DESALINATION
·
2025
·
IF 9.8
Na Yang,Xu Guo,Jing Yu,Hongsen Zhang,Rumin Li,Lele Wang,Qi Liu,Jun Wang
The effective removal of radioactive Sr 2+ and Cs + ions from wastewater is crucial for environmental remediation. Herein, a novel solar-enhanced adsorption platform based on a CoS 2 /MoS 2 /P-MXene/C composite aerogel has been developed that can efficiently remove Sr 2+ and Cs + ions. The constructed CoS 2 /MoS 2 heterointerface provides abundant active regions, while the hierarchical porous structure of the aerogel promotes the rapid transfer of ions and water molecules. In particular, the superior photothermal conversion ability of the CoS 2 /MoS 2 /P-MXene/C makes it capable of capturing solar energy for local heating effect, thereby increasing ion diffusion and accelerating mass transfer. This photothermal feature can greatly enhance the adsorption kinetics through the evaporation of the solution and the ion concentration at adsorption sites. The equilibrium of both Sr 2+ and Cs + was reached within 1 h under one-sun illumination. The measured maximum adsorption capacities were 98.7 and 150.6 mg/g for Sr 2+ and Cs + ions, respectively. In addition, it has excellent selectivity and recyclability as well as high performance in high-salinity solution. The CoS 2 /MoS 2 /P-MXene/C also shows promising potential in the fields of solar-driven seawater desalination and purification of wastewater containing dyes due to the multi-functionality. This work not only engineers an efficient adsorbent for treating nuclear wastewater, but also presents a generic design strategy for multifunctional adsorption system enhanced by external fields for environmental applications.
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2019
·
IF 10.159
Jia-Kai Chen,Ju-Ping Ma,Shao-Qiang Guo,Ya-Meng Chen,Qing Zhao,Bin-Bin Zhang,Zhi-Yong Li,Yang Zhou,Jingshan Hou,Yoshihiro Kuroiwa,Chikako Moriyoshi,Osman M. Bakr,Junying Zhang,Hong-Tao Sun
Cesium lead halide perovskite nanocrystals (NCs) have emerged as promising luminescent materials for a range of applications. However, the creation of highly luminescent violet-emitting CsPbCl3 NCs mostly relies on doping of a limited number of small-sized metal ions or post-synthetic surface treatment of NCs. Alkaline-earth (AE) metals (e.g., Ca2+, Sr2+, and Ba2+) have been proposed to be able to substitute Pb2+ in halide perovskites, yet it remains incompletely understood whether AE metal ions can be incorporated into the perovskite lattice or can be merely situated at the surface. Here, we explore the possibility of using AE metal ions for the suppression of the formation of trap centers, which leads us to develop a one-pot synthetic passivation strategy to boost the violet-emitting efficiency of CsPbCl3 NCs through the creation of a Ca2+/Sr2+ involved passivation layer. The photoluminescence quantum yield of violet emission reaches 77.1% by incorporating an optimal amount of Ca2+. A wide range of optical and structural characterizations, coupled with first-principles calculations, aid in clarifying the underlying mechanism for the AE-metal-dependent passivation of CsPbCl3 NCs. Specifically, based on the experimental and theoretical results, a model is proposed for the observed abnormal incorporation phenomenon of AE2+ ions in NCs (i.e., Ba2+ can be incorporated into the core of NCs, Ca2+/Sr2+ can only be at/near the surface, while Mg2+ can neither be in the core nor at the surface). We believe that the knowledge gained here may not only offer a new perspective to obtain high-efficiency violet-emitting perovskite NCs through a one-pot synthetic passivation but can also help elucidate the functions that AE2+ ions play in the optimization of perovskite optoelectronic devices.
