APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 19.7
Xuefei Li,Cheng Cheng,Lixia Yang,Zhenglin Chen,Shuqu Zhang,Jianping Zou
Bi 3+ doping enhances the singlet oxygen ( 1 O 2 ) lifetime. • Oxygen vacancy-rich Bi-Co 3 O 4 catalyst. • Under irradiation, Bi-Co 3 O 4 can efficiently degrade toluene and sterilize bacteria. • Bi-Co 3 O 4 exhibits efficient antibacterial activity, providing new insights for practical indoor air purification Developing efficient materials with excellent adsorption properties and photoactivity is pivotal for photocatalytic abatement of VOCs and bacteria in the air. Herein, Bi 3+ -doped Co 3 O 4 (Bi-Co 3 O 4 ) photocatalysts were successfully synthesized via a one-step hydrothermal-calcination method. Incorporation of Bi 3+ ions induces lattice distortion in Co 3 O 4 , generating oxygen vacancies (OVs), which subsequently modulates the electronic structure of Co 3 O 4 and produces singlet oxygen species ( 1 O 2 ) with a lifetime of 30 min. The Bi-Co 3 O 4 , with a geometric area of 24 cm 2 , achieves complete degradation (100%) of 50 ppm toluene within 30 min and a high mineralization rate of 93.4%. It retains outstanding photocatalytic activity even after multiple usage cycles. Notably, high-reactivity oxygen species at the Bi-Co 3 O 4 interface can effectively eliminate Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ). This work offers theoretical insights for the design of stable and efficient photocatalysts aimed at improving indoor air quality. Download: Download high-res image (212KB) Download: Download full-size image
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Tianjian Dang,Guanghua Lu,Runren Jiang,Min Wang,Xiqiang Zheng
Constructing stable, efficient, and affordable visible-light-driven catalysts is a promising technique to remediate water pollution from released antibiotics. In this research, etched Bi@MIL-125 composites were manufactured using a simple hydrothermal method, and their photocatalytic efficacy was tested using tetracycline (TC) as the target contaminant. Morphological analyses indicated that Bi nanoparticles (NPs) were consistently wrapped around the MIL-125 surface, introducing mesoporous structures in MIL-125 by Bi etching. Among different mass ratios (Bi: MIL-125), the Bi@MIL-125 sample with a 1:1 mass ratio (BM100) showed the greatest photodegradation rate (98.6 %) of TC upon visible light illumination. The BM100 exhibited the greatest apparent deterioration rate constant for TC (0.036 min −1 ), 74 times higher than that of pristine MIL-125. The absorption enhancement of Bi@MIL-125 in the visible range was ascribed to the surface plasmon resonance effect of Bi NPs. The mesoporous structure of Bi@MIL-125 provided channels through which TC entered the composite's interior, and the confined space enabled more opportunities for the interaction of •O 2 – and h + active species and TC pollutant molecules. In addition, liquid chromatography-tandem mass spectrometry was used to determine potential intermediates of the photodegradation reaction of TC and BM100, and two distinct degradation routes were hypothesized. Ultimately, combining ECOSAR predictions with zebrafish behavioral tests to assess the toxicity changes in degradation processes and the acute and chronic toxic effects on aquatic animals, the inhibition of the locomotive behavior of zebrafish was significantly decreased after 120 min of photocatalytic degradation, suggesting that the BM100 sample can effectively degrade TC and detoxify the aquatic environment.
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CATALYSIS COMMUNICATIONS
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2023
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IF 3.7
Chen Li,Li Sun,Jinan Niu,Arianit A. Reka,Peizhong Feng,Hermenegildo Garcia
Improving the efficiency/cost ratio is the key to the practical application of photocatalysts. Using cheap minerals as carriers is an effective means to improve the efficiency/cost ratio of photocatalysts. Here, kaolinite was used to co-load TiO 2 nanoparticles and Bi containing core-shell spheres forming the composites with excellent photocatalytic performance. The rate constant per unit mass of TiO 2 in the optimal sample reached 18 times that of TiO 2 . Kaolinite plays important roles in promoting photocatalytic activity by improving the dispersion of TiO 2 and the adsorption of O 2 molecules and MO anions, besides the type-II energy band alignment of TiO 2 and Bi x O y .
