SOLAR ENERGY
·
2021
·
IF 5.742
Honggang Xie,Jiannan Xu,Can Gao,Jiejing Zhang,Chunxiao Gao,Xizhe Liu
CsPbI 3 triggers strong interest in the photovoltaic community for their promising photoelectric property and nonvolatility. However, CsPbI 3 layers with a-phase crystal structure are difficult for preparation, and these layers easily degrade to non-photoactive δ-phase at room temperature. Tuning the composition of precursor solutions is an important method for improving the properties of CsPbI 3 layers. Herein, we prepare inorganic a-CsPbI 3 perovskite solar cells using lead acetate as the lead source, which is different from conventional precursors with lead iodide as the lead source. The lead acetate precursor needs neither incorporating hydrogen iodide nor preparing PbI 2 complex, and it is shown to enlarge the grain size, improve the crystallinity and reduce the trap density of CsPbI 3 layers. By cooperating the lead acetate precursor with EDAI 2 additive, the power conversion efficiency (PCE) of devices increases from 9.2% to 12.9% and the photo-stability of these devices is improved simultaneously.
研究领域:
材料科学
·
光伏技术
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Qian Zhao,Changzhong Liao,Guangyuan Chen,Ruixi Liu,Zeru Wang,Anhu Xu,Shiyin Ji,Kaimin Shih,Lin Zhu,Tao Duan
Effective capture of radioactive iodine is highly desirable for decontamination purposes in spent fuel reprocessing. Cu-based adsorbents with a low cost and high chemical affinity for I2 molecules act as a decent candidate for iodine elimination, but the low utilization and stability remain a significant challenge. Herein, a facile in situ confined synthesis strategy is developed to design and synthesize a copper-encapsulated flaky silicalite-1 (Cu@FSL-1) zeolite with a thickness of ≤300 nm. The maximum iodine uptake capacity of Cu@FSL-1 can reach 625 mg g–1 within 45 min, which is 2 times higher than that of a commercial silver-exchanged zeolite even after nitric acid and NOX treatment. The Cu nanoparticles (NPs) confined within the zeolite exert superior iodine adsorption and immobilization properties as well as high stability and fast adsorption kinetics endowed by the all-silica zeolite matrix. This study provides new insight into the design and controlled synthesis of zeolite-confined metal adsorbents for efficient iodine capture from gaseous radioactive streams.
研究领域:
材料科学
·
环境科学
·
核能工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Jing Li,Ruoqi Wang,Dandan Zhang,Zhen Su,Heping Li,Youwei Yan
To resolve the worldwide water scarcity crises, there is an urgent need to develop highly efficient adsorbent for water purification. For the first time, Copper Iodide (CuI), homogeneously coating on carbon cloth (CuI@CC), is fabricated and investigated as a highly efficient, self-cleaning and easy-recycling adsorbent toward cationic organic dyes with good repeatability. Using the carbon cloth as a substrate, CuI is fabricated successfully via electroplating deposition followed by iodination procedure at ambient temperature. By combining the flexibility from the carbon fiber with the splendid adsorptive ability of the CuI coating, the CuI@CC is not only free-standing and flexible but also a highly efficient adsorbent. Notably, the CuI coating is also self-cleaning to decompose adsorbed organics through photocatalysis , which guarantees its great repeatability to a great extent. By installing the CuI@CC on the designed filtration device, the procedure of recycling and application is convenient and can avoid secondary pollution of water as well. This newly developed CuI coating is expected to be a novel adsorbent as a promising solution to the water crisis.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Nanoscale
·
2023
·Vol. 16
·期 3
·1102-1114
·
IF 6.7
Song He,Xingyu Yu,Juanjuan Wang,WenKang Zhong,Baochang Cheng,Jie Zhao
