APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Jing Li,Dandan Wang,Siyuan Zhao,Rui Ma,Jifeng Guo,Zhuoya Li,Dong Wang,Yue Xuan,Liping Wang
Novel oxygen vacancies-enriched AgI/Cu-BiVO 4 (ACBV) S-scheme heterojunction catalysts were constructed to boost photocatalytic organics degradation and M. aeruginosa inactivation with peroxymonosulfate (PMS) assistance. Specific interfacial charge transfer and abundant active centers were guided by introducing Cu doping and AgI coupling into BiVO 4 , with the catalytic activity and mechanism systematically investigated. The optimal 0.25-ACBV heterojunction exhibited 97.6% tetracycline (TC) degradation under PMS-assisted visible light and achieved effective inactivation of M. aeruginosa within 20 min (78.8%). The S-scheme heterostructure from Cu-BiVO 4 to AgI and synergistic effects endowed the system with high-energy carrier transfer kinetics and strong oxygen reduction capability. Meanwhile, the redox cycling of Cu 2+ /Cu + and surface oxygen defects served as electron acceptors to accelerate interfacial charge separation and as adsorption activation sites for PMS, promoting efficient mass transfer in the non-homogeneous system. This study inspires the design of high-performance S-scheme photocatalytic activators and expands their potential applications in environmental remediation.
研究领域:
环境科学
·
光催化材料
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2018
·Vol. 30
·期 7
·075601
·
IF 3.404
Liang Shi,Chonglei Xu,Daixun Jiang,Xun Sun,Xiaopeng Wang,Qicong Wang,Yelong Zhang,Xiaofei Qu,Fanglin Du
Heterostructured photocatalysts play a significant role in the removal of contaminants by decreasing the recombination of the photo-induced charges. Herein, we presented novel TiO2/C/BiVO4 ternary hybrids employing a 2D layered Ti3C2 MXene precursor, overcoming the lattice mismatching of TiO2/BiVO4 binary heterostructures simultaneously. Raman and XPS analyses proved the strong coupling effects of TiO2, carbon and BiVO4 components, and the heterostructures were identified from high-resolution transmission electron microscopy results. Moreover, the ternary TiO2/C/BiVO4 composites exhibit excellent photocatalytic performance of Rhodamine B degradation, which is about four times higher than pure BiVO4 and twice that of binary TiO2/BiVO4 heterostructures, reaching a reaction constant of 13.7 × 10−3 min−1 under visible-light irradiation (λ > 420 nm). In addition, for the possible mechanism for dye elimination it was proposed that RhB molecule be directly oxidized by photo-induced holes (h+) on the BiVO4 components and superoxide radical ({{{\rm{O}}}_{2}}^{\cdot -}) generated from conduction band electrons of the heterostructures. This work will provide possibilities for developing visible-light responsive nanomaterials for efficient solar utilization.
研究领域:
材料科学
·
环境科学
·
光催化技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 1
·671-682
·
IF 2.993
Chen Yaqi,Yang Minji,Du Jinyan,Ke Gaili,Zhong Xiaohui,Zhou Yong,Dong Faqin,Bian Liang,He Huichao
Poor charge transfer and separation rate are the major bottlenecks for the activity and stability of BiVO 4 photoanode. Here, we introduced oxygen vacancies into MoO 3 /BiVO 4 heterojunction film by post-annealing the film in argon-saturated environment for improving its photoelectrochemical (PEC) water oxidation activity and stability. In comparison with the normal MoO 3 /BiVO 4 film, the MoO 3 /BiVO 4 film with oxygen vacancies is of better PEC water oxidation performance. Specifically, a higher photocurrent density of 4.1 mA/cm 2 in 0.1 M Na 2 SO 4 at 1.1 V versus SCE was achieved on the MoO 3 /BiVO 4 film with oxygen vacancies, which is about 200% improved over the normal MoO 3 /BiVO 4 film (1.83 mA cm −2 , at 1.1 V versus SCE). In addition, the MoO 3 /BiVO 4 film with oxygen vacancies shows more stable activity and faster kinetics for water oxidation, without significant activity loss for 5 h reaction at 1.23 V versus RHE. The enhanced performance on such a MoO 3 /BiVO 4 film photoanode can be attributed to that the oxygen vacancies accelerate the charge transfer and separation rate between film/electrolyte interface, and thus improve the water oxidation activity and restrain the anodic photocorrosion simultaneously.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2013
