JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Jiashu Huang,Xiaoshan Zheng,Yang Liu,Fengliang Wang,Daguang Li,Haijin Liu,Ruobai Li,Tiansheng Chen,Wenying Lv,Guoguang Liu
Bismuth oxyiodide (BiOI) has garnered intense attention in the field of photocatalysis for environmental remediation; however, it suffers from a high electron-hole recombination rate. In this study, for the first time, we report on a facile strategy for the creation of oxygen vacancies in BiOI via strontium (Sr 2+ ) doping. The as-prepared 0.45-SrBiOI demonstrated significantly enhanced photocatalytic degradation of indometacin under visible light exposure, which was almost 10 folds higher than pristine BiOI. This augmented photocatalytic performance was ascribed to the accelerated separation of charge carriers by oxygen vacancies, as well as Sr ion trapping electrons. Reactive species determination experiments revealed that O 2 ▪− , 1 O 2 , and h + were the dominant active species. Finally, potential indometacin degradation pathways were proposed based on the identification of degradation by-products and theoretical calculations. This study offers new perspectives for the synthesis of highly efficient and cost effective BiOI-based photocatalysts, and provides a promising strategy toward advanced environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2011
·Vol. 14
·期 2
·700-707
·
IF 4.006
Kun Zhang,Dieqing Zhang,Jie Liu,Kuaixia Ren,Hui Luo,Yingjie Peng,Guisheng Li,Xibin Yu
Iodine-incorporated BiOCl (I–BiOCl) core–shell microspheres were for the first time fabricated using a one-step approach under atmospheric pressure. The morphology and compositional characteristics of the 3D hierarchitectures (HAs) of BiOCl were investigated by various techniques such as XRD, FESEM, TEM, EDS, XPS and PL. On the basis of observing the structure of BiOCl and iodine-containing BiOCl at different intervals of reaction time, a three-stage growth mechanism that involves an initial Ostwald ripening process followed by a self-assembly process is proposed. Meanwhile, iodine anions were utilized as both structure-directing agents for fabricating hollow, core–shell, solid structure and doped ions incorporated into the framework of the core–shell BiOCl spheres to extend the light adsorption edge to the visible light region. UV-vis spectra reveal that the band energies of the iodine anions-modified BiOCl (I–BiOCl) hierarchical hollow, core–shell, and solid samples (2.43 eV, 2.28 eV and 2.04 eV, respectively) exhibit obvious red-shifts with respect to that of the pure hollow BiOCl sample (3.23 eV). I–BiOCl without adding poly(vinylpyrrolidone) (PVP) was researched. This result demonstrated that the formation of the core–shell structure is induced by a synergetic effect by iodine and PVP. The specific surface area and porosity of the iodine anions-modified hierarchical BiOCl were also investigated by using nitrogen adsorption–desorption isotherms. The as-prepared I–BiOCl core–shell microspheres showed much higher photocatalytic activity than that of the reported TiO2−x−yNxFy(SC)-3 and Bi2WO6, which was evaluated by the degradation of phenol under visible light (λ > 420 nm) and Rhodamine-B (RhB) dye under visible light (λ > 420 nm) and sun-light irradiation.
