INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Fei Li,Bo Dong,Shenglei Feng
Photoelectrochemical (PEC) seawater splitting can relive the shortage of purified water feedstocks . However, the corrosion from seawater on the photoelectrode becomes an uncertain influence factor for PEC performance. Developing an efficient and stable photoelectrode is a challenge. Herein, we present a Bi–BiOI shell-core microspheres modified TiO 2 nanotube arrays (TNA) photoanode prepared via solvothermal method , affording superior PEC hydrogen evolution activity in simulated seawater under AM1.5G light, which is 3.8 and 7.6 times than those of BiOI/TNA and TNA, respectively. Solar-to-hydrogen conversion efficiency of Bi–BiOI/TNA reaches to 2.21% with Faradaic efficiency up to 85.7%. Based on the optical and PEC measurements, it is verified that surface plasmon resonance effect of metallic Bi promotes transfer and separation of photogenerated charge and enhances visible-light absorption, thus benefiting higher PEC performance. Especially, Bi shell efficiently hinders the corrosion of BiOI by seawater. Our work provides a novel paradigm of photoanode for efficient and stable PEC seawater splitting.
研究领域:
材料科学
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能源科学
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光催化
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Hongji Li,Dandan Wang,Chun Miao,Fengwu xia,Yubo Wang,Yutong Wang,Chunbo Liu,Guangbo Che
Photo-degradation of pollutant and photo-reduction of CO 2 are efficient ways to address challenges of water pollution , the greenhouse effect and energy crisis, respectively. In our work, via fastening two-dimensional (2D) BiOI nanoplates on 2D g-C 3 N 4 nanosheets , a BiOI/g-C 3 N 4 (BI/CN) S-scheme photocatalyst with closely stacked structure were prepared though a self-assembly process. The prepared BI/CN S-scheme heterojunction could improve the transfer and separation efficiency of photo-generated electron-hole pairs by facilitating the electrons transfer from BiOI to g-C 3 N 4 . Under visible light exposure, the photo-degradation efficiencies of tetracycline hydrochloride (TC) and p-chlorophenol (4-PC) by BI/CN-50% reached nearly 100% and 46%, respectively, which were more excellent in comparison with other samples. And BI/CN-50% sample exhibited the best CO production (12.45 μmol∙g −1 ) with visible-light irradiation of 4 h. This value was approximately 4.37 and 5.41 times higher than that of BI (2.85 μmol∙g −1 ) and CN materials (2.30 μmol∙g −1 ), respectively. Moreover, the excellent photocatalytic performance had no visible decay during five cycles. Meanwhile, an S-scheme charge transfer process was confirmed by species trapping experiments and electron spin-trap analysis. This study offers new insights into the activity, kinetics, and mechanism over BiOI-based materials for photocatalysis technology .
研究领域:
环境科学
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材料科学
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光催化技术
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产品关联
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Fei Chen,Ying Gao,Qingfei Hao,Xiangtao Chen,Xudong Sun,Na Li
Aqueous zinc-ion batteries emerge as a promising energy storage system with merits of high security, abundance, and being environmentally benign. But the low operating voltages of aqueous electrolytes restrict their energy densities. Previous reports have mostly focused on modifying the electrolytes to enlarge the operating voltages of aqueous zinc-ion batteries. However, either extra-expensive salts or potential safety hazards of organic additives are considered to be adverse for practical large-scale applications. Here, a proof-of-concept to enlarge the operating voltage of an aqueous zinc-ion battery by incorporating a well-designed semiconductor photocathode is proposed, which produces a photovoltage (Vph) across the semiconductor/liquid junction (SCLJ) interface to elevate the output voltage of zinc-ion battery under irradiation. The operating voltage of an aqueous zinc-ion battery can be markedly raised from 1.78 (thermodynamic limit) to 2.4 V when a BiOI nanoflake array photocathode with good surface modification is introduced, achieving a round-trip efficiency of 114.3% and a 34.8% increase of energy density compared to the theoretical value. The successive ionic layer adsorption and reaction modified surface effectively passivates surface trap defects of the BiOI photocathode and thus enlarges its Vph from 60 to 240 mV under irradiation. This study provides a design to enlarge the output voltages of aqueous zinc-ion batteries and other energy storage systems, providing insight into widening the voltage window, which is that the operating voltages are determined by photocathode under irradiation and not restricted by the electrochemical stability window of dilute aqueous electrolytes.