·
IF 4.814
Zhiqiao He,Yuanqiao Shi,Chao Gao,Lina Wen,Jianmeng Chen,Shuang Song
A novel visible-light-active BiOCl/BiVO4 photocatalyst with a p–n heterojunction structure was prepared using a hydrothermal method. The photocatalytic activity of the heterojunction was investigated by monitoring the change in methyl orange (MO) concentration under visible-light irradiation. The results reveal that the composite exhibited markedly improved efficiency for MO photodegradation in comparison with pure BiVO4, BiOCl, and Degussa P25. This is ascribed to the B-type heterojunction structure with a strong oxidative ability and efficient charge separation and transfer across the BiOCl/BiVO4 p–n junction. The highest activity was obtained in the BiOCl/BiVO4 heterojunction using a composite of 13 mol % BiOCl and 87 mol % BiVO4. The removal of MO was mainly initiated by valence-band holes, but dissolved oxygen also played a crucial role in consuming the conduction-band electrons. This was verified by the effects of scavengers and N2 purging.
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
Catalysts
·
2020
·Vol. 10
·期 5
·556
·
IF 3.52
Yuncheng Cao,Zheng Xing,Bobo Wang,Wei Tang,Rong Wu,Jiangyu Li,Ming Ma
Single-phase photoanodes often suffer inferior charge transport, which can be mitigated by constructing efficient heterojunctions. Thus, we have fabricated a fluorine-doped tin oxide (FTO)/WO3/BiVO4heterojunction using hydrothermal and spin-coating methods. Surface engineering was exploited to further accelerate the reaction kinetics, which was achieved via post-modification with NaOH solution. This treatment alters the surface chemical state of the BiVO4nanoparticles, leading to enhanced charge transport and surface water oxidation processes. As a result, the optimized sample can produce a photocurrent more than two times that of WO3. The simple post-treatment provides a viable and cost-effective strategy for promoting the photoelectric properties of photoanodes.Keywords:FTO/WO3/BiVO4heterojunction;photoelectrochemical;post-modification;surface engineering;solar water-splitting
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Nihad Ibrahim Mohammed Abdallah,Yan Li,Xiao-Tian Wang,Xue Li,Cheng-Wei Wang
Configuring new nanostructured photocatalyst with high efficient photocatalystic capabilities is meaningfully for environmental pollution control. Herein, a p-n heterojunction nanostructured photocatalyst of Ni(OH) 2 /BiVO 4 was well designed and successfully fabricated via a facile solvothermal method, in which Ni(OH) 2 is a wide band-gap semiconductor. Being applied for photo-degradation of anion organic dye, it is found such Ni(OH) 2 /BiVO 4 heterostructures can not only increase the specific surface area and enhance the light response, but also effectively facilitate the photo-generated charge separation and transfer. As a result, 0.5-Ni(OH) 2 /BiVO 4 can possess a photocatalytic capability of 96% and a reaction rate constant 1.9572 h −1 within 90 min irradiation, being 6 and 18 times higher than that of pure BiVO 4 (16%, 0.1098 h −1 ). This study presents a new means to design a kind of high efficient wide band-gap semiconductor constructed BiVO 4 -based photocatalysts.
