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
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材料科学
·
放射性废物管理
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2018
·
IF 6.434
Long Liu,Ning Chen,Yong Lei,Xuyan Xue,Lina Li,Jiancheng Wang,Sridhar Komarneni,Huaiyong Zhu,Dongjiang Yang
Removal of the toxic selenium compounds, selenite (SeO 3 2− ) and selenate (SeO 4 2− ), from contaminated water is imperative for environmental protection in both developing and industrialized countries. Providing high selectivity adsorbents to the target ions is a big challenge. Here we report that micro sphere-like δ-Bi 2 O 3 (MS-δ-Bi 2 O 3 ) with surface oxygen vacancy defects can capture hypertoxic SeO x 2− anions from aqueous solutions with superior capacity and fast uptake rate. High capture selectivity to SeO 3 2− anions is observed, since the O atoms of SeO 3 2− anions fill the oxygen vacancies on the (111) facet of δ-Bi 2 O 3 forming a stable complex structure. This mechanism is distinctly different from other known mechanisms for anion removal, and implies that we may utilize surface defects as highly efficient and selective sites to capture specific toxic species. Thus, we present a new route here to design superior adsorbents for toxic ions.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 7
·076504
·
IF 4.386
X. Y. Wang,J. F. Huang,C. H. Yu,F. Y. Li,Z. Y. Cai,Y. Zhang,C. G. Fan,L. Z. Pei
DyF3/Bi2O3 nanowires with orthorhombic DyF3 and triclinic Bi2O3 phases were synthesized via a facile hydrothermal route using sodium dodecyl sulfate (SDS). The composite nanowires were characterized by X-ray diffraction, electron microscopy, X-ray photoelectron spectroscopy and electrochemical impedance spectroscopy. The obtained composite nanowires have the length of longer than 10 μm and diameter of about 20–100 nm. X-ray photoelectron spectroscopy confirms the composition of Dy, F, Bi and O in the composite nanowires. The formation process of the DyF3/Bi2O3 nanowires was analyzed based on the morphological and structural evolution of the products from different growth conditions. The cyclic voltammetry (CV) measurement demonstrates good electro-catalytic activity of the composite nanowires towards L-cysteine. Two pairs of CV peaks at +0.08 V, −0.43 V and −0.48 V, −0.78 V, respectively are observed at the DyF3/Bi2O3 nanowires modified glassy carbon electrode. DyF3/Bi2O3 nanowires modified glassy carbon electrode detects L-cysteine linearly over a concentration range from 0.001 to 2 mM with a detection limit of 0.25 μM. Moreover, the results show good selectivity, reproducibility and stability of the DyF3/Bi2O3 nanowires as a promising candidate for L-cysteine determination.
研究领域:
材料科学
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生物传感
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Qi Wang,Enqin Liu,Chenlu Zhang,Siwei Huang,Yanqing Cong,Yi Zhang
A novel visible-light-active Cs 3 PMo 12 O 40 /Bi 2 O 3 (CsPMo/Bi 2 O 3 ) composite was prepared by a simple dissolution-precipitation method. The as-prepared samples were characterized by XRD , XPS , FT-IR, SEM , UV–Vis DRS , N 2 adsorption-desorption isotherms and electrochemical analysis . The results revealed that Bi 2 O 3 was successfully modified by trace CsPMo. After the addition of H 3 PMo 12 O 40 acid (HPMo), the surface of Bi 2 O 3 can be roughed. Subsequently, the presence of Cs 2 CO 3 can neutralize the protons of HPMo forming CsPMo precipitate on Bi 2 O 3 . Comparing to naked Bi 2 O 3 and CsPMo, the binary composite exhibited many beneficial characteristics in charge generation and separation, such as formation of p-n heterojunction , decreased band gap, enhanced photocurrent response and greatly reduced charge transfer resistance. The photocatalytic activities of the as-prepared samples were evaluated by the degradation of phenol under visible light . The calculated pseudo-first-order rate constants for phenol degradation were 2.7 and 14.8 times relative to that on Bi 2 O 3 and CsPMo, respectively. Dramatically enhanced photocatalytic performance can be observed when the optimal CsPMo/Bi 2 O 3 composite (2.5% CsPMo) was applied. The major active species involved in the degradation process are in the following order: superoxide radical (O 2 − ) > hydroxyl radical ( OH) ≈ hole (h + ). Besides, the CsPMo/Bi 2 O 3 composite also displayed good stability in cyclic experiments.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NUCLEAR MATERIALS