研究领域:
材料科学
·
纳米技术
·
光催化化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Jing-Ping Zhu,Yi-Li Lin,Tian-Yang Zhang,Tong-Cheng Cao,Bin Xu,Yang Pan,Xi-Tong Zhang,Nai-Yun Gao
Iohexol can hardly be removed in conventional wastewater treatment processes due to its non-biodegradable and hydrophilic characteristics. In this study, a kinetic model was established to describe iohexol degradation in Fe (II)-activated persulfate system. The developed model can well predict iohexol degradation and evolution of sulfate radical with various initial iohexol and oxidant (ferrous iron and persulfate) concentrations under various water matrix. The rate constant of iohexol reacting with sulfate radical was calculated as (1.83 ± 0.10) × 10 9 M −1 s −1 . The effects of the two most common components in natural water bodies, chloride ion and natural organic matter (NOM) on iohexol degradation, were also studied. Both experimental data and model results showed that the low concentration of chloride ion promoted iohexol degradation while high concentration inhibited it, and NOM slightly inhibited iohexol degradation. Besides, radical quenching tests were employed to identify the main radicals formed in the system and further verified the model accuracy. The model is also capable of predicting the atrazine degradation with the correlation coefficients between the experimental data and predicted results above 0.97, suggesting the applicability of the established model for some other recalcitrant contaminant degradation in the Fe 2+ /PS system.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Weidong Zhu,Lei Kang,Tao Yu,Bihu Lv,Yangrunqian Wang,Xingyu Chen,Xiaoyong Wang,Yong Zhou,Zhigang Zou
Herein, we demonstrate that the facile face-down annealing route which effectively confines the evaporation of residual solvent molecules in one-step deposited precursor films can controllably enable the formation of (110) textured CH3NH3PbI3 films consisting of high-crystallinity well-ordered micrometer-sized grains that span vertically the entire film thickness. Such microstructural features dramatically decrease nonradiative recombination sites as well as greatly improve the transport property of charge carries in the films compared with that of the nontextured ones obtained by the conventional annealing route. As a consequence, the planar-heterojunction perovskite solar cells with these textured CH3NH3PbI3 films exhibit significantly enhanced power conversion efficiency (PCE) along with small hysteresis and excellent stability. The champion cell yields impressive PCE boosting to 18.64% and a stabilized value of around 17.22%. Particularly, it can maintain 86% of its initial value after storage for 20 days in ambient conditions with relative humidity of 10–20%. Our work suggests a facile and effective route for further boosting the efficiency and stability of low-cost perovskite solar cells.
研究领域:
材料科学
·
光伏技术
·
太阳能电池
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2021
·Vol. 9
·期 3
·494-500
·
IF 6.569
Yaxin Xu,Jiarui Hu,Xingfu Xiao,Huanfeng He,Guoliang Tong,Junnian Chen,Yunbin He
Bismuth halide hybrid perovskites have aroused intense interest in optoelectronic fields. However, developing novel bismuth halide hybrid perovskites to balance the hydrophobicity and electron transport ability is still challenging. Besides, the conventional temperature-lowering crystallization method usually causes high supersaturation and facilitates the formation of impurity phase and defect structures. Herein, we reported the synthesis of bulk zero-dimensional (0D) guanidinium bismuth iodide ((Gua)3Bi2I9) single crystals via an antisolvent-assisted evaporation crystallization method at room temperature. The as-grown (Gua)3Bi2I9 single crystals have sizes of up to 5 × 5 × 0.6 mm3. Besides, they have shown to have distinct semiconductor properties, such as a direct bandgap of 2.08 eV, low density of defects and traps of 3.35 × 1010 cm−3 and obvious photoconductivity. Moreover, (Gua)3Bi2I9 exhibits a large bulk resistivity of 3.94 × 1011 Ω cm and strong X-ray attenuation coefficient, which satisfies the distinct attributes for X-ray detection. As a consequence, the assembled vertical Au/(Gua)3Bi2I9 single crystal/Au X-ray photoconductor achieves a sensitivity of 18.23 μC Gyair−1 cm−2 at a bias voltage of 500 V. This study provides a new horizon for the design and synthesis of bismuth halide perovskites toward non-toxic X-ray detectors.