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
CHEMICAL ENGINEERING SCIENCE
·
2019
·
IF 3.372
Fang Li,Dennis Y.C. Leung
A heterojunction structure of BiVO 4 coupled with a narrow bandgap photocatalyst Bi 2 S 3 was fabricated forming a composite material with strong capacity in visible light absorption and enhancement in the separation rate of photogenerated charge carriers owing to their suitable band structures. As a result, efficiency of hydrogen production through photoelectrocatalysis is highly enhanced. The morphology and composition of as-prepared sample electrodes are measured through X-Ray Diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HR-TEM) and X-ray photoelectron spectroscopy (XPS). The performance of the hybrid nanostructure Bi 2 S 3 /BiVO 4 photoelectrode was found to be related to the growing process of Bi 2 S 3 nanowire during the hydrothermal preparation process. The composited Bi 2 S 3 /BiVO 4 photoanode achieved a photoconversion efficiency of 2.9% which is nearly 3-fold that of the bare BiVO 4 electrode under visible light irradiation, while the hydrogen production was greatly enhanced by nearly 5-fold in the photoelectrocatalytic hydrogen production reaction.
研究领域:
材料科学
·
能源科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2022
·
IF 5.6
Yi Zhou,Jiaxin Li,Jin Zhang,Yongbo Chen,Tiantian Yao,Anna Chen,Minghui Xiang,Zhiyue Chen,Zhibin Wu
Dye sensitization is a pivotal method for the improvement of light utilization and electron transfer. Herein, a rhodamine B (RhB)-sensitized type Ⅱ DUT-5/BiVO 4 heterojunction was successfully synthesized. The results showed that the RhB sensitization process of DUT-5/BiVO 4 heterojunction merely affected the DUT-5 instead of BiVO 4 . SEM results showed that the regular DUT-5 nanoparticles were homogeneously dispersed on the surface of leaf-shaped BiVO 4 nanosheets. The as-fabricated samples were employed to degrade RhB and tetracycline (TC) under 300 W Xe lamp (λ ≧ 420 nm) irradiation. The RhB sensitized heterojunction showed considerably strengthened photocatalytic performance. The photodegradation efficiency of RhB sensitized BD-15% can achieve 82% for RhB after 60 min visible-light irradiation, and 71% for TC after 30 min visible-light irradiation. The dye-sensitized composites exhibit excellent photocatalytic activity ascribed to its boosted photoinduced electron transport, broadened visible-light response range and larger specific surface area. Moreover, a possible mechanism for pollutants photodegradation over RhB sensitized DUT-5/BiVO 4 was proposed.
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
ENVIRONMENTAL RESEARCH
·
2021
·
IF 6.498
Gongduan Fan,Shangwu Yang,Banghao Du,Jing Luo,Xin Lin,Xia Li
A novel FeVO 4 /BiVO 4 heterojunction photocatalyst was synthesized by hydrothermal method. The FeVO 4 /BiVO 4 nanostructures were characterized by XRD, SEM, XPS, UV–vis, and photoluminescence spectroscopy. The effects of catalyst dosage, contaminant concentration, initial hydrogen peroxide (H 2 O 2 ) concentration, and pH value on the degradation of levofloxacin were investigated and several repeated experiments were conducted to evaluate the stability and reproducibility. The optimized process parameters were used for mineralization experiments. Reactive oxygen species , degradation intermediates, and possible catalytic mechanisms were also investigated. The results showed that the sonophotocatalytic performance of the FeVO 4 /BiVO 4 heterojunction catalyst was better than that of sonocatalysis and photocatalysis . In addition, the Type II heterojunction formed by the material still had good stability in the degradation of levofloxacin after 5 cycles. The possible degradation pathway and mechanism of levofloxacin by sonophotocatalysis were put forward. This work develops new sono-photo hybrid process for potential application in the field of wastewater treatment .