研究领域:
能源材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Xueding Jiang,Shufeng Lai,Weicheng Xu,Jianzhang Fang,Xin Chen,Jingzi Beiyuan,Xiwu Zhou,Kaichun Lin,Junxing Liu,Gongcou Guan
In this work, a novel visible-light-driven ternary BiOI/g-C 3 N 4 /CeO 2 photocatalyst was successfully synthesized by calcination and hydrothermal treatment . The obtained ternary BiOI/g-C 3 N 4 /CeO 2 had high photocatalytic performance for the degradation of tetracycline (TC) under visible-light irradiation. The samples were characterized by X-ray diffraction (XRD), UV–Vis diffuse reflectance (DRS) spectroscopy, and Fourier transform infrared spectroscopy (FT-IR), etc. The results indicated that 3 wt% BiOI/g-C 3 N 4 /CeO 2 catalyst possessed the best photocatalytic activity (91.6%) among all the as-prepared samples. The enhanced photocatalytic activity could be attributed to a double charge transfer process between g-C 3 N 4 and other catalysts in the ternary heterojunction , so that the separation of photogenerated electron–hole pairs was more effective. The as-prepared ternary sample also exhibited high stability after six cycles of the photodegradation reaction. Additionally, the active species (h + ) were considered as the main reactive species during the degradation of TC. Based on the research results, a possible photocatalytic reaction mechanism for the BiOI/g-C 3 N 4 /CeO 2 sample was proposed and discussed in detail.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
RSC Advances
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2014
·Vol. 4
·期 59
·31393-31399
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IF 3.708
Jingyi Liu,Haiping Li,Na Du,Shue Song,Wanguo Hou
BiOI hierarchical flower-like microspheres were hydrothermally prepared, using tetrabutylammonium iodide as an iodine source and template. Many BiOI hierarchical structures have been synthesized using KI, NaI, HI or ionic liquids as the iodine source, but the use of alkyl ammonium iodide as the iodine source was not reported in the literature. The so-obtained BiOI samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, nitrogen sorption measurements, and ultraviolet-visible diffuse reflectance spectroscopy. The effects of hydrothermal temperature and time on the BiOI crystal structure and morphology were investigated. The BiOI microspheres were composed of BiOI nanosheets. The photocatalytic performance of the BiOI samples was determined from the degradation of Rhodamine B, under visible light irradiation. BiOI microspheres prepared at 160 °C over 30 h exhibited excellent photodegradation efficiency, which was more than five and seven times higher than those of BiOI nanoplates and N-doped TiO2, respectively. The high photocatalytic performance was attributed to the high specific surface area and low nanosheet thickness. A morphologic factor was proposed to represent the ratio of specific surface area to nanosheet thickness, and correlated to the photodegradation efficiency of the BiOI samples. The photocatalytic efficiency increased with increasing morphologic factor. The BiOI photocatalyst exhibited excellent stability and reusability, and has potential in environment remediation.
研究领域:
材料科学
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化学
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环境科学
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纳米技术
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产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
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2017
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IF 7.78
Xiaomin Yang,Xin Li,Lizhi Zhang,Jingming Gong
Triphenyl Phosphate (TPhP), as a typical model of organophosphorus flame retardants (OPFRs), has been regarded as emerging environmental contaminants of health concern. In this study, a rapid and highly sensitive visible-light-response PEC sensor has been developed for the detection of Triphenyl Phosphate (TPhP) using electrospun template directed molecularly imprinted nanofibers modified BiOI nanoflake arrays (BiOINFs) as a photoactive electrode. The molecularly imprinted electrospun nanofibers (labeled as MI-ESNFs) were carefully characterized by scanning electron microscopy (SEM), UV spectra , FTIR spectra measurements and various electrochemical techniques . Under the optimized experimental conditions, the photoelectrochemical response was linearly proportional to the logarithm value of TPhP concentrations in the range of 0.01 ng mL −1 to 500 ng mL −1 . Meanwhile, the sensor exhibited high selectivity and stability.
