Advanced Energy Materials
·
2018
·Vol. 8
·期 31
·1802346
·
IF 21.875
Jialong Duan,Yuanyuan Zhao,Xiya Yang,Yudi Wang,Benlin He,Qunwei Tang
All-inorganic cesium lead bromide (CsPbBr 3 ) perovskite solar cells have attracted enormous attention owing to their outstanding stability in comparison with organic–inorganic hybrid devices. The greatest weakness for inorganic CsPbBr 3 solar cells is their lower power conversion efficiencies, mainly arising from inferior light-absorbance range and serious charge recombination at interfaces or within perovskite films. To address this issue, the lattice doping of lanthanide ions (Ln 3+ = La 3+ , Ce 3+ , Nd 3+ , Sm 3+ , Eu 3+ , Gd 3+ , Tb 3+ , Ho 3+ , Er 3+ , Yb 3+ , and Lu 3+ ) into CsPbBr 3 films for all-inorganic solar cells free of hole-transporting materials and precious metal electrodes is presented. Arising from the enlarged grain size and prolonged carrier lifetimes upon incorporating Ln 3+ ions into perovskite lattice, the performances of these inorganic CsPbBr 3 solar cell devices are significantly enhanced, achieving a champion efficiency as high as 10.14% and an ultrahigh open-circuit voltage of 1.594 V under one sun illumination. Meanwhile, the nearly unchanged efficiency upon persistent attack by 80% RH in air atmosphere over 110 d and enhanced thermal stability at 80 °C over 60 d provide new opportunities of promoting commercialization of all-inorganic CsPbBr 3 perovskite solar cells.
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2026
·
IF 8.2
Haidong Li,Yuankun Yang,Han Song,Yi Yang,Hui Gong,Xinwen Chen,Weiguo Tu,Xuemei Luo,Yu Liu,Shu Chen
Potassium butyl xanthate (PBX) is a widely used flotation collector that can persist in tailings waters and may generate toxic by-products. In sunlit tailings ponds, sulfite (S(IV)), Cr(VI), and PBX may coexist under certain conditions, yet the impact of coupled S(IV)-Cr(VI) photochemistry on PBX attenuation remains unresolved. We quantified PBX degradation in a sunlight/S(IV)/Cr(VI) system across pH 3-10, covering tailings-water variability and pH-driven speciation. The process enabled simultaneous PBX removal and Cr(VI) detoxification, with optimum performance at mildly acidic-neutral pH. At pH 6, k obs increased from 3.9×10 -3 min -1 (sunlight) to 2.35×10 -2 min -1 (sunlight/S(IV)) and 3.38×10 -2 min -1 (sunlight/S(IV)/Cr(VI)), confirming synergy. Quenching/probe tests and time-resolved EPR implicated SO 4 •− , •OH, and Cr(V), indicating pH-dependent coupling between the sulfite radical chain and the Cr(VI)/Cr(V)/Cr(III) cycle. DFT and LC-MS showed acidic hydrolysis/self-decomposition of PBX to CS 2 at pH 3, whereas near-neutral conditions favored radical/Cr(V)-mediated oxidation with efficient Cr(VI) reduction. Outdoor natural-sunlight tests using laboratory-generated flotation wastewater prepared from raw ore collected from the mine (with spiked S(IV) and Cr(VI)) achieved 90% PBX removal within 60 min at pH = 6, T ≈ 35-36 °C and solar irradiance ≈ 750-850 W m -2 ,indicating preliminary feasibility of the coupled process in a scenario-based flotation-wastewater matrix.