研究领域:
材料科学
·
纳米技术
·
光电
·
物理化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Fan Xu,Xiaobo Kong,Wenzhi Wang,Fangying Juan,Mingxu Wang,Haoming Wei,Jinkai Li,Bingqiang Cao
Luminescent CsPbBr3 quantum dots (QDs) with adjustable size and bandgap were grown by controlling the synthesis temperature in this paper. As the synthesis temperature increases, the QD size becomes larger and then smaller. The corresponding absorption and steady-state photoluminescence spectrum indicate that the QD band gap becomes smaller and then larger, which is a typical quantum confinement effect . Time-resolved photoluminescence spectrum and femtosecond transient absorption spectrum (fs-TAS) show that the non-radiative recombination probability of photocarriers in small QDs is small it has few defects, indicating that the ligand molecules adsorbed on the surface of QDs effectively passivate the surface defects of CsPbBr3. Finally, the hot-phonon bottleneck effect of CsPbBr3 QDs is revealed by the kinetic curves fitting of fs-TAS and the cooling kinetic process of hot carriers is also discussed in detail. This work provides new insights on size-dependent photophysical properties of CsPbBr 3 QDs.
研究领域:
纳米材料科学
·
光物理学
·
半导体材料
·
凝聚态物理
·
光学功能材料
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Yanhua Wu,Yudi Wang,Jialong Duan,Xiya Yang,Jihua Zhang,Liming Liu,Qunwei Tang
The interaction between solvent molecules and lead halides in precursor solution is important in controlling perovskite film morphology and crystallization process , which determines the photovoltaic performances of solar cells. Herein, we demonstrate two organic solvent molecules, acetonitrile (ACN) and N -methyl-2-pyrrolidone (NMP) with adverse coordinating capacity to Pb 2+ center, as precursor additives to control the interaction between dimethyl formamide (DMF) and PbBr 2 and therefore the crystallization process of CsPbBr 3 films. By carefully varying the concentration of additives (ACN and NMP) in DMF solutions, the final perovskite films with markedly enlarged grains are obtained in both scenarios owing to the tuned bonding strength of PbBr 2 -DMF complexes and grain growth dynamics. Upon assembling into all-inorganic CsPbBr 3 perovskite solar cells, the optimized power conversion efficiencies of 9.22% and 9.53% are obtained for ACN- and NMP-containing devices, which are much higher than that of control device with average 7.38%-efficiency. More importantly, the optimal device free of encapsulation exhibits excellent stability under persistent attack at 40 °C and 90% relative humidity over 30 days. The improved perovskite film quality and device performances may pave the way for full-bromine perovskite solar cells in the future.
研究领域:
材料科学
·
太阳能
·
化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yi Lu,Zongze Li,Deqi Fan,Xueling Xu,Haolan Xu,Xiaofei Yang
The escalating contamination of seawater with radioactive cesium ions (Cs + ) poses severe environmental and health challenges, requiring remediation strategies that are both efficient and sustainable. However, current approaches often suffer from limited selectivity, low adsorption capacity, and poor adaptability in complex ionic environments. Herein, a multifunctional Li + − intercalated vermiculite−based photothermal aerogel evaporator is designed to synergistically couple interfacial solar evaporation (ISE) with highly selective Cs + capture. Solar-driven interfacial evaporation increases the local chemical potential of hydrated ions, while the negatively charged vermiculite nanochannels electrostatically facilitate Cs + desolvation and intercalation, enabling active ion pumping instead of passive adsorption. Consequently, the Li-V@CNTs aerogel exhibits an excellent evaporation rate of 3.33 kg·m −2 ·h −1 under 1 sun illumination, exceeding typical cellulose or graphene oxide systems (≈2.2–2.8 kg·m −2 ·h −1 ). As a Cs + sorbent, it achieves capacities up to 450 mg·g −1 in Cs + -spiked seawater, outperforming zeolite A (≈51 mg·g −1 ) and representative Zn-based metal-organic frameworks (≈221 mg·g −1 ). Integrated into a sunflower-inspired solar-tracking device, the aerogel evaporator delivers clean-water yield and Cs + removal from real seawater. Fabricated from vermiculite and bacterial cellulose via a simple, low-temperature process (estimated material cost ≈US$1.5 m −2 ) and operated solely by solar energy without secondary pollution, this ion-pumping platform offers a scalable platform with strong potential for sustainable radioactive seawater remediation.
