Small
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2025
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IF 12.1
Jiajun Wan,Qian Zhang,Xu Jia,Pengfei Zhang,Yuanze Yu,Jiyang Tian,Jie Liu
Aqueous Zn-ion batteries (AZIBs) recently have attracted broad attention. To achieve high energy density of AZIBs, constructing high-loading cathodes is the prerequisite. However, the cycling stability of high-loading cathodes still faces great challenges. Herein, a comprehensive strategy is proposed to improve the structural stability of the cathode material and mechanical stability of the high-loading cathode. The BiOBr@BiOIO 3 heterostructure are successfully constructed via sharing the interfacial oxygen atoms, in which the interfacial effect can effectively enhance the reaction dynamics and structural stability. Meanwhile, a biomimetic binder is skillfully designed via in situ dual cross-linking between guar gum and cation ions to achieve the application of water-based and sustainable polymer binder in AZIBs. Density functional theory calculations demonstrate the guar gum possesses strong affinity toward BiOBr@BiOIO 3 to firmly adhere the active materials. Quantitative nanomechanic technology visually demonstrates the robust mechanical properties of the as-obtained BiOBr@BiOIO 3 cathode. As a result, when the active material loading increases to as high as 100.71 mg cm −2 , an ultrahigh areal capacity of 20.02 mAh cm −2 can be achieved. Specially, a quasi-Ah-level (0.244 Ah) pouch-type cell with a loading of 1.17 g can be constructed, showing the practical application potential.
研究领域:
材料科学
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电化学
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储能技术
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PubMed
高影响因子
Journal of Science-Advanced Materials and Devices
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2023
·
IF 8
Shuai Fu,Yanqiang Du,Junhong Bie,Zhiquan Huang,Hai Hu,Qiang Huang,Huijie Zhu,Wei Yuan,Leicheng Li,Bo Liu
Z-scheme Ag 2 WO 4 /BiOBr heterojunction with rich oxygen vacancies was successfully synthesized by the simplest hydrothermal method, which was systematically characterized in the structural, optical and electronic properties. The photocatalytic applications of Z-scheme Ag 2 WO 4 /BiOBr heterostructure with different weight percentages of Ag 2 WO 4 were studied. The optimized Ag 2 WO 4 (20%)/BiOBr heterostructure exhibited superior photodegradation efficiencies (98%) towards Lanasol Red 5 B (LR5B), which was 4.67- and 3.38-fold higher than pristine BiOBr and Ag 2 WO 4 , respectively. The principal reason for the elevated photocatalytic property of Ag 2 WO 4 /BiOBr was ascribed to the formation of oxygen vacancies and intimate Z-scheme heterostructure between Ag 2 WO 4 and BiOBr, improving the light trapping capability and facilitating separation of photo-induced charge. Moreover, the removal efficiencies of Ag 2 WO 4 /BiOBr heterostructure towards TC (tetracycline), CIP (ciprofloxacin) and RhB (rhodamine B) were 74%, 23%, and 13%, respectively. The simultaneous degradation experiment confirmed the competitiveness between LR5B and CIP for active species, leading to the inferior degradation efficiency for LR5B, along with the experimental factor towards LR5B was researched. The probable Z-scheme mechanism and the significant role of hydroxyl radical and superoxide radicals were demonstrated by the radical capture experiment and electron spin resonance (ESR). The Z-scheme mechanism has resulted in prominent improvement in charge separation, along with higher redox properties, which were responsible for the excellent photocatalytic activity.
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高影响因子
LANGMUIR
·
2022
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IF 4.331
Peng Du,Laihui Luo,Di Wang,Weiping Li,Dandan Wang,Zhihong Mai,Ye Wang,Weiguang Ran,Guozhong Xing
To settle the unsatisfying efficiency and insufficient light harvesting ability of photocatalysts, we report on the development of Er3+/Yb3+-codoped BiOBr (BiOBr:Er3+/xYb3+) microparticles that were synthesized by a rational high-temperature solid-state reaction method. The prepared microcrystals exhibit high visible upconversion (UC) emissions with maximum intensities at x = 0.01 when excited by a 980 nm laser. Remarkably, the corresponding UC emission process is attributed to a two-photon absorption route. Furthermore, the photocatalytic activities of as-synthesized compounds were further evaluated through analyzing the visible–near-infrared light-triggered tetracycline degradation. Compared with BiOBr:Er3+ microparticles, BiOBr:Er3+/xYb3+ microparticles present superior photocatalytic properties and the optimal status is achieved when x = 0.05, in which h+, ·O2–, and ·OH active species contribute to the photocatalytic mechanism. Additionally, the designed microparticles exhibit better photocatalytic abilities than previously reported photocatalysts (i.e., TiO2, SnO2) upon full-spectrum light irradiation. These results reveal that Yb3+ codoping is able to not only enhance the UC emission properties of BiOBr:Er3+ microparticles but also reinforce their photocatalytic activities. Our findings may put forward a facile strategy to regulate the photodegradation capacity of photcatalysts.