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Zhenjun Qing,Jie Duan,Haiyan Li,Yan Xue
A novel NaLaP 2 O 7 ceramic was fabricated via the solid-state reaction method. The sample sintered at 750 °C demonstrated optimal microwave dielectric properties with an ε r of 7.3, a high Q × f value of 23,510 GHz, and a τ f of –79.3 ppm/°C, which are attributed to its high relative density (95.3%) and homogeneous microstructure. Rietveld refinement confirmed a pure orthorhombic phase ( Pnma ). Furthermore, chemical bond analysis based on the P-V-L theory revealed that the high ionicity of La–O bonds predominantly governs the permittivity, while the strong lattice energy and bond energy of P–O bonds are responsible for the high Q × f value and thermal stability, respectively. Raman spectroscopy further verified the highly ordered crystal structure, shown by the characteristic vibrational modes of the P 2 O 7 4- dimer. These findings not only demonstrate that NaLaP 2 O 7 ceramic is a promising low-permittivity candidate for LTCC applications in millimeter-wave communication, but also provide deep insights into the underlying structure–property relationships.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Zhenglong Li,Shun Wang,Mingxia Gao,Kaicheng Xian,Yi Shen,Yaxiong Yang,Panyu Gao,Wenping Sun,Yongfeng Liu,Hongge Pan
LiBH4 as a promising candidate material for solid-state hydrogen storage still suffers from high dehydrogenation temperature and poor reversibility. A catalyzed LiBH4-based system with in situ introduced Li3BO3 and V is synthesized by adding NH4VO3 into LiBH4 followed by a heat treatment and a hydrogenation process. The optimized LiBH4 system introduced with 0.06 molar fraction of Li3BO3 + V, which is denoted as LiBH4–0.06LiBOV, shows excellent hydrogen storage kinetics and high reversible stability. The system starts to release hydrogen at 220 °C, and a capacity of 5.8 wt % H2 is obtained at 350 °C within 90 min. Furthermore, full rehydrogenation can be achieved at 500 °C and 50 bar of H2 for 50 min, and a capacity retention as high as 87.5% is obtained after five cycles. In situ introduced Li3BO3 and V lower the activation energy of LiBH4 and inhibit the generation of Li2B12H12 during the hydrogenation of LiBH4, which contribute to the synergistic catalytic effects on hydrogen desorption and absorption. In addition, the restraining of the particle size growth during dehydrogenation/hydrogenation is critical to inhibiting the generation of Li2B12H12 and thus improves the hydrogenation property of LiBH4. The catalyzed LiBH4 system provides new insights on LiBH4 as a high-density hydrogen storage material.
研究领域:
材料科学
·
氢气储存
·
固态化学
·
能量存储
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 7.9
Dafeng Wei,Zekai Chen,Junqiao Huang,Jinhan Li,Zhichuan Shen,Zefeng Lin,Reem Alsaigh,Nadyah Alanazi,Abdullah N. Alodhayb,Zhicong Shi
Using high-loading thick electrodes prepared by dry electrode process is an effective way for higher energy density Lithium-ion batteries(LIBs). The integration of gel polymer electrolytes (GPEs) with traditional slurry-cast thick electrodes remains fundamentally challenged by interfacial incompatibility, sluggish ion transport kinetics, mechanical stress accumulation, and parasitic side reactions from residual solvents, leading to performance decay. This study presents a novel strategy for constructing stable 4.5 V high-loading lithium-ion batteries through the synergistic integration of dry electrode and in-situ polymerized GPEs. The inherent solvent-free nature of the dry process avoids the parasitic side reactions associated with residual solvents. Consequently, the Dry electrode-LiNi 0.8 Mn 0.1 Co 0.1 O 2 (DE-NCM811) fabricated via polytetrafluoroethylene (PTFE) fibrillation-calendering demonstrates seamless interfacial compatibility when coupled with a fluorinated grafted gel polymer electrolyte formed by in-situ free-radical polymerization. Galvanostatic intermittent titration technique (GITT) and electrochemical impedance spectroscopy (EIS) evaluations confirm superior Li + diffusion kinetics and interfacial stability in the DE-NCM811|GPE|Li. Comparative electrochemical analysis reveals the superior performance of the DE-NCM811|GPE|Li, demonstrating 83.89 % capacity retention after 120 cycles in the voltage range of 3–4.5 V at 0.2 C, enhanced rate capability of 217.25 mAh g −1 at 0.1 C, stable cycling performance at high loadings of 75 mg cm −2 (80.18 % capacity retention) after 70 cycles.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Lifang Sun,Wen Li,Chengcheng Ma,Gaojian Lv,Huimeng Feng,Yanan Pu,Tianxiang Sun,Shougang Chen