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2021
·Vol. 13
·期 21
·9659-9667
·
IF 7.79
Jingkun Xu,Shiming Guo,Junfeng Qu,Shuhong Xu,Chunlei Wang,Dayan Ban,Yiping Cui
All-inorganic cesium lead halide perovskite nanocrystals (NCs) are quite promising materials for emission-based applications. However, the intrinsic toxicity of lead, as well as the weak stability, remains to be resolved. Exploring more and more types of lead-free NCs with high photoluminescence quantum yields (PLQYs) and high stability is a fundamental task. This work gave the first example of copper doped cesium halide (Cu:CsX, X = Br, Cl/Br, Br/I) NCs with good stability and high PLQYs (∼31.2%), which could act as a new member of the lead-free NC family. A simple single-step ultrasonic method was applied for the synthesis of environmentally friendly Cu:CsX NCs. By varying the halide composition, the emission wavelength of Cu:CsX can be shifted within 450–505 nm. The as-prepared NCs show highly uniform size and excellent stability. Finally, UV pumped light-emitting diodes are demonstrated by using Cu:CsX NCs as a color conversion layer.
研究领域:
材料科学
·
纳米技术
·
光电技术
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2025
·Vol. 54
·期 30
·11601-11606
·
IF 3.3
Guansong Zheng,Wang Zhao,Xiaoyu Wu,Hongshan Wang,Yinxia Du,Juanjuan Lu,Xiao-dong Zhou,Junjie Li
Chalcohalides, combining the structural and property advantages of chalcogenides and halides, have been demonstrated to be a promising system for the design of advanced photoelectric functional materials. Herein, a new chalcohalide compound, Cs9Si8Se20Cl, has been rationally designed by introducing a nonlinear optical (NLO)-active [Si4Se10] T2-supertetrahedral unit into a halide system and synthesized experimentally by the flux method with CsCl as the flux. The compound is composed of [CsSe7Cl] polyhedral, [CsSe6] octahedral, and [Si4Se10] T2-supertetrahedral units. To the best of our knowledge, the [CsSe7Cl] mixed anionic unit appears for the first time in the compound, and the rare [Si4Se10] T2-supertetrahedral unit has been demonstrated to be a potential NLO-active unit for the design of infrared NLO materials with balanced optical properties. The theoretical calculations uncovered that the strong orbital hybridization between Si-3p, Se-4p and Cl-3p orbitals results in a wide band gap of 3.075 eV in the title compound. The results enrich the structural diversity of chalcohalide compounds and provide valuable insights into the design of wide band gap selenides.
研究领域:
材料化学
·
无机化学
·
光学材料
·
固态化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Horizons
·
2023
·Vol. 11
·期 5
·1294-1304
·
IF 13.3
Xu Li,Bibo Lou,Xu Chen,Meng Wang,Huifang Jiang,Shuailing Lin,Zhuangzhuang Ma,Mochen Jia,Yanbing Han,Yongtao Tian,Di Wu,Wen Xu,Xinjian Li,Chonggeng Ma,Zhifeng Shi
Lead halide perovskite nanocrystals (NCs) are highly promising for backlighting display applications due to their high photoluminescence quantum yields (PLQYs) and wide color gamut values. However, the practical applications of blue emitters are limited due to the toxicity of lead, unstable structure, and unsatisfactory PLQY. Herein, we report the successful synthesis of divalent europium-based perovskite CsEuBr3 NCs using a modified hot injection method. By optimizing the reaction conditions, the CsEuBr3 NCs display a deep-blue emission at 443 nm with a full width at half maximum (FWHM) of 28.5 nm, a color purity of 99.61%, and a record high PLQY of 93.51% for deep-blue narrow-band emissive lead-free perovskite NCs as far as we know. The emission mechanism of CsEuBr3 NCs is proved through first-principles calculations and spectral analysis. Notably, the CsEuBr3 NCs exhibit remarkable stability when exposed to high temperature, UV irradiation, and long-term sealed storage. The incorporation of CsEuBr3 NCs into polydimethylsiloxane (PDMS) serving as a converter is utilized for white light-emitting devices (WLEDs). WLEDs for backlight displays achieves a wide color gamut of 127.1% of the National Television System Committee standard (NTSC), 94.9% coverage of the ITU-R Recommendation BT.2020 (Rec.2020), and their half-lifetime is up to 1677 h, providing a promising pathway for highly efficient, environment-friendly and practical liquid crystal display backlights.