研究领域:
材料科学
·
光电领域
·
医学检测
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2022
·Vol. 37
·期 11
·1868-1876
·
IF 2.909
Lu Yuxiang,Huang Lvtao,Mao Jikai,Zhou Jianguang
The effect of indices of crystal facets on the properties of nanomaterials has attracted widespread interest. However, the synthesis of silver chloride (AgCl) nanocrystals with high-index facets is still a difficult problem. By precisely controlling iodine ions (I − ), AgCl nanocrystals with 24 high-index {433} facets were successfully synthesized. We discussed I − selective landing on specific positions of crystal and its role in controlling the formation of high-index facets. In addition, we also utilized the AgCl crystals to catalyze the degradation of hexavalent chromium, an environmental pollutant. {433}-bounded AgCl crystals exhibits twice catalytic efficiency for K 2 Cr 2 O 7 degradation compare with {311}-bounded. Moreover, its catalytic efficiency is much higher than that of AgCl nanocrystals exposed low-index facets. Graphical abstract Description the formation of AgCl crystal with {433} facets.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 32
·10462-10471
·
IF 7.393
Jingjun Yang,Qingyuan Li,Congcong Ding,Lili He,Liang Xue,Wencai Cheng,Zhentao Zhang,Guilin Wei,Yi Liu,Long Huang,Yi Xie,Xirui Lu
This study is dedicated to investigating the performance of B2O3–Bi2O3–ZnO low-temperature glass-ceramics to immobilize iodine-loaded silver-coated silica-gel (AgIs). Various mass fractions of iodine (15, 20, 25, and 30 wt%) in AgIs were studied. The degree of amorphization and density increased with increasing sintering temperature for all immobilization samples, where, the sample with 20 wt% iodine in AgIs presented optimal immobilization results at 600 °C. The diffraction peak area of AgI was the lowest and the degree of amorphization was the highest (0.562) for the sample with 20 wt% iodine in silver-coated silica gel when it was sintered at 600 °C. SEM-EDS results showed that two approaches contributed to the immobilization of AgIs: the first one is that AgIs participates in the formation of the glass-ceramics phase, which makes iodine uniformly immobilized in the glass mesh; the second one is that the glass-ceramics phase physically encapsulates a small range of aggregated AgI. The results of TGA-DSC analysis showed that the samples had a high water content, which facilitated the lowering of the glass transition temperature of the samples and thus the curing of iodine. Most importantly, when the sintering temperature is below 600 °C, the evaporation of iodine is minimal to negligible. The leaching results showed that the samples were highly resistant to leaching of elemental iodine. This experiment verified the feasibility and efficiency of B2O3–Bi2O3–ZnO ternary glass-ceramics to immobilize iodine-loaded silver-coated silica-gel at low temperatures.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2020
·
IF 2.726
Guilin Wei,Xiaoyan Shu,Zhentao Zhang,Qingyuan Li,Yi Liu,Xiao Wang,Yi Xie,Bingsheng Li,Dadong Shao,Xirui Lu
The treatment of radioactive iodine waste is a difficulty in the field of nuclear waste disposal. In this work, the B 2 O 3 –Bi 2 O 3 –ZnO based materials with 50 mol% of B 2 O 3 is chosen to immobilize silver-coated silica gel with different iodine loadings at 500, 550, and 600 °C. The results show that the highest amorphous fraction is gotten as 0.88 for the sample with 20 wt % of iodine in silver-coated silica gel sintered at 600 °C. In addition, both of the amorphous fraction and density increase with increasing temperature. The SEM-EDS result indicates that part of iodine is fixed into the glassy phase and other AgI grains are physically wrapped by the vitrified bulk. Our findings demonstrate the feasibility of B 2 O 3 –Bi 2 O 3 –ZnO based materials for the immobilization of silver-coated silica gel with different iodine loadings.