研究领域:
环境科学
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分析化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Haoruo Xu,Chenxi Huang,Weili Yu,Ningjie Fang,Yinghao Chu,Jinhui Li
The combined pollution toxicity of hexavalent chromium heavy metal (Cr(VI)) and antibiotics (such as ofloxacin, OFL) is much higher than that of a single pollutant, posing a serious challenge to the ecological environment. Photocatalytic technology can achieve the removal of both single pollutants and composite pollutants. It is urgent to develop catalysts with high carrier separation efficiency and photocatalytic degradation performance. In this work, we successfully prepared m-PDI/BiOI heterojunction catalysts (mPB-3) with tight contact interfaces using the continuous ion layer adsorption and reaction method, and applied them to the synergistic removal of OFL and Cr(VI). The results showed that mPB-3 exhibited a bidirectional enhancement effect. The degradation rate of OFL reached more than 99.5 % within 40 min, the corresponding reduction efficiency of Cr(Ⅵ) reached 63.7 % at pH = 9. Furthermore, the influence of different environmental factors on the degradation process have also been clarified, indicating that mPB-3 has good stability and adaptability. The system characterization results confirmed that a S-scheme heterojunction has been formed. This can accelerate the rapid migration of electrons from m-PDI to BiOI, achieving efficient charge separation, and ultimately enhancing the photocatalytic activity. Finally, the degradation intermediate products and degradation mechanism were analyzed. This study provides a feasible solution for the design of efficient photocatalytic materials and their application in the combined pollution treatment of OFL and Cr(VI). Environmental implication Cr(VI) and OFL coexisting in water bodies pose significant ecological risks due to their enhanced combined toxicity. Traditional treatment techniques often struggle to effectively address such complex pollution systems. This study demonstrates that the m-PDI/BiOI heterojunction photocatalyst can efficiently synergistically remove both contaminants under environmentally relevant conditions (e.g., pH = 9), providing a practical strategy to mitigate composite pollution challenges. The S-scheme charge separation mechanism offers insights for designing advanced catalysts to tackle emerging multi-pollutant threats in aquatic ecosystems, supporting sustainable water treatment solutions.
研究领域:
环境科学
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催化
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材料科学
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水处理技术
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污染控制
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 15
·3533
·
IF 3.2
Juntao Xie,Zihao Zhang,Zhiheng Yu,Bingxin Sun,Yingxin Yang,Guoyong Wang,Cijun Shuai
Piezocatalytic therapy (PCT) is a promising strategy for combating implant-associated infections due to its high tissue penetration depth and non-invasive nature. However, its catalytic efficiency remains limited by inefficient electron–hole separation. In this work, an ultrasound-responsive heterojunction (BiOI/Ti3C2) was fabricated through in situ growth of bismuth iodide oxide on titanium carbide nanosheets. Subsequently, we integrated BiOI/Ti3C2into poly(e-caprolactone) (PCL) scaffolds using selective laser sintering. The synergistic effect between BiOI and Ti3C2significantly facilitated the redistribution of piezo-induced charges under ultrasound irradiation, effectively suppressing electron–hole recombination. Furthermore, abundant oxygen vacancies in BiOI/Ti3C2provide more active sites for piezocatalytic reactions. Therefore, it enables ultrahigh reactive oxygen species (ROS) yields under ultrasound irradiation, achieving eradication rates of 98.87% forEscherichia coli(E. coli) and 98.51% forStaphylococcus aureus(S. aureus) within 10 minutes while maintaining cytocompatibility for potential tissue integration. This study provides a novel strategy for the utilization of ultrasound-responsive heterojunctions in efficient PCT therapy and bone regeneration.
研究领域:
材料科学
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生物医学工程
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纳米技术
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抗菌治疗
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组织工程
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压电催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
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2022
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IF 8.943
Yixiao Wu,Xuesong Zhao,Yihao Li,Yu Ling,Yongqing Zhang,Xiaoqian Zhang,Shaobin Huang
The narrow light-response range and high electron/hole recombination rate greatly restrict the widespread use of photocatalytic technology . The integration of exposing dominant facet of semiconductor and Z-scheme heterostructures designing is expected to break those barriers. Herein，In this work, hydrothermal and ultrasonic stirring methods were used to selectively exposed the (001) and (110) facet of BiOI to construct the BiOI/CdS heterostructures. The obtained BiOI(001)/CdS material shown the maximum degradation for tetracycline-based antibiotics (Oxytetracycline, Tetracycline and Doxycycline), and excellent reduction of hexavalent chromium. Combining the electron spin resonance and scavenger experiments, the superior photocatalytic capacity was attributed to the generation of superoxide and hydroxyl radicals . DFT calculation results shown BiOI(001)/CdS performed high binding energy and adsorption energy for hexavalent chromium, and the different work function between BiOI(001) and CdS confirmed the building of internal electric field, thereby increased the charge separation. Finally, the Gaussian 09 and HPLC-MS program investigated the attack sites of free radicals and degradation pathways in the degradation of antibiotics. This study not only provides a potential photocatalyst, also gives an in-depth understanding of the photocatalytic properties of heterojunctions constructed by different exposed crystal facets.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Rui Zhang,Lingqiao Hu,Zixi Li,Jingjing Hao