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ACS Sustainable Chemistry & Engineering
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2022
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IF 9.224
Miao Wang,Shuai Liu,Bo Chen,Fengyu Tian,Chuang Peng
Electrochemical CO2 reduction to formate provides a prospective avenue to produce more valuable products. Compared to pure Bi and Cu, the Bi–Cu (2:1) bimetallic catalyst optimizes the interfacial electronic structure through the electronic interaction between Bi and Cu. The Bi–Cu (2:1) catalyst exhibits a high faradaic efficiency of 94.1% at −1.0 V vs RHE, high faradaic efficiency (>90%) toward formate in a wide potential window (500 mV), and long-term stability of 20 h. The electrocatalytic mechanism is identified by combining in situ FT-IR and DFT calculations, which demonstrates that formate prefers to be formed through the HCOO* pathway. High faradaic efficiency in a wide potential window can be ascribed to stable active sites and the decreased energy barrier in HCOO* and formate. This study further provides inspirations for promoting the electrocatalytic selectivity of bimetallic catalysts through effective interfacial electronic modulation.
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SOLID STATE SCIENCES
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2022
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IF 3.752
Peijie Weng,Qing Cai,Linfeng Zhang,Huadong Wu,Kun Wu,Jia Guo
In this study, the Mo -doped hollow hierarchical Bi/BiOBr microspheres are prepared by the solvothermal method with the Sn 2+ as reductant. The prepared composites show a good degradation effect for ciprofloxacin (CIP) under visible light. Especially, the BSM-22 composite show the best photocatalytic activity, with the apparent rate constant k as high as 0.03014 min −1 , which is 26.9 times that of the pure BiOBr. It is assumed that the introduction of Sn 2+ facilitate the formation of hollow hierarchical microspheres structure of BiOBr microspheres and the appearance of metallic Bi on the surfaces. Therefore, the transfer and separation efficiency of photogenerated charges is increased in the composites. Impressive, benefit from the microtopography of the hollow structure, the specific surface area of the BSM-22 (53.476 m 2 /g) is 21.76 times than that of the BiOBr (2.458 m 2 /g). The doping of Mo reduces the band gap of BiOBr (exactly from 2.61 to 1.96 eV) and broaden the photoabsorption region. Therefore, the photocatalytic activity of the Mo -doped Bi/BiOBr microspheres are heavily improved in dealing with different kinds of antibiotic molecules. More importantly, these results show that the design strategies of heteroatom doping, metal bismuth production, and morphology control of the bismuth oxybromide composite can greatly improve the visible-light catalytic activity.
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JOURNAL OF POWER SOURCES
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2022
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IF 9.794
Yani Liu,Yu Wang,Haoqiang Wang,Shuming Dou,Junwei Wu,Wei Gan,Qunhui Yuan
Aiming to the repetitively large volume change and the inevitably loss of volumetric capacity of bismuth (Bi) based sodium-ion battery (SIB) during cycling, a binder-free Bi anode based on one-step electrochemical co-deposited three-dimensional Bi nanosheets and conductive carbon nanotube networks (Bi NS/CNTs) was developed. Compared with the sole Bi anode achieved via the same strategy, the co-deposition of 3D hierarchical Bi nanosheet/CNTs arrays manifests the strong interfacial adhesion and accommodates the volume change upon sodium alloying/dealloying. Such structural feature endows the Bi NS/CNTs anode a long-term cycling stability (383.72 mAh g −1 at 0.1 A g −1 after 200 cycles, 311.68 mAh g −1 at 1 A g −1 after 1000 cycles) and a good rate performance. A full SIB assembled with Bi NS/CNTs anode and Na 3 (VOPO 4 ) 2 F@rGO cathode shows a high operating voltage (above 4 V) and a high energy density of 221.99 Wh kg −1 , which outperforms many reported Bi-based analogues. This work may open a new opportunity for developing efficient SIB with high energy and good practicability.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2022
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IF 10.319
Qiang Peng,Meng Ma,Si Chen,Yanqin Shi,Huiwen He,Xu Wang
Developing excellent absorption-dominant electromagnetic interference (EMI) shielding composites is an urgent demand for the rapid development of 5 G technology and electronic equipment. Herein, a simple strategy is employed to fabricate carbon nanotubes-polypropylene fibers (CP) /polypropylene-glass fibers felt (PGFF)/Fe 3 O 4 composites with superior EMI shielding effectiveness and low reflection due to the magnetic-conductive bi-gradient structure which is naturally formed by deposition during the vacuum-assisted filtration process. The difference in dimensionality between one-dimensional CNT with outstanding electrical conductivity and zero-dimensional magnetic Fe 3 O 4 nanoparticles is the theoretical basis for the successful construction of the magnetic-conductive bi-gradient structure in a gap-rich PGFF matrix that endows the composites with “absorb-reflect-reabsorb” EMI shielding mechanism. When the electromagnetic waves are incident from the magnetic layer, the EMI shielding effectiveness (SE) reaches 48.9 dB as the weight percentage of the conductive layer increases, more importantly, the reflection coefficients are reduced by more than 0.32 compared with that of another incident pattern. What's more, the resultant composites exhibit an outstanding signal shielding function in the application. This work paves a convenient pathway for designing a magnetic-conductive bi-gradient structure and efficient absorbing EMI shielding composites applied in the next-generated electronic information and communication field.