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高影响因子
Catalysis Science & Technology
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2022
·Vol. 12
·期 22
·6771-6781
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IF 6.177
Lianghai Xia,Lingdong Kong,Jie Tan,Yuwen Wang,Shengyan Jin,Chao Wang
BiOBr can degrade pollutants under visible light, and it is a new star in the field of photocatalysis. However, its practical application still faces great challenges, and it still needs to be designed and modified to obtain high catalytic performance for efficient degradation of organic pollutants. Herein, we have realized the simple preparation and efficient catalysis of a BiOBr composite catalyst. This catalyst combines the dual effects of stable adsorption and efficient degradation. This spherical catalyst is composed of surfactant PVP and BiOBr and has higher photocatalytic efficiency. It is found that PVP on the surface of BiOBr firmly adsorbs 2,4-dichlorophenol on the surface of the catalyst, and the petal like microsphere structure makes full use of light energy to achieve high-efficiency photocatalysis. The catalytic effect of the composite catalyst is 1.53 times higher than that of the pure BiOBr catalyst. This study will help us better understand the comprehensive effects of adsorption and degradation of surfactants and catalytic materials, and develop new and reliable green photocatalysts.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Feihu Zhang,Xinyan Xiao,Yu Xiao
A novel 3D hierarchical flower-like BiOBr/Bi 3 O 4 Br heterostructure photocatalyst was synthesized by in-situ growth of ultrathin BiOBr on the surface of Bi 3 O 4 Br nanosheets through a solvothermal process. The 3D hierarchical heterostructure endows BiOBr/Bi 3 O 4 Br heterojunction with a large specific surface area and tight interfacial contact, which can provide sufficient channels for carrier migration. The introduction of Bi 3 O 4 Br can enhance the light absorption ability of BiOBr/Bi 3 O 4 Br photocatalysts. Furthermore, the staggered type II heterostructure energy band alignment formed between BiOBr and Bi 3 O 4 Br can promote the separation of photo-excited carriers. The improved performance of carrier migration and light absorption ability was evaluated by SEM, TEM, BET, EIS , and DRS tests. The results of transient photocurrent response and photoluminescence tests confirmed the improvement for separating photoexcited carriers. The optimal 20% BiOBr/Bi 3 O 4 Br sample exhibited the greatest photocatalytic degradation rate of 97.1% for RhB and 89.4% for TC, under 90 min of simulated solar light irradiation. Its apparent rate constant k values are 0.03378 and 0.02013 min −1 , being 9.44 and 2.18 folds than that of Bi 3 O 4 Br, 2.76 and 1.47 folds than that of BiOBr. The free radical scavenging experiment results showed that h + and •O 2 - are the prime active species during the photodegradation process. Hence, a possible photocatalytic mechanism of type II BiOBr/Bi 3 O 4 Br heterojunction was proposed.
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高影响因子
APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Yingyue Hu,Xinyao Hu,Lu Xue,Baolong Cui,Yi Du
The modulation of crystal surface is one of the important means of photocatalyst modification. BiOBr photocatalyst with exposed (1 1 0) facets was synthesized at room temperature and pressure using CaCO 3 as a directing agent in this experiment. The addition of CaCO 3 not only promoted the exposed facets of BiOBr from (1 0 2) to (1 1 0), but also improved its ability of photocatalytic degradation of pollutants, meanwhile, changed the specific surface area of BiOBr, provided more active sites, and enhanced the adsorption capacity of BiOBr. At the same time, the effects of different alkaline earth metals on the performance of BiOBr photocatalytic materials were compared, it was determined that the degradation rate of RhB of BiOBr photocatalyst reached 97% within 60 min when adding 500 wt% CaCO 3 , and the main active group in the degradation experiment was h + . In conclusion, BiOBr with different main exposed facets was prepared in this paper, and a new idea was provided for alkaline earth metals in the field of photocatalysis.