The special layered structure and narrow band gap of BiOI semiconductors lead to a high recombination rate of photogenerated electrons and holes. Therefore, it is compounded with the porous structure of the metal–organic backbone NH 2 -MIL-101(Fe) to form heterojunctions and provide more active sites. In this paper, NH 2 -MIL-101(Fe)/BiOI composites were successfully prepared by solvothermal method, which has a high specific surface area and adjustable pore size, which is conducive to the effective separation and transport of photogenerated electrons and holes, thereby improving the photocatalytic efficiency. The results of XRD, SEM, XPS and other characterization experiments show that NH 2 -MIL-101(Fe)/BiOI composites have been successfully prepared. Secondly, ultraviolet diffuse reflectance spectroscopy (UV–vis DRS) was used to test the light absorption performance of the composites, which confirmed that the materials had a larger visible light range. Through PL, EIS confirmed that the efficiency of photogenerated electron and hole separation was further improved. In addition, the M–S curves of NH 2 -MIL-101(Fe) and BiOI were tested to calculate the valence and conduction band values of the material. Combined with the results of free radical trapping experiments, O 2 − and h + play a major role in the degradation of tetracyclines and can be degraded into CO 2 and H 2 O. The Z-type electron transfer mechanism of the composites is deduced, which can improve the separation rate of electrons and holes. In addition, the cyclic test verified that the composite material has good stability. When the tetracycline concentration was 30 mg/L, the degradation rate of the 10 % NH 2 -MIL-101(Fe)/BiOI composite reached 93.3 %. Its materials also have certain potential application value in environmental treatment, energy conversion and other fields, especially for the treatment of pollutants in water bodies.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Mengjiao Sheng,Juanqin Xue,Guangdong Wu,Yujie Liu,Qiang Bi
Effective use of near-infrared (NIR) light for photocatalysis in the solar full-spectrum remains a major challenge. Herein, LuF 3 : Yb 3+ /Tm 3+ @Lu 6 O 5 F 8 : Yb 3+ /Tm 3+ (LYT@LOYT), which could convert NIR light into UV–visible light, was combined with BiOI to form a novel core-shell structured LuF 3 : Yb 3+ /Tm 3+ @Lu 6 O 5 F 8 : Yb 3+ /Tm 3+ @BiOI (LYT@LOYT@BiOI) upconversion photocatalyst. LOYT shell layer was grown in situ on LYT by high-temperature calcination in air, resulting in a 2.36-fold enhancement of blue light emission from the upconversion luminescent core. The tight core-shell wrapping formed by the solvothermal method achieved an efficient Förster resonance energy transfer (FRET) between LYT@LOYT and BiOI. Meanwhile, the formation of heterogeneous structure also accelerated the separation and transfer of photogenerated electron-hole pairs. As a result, under NIR and Vis-NIR irradiation, the degradation rates of LYT@LOYT(20)@BiOI for bisphenol A (BPA) were 1.24 and 1.11 times of LYT(20)@BiOI, and 1.57 and 1.30 times of BiOI, respectively. The enhanced photocatalytic activity was attributed to the expanded photoresponse range, enhanced upconversion emission, efficient energy transfer process, and excellent electron-hole pairs separation transfer efficiency. h + and ⋅O 2 - were shown to be active species in the degradation process. This work provides a useful reference for the rational design of solar full-spectrum responsive photocatalysts which can efficiently utilize NIR light.
研究领域:
材料科学
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环境科学
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光催化
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Yundong Zeng,Yunlan Xu,Dengjie Zhong,Jiaxin Mou,Haoyang Yao,Nianbing Zhong
The development of photocatalytic fuel cell (PFC) with visible-light response is usually limited by the low efficiency of electron-hole separation in photoanode . In this work, 20%-PTh/Ag 3 PO 4 /BiOI/Ti photoanode was prepared for the first time to construct a PFC with Cu 2 O/Cu cathode to degrade rhodamine B. With visible-light stimulation, the rhodamine B degradation rate, maximum photocurrent density and maximum power density of the PFC were respectively 96.33% (2 h), 0.39 mA cm −2 and 82.20 μW cm −2 . The main active species in the PFC were proved by quenching experiments to be h + , ∙OH and ∙O − 2 . The satisfactory performance of the PFC was due to that a double Z-scheme heterojunction was formed in the photocatalyst of 20%-PTh/Ag 3 PO 4 /BiOI/Ti photoanode, which made the photogenerated electrons of Ag 3 PO 4 and BiOI directly combine with the photogenerated holes of PTh , so that the photogenerated holes of Ag 3 PO 4 and BiOI and the photogenerated electrons of PTh directly or indirectly participated in the degradation reaction of RhB. In this way, the separation efficiency of electron-hole pairs in the photoanode was improved, and the performance of the PFC was significantly enhanced.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）