatalyst is 12 times higher than that of bulk Bi 2 MoO 6 (BMO-bulk). Experiment results and density functional theory calculations reveal that surface oxygen defects induce more unsaturated Mo atoms facilitating the coordination activation of NB and BA molecules through the formation of –N–O···Mo and –C–O···Mo coordination, respectively. The surface oxygen defects also promote the separation of photogenerated carriers. More photogenerated holes transfer to the surface for oxidizing the activated BA while the photogenerated electrons are trapped by oxygen defects for reducing NB. Thus, the photocatalytic performance is markedly improved. This work successfully designs an efficient photocatalyst for the tandem reaction via surface defect engineering.
研究领域:
材料科学
·
催化化学
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DESALINATION
·
2026
·
IF 9.9
Zhouxiao Zhai,Jingce Bi,Linshan Wang,Ningning Liu,Yi Wang,Xia Zhang,Zhuopeng Wang,Yide Han
A g-C 3 N 4 /Bi 2 MoO 6 /Bi 2 WO 6 ternary heterojunction was constructed via simple mechanical grinding and thermal treatment. • GBMW follows a dual Z -scheme charge-transfer pathway, preserving strong redox capability for enhanced photocatalysis. • U(VI) acts as an electron acceptor to promote charge separation and improve photocatalytic performance. Due to the difficulty of conventional photocatalytic systems in simultaneously achieving strong oxidation and reduction processes, the treatment of wastewater containing coexisting uranium and organic pollutants remains a critical challenge in the field of photocatalysis. Herein, a novel g-C 3 N 4 /Bi 2 MoO 6 /Bi 2 WO 6 (GBMW) ternary photocatalyst with a dual Z -scheme heterojunction architecture was rationally constructed for the removal of U(VI) and tetracycline (TC) under visible-light irradiation. The dual Z-scheme heterojunction extends the visible-light response range and accelerates interfacial charge transfer, while preserving strong redox potentials. Within 100 min, GBMW achieves a U(VI) reduction efficiency of 91.6% and a TC degradation efficiency of 97.6%, with corresponding k obs values of 0.02332 and 0.03664 min −1 , respectively, which are significantly superior to those of BiMO, BiWO, GCN and GBW. Notably, U(VI) can act as an efficient electron acceptor to promote the separation of electrons and holes in GBMW, which significantly facilitates the degradation of TC. Moreover, GBMW demonstrates excellent stability and anti-interference performance in various real water matrices. This work not only provides a feasible strategy for constructing high-efficiency dual Z -scheme heterojunctions photocatalysts, but also offers an effective solution for treating complex wastewater containing coexisting organic pollutants and radioactive contaminants. Download: Download high-res image (264KB) Download: Download full-size image
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LANGMUIR
·
2026
·
IF 4.4
Lei Zhang,Jianhao Qiu,Guanglu Xia,Chen Chen,Meng Liu,Yiliang Chen,Jianfeng Yao
Element doping has attracted extensive attention as a strategy to regulate the electronic structure of catalysts. In this study, Ni-doped Bi2MoO6 nanosheets were uniformly anchored onto rod-like In2O3 to furnish substantial accessible reactive sites and close interfacial contact. Ni doping enabled a precise modulation for the band configuration of Bi2MoO6, imparting a Z-scheme heterojunction between Ni-doped Bi2MoO6 and In2O3. The Ni-doped Bi2MoO6/In2O3 Z-scheme heterojunction exhibits excellent photocatalytic performance in the treatment of Cr(VI) and emerging organic contaminants. In the Cr(VI)/bisphenol A coexistence system, Ni-doped Bi2MoO6/In2O3 not only achieved high reduction efficiency for Cr(VI), but also enhanced the degradation rate of bisphenol A by a factor of 4.7 compared to the single-pollutant system. The removal efficiencies could surpass many related reported studies. The product toxicity after bisphenol A degradation in a mixed Cr(VI)/bisphenol A system was analyzed by the total organic carbon content, high-performance liquid chromatography-tandem mass spectrometry, the toxicity estimation software tool, and microbial activity, manifesting that their impact on the environment has been greatly reduced. Furthermore, the catalyst maintains stable and consistent performance in multiple binary systems, including Cr(VI)/tetracycline and Cr(VI)/ciprofloxacin. This work provides insights for the design of element-doped heterojunction catalysts, which demonstrate high performance, durability, and environmental compatibility in the treatment of complex wastewater.