Emerging resistive switching devices hold the potential to realize densely packed passive nanocrossbar arrays, suitable for deployment as random access memory devices (ReRAMs) in both embedded and high-capacity storage applications. In this study, we have engineered ReRAMs comprising ITO/(UVO-treated) amorphous ZnO (a-ZnO)/MAPbI3/Ag which effectively mitigate cross-talk currents without additional components. Significantly, we successfully executed a comprehensive set of 12 distinct 2-input sequential logic functions in a single halide perovskite ReRAM unit for the first time. Furthermore, these logic functions are devoid of any dependency on external light sources, entail merely 1 or 2 logic steps, and showcase symmetrical operability. A superior resistive switching behavior was achieved by harmonizing the charge transport within the bulk MAPbI3 and the tunneling barriers at the interfaces. The outcomes indicate progress in mitigating cross-talk and executing multiple logic functions within a single halide perovskite ReRAM unit, offering a new perspective for the advancement of halide perovskite ReRAMs.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 28
·23134-23140
·
IF 3.289
Zhiqiao He,Yan Yu,Da Wang,Juntao Tang,Jianmeng Chen,Shuang Song
Iodine-doped titanium dioxide nanosheets with high exposed {001} facets (IFTO) were synthesized by a two-step hydrothermal treatment followed by calcination at 350 °C. The photocatalyst samples were characterized by X-ray diffractometry, transmission electron microscopy, field emission scanning electron microscopy, ultraviolet-visible diffuse reflectance spectra, Brunauer–Emmett–Teller measurements and X-ray photoelectron spectroscopy. The IFTO were more active than surface-fluorinated TiO2 nanosheets or iodine-doped TiO2 nanoparticles in the gaseous reduction of CO2 with water vapor. The IFTO photocatalytic activity was repeatable over five successive cycles. Coexisting I–O–Ti and I–O–I structures in the IFTO TiO2 lattice contributed to visible light absorption and a high percentage of exposed {001} facets that enhance H2O oxidation. Surface fluorination promoted the formation of unsaturated Ti atoms, which helped reduce CO2 to CO2− and retard the recombination of photogenerated electron–hole pairs.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CONTROLLED RELEASE
·
2024
·
IF 10.5
Shuang Zhu,Chenglu Gu,Long Gao,Shuanglong Du,Duiping Feng,Zhanjun Gu
Pancreatic ductal adenocarcinoma (PDAC) has a low survival rate and limited treatment options. Concurrent chemoradiotherapy is considered beneficial to improve tumor control, but the low drug bioavailability at tumor site and the low radiation tolerance of surrounding healthy organs greatly limits its effectiveness. Lipiodol, a natural drug carrier used in clinical transarterial chemoembolization, has shown potential as a radiosensitizer due to its high Z element iodine composition. Thus, this study aims to repurpose lipiodol as a sensitizer to simultaneously enhance chemo- and radiotherapy for PDAC. To this end, a stable lipiodol emulsion (IOE) loaded with gemcitabine is designed using clinically approved surfactants. At in vivo level, IOE demonstrates better radiotherapeutic effect than existing nanoradiosensitizers and enhanced drug bioavailability over free drug, leading to significant tumor inhibition and improved survival rates under concurrent chemo-radiotherapy. This may due to the sustained drug release, homogenous spatial distribution, and long-term retention ability of IOE in solid PDAC tumor. Furthermore, to better understand the functioning mechanism of drug-loaded IOE, in vitro study is conducted to reveal the ROS- and DNA damage-related therapeutic pathways. Lastly, a comprehensive toxicity assessment also proves the good biocompatibility and safety of as-prepared IOE. This study offers a clinically feasible sensitizer for simultaneous chemoradiotherapy and holds potential for other types of cancer treatment in clinics.