·
2020
·
IF 2.485
Guilin Wei,Xiaoyan Shu,Zhentao Zhang,Fen Luo,Yi Liu,Bingsheng Li,Yi Xie,Lan Wang,Xirui Lu
The treatment of radioactive iodine waste is particularly difficult because of its volatilization issues. In this study, amorphous silica gel was used to gradually replace crystalline SiO 2 in B 2 O 3 -Bi 2 O 3 -ZnO-SiO 2 based materials aimed to investigate the effects on iodine waste immobilization. Samples with different silica gel replacements (0, 20, 40, 60, 80, and 100%) were characterized by XRD, FT-IR, and SEM-EDS. The results showed that silica gel had a benefit in the immobilization of iodine waste at low-sintering temperatures (500, 550, and 600 °C). At 550 °C, AgI was immobilized in the pure glassy matrix and elements (Ag and I) distributed uniformly on the matrix surface. FT-IR analysis presented the tetrahedral SiO 4 units in the sintered samples that were mainly in the form of sheets. Our work revealed the potential application of silica gel in the field of iodine waste immobilization.
研究领域:
核废料管理
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2021
·
IF 3.531
Xiyang He,Wencai Cheng,Meng Yan,Wanrong Song,Yi Liu,Zhentao Zhang,Tao Ma,Weizhen Liu,Xirui Lu
As to spent fuel reprocessing in the nuclear industry, disposal of iodine-containing silver silica gel (AgIs) is a challenge. Method for immobilizing AgIs with the B-Bi-Zn glass powder at low temperatures has been applied to cope with this dilemma. In ingredient analysis, only diffraction peak of AgI can be detected in the sintered samples. In addition, the element analysis confirmed the existence and distribution of AgI in the solidified matrix. According to leaching experiment, low leaching rate (10 −6 ) demonstrated that the sintered body possessed good chemical stability in liquid circumstance. Based on the research statistics, quality loss ratio of sample (98.58 g) sintered at 600 °C under the gas pressure sintering was merely 1.61%. Meanwhile, the quality retention proportions of AgI and raw powder from thermogravimetric analysis were certified as 98.09% and 96.19% respectively at 600 °C. Therefore, this study comprehensively proved the glass powder curing prospective for AgIs disposal.
研究领域:
核工业
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材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Qiang Xian,Xin Xiao,Jiaping Yu,Yi Gan,Li Chen,Xinmiao He,Enchao Wang,Hui Dan,Lin Zhu,Yi Ding,Tao Duan
The immobilization of iodine waste suffers from serious iodine loss during heat treatment. Herein, we reported on the high iodine retention immobilization of simulated radioiodine-contaminated Bi0–SiO2 sorbent in B–Bi–Zn oxide glass using Bi2O3 as a stabilizer under a N2 atmosphere. The effects of the Bi2O3 content and sintering atmosphere on the iodine immobilization behaviors (iodine retention ratio, phase composition, microstructure, and chemical stability) were investigated. It was found that the decomposition of BiI3 was prevented by adding Bi2O3 and sintering in a N2 atmosphere. The iodine retention ratio in the obtained glass waste form was significantly enhanced with increasing Bi2O3 content and sintering in the N2 atmosphere due to the synergistic effect. The achieved record-high iodine retention (92.22 ± 2.6%) was much higher than that of conventional heat treatment route (18.01 ± 3.5%). The results demonstrated that iodine was effectively immobilized through the formation of stable BixOyI (Bi5O7I and BiOI). Furthermore, the obtained iodine waste form exhibited excellent compactness and chemical stability. Owing to its high iodine retention ratio, this route can be employed to effectively immobilize radioactive iodine.