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CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Haoyi Wang,Ye Zhou,Jinnan Wang,Aimin Li,Philippe François-Xavier Corvini
To remove endocrine disrupting chemicals (EDCs), visible-light response photocatalyst BiOBr/Bi 4 O 5 Br 2 /perylene diimide (PDI) with bi-heterojunction was constructed. Under visible-light irradiation, BiOBr/Bi 4 O 5 Br 2 /PDI could degrade 90% Bisphenol A (BPA) within 75 min, while degrade 100% 17α-ethynyl estradiol (EE2) and 17β-estradiol (E2) within 15 min. Radicals quenching experiment and EPR indicated both •O 2 – and holes were the main substances for EDCs degradation, and the possible degradation pathway of EDCs are proposed based on the LC-MS analysis results. In the composite of BiOBr/Bi 4 O 5 Br 2 /PDI, the matching energy band structure between Bi 4 O 5 Br 2 and BiOBr facilitated the formation of heterojunction for strengthening the space charge separation. Meanwhile, PDI with strong photosensitivity combined with BiOBr/Bi 4 O 5 Br 2 not only enhanced visible-light photocatalytic activity but also broadened the light-harvesting range. Owning to the unique one-dimensional conjugated structure and internal electric field effect, PDI could also promote the photo-carriers transfer and separation. With the bi-heterojunction effect, photo-generated electrons were transferred to BiOBr conduction band while holes were accumulated on PDI valence band. Simultaneously, holes could oxidize water with the production of oxygen following being reduced to •O 2 – by photo-generated electrons. Even under oxygen-poor conditions, the production of •O 2 – can reach 32.7 × 10 -5 mol•g −1 •h −1 , resulting in more than 85% BPA degradation within 75 min.
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Journal of Materials Chemistry C
·
2021
·Vol. 10
·期 1
·337-345
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IF 7.393
Hongrui Jia,Zhigang Liang,Zhen Li,Fei Li,Linghang Wang
Ferroelectric ceramic materials with large and temperature-insensitive strain responses are highly desired for the practical application of actuators in harsh environmental conditions. In this work, novel xBi(Mg1/2Zr1/2)O3–(0.55 − x)PbZrO3–0.45PbTiO3 (xBMZ-PZ-0.45PT) ternary ferroelectric ceramics were successfully fabricated by a solid-state reaction process. The phase structure of xBMZ-PZ-0.45PT ceramics gradually evolves from rhombohedral-tetragonal coexistence phases to rhombohedral phase with an increase in the BMZ content and the diffuse phase transition behavior becomes increasingly evident. The relaxation behavior is strongest for x = 0.35 composition. Pmax and Pr values first gradually increased, and then gradually decreased with increasing BMZ content, while Ec values display an increasing trend. A large strain response of 0.33% at 5 kV mm−1 was obtained in this ternary ferroelectric ceramics with x = 0.35, which can be attributed to the electric field-induced reversible ergodic relaxation phase to the ferroelectric phase transition. The strain was simultaneously temperature-insensitive with a slight decrease from 0.33% at 30 °C to 0.32% at 150 °C. The results indicate that BMZ-PZ-PT ternary ferroelectric ceramics are promising candidate materials for actuator applications in harsh environmental conditions.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Jiafeng Jin,Jinsheng Sun,Kaihe Lv,Xuan Guo,Qilin Hou,Jingping Liu,Jintang Wang,Yingrui Bai,Xianbin Huang
The introduction of oxygen-defects has been a versatile strategy to enhance photocatalysis efficiency. In this work, a 2D/3D Bi/BiO 2-x /Bi 2 WO 6 heterojunction photocatalyst with rich oxygen-defective was in sequence prepared through a facile solvothermal method , which displays favorable photocatalytic activity towards organic contaminants under visible-NIR light irradiation . The enhancement in photocatalytic performance can be attributed to the synergistic effect between oxygen-vacancy-rich heterojunction and the localized surface plasmon resonance induced by metallic Bi. The functional group interaction, surface morphology , crystal structure, element composition , and tuned bandgap were investigated by FT-IR, SEM, Raman shift, ICP-MS, and XPS technique. The