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高影响因子
MATERIALS & DESIGN
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2024
·
IF 7.6
Cuilu Xi,Jiang Xu,Haonan Chen,Jiawen Wang,Xinna Zhang,Yinyan Li,Gongxun Bai,Hui Xu,Zhen Xiao,Shiqing Xu
Among numerous polluting compounds, the organic dyes and antibiotics are two servious factors causing water pollution. Hence, it is urgent to find a fast and safe way to degrade waste water in a sustainable approach. Here, ferroelectric heterostructure based on 2D Bi 2 MoO 6 nanosheets and Bi 2 S 3 nanorods has been prepared by a two-step solvothermal method for the reduction of organic dyes and antibiotics. Due to the energy band balance between Bi 2 S 3 and Bi 2 MoO 6 , the formed type-II heterostructure can populate charge transfer at the junction and effectively inhibit electron-hole recombination. Under ultrasonic stimulation, catalytic active sites of a Bi 2 MoO 6 /Bi 2 S 3 heterostructure for pollutant degradation can be generated through rapid charge transfer activation, thus enhancing the catalytic degradation effect of organic dyes and antibiotics. The Bi 2 MoO 6 /Bi 2 S 3 heterostructure not only has good degradation effect, but also shows better stability. This work opens up new avenues for designing highly-efficient catalysts, which is of importance for wastewater degradation and energy-saving applications.
研究领域:
环境科学
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材料科学
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Small
·
2024
·
IF 13
Guiyuan Zhang,Sumei He,Junwu Wei,Pan Ran,Huan Zheng,Long He,Xiaohong Li
Sonodynamic therapy is confronted with the low acoustic efficiency of sonosensitizers, and nanozymes are accompanied by intrinsic low catalytic activity. Herein, to increase the piezopotential of N-type piezoelectric semiconductors, the P-N heterojunction is designed to inhibit the piezoelectric screening effect (PSE) and increase electron utilization efficiency to enhance nanozyme activity. P-type Cu x O nanoparticles are in situ grown on N-type piezoelectric Bi 2 MoO 6 (BMO) nanoflakes (NFs) to construct heterostructured Cu x O@BMO by interface engineering. Cu x O deposition leads to lattice distortion of BMO NFs to improve piezoelectric response, and the strong interface electric field (IEF) suppresses PSE and increases piezopotential. The nonlocal piezopotential, local IEF, and glutathione (GSH) inoculation enhances electron−hole separation and increases peroxidase (POD)-like activity of BMO and GSH oxidase (GSHOx)-like activity of Cu x O with high selectivity. The heterojunction formation causes the transfer and rearrangement of interface electrons, and the increased piezopotential accelerates electron transfer at interfaces with bacteria, thus increasing the production of reactive oxidative species and interfering with adenosine triphosphate synthesis. The heterostructured nanozymes produce abundant intracellular ·OH and achieve 4log magnitude reductions in viable bacteria and effective biofilm dispersion. This study elucidates integral mechanisms of nanozyme and acoustic catalysis and opens up a new way to synergize high piezopotential and nanozyme-catalyzed therapy.