The Z-scheme heterojunction has demonstrated significant potential for promoting photogenerated carrier separation. However, the rational design of all-solid Z-scheme heterojunctions catalysts and the controversies about carrier transfer path of direct Z-scheme heterojunctions catalysts face various challenges. Herein, a novel heterojunction, Cu 2 O@V-CN (octa), was fabricated using V-CN (carbon nitride with nitrogen-rich vacancies) in-situ electrostatic self-wrapping Cu 2 O octahedra. Density functional theory (DFT) calculations revealed that the separation of carriers across the Cu 2 O@V-CN (octa) heterointerface was directly mapped to the Z-scheme mechanism compared to Cu 2 O/V-CN (sphere). This is because the Cu 2 O octahedra expose more highly active (1 1 1) lattice planes with more terminal Cu atoms and V-CN with abundant nitrogen vacancies to form delocalized electronic structures like electronic reservoirs. This facilitates the wrapping of Cu 2 O octahedra by V-CN and protects their stability via tighter interfacial contact, thus enhancing the tunneling of carriers for rapid photocatalytic sterilization. These findings provide novel approaches for designing high-efficiency Cu 2 O-based photocatalytic antifoulants for practical applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2023
·Vol. 19
·期 22
·2208289
·
IF 13.3
Xinpeng Zhang,Xiangyu Li,Lei Tao,Zemin Zhang,Hao Ling,Xue Fu,Shibo Wang,Min Jae Ko,Jingshan Luo,Jiangzhao Chen,Yuelong Li
Wide-bandgap perovskite solar cells (PSCs) have attracted a lot of attention due to their application in tandem solar cells. However, the open-circuit voltage ( V OC ) of wide-bandgap PSCs is dramatically limited by high defect density existing at the interface and bulk of the perovskite film. Here, an anti-solvent optimized adduct to control perovskite crystallization strategy that reduces nonradiative recombination and minimizes V OC deficit is proposed. Specifically, an organic solvent with similar dipole moment, isopropanol (IPA) is added into ethyl acetate (EA) anti-solvent, which is beneficial to form PbI 2 adducts with better crystalline orientation and direct formation of α-phase perovskite. As a result, EA-IPA (7-1) based 1.67 eV PSCs deliver a power conversion efficiency of 20.06% and a V OC of 1.255 V, which is one of the remarkable values for wide-bandgap around 1.67 eV. The findings provide an effective strategy for controlling crystallization to reduce defect density in PSCs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 51
·77851-77863
·
IF 5.19
Jiang Changjin,Zhang Ting,Li Shuhui,Yang Zhaoguang
Fe(III)-chitosan and Fe(III)-chitosan-CTAB composites were prepared using an ionotropic gelation method. Various techniques were used to analyze the morphology, structure, and property of the adsorbents, including SEM, EDS, FT-IR, XPS, and zeta potential. Compared with Fe(III)-chitosan, Fe(III)-chitosan-CTAB was more effective for As(V) adsorption at a wide range of pH (3.0–8.0). The adsorption of As(V) onto Fe(III)-chitosan and Fe(III)-chitosan-CTAB could reach equilibrium in 20 min, and their maximum adsorption capacities were 33.85 and 31.69 mg g ‒1 , respectively. The adsorption kinetics was best described by the pseudo-second-order model ( R 2 = 0.998 and 0.992), whereas the adsorption isotherm was fitted well by the Freundlich model ( R 2 = 0.963 and 0.987). The presence of H 2 PO 4 – significantly inhibited the adsorption of As(V) onto Fe(III)-chitosan and Fe(III)-chitosan-CTAB, and humic acid also led to a slight decrease in As(V) adsorption by Fe(III)-chitosan-CTAB. Over 94% of As(V) at the initial concentration of no more than 5 mg L –1 was removed from real water by the two adsorbents. 1% (w/v) NaOH solution was determined to be the most suitable desorption agent. Fe(III)-chitosan and Fe(III)-chitosan-CTAB still maintained their initial adsorption capacities after five adsorption–desorption cycles. Based on different characterization results, both electrostatic attraction and surface complexation mechanisms played important roles in As(V) adsorption on Fe(III)-chitosan and Fe(III)-chitosan-CTAB.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2022
·
IF 7.34
Longwei Yin,Longjie Liu,Shen Lin,Gary Owens,Zuliang Chen