研究领域:
核废料处理
·
材料科学
·
放射性废物管理
✓ 已验证
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 10
·5913-5918
·
IF 3.119
Hang Liu,Jian Cai,Man Luo,Chang Chen,Pei Hu
A simple one-step approach was employed to fabricate novel BiOI nanosheets and mesoporous Bi4O5I2 single-crystal nanosheets. The formation mechanism of the as-prepared two-dimensional mesoporous sheet-like structure and photocatalytic activities were systematically discussed. The stripping effect of I2 vapor generated in the calcination process was concluded to be responsible for the formation of this two-dimensional mesoporous structure. Moreover, relying on this advantage, Bi4O5I2 displayed excellent activities in the degradation of RhB and salicylic acid under visible light irradiation.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Xintong Yao,Haoran Zhen,Dafeng Zhang,Junchang Liu,Xipeng Pu,Peiqing Cai
Constructing full spectrum photocatalyst is an effective strategy to improve the conversion efficiency of solar energy. In this work, BiOI:Yb 3+ ,Er 3+ /Bi 2 O 4 (BYE/BO) direct Z-scheme heterojunction photocatalysts were successfully synthesized by a fast and simple microwave-assisted hydrothermal method . XRD , XPS , FE-SEM, TEM , PL , DRS, and BET were used to investigate the physical and chemical properties of samples. Compared to pure BYE and BO, as-synthesized BYE/BO samples had significantly improved photocatalytic activity in the degradation of Ciprofloxacin and Rhodamine B when exposed to visible or near infrared light (NIR) light. Among them, 20% -BYE/BO has the best photocatalytic activity , and its NIR-light degradation ratio of Ciprofloxacin is as high as 66 and 103 times that of BO and BYE, respectively. The enhanced photoactivity of as-synthesized BYE/BO heterojunction is attributed to synergistic effects of the upconversion and the direct Z heterojunction . Moreover, capture experiment showed that the·O 2 - and h + were main active species, and the directive Z-scheme mechanism was proposed.
研究领域:
材料科学
·
光催化
✓ 已验证
DOI
高影响因子
ChemCatChem
·
2016
·Vol. 8
·期 24
·3780-3789
·
IF 4.724
Shunqin Luo,Jiawei Chen,Zhaohui Huang,Chen Liu,Minghao Fang
Graphical Crystal clear : BiOI/TiO 2 heterostructured nanofibers with exposed (1 1 0) BiOI facets are synthesized by electrospinning and hydrothermal methods. The BiOI/TiO 2 heterostructures with exposed (1 1 0) BiOI facets exhibit a high photocatalytic activity for the degradation of methylene blue and phenol. Bismuth oxyiodide/titanium dioxide (BiOI/TiO 2 ) heterostructured nanofibers with exposed (1 1 0) BiOI facets were synthesized by electrospinning and hydrothermal methods. The BiOI/TiO 2 heterostructures with exposed (1 1 0) BiOI facets exhibited an enhanced photoreactivity, for which the methylene blue and phenol degradation rate is increased by more than two times and the photocurrent density is 12 times as high as that of BiOI with exposed (1 1 0) facets. EPR spectroscopy indicated that the hydroxyl radicals and superoxide radicals could be generated by BiOI/TiO 2 heterostructures with exposed (1 1 0) BiOI facets. Based on the experimental results, the enhancement of the photocatalytic activity could be attributed to the strong oxidization by hydroxyl radicals, enlarged band gap, lowered valence band position, and suppressed recombination of photoinduced electron–hole pairs by the manipulation of heterostructures with exposed (1 1 0) BiOI reactive facets.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-12
·
IF 14.7
Feng Wenting,Wei Xinru,Yang Jianhang,Ma Chenyu,Sun Yiming,Han Junwei,Kong Debin,Zhi Linjie
Rechargeable sodium-chlorine (Na-Cl 2 ) batteries show high theoretical specific energy density and excellent adaptability for extreme environmental applications. However, the reported cycle life is mostly less than 500 cycles, and the understanding of battery failure mechanisms is quite limited. In this work, we demonstrate that the substantially increased voltage polarization plays a critical role in the battery failure. Typically, the passivation on the porous cathode caused by the deposition of insulated sodium chloride (NaCl) is a crucial factor, significantly influencing the three-phase chlorine (NaCl/Na + , Cl - /Cl 2 ) conversion kinetics. Here, a self-depassivation strategy enabled by iodine anion (I - )-tuned NaCl deposition was implemented to enhance the chlorine reversibility. The nucleation and growth of NaCl crystals are well balanced through strong coordination of the NaI deposition-dissolution process, achieving depassivation on the cathode and improving the reoxidation efficiency of solid NaCl. Consequently, the resultant Na-Cl 2 battery delivers a super-long cycle life up to 2000 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）