Journal of Physical Chemistry Letters
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2025
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IF 4.6
Deyu Li,Mingming Zhang,Yutong Zhang,Yi Han,Lei Wang,Xinfeng Liu,Jun Xing
Recently, two-dimensional (2D) halide perovskites achieved impressive performance as broadband white-light emitters, which originate from exciton self-trapping in the distorted lattice. So far, it is still a challenge to modulate the exciton self-trapping process as well as tune the white light-emitting properties of 2D perovskites. Here we develop molecular alloying engineering to modulate the exciton self-trapping rate and depth in halide perovskites. We present a series of 2D perovskite alloys by incorporating molecules A with small steric hindrance and Ai with large steric hindrance, which determine the structural distortion of the perovskite. The higher proportion of Ai induces larger structural distortion of the perovskite and leads to a higher rate of exciton self-trapping and deeper exciton self-trapping depth. The designed perovskite alloys exhibit tunable broadband emission, covering from cool- to warm-white light. Our findings achieve exciton modulation and provide a general method for tailoring the optical properties of perovskites.
研究领域:
材料科学
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光电子学
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固体物理学
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纳米技术
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化学工程
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
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2025
·
IF 9.5
Guangyao Zhao,Zhehui Zhao,Sixing Zhang,Jiakang Yao,Na Cheng,Zhen Li,Yu Han,Xiaotao Zhang
Thermochemical energy storage technology based on the Ca(OH)₂/CaO dehydration-hydration reaction is considered as a promising strategy for addressing the transient storage of renewable energy due to high thermal storage density, long cycle characteristics, and safety. However, this technology suffers from drawbacks like agglomeration and sintering at high temperatures, along with poor cycling stability. In this study, the "dynamic" doping of Ca(OH)₂ with C₃N₄ was introduced to optimize the microstructure of particles, which enhanced the thermal performance, elevated conversion rate, and improved cycling stability, without reducing thermal storage density. In-depth characterizations revealed that C₃N₄ transformed Ca(OH)₂ from a flake-like structure to uniform spherical particles, approximately 10 μm in size. In particular, when the doping amount reached 30 wt%, the thermal storage density increased by 11.10% in contrast to Pure Ca(OH)₂, the peak reaction temperature decreased by 13.98°C, and the conversion rate improved to 91.22%. Simultaneously, the material exhibited excellent anti-caking properties, maintaining a thermal storage density of 776.46 J/g after 20 cycles, representing a 27% augmentation compared to the unmodified sample. The microscale effect of the material was retained. In summary, this outcome showcases outstanding comprehensive properties, taking thermochemical energy storage materials further into practical scenarios.
研究领域:
储能技术
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材料科学
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热能工程
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可再生能源
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产品关联
DOI
高影响因子
RSC Advances
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2016
·Vol. 6
·期 114
·113671-113680
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IF 3.289
Yan Wang,Yi Ren,Jingjing Luo,Qiaoyan Hao,Biao Li,Zhan Gao,Yiwei Hu,Dan Lin,Kaibin Tang
Intercalation and delamination of two-dimensional solids are effective steps for exploiting their unique properties. Herein, the chemical exfoliation of the n-alcohol derivative of H2CaTa2O7 results in a colloidal suspension of monolayer nanosheets. Microscopic observation confirms the delamination of the parent perovskite. The thickness of the nanosheet obtained is 1.2 ± 0.1 nm. The dimensionally tailored H2CaTa2O7 nanosheets exhibit exceptional uptake of 300 mg g−1 Pb(II) ions at pH 5.0, and adsorption equilibrium is achieved in a short time span of 30 seconds. Experimental studies demonstrate that the treatment capacity for Pb(II) ions in simulated drinking water is 1.67 × 105 kg water per kg adsorbent. Desorption of Pb(II) ions is efficiently realized using 1 M HCl, which greatly reduces the cost associated with the regeneration. The large surface area of the ultrathin nanosheets and their nonporous structure facilitate the uptake of Pb(II) ions.