研究领域:
材料科学
·
核废料管理
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jie Cui,Ruotong Zhu,Meiqi Ding,Guoli Chen,Shuhua Liang,Shaodong Sun
Construction of S-scheme heterojunction with 2D/2D structure can accelerate the carrier separation and migration owing to the induced built-in electric field, short carrier migration distance and large contact area. Herein, we develop a simple one-step solvent thermal method for the synthesis of novel Bi 2 O 3 -BiOI 2D/2D S-scheme heterojunction with intimate interfacial contact. As expected, the as-prepared Bi 2 O 3 -BiOI heterojunction presents higher visible-light driven photodegradation of tetracycline (TC), as well as rhodamine B (RhB), methyl orange (MO), and tetracycline hydrochloride (TC-HCl), than the counterparts. Besides, the potential degradation pathways of TC are elucidated and the toxicities of intermediates are assessed in detail. Significantly, the mechanism insight into S-scheme charge transfer mechanism in Bi 2 O 3 -BiOI 2D/2D heterojunction is uncovered in depth by density functional theory calculations and a series of experimental evidences. This work affords a useful inspiration on constructing high-performance BiOI-based photocatalysts via engineering of heterojunction and morphology for organic hazards removal.
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
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Haifeng Yang,Zhiqiang Qiao,Weimiao Wang,Pengfei Tang,Shuaishuai Man,Xiaodong Li,YuTing Xie,Deyun Tang,Xueming Li,Guangcheng Yang
Private information protection of electronic chips which store large amounts of sensitive data, is a crucial issue in electromechanical systems nowadays. Here, a self-destructive microchip based on an instantaneous thermite reaction is designed to prevent the leakage of electronic information. The device is consisted of a silicon test wafer and an upper energetic film coated by a simple drop-casting technique. A series of Al/BiOX-based nanothermites have been prepared for decreasing the reaction sensitivity, meanwhile optimizing the destruction efficiency of the energetic film system. Among them, Al/Bi 2 O 3 nanothermite containing 30 wt% BiOBr possesses a low sensitivity (45 J), the maximum pressure peak (1.93 MPa) and pressure effect duration due to multiple interactions of the three nano-scale energetic components. Besides, the energetic film prepared by this nanothermite fomula also exhibits a more effective destruction of the device. The high-speed photography results demonstrate that the violent reaction shatters the thick energetic microchip (∼1 mm) within merely 0.5 ms. Importantly, the efficient destruction of energetic microchips shows excellent reproducibility in different working scenes, including Air or Ar atmosphere. It is believed that this self-destructive device with environmentally friendly components and simple but adaptive design can be extensively used in various electric microcomponents.
研究领域:
材料科学
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电子工程
·
安全技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Wenlong Zhang,Xinyu Ping,Bin Meng,Qingqing Yang,Hao Wang,Rongcheng Pan
Bi 2 O 3 -based high-entropy ceramics of (Bi 1-x (Y 0.2 Er 0.2 Zr 0.2 Gd 0.2 Dy 0.2 ) x ) 2 O 3±δ ((Bi 1-x (YEZGD) x ) 2 O 3±δ , x = 0.1, 0.15, 0.2 and 0.3) were synthesized via solid-state reaction method combined with conventional sintering (in 850–930 °C for 10 h). The samples of (Bi 1-x (YEZGD) x ) 2 O 3±δ (x = 0.15, 0.2, and 0.3) possess a fluorite-structured phase (δ-phase), while 18.50 wt% tetragonal β-phase coexists with the δ-phase in (Bi 0.9 (YEZGD) 0.1 ) 2 O 3 . All samples exhibit a uniform elemental distribution and a high relative density of 93.01–96.57 %. Among all compositions, (Bi 0.8 (YEZGD) 0.2 ) 2 O 3±δ demonstrates the highest ionic conductivity (1.32 × 10 −4 –1.09 × 10 −1 S/cm in 300–550 °C), approximately 5.7 times higher than that of the single-doped Bi 2 O 3 -based ceramic of (Bi 0.8 Er 0.2 ) 2 O 3 at 500 ° C. This enhancement is mainly attributed to the random distribution of multiple cations with various ionic radii, which induces lattice distortions that suppress dopant clustering and enhance oxygen vacancy mobility. The results suggest that the high-entropy design offers an effective strategy for improving the ionic conductivity of Bi 2 O 3 -based electrolyte at medium-low temperatures.