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2023
·
IF 8.3
Xiaoju Wang,Shanshan Hu,Haitao Mao,Xueyu Wei,Saraschandra Naraginti
In the recent past, the development of efficient materials for degradation and detoxification of antibiotics has gained more attention in wastewater treatment process . As a visible light active material AgVO 3 has attracted much concern in environmental remediation. To improve its efficiency and stability, a novel heterojunction was prepared by combining AgVO 3 with rGO and BiVO 4 through a hydrothermal method. The prepared AgVO 3 /rGO/BiVO 4 composite was further utilized for effective detoxification of Norfloxacin (NFC) antibiotic. The morphological analysis revealed the clear rod shaped AgVO 3 and leaf like BiVO 4 that are evenly distributed on reduced graphene oxide (rGO) layers. The visible light absorbance and the catalytic activity of AgVO 3 /rGO/BiVO 4 was dramatically improved compared to pure AgVO 3 and BiVO 4 . From the results it showed that the degradation efficiency of AgVO 3 /rGO/BiVO 4 (∼96.1%, k = 0.01782 min −1 ) was 2.5 times higher than pure AgVO 3 and 3.4 times higher than the pure BiVO 4 respectively towards NFC after 90 min. The higher efficiency could be attributed to the heterojunction formation and faster charge separation. The radical trapping experiments results indicated that the •OH, and O 2 •− are the main species responsible for degradation. The degradation products of NFC were analysed through ESI-LC/MS and pathway was proposed. Furthermore, the toxicity assessment of pure NFC and its degradation products was studied using E. coli as the model bacteria through colony forming unit assay and the results indicated the efficient detoxification was attained during the degradation process. Thus, our study provides new insight into detoxification of antibiotics using AgVO 3 based composites
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
CHEMOSPHERE
·
2025
·
IF 8.1
Qianying Zong,Xiaofei Niu,Xin Cheng,Yifan Liu,Cong Liu,Tingyue Shi,Jiapeng Liu,Xiaohong Yang,Wentao Wang,Zikuan Guo,Fengjuan Xiao
Nanoscale FeWO 4 /BiVO 4 heterojunctions were directly grown on the graphite fiber felt (GF) with good conductivity to construct a FeWO 4 /BiVO 4 @GF solar photo-Fenton like wastewater treatment system. The removal effect of COD from phenolic wastewater and the mechanism of synergistic improvement of wastewater treatment efficiency by this system were investigated. The FeWO 4 /BiVO 4 heterojunction prepared by hydrothermal method exhibited higher photoelectric conversion efficiency and solar light utilization rate, thus endowing FeWO 4 /BiVO 4 with excellent solar-Fenton like reaction activity.The photo-Fenton activity can be maintained well even within the pH range of 2–8. Loading FeWO 4 /BiVO 4 nano-heterojunction on GF helped to increase the contact area between Fenton reagents and wastewater, facilitate the electron transfer on the FeWO 4 /BiVO 4 heterojunction and enable the recovery and reuse of the Fenton reagents.Under solar light radiation, the COD removal efficiency of FeWO 4 /BiVO 4 @GF/H 2 O 2 system in phenolic wastewater was more than 92%. Even after five cycles, the system still exhibited excellent operation stability. FeWO 4 /BiVO 4 @GF promoted the conversion and cycling of Fe(III)/Fe(II) by accelerating the separation and transport of photogenerated electrons/holes and increasing the concentration of active species, thereby stimulating excellent solar photo-Fenton like activity.The results are significance to the development of green and efficient photo-Fenton process for advanced treatment of industrial wastewater.
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 Semiconductors
·
2016
·Vol. 37
·期 8
·083004
·
IF 0
Ying Wu,Jing Wang,Yunfang Huang,Yuelin Wei,Zhixian Sun,Xuanqing Zheng,Chengkun Zhang,Ningling Zhou,Leqing Fan,Jihuai Wu
Novel, three-dimensional, flower-like Bi2O3/BiVO4 heterojunction photocatalysts have been prepared by the combination of homogeneous precipitation and two-step solvothermal method followed by thermal solution of NaOH etching process. The as-obtained samples were fully characterized by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis, Brunauer-Emmett-Teller surface area, and UV—vis diffuse-reflectance spectroscopy in detail. The crystallinity, microstructure, specific surface area, optical property and photocatalytic activity of samples greatly changed depending on solvothermal reaction time. The photocatalytic activities of samples were evaluated on the degradation of methyl orange (MO) under visible-light irradiation. The Bi2O3/BiVO4 exhibited much higher photocatalytic activities than pure BiVO4 and conventional TiO2 (P25). The result revealed that the three-dimensional heterojunction played a critical role in the separation of the electron and hole pairs and enhancement of the interfacial charge transfer efficiency, which was responsible for the enhanced photocatalytic activity.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
危险品化学品经营许可证（带存储）