研究领域:
材料科学
·
光电技术
·
显示技术
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2026
·
IF 3.9
Wang Aqin,Zhou Zhengbing,Hang Zhou,Lyu Zhengbing,Yang Jingchun,Zhang Lu,Wang Meng,Liu Wei,Zou Liqiang,Yu Jun
Direct oral intervention of spleen aminopeptide (SA) would be limited because of its varied swelling and release rate in different pH environments of digestive fluids. Herein, pH-responsive hydrogel microspheres (3.67 ± 0.04 mm) with positive SA-loaded chitosan (Cs) core and negative alginate (ALG) shell were prepared. Entrapment efficiency was 76.22% and loading rate of SA was 35.17%. Besides the hydrogen bonding, a strong core/shell structure was constructed by forming imine bond via the Schiff base reaction of amino group in Cs with ketone group on SA. In vitro simulated digestion showed that the swelling rate of microspheres was 192.8% (pH 1.2), 2481.5% (pH 6.8), and 1144.3% (pH 7.4). The release rate of SA was 0.9% in simulated gastric fluid for 2 h, 6.0% in simulated intestinal fluid for 2 h and continuous release in simulated colonic fluid for 24 h with a cumulative release rate of 92.4%. After treatment, the observation group exhibited increasing levels of CD3 + , CD4 + , CD4 + /CD8 + , IgA, IgG and IgM. Total effective rate in observation group was 96.15%, being higher than that in control group (84.31%). This work provided a valuable reference for preparing drug-loaded hydrogels to improve the recurrent respiratory infection in children.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Jiawei Sun,Muhammad Usman Farid,Wenlong Xi,Gang Lu,Min Wei Boey,Sai Kishore Ravi,Patrick H.-L. Sit,Alicia Kyoungjin An
Photothermal-catalytic (PTC) process is a promising way to produce freshwater and clean hydrogen by integrating solar-driven desalination and water splitting. However, efficient solar spectrum utilization coupled with effective mass and thermal management poses key challenges in developing multifunctional PTC systems. Here, a highly stable hydrogel membrane (CdS/MX-HM) that incorporates MXene and in-situ generated CdS as the PTC materials into a customized vacuum membrane distillation (VMD) setup is demonstrated. The CdS/MXene composites utilize the full solar spectrum, with MXene contributing to photothermal ability and serving as a co-catalyst to enhance photocatalytic performance, which are effectively integrated into the membrane system. These functional materials are immobilized within the hydrophilic PVA/chitosan hydrogel layer, which creates a supramolecular network that provides excellent stability and protection while offering an interface for PTC processes. Supported by the hydrophobic PTFE membrane substrate, the integrated system enables fast gas transfer to the permeate, completing the dual-function design. Through systematic optimization of membrane structure and operational parameters, the PTC-VMD system achieves a water flux of 1.63 kg m − 2 h − ¹ and a hydrogen production rate of 3099 µmol m − 2 h −1 under one sun irradiation, demonstrating its potential as a sustainable solution for the water-energy nexus challenge.
✓ 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）