研究领域:
材料科学
·
陶瓷
·
固态电化学
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Yunfang Huang,Yuelin Wei,Jing Wang,Dan Luo,Leqing Fan,Jihuai Wu
Three-dimensional Bi 2 O 3 /TiO 2 hierarchical composites have been successfully prepared by a two-step hydrothermal method and subsequent calcination. The samples were characterized using XRD, SEM, TEM, EDS, BET and DRS. The measurement results signified that heterojunctions of various morphologies β -Bi 2 O 3 growing on the three-dimensional hierarchical anatase TiO 2 nanorods arrays on FTO glass were apparently formed. The morphology of Bi 2 O 3 changed from three-dimension flower-like microstructures to the sphere-like nanoparticles as the Li(OH) dosage increased. The photocatalytic results showed that all samples exhibited much higher photocatalytic activities than that of pure Bi 2 O 3 and TiO 2 (P25) in photocatalytic degradation of methyl blue (MB) under visible-light irradiation. Whereas BTL4 sample exhibited the highest photoactivity with increasing the dosage of Li(OH) to 2 mmol. Furthermore, the absorption edge of the Bi 2 O 3 /TiO 2 series composites displayed a broad-spectrum photoabsorption from UV to visible-light compared with the individual component. The as-synthesized Bi 2 O 3 /TiO 2 composites possessed excellent photocatalytic activity and outstanding recyclability. The enhanced photocatalytic efficiency was mainly attributed to the Bi 2 O 3 /TiO 2 p - n heterojunctions and hierarchical nanostructure. The recombination of photogenerated electron–hole pairs was efficiently suppressed by the Bi 2 O 3 /TiO 2 p - n heterojunctions.
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
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 6
·4265-4282
·
IF 4.682
Hu Wenna,Wu Fan,Liu Wei
The objective of this study was to construct the S-scheme Bi 2 WO 6 / α- Bi 2 O 3 heterojunctions with high enhanced visible-light photocatalytic performance. The composites loaded various Bi 2 WO 6 mass ratios were prepared by a ball grinding method. The characterization and reaction mechanism of photocatalysts were explored in detail. Remarkably, the results demonstrated that the Bi 2 WO 6 / α- Bi 2 O 3 presented an outstandingly superior performance for photodegradation of nitrobenzene. Among them, the 10%Bi 2 WO 6 / α- Bi 2 O 3 possessed the best photocatalytic property, and it could reach up to 95.7% in 50 min with the top rate constant of 0.06178 min −1 , which was 4.3 and 3.6 times that of bare Bi 2 O 3 and Bi 2 WO 6 , respectively. Simultaneously, the Bi 2 WO 6 / α- Bi 2 O 3 was well stable after five cycling experiments. The efficiently improved photocatalytic performance was primarily attributed to the formation of S-scheme structure between Bi 2 WO 6 and α- Bi 2 O 3 , which enhanced the conspicuous separating efficiency of photogenerated carriers. The present study not only offers a method to solve the unsatisfactory activity of Bi 2 O 3 , but also provides some insights into the design of other novel S-scheme composites with great potential application in clean energy and environmental remediation. Graphical abstract The efficiently improved photocatalytic performance was primarily attributed to the formation of S-scheme structure between Bi 2 WO 6 and α- Bi 2 O 3 , which enhanced the conspicuous separating efficiency of photogenerated carriers.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 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）