研究领域:
肿瘤学
·
放射治疗学
·
药剂学
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 187
·期 1
·1-10
·
IF 5.479
Wang Ziyi,Lu Yuexiang,Pang Jiawei,Sun Jingwei,Yang Fengyi,Li Hui,Liu Yueying
The authors have studied the role of different ligands on the surfaces of silver nanoplates for regulating their analytical applications. Citrate-capped silver nanoplates are applied for the detection of chromium ions (Cr 3+ ) based on aggregation of silver nanoplates. Cr 3+ can cause aggregation through high affinity between Cr 3+ and carboxylate groups of citrates, resulting in a color change from dark yellow to purple and at last colorless. The detection limit is 8.0 nM. This system shows excellent selectivity in the presence of a variety of other metal ions. Further, silver nanoplates coupled with iodide ions are employed for the colorimetric determination of copper ions (Cu 2+ ) based on a new strategy of fusion/oxidation etching nanoplates. When Cu 2+ is introduced into this silver nanoplate system, Cu 2+ can oxidize I − to iodine (I 2 ), which can further oxidize silver to form silver iodide (AgI). Simultaneously, the solution color changes from dark yellow to colorless. The lower limit detection is 0.27 μM. This assay exhibits excellent selectivity for Cu 2+ over other environmental metal ions. It is perceived that this design concept will open up a fresh insight of simple, rapid and reliable detection of other heavy metal ions in drinking water and environmental samples.
Iodide-assisted silver nanoplates can be used for the colorimetric and visual ldetermination of Cr 3+ and Cu 2+ based on an aggregation/fusion/oxidation etching mechanism. These systems allows selective and sensitive determination of the ions in real samples.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Chang Liu,Hongjie Zheng,Yuwei Wang,Nan Xiao,Kai Yu,Hui Li,Xu Zhang,Hongcun Bai,Tianyi Ma,Jieshan Qiu
Soft carbon has been regarded as one of the most promising anode materials for potassium-ion batteries. However, the rearrangement of planar aromatics at high carbonization temperature usually yields a highly graphitized structure, which generally leads to inferior rate and cycle performance. In addition, the role of intrinsic carbon defects on potassium storage has not been well reported yet. In this work, crosslinked pitch-based soft carbon nanosheets have been synthesized through the iodination/dehydroiodination process at low temperature and carbonization with NaCl template. The iodine-treatment efficiently crosslinks the planar aromatics to three-dimensional framework by alkyl-bridged linkages, and reduces the strong π-π interaction during carbonization. This unique microstructure yields an ordered-in-disordered carbon microstructure, enlarged interlayer spacing, and abundant intrinsic defect sites. Benefited from these merits, the optimal sample displays 140% increase of reversible capacity to the pristine pitch-based carbon at 5 A g −1 . Particularly, it also presents 87.4% capacity retention after 1000 cycles at 1 A g −1 . This facile but simple strategy is expected to expand to other high-performance carbon materials and further understand the effect of intrinsic defects for potassium storage and beyond.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Alemtsehay Tesfay Reda,Dongxiang Zhang,Xiyan Xu
The search for efficient material to capture iodine from off-gas streams continues. Herein, a novel composite of lithium aluminate and melamine , abbreviated as LiAlO 2 -Mel, was synthesized and exhibited high vapor iodine capture capacity accompanied by good regeneration ability. The LiAlO 2 -Mel showed an enormous capture capacity of 1281 mg/g within 4 h towards I 2 (g) at 150 °C. The kinetics study showed that the dominant process (at 150 °C) was chemisorption via N∙∙∙I and C–NH∙∙∙I bonding mechanisms. Additionally, LiAlO 2 -Mel has a low surface area (14.6157 m 2 /g) yet produced high capacity, suggesting chemisorption played a critical role. However, physisorption was the dominant process at lower temperature values, as proved by kinetics fittings and activation energy (E a = 23.19 KJ/mol) studies. The kinetics models were validated by statistical error validity models (sum of square error, Chi-square test, and normalized standard deviation). Thermogravimetric analysis and adsorption-desorption experiments showed that the LiAlO 2 -Mel can be recovered by heat treatment (25–800 °C) in N 2 atmosphere and ethanol washout (24 h, 25 °C) of the LiAlO 2 -Mel-I. The high capture capacity, along with eco-friendly and cost-effectiveness, highlights the promising potential of LiAlO 2 -Mel for iodine capture.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2024
·
IF 3.3
Rui Sun,Junyi Wang,Haoran Liang,Shuo Li,Xiao Yang
A facile and novel N-heteroarenium iodide-catalyzed hydroalkoxylation of enamides has been described. The protocol provides easy access to N,O-acetals, which proved to be a versatile synthetic synthon. The hydrosulfonylation, hydroamination, and hydrophosphorylation products of enamide could be indirectly provided from N,O-acetals. The reaction mechanism was further investigated, which indicated that the hydroalkoxylation of enamides was driven by weak coordination between enamide and the contact ion pair of N-heteroarenium iodide.