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Reaction Kinetics Mechanisms and Catalysis
·
2021
·Vol. 134
·期 2
·1003-1015
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IF 2.081
Chen Anna,Zhang Jin,Zhou Yi,Tang Haiqin
In this study, the MOF-5/BiOBr photocatalyst with microsphere structure was synthesized by hydrothermal method for the first time. The crystal structure, morphology, photoelectric performance and photocatalytic activity of the samples were characterized by XRD, SEM, TEM, XPS and electrochemistry. The results show that the synthesized MOF-5/BiOBr photocatalyst exhibits better photocatalytic performance than pure MOF-5 and BiOBr under simulated sunlight. The efficiency of Rhodamine B (RhB) removal based MOF-5/BiOBr composite (MOF-5 with mass ratio of MOF-5/BiOBr = 20 wt% of) reached 99.7%. The possible photocatalytic mechanism is discussed through the capture experiment of active species. The enhanced photocatalytic performance of the MOF-5/BiOBr composite may be related to the interaction between BiOBr and MOF-5 and the type II charge transfer path. The catalyst has simple preparation process, low cost, high activity under natural light, and high efficiency, and is expected to play a role in the treatment of environmental wastewater. This work provides a new insight for designing MOF-5 based photocatalyst.
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高影响因子
VACUUM
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2023
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IF 4
Dayu Li,Longfei Li,Wenchao Zhang,Chao Zhang
Construction of heterojunction can inhibit the recombination of electron holes and improve the sunlight absorption, thus improving the photocatalytic performance of semiconductors. In this research, Bi@BiOBr/ZnO coatings are in-situ grown on nickel foam by a facile hydrothermal method . Before coating deposition the nickel foam surface is modified under different radiofrequency plasma atmospheres (O2, H2/Ar, Ar, CH4) in pulsed mode. The plasma treating effects on the coating morphology, crystallization, chemical and photocatalytic properties are investigated. It is found that various morphologies of Bi@BiOBr/ZnO coatings have been grown on the plasma-treated nickel foam surface by using the different plasma atmospheres. The polycrystalline structure including Bi, BiOBr and ZnO phases has been identified for the different coatings. The photocatalytic mechanism includes the SPR effect of metal Bi which can inhibit the recombination of electron holes and heterojunction structure of BiOBr–ZnO has good effects on the photodegradation performance of MO solution under visible light .
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Sustainability
·
2026
·Vol. 18
·期 18
·9444
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IF 4.1
Nianping Chi,Yang Luo,Zhenwen Yang,Yuanping Li,Zhenyu Wang,Jun Zhou
Biochar was synthesized through high-temperature pyrolysis, and a biochar-supported nitrogen and sulfur co-doped BiOBr (BC/N,S-BiOBr) photocatalyst was successfully prepared via a one-step solvothermal method, which was applied for the degradation of tetracycline (TC), a widely detected representative antibiotic pollutant, in aqueous solution. This study systematically investigated the effects of catalyst type, initial solution pH, catalyst dosage and initial TC concentration on the photocatalytic degradation process. The experimental results showed that the as-prepared BC/N,S-BiOBr composite exhibited a flower-like nanosphere morphology, characterized by a more complete three-dimensional hierarchical structure, larger specific surface area and suitable optical absorption band, which endowed the composite with significantly improved visible-light absorption capability. Under the optimized reaction conditions (pH = 5, catalyst dosage of 0.7 g/L, initial TC concentration of 10 mg/L), the degradation efficiency of TC over BC/N,S-BiOBr reached 98% after 50 min of visible-light irradiation. In situ electron paramagnetic resonance (EPR) spectroscopy combined with radical quenching experiments confirmed that the modified composite contained abundant oxygen vacancies, and the main reactive species governing TC degradation were identified as photogenerated holes (h+), hydroxyl radicals (·OH) and superoxide radicals (·O2−), with their contribution to TC degradation following the order of h+> ·OH > ·O2−. In summary, by converting municipal sludge into biochar-supported N,S-BiOBr photocatalyst, the modified BC/N,S-BiOBr composite exhibits faster photocatalytic reaction kinetics and higher tetracycline removal efficiency compared with pristine BiOBr, while simultaneously enabling waste resource recovery, solar energy exploitation, and water purification, thereby comprehensively promoting sustainable development in terms of environmental remediation, resource circulation, and low-carbon operation.