spectrum response performance of the photocatalyst was verified by UV–visible DRS analysis. Results of photodegradation experiments toward organic contaminants showed that the prepared photocatalyst can degrade 90% of phenol in 20 mins under visible-NIR light irradiation, both Z-scheme heterojunction and the introduction of Bi metal contribute to the enhancement in the photocatalytic activity. The results of the DFT calculation suggest that the valence band-edge hybridization within BiO 2-x and Bi 2 WO 6 can effectively enhance the photocatalytic performance by increasing the migration efficiencies of electron-hole pairs. Moreover, a possible mechanism was proposed on the results of EIS, ESR and GC–MS tests. This work offers a novel insight for synthesizing efficient visible-NIR light photocatalysis by activating the semiconductors with Bi metal.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Yongtao Xue,Zengyue Chen,Zhansheng Wu,Fei Tian,Bing Yu
Developing cost-effective photocatalysts with efficient electron hole separation efficiency and excellent light absorption performance for the remediation of organic pollutants from wastewater is highly desirable. Herein, a new Z-Scheme Bi/BiVO 4 -CdS heterojunction with leaf-like morphology has been successfully fabricated for the first time and its application as a photocatalyst for the degradation of tetracycline hydrochloride (TCH) has been explored. Compared with BiVO 4 and Bi/BiVO 4 , the as-prepared Bi/BiVO 4 -CdS exhibits improved light absorption capacity and electron-hole separation efficiency, and it has a superior performance of photocatalytic degradation of TCH. The degradation ratio of TCH by Bi/BiVO 4 -CdS based photocatalysis reaches 85.5% within 30 min. The rate constant of TCH degradation for Bi/BiVO 4 -CdS is 1.32 and 1.18 times of the BiVO 4 and Bi/BiVO 4 , respectively. In addition, Bi/BiVO 4 -CdS displays a high stability without obvious decay for its TCH degradation efficiency (<5%) during four recycles. The ESR characterization and reactive species trapping experiments indicates that the generated h + , •O 2 – , and •OH from Bi/BiVO 4 -CdS based photocatalysis are responsible for TCH degradation. Since several intermediates are identified by HPLC-MS, the pathways for Bi/BiVO 4 -CdS based photocatalytic degradation of TCH are proposed.
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Nanoscale
·
2020
·Vol. 12
·期 37
·19293-19307
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IF 6.895
Fangmei Zhang,Shikai Liu,Na Zhang,Ye Kuang,Wenting Li,Shili Gai,Fei He,Arif Gulzar,Piaoping Yang
Hypoxia in tumor cells is regarded as the most crucial cause of clinical drug resistance and radio-resistance; thus, relieving hypoxia of tumor cells is the key to enhancing the efficacy of anticancer therapy. As a gas signal molecule of vasodilatation factors, nitric oxide (NO) can relieve the hypoxia status of tumor cells, thereby, enhancing the sensitivity of tumor cells to radiotherapy. However, considering complications of vascular activity, the level of NO required for radiotherapy sensitization cannot be obtained in vivo. In view of this, we design and fabricate a multifunctional bismuth-based nanotheranostic agent, which is functionalized with S-nitrosothiol and termed Bi–SNO NPs. X-rays break down the S–N bond and simultaneously trigger large amount of NO-releasing (over 60 μM). Moreover, the as-prepared Bi–SNO NPs not only possess the capability of absorbing and converting 808 nm NIR photons into heat for photothermal therapy, but also have the ability to increase X-ray absorption and CT imaging sensitivity. In addition, the collaborative radio-, photothermal-, and gas-therapy of Bi–SNO in vivo was further investigated and remarkable synergistic tumor inhibition was realized. Finally, no obvious toxicity of Bi–SNO NPs was observed in the treated mice within 14 days. Therefore, the Bi–SNO developed in this work is an effective nano-agent for cancer theranostics with well-controlled morphology and uniform size (36 nm), which could serve as a versatile CT imaging-guided combined radio-, photothermal- and gas-therapy nanocomposite with negligible side effects.
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