研究领域:
材料科学
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纳米技术
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生物医学工程
·
抗菌研究
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Mengyuan Ren,Fengzhang Ye,Jiu Luo,Wei Xie,Junqing Ye,Mingyang He,Junfeng Qian,Qun Chen
Hydrogen (H2) energy is a clean, renewable energy carrier with a high energy density and zero carbon emissions. Photocatalytic water splitting offers a promising route to H2 production by utilizing abundant solar energy; yet, it is often limited by sluggish charge carrier kinetics and low quantum efficiency. Herein, we incorporate graphene quantum dots (GQDs) as cocatalysts into the S-scheme heterojunction inorganic semiconductor Bi2MoO6@Cu2O (BMO@Cu2O) to boost photocatalytic H2 evolution. Under simulated sunlight, the GQDs/BMO@Cu2O composite achieves an exceptional H2 production rate of 16.1 mmol·g–1·h–1 and an apparent quantum yield of 33.6% at 420 nm. The built-in electric field (IEF) between BMO and Cu2O promotes S-scheme charge transfer, enhancing carrier separation. GQDs function as electron acceptors and active sites, where their delocalized π-electron cloud in the sp2-hybridized carbon skeleton shortens charge migration paths and lowers the energy barrier for surface H2 evolution. In situ X-ray photoelectron spectroscopy, Kelvin probe force microscopy, and density functional theory calculations collectively confirm the IEF and S-scheme electron transfer. This work presents a strategic design of GQDs-mediated heterojunctions with efficient charge separation and strong redox capacity, advancing solar-driven H2 production technology.
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CHEMOSPHERE
·
2022
·
IF 8.943
Mengying Xu,Yichao Deng,Shanhu Li,Jingyan Zheng,Jieyu Liu,Pier-Luc Tremblay,Tian Zhang
Effective strategies to improve charge separation in semiconductor particles are critical for improving the photodegradation of organic pollutants at levels sufficient for environmental applications. Herein, Bi 2 MoO 6 (BMO MOF ), comprising both nanoparticles (NPs) and quantum dots (QDs), was synthesized from a bismuth-based metal-organic framework (Bi-MOF) precursor. Surface defects on BMO MOF , the combination of NPs and QDs, and modified energy band edges improved photogenerated charge separation and facilitated redox reactions. When compared to BMO derived from uncoordinated Bi, the BMO MOF photocatalyst (PC) was more efficient at photodegrading tetracycline hydrochloride (TCH) and ciprofloxacin (CIP), two widely-used antibiotics ubiquitous in wastewater, as well as the carcinogenic pollutant rhodamine B (RhB). BMO MOF was then loaded on the biopolymer bacterial cellulose (BC) to further enhance photocatalytic performance and facilitate the recovery of the PC after water treatment processes. The novel BMO MOF /BC photocatalytic flakes were significantly larger than pure BMO MOF , and thus easier to recuperate. Furthermore, anchoring BMO MOF on BC flakes augmented significantly the photodegradation of TCH, CIP, and RhB, mainly because hydroxyl groups in BC act as hole traps facilitating photogenerated electron-hole separation. Results obtained with BMO MOF /BC highlight promising approaches to develop optimal PCs for aqueous pollutants degradation .
研究领域:
环境科学
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材料科学
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高影响因子
SOLID STATE SCIENCES
·
2025
·
IF 3.3
Huadong Liu,Xiaoyu Sun,Jingliang Cheng,Zhonghao Zhao,Cong Zhang
Bi 2 MoO 6 , a Bi-based semiconductor catalyst, exhibits effective degradation of organic pollutants. Nevertheless, its photocatalytic performance is constrained by several limitations, such as inadequate sunlight absorption, poor charge mobility, and fast charge carrier recombination upon photoexcitation. In this research, we successfully synthesized a Bi 2 MoO 6 composite modified with carbon quantum dots (CQDs), which demonstrates a significant improvement in photocatalytic performance. A series of characterizations and photocatalytic experiments were performed on the synthesized CQDs/Bi 2 MoO 6 samples. Degradation experiments revealed that under simulated sunlight, the CQDs/Bi 2 MoO 6 composite achieved a 95 % degradation rate for Rhodamine B (RhB) within 70 min, with a kinetic constant of 0.03994 min −1 . In comparison, the undoped Bi 2 MoO 6 sample degraded only 46 % of RhB under the same conditions, exhibiting a kinetic constant of 0.00658 min −1 . The primary reactive species, ·O 2 − and h + , were unequivocally identified through combined ESR spectroscopy and radical scavenging experiments as the drivers of pollutant degradation. Furthermore, after four consecutive reaction cycles, the catalyst maintained 90.05 % of its initial activity, confirming its high stability. In summary, this study successfully developed a CQDs-doped Bi 2 MoO 6 composite photocatalyst, offering a promising strategy for advancing photocatalysis research.
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