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高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2023
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IF 7.8
Zezheng Lin,Yang Guo,Xiaoxuan Qu,Yuying Xiang,Shuwen Shen,Xin Zhu
Widely diffused pollution of endocrine disrupting chemicals (EDCs) has indeed threatened the safety of ecological environment and human health. A hydrangea-like Fe doped BiOBr (Fe-BiOBr) microsphere was synthesized and used to enhance the performance of UV/persulfate (PS) system using bisphenol A (BPA) as the targeted contaminant. The photochemical characterization of Fe-BiOBr showed that Fe doping markedly improved the separation efficiency of photoelectron and hole, and enhanced the utility rate of luminous energy of BiOBr. Degradation test demonstrated that with the assistance of Fe-BiOBr, the efficiency of UV/PS system was increased by 1.8 times, while 85.7% of BPA can be degraded within 10 min. Through scavenging experiments, sulfate radical (SO 4 •− ), superoxide radical (O 2 •− ), and hole were demonstrated as the dominate reactive species (RSs) in UV/Fe-BiOBr/PS system. Then, the role and mutual transformation of RSs was further clarified by radicals steady-state concentrations estimation and X-ray photoelectron spectroscopy (XPS) analysis. Based on the results, the produced O 2 •− can be subdivided into confined O 2 •− and free O 2 •− from the UV induced oxygen vacancy and photoelectron, respectively. Of which, SO 4 •− and confined O 2 •− were symbiotic via the redox cycle of Fe species. Significantly, only 2.6% of TOC can be simultaneously removed within 10 min treatment time, suggesting the incomplete degradation of BPA. For this, 16 organics was detected using LC-MS and the degradation route of BPA was also determined based on the intermediates analysis. Finally, the application possibility of the system was evaluated from the perspective of ecotoxicity by ECOSAR and T.E.S.T. softwares. This study investigates the dual effect of transition metal doped semiconductor on coupling system, and provides new insights into the role of O 2 •− .
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Yibo Ma,Xiangyu Xu,Tianyi Yang,Yuying Shen,Feng Jiang,Yawei Zhang,Xiaoting Lv,Yunming Liu,Bo Feng,Guangbo Che,Lijing Wang
The development of bifunctional reaction by combining CO 2 reduction with antibiotics degradation is of great significance. Designing bifunctional catalysts with excellent performance is the focus of scholars' research. In this paper, Co-doped BiOBr ultra-thin nanosheets exposing rich (102) active crystal faces were prepared by one-step hydrothermal method. Since Co 2+ has a smaller radius than Bi 3+ , Co was successfully incorporated into the lattice of BiOBr, which changed the crystal structure of BiOBr and obtained thinner nanosheets with rich lattice defects. The Gibbs free energy of CO 2 reduction reaction was synergistically optimized by the combination of exposing (102) active crystal faces and introducing lattice defects. In addition, the addition of Co changed the band structure of BiOBr and improved the carrier separation ability, making Co-BiOBr be an excellent bi-functional photocatalyst for CO 2 reduction and co-degradation of tetracycline, realizing the synergistic process of environmental purification and energy conversion. This work provides theoretical and experimental reference for the rational design of bifunctional photocatalysts.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Fangxia Xie,Qing Xi,Mei Zhang,Rui Li,Xiaoming Gao,Houfen Li,Xiaochao Zhang,Yawen Wang,Yunfang Wang,Xiuping Yue,Jianxin Liu,Caimei Fan
Directing the transfer of photoinduced charges to various reaction sites through catalyst design plays crucial roles in enhancing photocatalytic oxygen evolution. Herein, we used a facile alcoholysis method to synthesize amorphous FeOOH modified light-switchable oxygen vacancies BiOBr, which exhibited outstanding photocatalytic oxygen evolution activity. Density functional theory calculations, photoelectronchemical tests and kelvin probe force microscopy revealed that FeOOH overlayer acts as the hole storage layer, while oxygen vacancies (OVs) provided a number of electron trap centers. Benefiting from this synergistic effect, the photogenerated charges showed an outstanding directional transfer performance, which greatly prolong the lifetime of the photo-induced charge carriers. Moreover, as a cocatalyst for water oxidation, FeOOH can effectively lower the kinetics barriers and provide more active sites for oxygen evolution reaction. Therefore, under simulated sunlight irradiation, the 2%FeOOH/BiOBr photocatalyst demonstrated remarkable photocatalytic activity towards oxygen evolution, achieving a rate of 284.34 μmol·g −1 ·h −1 , which is around 1.71 folds than pure BiOBr. Finally, the possible reaction mechanism has also been discussed. This work has provided valuable insights and inspiration for the effective design and optimization of BiOBr-based catalysts, which play a critical role in facilitating efficient directional transfer of photogenerated charges.
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