研究领域:
有机化学
·
合成化学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2021
·Vol. 35
·期 7
·e6245
·
IF 4.105
Ruonan Ma,Zhiyin Xiao,Wei Zhong,Chunxin Lu,Zhongquan Shen,Dan Zhao,Xiaoming Liu
Cuprous halides, best described as (CuX) n (X = Cl − , Br − , and I − ) in their solid state, catalyse selective aerobic oxidation of alcohols with the assistance of both NMI ( N -methylimidazole) and TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl), and the iodide generally demonstrates the highest activity, for example, in the oxidation of 1-octanol at ambient temperature under 24 h' reaction. However, in the aerobic oxidation of benzylic alcohols, the chloride showed superiority to the iodide in that the aerobic oxidation was quantitatively completed within 3 h at ambient temperature whereas the iodide showed only about half the activity of the chloride analogue. By probing the system using electrochemistry, electric conductivity, and 1 H NMR titration, it was revealed that the surprising anomaly was due to the difference in the rate of forming active species, [Cu (NMI) 2 X(MeCN)], from the polymeric solid in a two-stage process. Substrates expansion of 11 benzylic alcohols indicated that CuCl/NMI/TEMPO system demonstrated quantitative conversion of benzylic alcohols into corresponding aldehydes within 3 h and showed great tolerance to the substituents on the phenyl ring of the substrates. Furthermore, electron-withdrawing substituent was beneficial to the oxidation and could offset the steric effect at orthro -substituent. Such a behaviour suggested that in the catalysis, increasing the acidity of the hydroxyl group (OH) of the substrates could ease the oxidation, which implied that the deprotonation via an internal pathway might be one of the rate-determining steps. Our results also showed that the anion halide participated actively in the catalysis by coordinating to Cu(I) in the active species.
研究领域:
化学
·
催化反应
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Adeel Abbas,Zhuoming Xu,Mohammad Nisar,Delong Li,Fu Li,Zhuanghao Zheng,Guangxing Liang,Ping Fan,Yue-Xing Chen
SnSe is a very strong anisotropic material; sometimes, strong anisotropy is unenviable for producing parts of thermoelectric (TE) devices. In order to study the efficient preparation of high-performance n-type polycrystalline SnSe with weak anisotropy, in this work, we combine mechanical alloying at 450 RPM for 10 h and spark plasma sintering at 773 K under 50 MPa pressure for the preparation of polycrystalline SnSe 0.95- x I x ( x = 0,0.01,0.02,0.03) samples, and investigate the TE properties. The prepared samples show very weak anisotropy. With iodine doping, increased carrier concentration is observed, in agreement with DFT calculations. A peak ZT ≈ 1.02 at 723 K is observed with I-doping of x = 0.02, which is about 225% higher than that of undoped sample with ZT ≈ 0.31 at 723 K in parallel direction, mainly attributed to the enhanced power factor and about 56% reduced thermal conductivity from 0.68 Wm −1 K −1 to 0.30 Wm −1 K −1 . TE properties in both directions are not much different, and the ratios of electrical and thermal conductivities in both directions are very close to unity.
研究领域:
材料科学
·
能源材料
·
凝聚态物理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）