研究领域:
环境科学
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材料科学
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纳米技术
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水处理
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吸附化学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2024
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IF 7.1
Wen-kui Li,Xiang-yun Fu,Yu-zhen Wu,Yong-hong Wang,Jing Zhang,Zhi-qing Ma
Green tablets for grain storage are urgently required, and intelligently controlled release of active ingredients based on functional nanomaterials is a promising strategy for the preparation of green and high-efficiency tablets. In this work, a polydopamine-doped nano-CaCO3 (nanoPCaCO3) with a diameter of 60–88 nm was prepared by a gas diffusion pore-opening strategy. The porous nanoPCaCO3 exhibited superior encapsulation capacity toward phenolic and ketone compounds based on pore filling, hydrogen bonding, and π–π interactions. After functional disintegrants and excipient addition, two kinds of nanoPCaCO3 tablets containing carvacrol (18.0%) and carvone (16.7%) were prepared, which had a novel humidity-controlled release mode based on the humidity-responsive reaction between nanoPCaCO3 and hygroscopic solid acids. At low relative humidity (RH), grain storage pests were hard to survive, and the release rates of active ingredients in the tablets were slow; at high RH, grain storage pests grew well, and the release rates of active ingredients were accelerated correspondingly. As a result, the 7 day cumulative release ratios of carvacrol and carvone from the tablets at 75% RH were approximately 3 times that at 40% RH. Besides, the tablets exhibited desirable fumigation activity; at 75% RH, the 19 day inhibition ratio against Aspergillus flavus attained 73.7%, and the 7 day fumigation mortality against Sitophilus zeamais reached 92.7%. The tablets can be efficiently used for grain storage pest control, and the porous nanoPCaCO3-supported humidity-controlled release mode can be extended for more high efficiency and functional medicament development.
研究领域:
材料科学
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农业科学
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生物技术
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2024
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IF 18.5
Jiaqi Zhang,Jianan Wang,Qishen Zhou,He Zhu,Yongyan Pan,Chenyang Shi,Sanwan Liu,Zheng Zhou,Huande Sun,Yong Cai,Rui Chen,Fumeng Ren,Zhengjing Zhao,Zihe Cai,Xiaojun Qin,Zhiguo Zhao,Zhichun Yang,Zonghao Liu,Wei Chen
All-perovskite tandem solar cells (TSCs) hold a great promise to break the Shockley-Queisser (S-Q) efficiency limit of single-junction solar cells. However, the inferior performance of the tin-lead (Sn–Pb) mixed perovskites based narrow-bandgap bottom subcells largely limits the development of all-perovskite TSCs due to the serious defects assisted non-radiative charge recombination loss, especially at the perovskite/electron charge transport layer (ETL) interface. Herein, a dual-source defect managing strategy is demonstrated to modify the top surface of Sn–Pb mixed perovskites. Specifically, ethylenediammonium diiodide (EDAI 2 ) and (3-mercaptopropyl) trimethoxysilane (MPTS) are simultaneously introduced to passivate the organic cations and metal cations related defects, respectively. The strong interactions between the passivators and Sn–Pb perovskite result in effectively reduced non-radiative carrier recombination, obviously suppressed Sn 2+ oxidation and accelerated carrier transportation at the perovskite/ETL interface. Ultimately, a champion efficiency of 22.7% for single-junction Sn–Pb solar cells and an impressive efficiency of 28.26% for the all-perovskite TSCs are achieved based on the dual-source defect managing strategy.
研究领域:
材料科学
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能源科学
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光伏技术
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 25
·46717-46727
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IF 5.6
Yufeng Deng,Peng Liu,Han Li,Ziyu Liu,Shuguang Chen,Jiangrong Kong,Xianfeng Yang
Perovskite-type SrFeO 3- δ (SF) is a promising cathode material for solid oxide fuel cells (SOFCs) owing to its high ionic and electronic conductivities. Moreover, it is necessary to enhance the electrocatalytic activity for oxygen reduction reaction (ORR) in the intermediate operating-temperature range. In this study, the tunable synthesis of Ce, Ni dual-doped SF-based materials enables the in situ exsolution of CeO 2 and NiO nanoparticles, thereby inducing the transformation from a simple tetragonal perovskite into a rod-like Ruddlesden–Popper (RP) phase. Compared to SF, the multi-catalyst with a nominal composition of Sr 0.9 Ce 0.1 Fe 0.8 Ni 0.2 O 3– δ exhibits improved ORR activity with only 37 % polarization resistance at 800 °C. Theoretical calculation reveals that the exposure of CeO 2 (220) and NiO (111) crystal planes facilitates the oxygen adsorption and that the formation of the RP phase increases the oxygen vacancy concentration in the lattice and promotes the oxygen dissociation.
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DOI
高影响因子
Materialia
·
2023
·
IF 3.4
Dzi Shing Aaron Lau,Herng Ee Chieng,Chenmin Wang,Zhaoyang Li,Xiaoting Zhang,Dick Ho Kiu Chow,Ling Qin,William Weijia Lu
Calcium sulfate/phosphate cement (CSPC) is a calcium-based bioactive material which is degradable and used to repair bone defects, however, it is not recommended for patients with poor bone health due to the mismatch of time of bone regeneration and cement degradation. Previous studies suggested the addition of Magnesium (Mg) is a possible solution to enhance the performance of CSPC as Mg ions are beneficial to osteogenesis. However, the impact on bone healing induced by Mg is subtle since Mg 2+ ions regulate both osteoblastic and osteoclastic activities. This study examined the healing effect of pure Mg-enriched CSPC (Mg-CSPC) and magnesium chloride (MgCl 2 ) enriched CSPC (MC-CSPC). Mg-CSPC showed sustained release of Mg 2+ whereas MC-CSPC exhibited spike release of Mg 2+ and led to a higher rate of degradation. In vivo study in ovariectomized (OVX) rat model indicated a longer time of degradation in Mg-CSPC, which fully degraded at postoperative week 8. Mg-CSPC contained interconnective pores which allowed cell migration from the outer layers to the core of the cement and improved osteoinduction. On the other hand, MC-CSPC was fully degraded in less than 4 weeks after surgery and replaced by newly formed bone. In this study, MC-CSPC demonstrated a significantly higher rate of bone regeneration than Mg-CSPC and the optimum rate of bone regeneration was between weeks 4 to 7 after cementoplasty. Both histological and quantitative micro-CT analysis suggested MC-CSPC produced a higher quality of new bones and positively affected the surrounding bones. Taken together, this study suggests a fast release of Mg-contained scaffold is preferable for bone repair and the healing effect is continued even after complete degradation.
研究领域:
生物医学工程
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材料科学
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骨科
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DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2025
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IF 5.6
Dejie Ge,Debao Ren,Shuailin He,Xuan Luo,Wenjun Qin,Cheng Zhang
Membrane calcification, characterized by an abnormal calcium mineral covering cell membrane, can cause aggravated hypoxia and even cell death in numerous cell lines, emerging as a new strategy for tumor therapy. Herein, based on the distinctive biological impact of cell membrane calcification, we constructed a multi-functional nanoplatform of hollow manganese dioxide (MnO 2 ) encapsulated with calcium carbonate (CaCO 3 ) and a hypoxia-activated anticancer prodrug tirapazamine (TPZ). After modification with hyaluronic acid (HA), the prepared nanoparticles HMn@CaT exhibits excellent tumor targeting and microenvironment responsiveness. Once enriched in tumor tissue, the low pH would induce the disintegration of CaCO 3 and MnO 2 to release Ca 2+ and Mn 4+ , which are utilized for calcium deposition and glutathione consumption, respectively. In the presence of tumor cells rich in hydrogen peroxide, the reduced Mn 2+ will generate highly cytotoxic ·OH through Fenton-like reactions. Meanwhile, aggravated hypoxia within tumor cells caused by membrane calcification also activates TPZ cytotoxicity, which can produce highly active and cytotoxic benzotriazinyl (BTZ) radical, leading to cell death and anti-tumor effect. The synergy of multiple effects enables the carefully designed platform of HMn@CaT to demonstrate excellent tumor inhibition both in vitro and in vivo , hence establishing a novel approach for tumor treatment.
研究领域:
肿瘤学
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纳米医学
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生物材料
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转化医学
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自由基生物学
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药物递送系统
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
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IF 22.1
Yuanli Li,Chunqiang Zhuang,Shi Qiu,Junfeng Gao,Quan Zhou,Zaicheng Sun,Zhenhui Kang,Xiaodong Han
Metal halide perovskites with broad optical absorption and long carrier lifetime are considered as ideal photocatalysts. However, their poor stability in water greatly impedes their application in photocatalytic H 2 evolution because they lose their crystalline structure in water. Herein, we proclaim a new class of photocatalysts: all-inorganic Cs-Cu-Cl perovskite quantum dots (QDs). It exhibits a high photocatalytic hydrogen production rate of ∼ 3.1 mmol/g/h without any cocatalyst under AM 1.5-G solar irradiation (100 mW/cm 2 ). Especially, it remains the high activity for up to 330 h without apparent deterioration of the hydrogen production rate. Density functional theory (DFT) calculations reveal that the Cu site works as the electron and proton absorption sites as the H 2 production active center. To our best knowledge, there is no report of metal halide perovskites as water-stable photocatalysts. This work opens an innovative way for guiding the exploration of metal halide perovskites photocatalysts for stable photocatalytic H 2 evolution.
研究领域:
材料科学
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能源科学
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化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Xuedong He,Fei Tian,Huawei Song,Chengxin Wang
Multivalent metal batteries serve as crucial complements to lithium-ion batteries. Nevertheless, fluorinated anions designed for energy storage at high voltages readily passivate the metal anodes in common ester electrolytes, particularly for Ca-metal batteries (CMBs). Ca plating/stripping can hardly occur continuously in common fluorinated calcium salt ester electrolytes due to severe corrosion at room temperature. To address the challenging issue, a uniform artificial interface of calcium fluoride nitride nanocrystals (Ca 2 NF) and amorphous organic species is engineered in the top of Ca-metal electrodes. The compact inorganic/organic hybrid solid electrolyte interphase (SEI) layer avoided the direct reaction of Ca-metal and corrosive fluorinated anions, effectively preventing the continuous passivation of Ca-metal and expediting the diffusion kinetics of calcium ions at the interface. Therefore, for the first time, stable Ca plating/stripping at 0.005 mA cm −2 over 420 h in a commercial fluorinated calcium salt ester electrolyte is achieved for the Ca-metal electrode with the protective SEI, far superior to that of mere hours for the pristine Ca-metal. The enhanced reversibility is also substantiated in Ca-metal full batteries with biomass-derived carbon cathode, delivering stable cycling performance. This work underscores the importance of interface and interphase engineering as an effective avenue for advancing the development of CMBs.
研究领域:
电化学
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能源材料
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界面科学
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储能技术
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无机非金属材料
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应用化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2024
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IF 8
Yang-Yang Hao,Ming-Xiu Xiao,Guo-Cui Mao,Jin-Peng Wang,Zhan-Kuo Guo,Bao-Xia Dong,Yun-Lei Teng
Capturing CO 2 using clamshell/eggshell-derived CaO adsorbent can not only reduce carbon emissions but also alleviate the impact of trash on the environment. However, organic acid was usually used, high-temperature calcination was often performed, and CO 2 was inevitably released during preparing CaO adsorbents from shell wastes. In this work, CaO-based CO 2 adsorbent was greenly prepared by calcium-induced hydrogenation of clamshell and eggshell wastes in one pot at room/moderate temperature. CO 2 adsorption experiments were performed in a thermogravimetric analyzer (TGA). The adsorption performance of the adsorbents obtained from the mechanochemical reaction (BM-C/E-CaO) was superior to that of the adsorbents obtained from the thermochemical reaction (Cal-C/E-CaO). The CO 2 adsorption capacity of BM-C-CaO at 650 °C is up to 36.82 wt%, but the adsorption decay rate of the sample after 20 carbonation/calcination cycles is only 30.17%. This study offers an alternative energy-saving method for greenly preparing CaO-based adsorbent from shell wastes.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Can Chen,Hari Bala,Shujuan Yao,Bowen Zhang,Nian Sha,Xiangli An,Wei Zhang,Diandian Chen
The quality of perovskite film seriously affects the performance of organic-inorganic hybrid halide perovskite solar cells . In this paper, we demonstrate an anti-solvent treatment by controlling the perovskite recrystallize to enhance the quality of perovskite film and photophysical properties, including crystallinity, high coverage and high absorption. The fabricated carbon-based perovskite solar cells show PCE improvement from 6.82% to 10.81% with less hysteresis, and remained 90% of the original value after 93 days in the air environment. Our work provides a way to prepare simple and stable perovskite devices with high stability and low cost.
研究领域:
材料科学
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可再生能源
·
光伏技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）