Arsenic (As) is a contaminant of global concern due to its negative impact on environmental systems, where As occurs mainly as two inorganic species, arsenite (As(III)) and arsenate (As(V)). Thus the simultaneously removal of both As(III) and As(V) from groundwater is a challenging issue. In this paper, zero-valent iron nanoparticles ( n ZVI) with high surface-active sites were used to simultaneously remove both As(III) and As(V) species from groundwater with removal efficiencies >99.9% for an initial concentration 100 μg L −1 . Ion chromatography atomic fluorescence (IC-AFS) analysis indicated that during removal As(III) was oxidized to As(V), while X-ray photoelectron spectroscopy (XPS) showed that the As species were adsorbed on to the surface of n ZVI by a complexation reaction. Furthermore, thermodynamic studies of the adsorption process indicated that adsorption was a spontaneous and endothermic chemisorption process. Finally, practical removal of both As species by n ZVI from real groundwaters was demonstrated with removal efficiencies of 99.9 and 70.9% for As(V) and As(III), respectively. The presence of other coexisting ions affected the removal efficiency, with phosphate and carbonate decreasing the removal efficiencies of both As(III) and As(V) due competition with active binding sites on the surface of n ZVI. Overall, this work demonstrated that n ZVI was a promising adsorbent for the practical removal of inorganic As species from complex environmental matrices such as groundwater.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Lu Zhou,Ang Li,Fang Ma,Heping Zhao,Fengxia Deng,Shanshan Pi,Aiqi Tang,Jixian Yang
In this work, we prepared microbial extracellular polymeric substances-coated nano zero valent iron (EPS@nZVI) for Sb(V) removal. Batch adsorption experiments showed that the synthesized EPS@nZVI had superior maximum adsorption capacity (202 mg/g at pH = 5) for Sb(V), much higher than that of bare nZVI especially under nonacidic conditions. The adsorption results fit the pseudo-second-order kinetic model and the Redlich-Peterson model well, implying that the adsorption was more like a chemical adsorption process. The spectral analysis showed that EPS could protect inner Fe 0 from air, preventing nZVI from generating a passivation layer on the surface, and decreasing the concentration of hydroxyl radicals in aqueous environment, which increased the reactivity of nZVI and strengthened the reducibility and adsorbability of nZVI. The coated EPS can improve the reactivity of nZVI instead of inhibiting its electron transfer. Moreover, the electrostatic repulsion between EPS@nZVI and Sb(OH) 6 − was decreased compared to that of bare nZVI after the introduction of EPS. The functional groups of EPS could play a significant role in the reduction adsorption, especially under alkaline conditions where nZVI was passivated. This work proved that EPS@nZVI has great prospects in simultaneously combining the reduction activity of nZVI in water and its stability in air.
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Gebremedhin G. Aregay,Jawad Ali,Ajmal Shahzad,Jerosha Ifthikar,Daniel T. Oyekunle,Zhuqi Chen
The preparation of an adsorbent with highest efficiency, selectivity and stability is usually a challenging task. Herein, we prepared a thio functionalized layered double hydroxide (LDH) denoted as S 2 O 4 LDH by intercalating a strong reducing agent (S 2 O 4 2− ) in the interlayers of trimetallic LDH and was applied to capture vanadium (V(V)) oxyanions from aqueous medium of diverse conditions. The successful preparation of the adsorbent was first confirmed using XRD, FTIR , EDX and CHS analyses. The results revealed that the modified LDH showed excellent performance at a wider pH range which can avoid the tedious work of adjusting pH in actual industrial wastewater treatment . The adsorption capacity was increased with temperature and obtained 379.55 mg/g at 323 K comparing to 112.3 mg/g at 293 K. The adsorption isotherm was better fitted to Langmuir model which suggested monolayer adsorption behavior. At lower temperature (293 K), the sorption kinetics were fitted to a pseudo-first order reaction model which implied physisorption reaction while at higher temperatures (303 and 323 K), the reaction order fitted to pseudo-second order reaction model which highlighted the chemisorption reaction mechanism. As confirmed using XRD, FTIR, EDX and XPS instrumental techniques, the dominant removal mechanism of V(V) involved ion-exchange and partial reduction reactions to nontoxic and less soluble V(IV) and V(III) species due to the low valent sulfur group and followed adsorption in S 2 O 4 LDH. The prepared adsorbent showed very good selectivity towards V(V) in the presence of different co-existing ions both in synthetic wastewater and spiked real water samples. This novel adsorbent also exhibited high recyclability and obtained >90.0% removal of V(V) after four consecutive adsorption–desorption cycles due to the unique memory effect of the LDH. We believe that this strategy provides a new direction to find highly efficient and selective materials for capturing vanadium ions from wastewater of diverse conditions.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Yonglong Li,Wenming Liu,Ran Yan,Jian Liang,Tao Dong,Yangyang Mi,Peng Wu,Zheng Wang,Honggen Peng,Taicheng An
A series of hierarchical three-dimensionally ordered macroporous Fe 10-x V x binary metal oxides (3DOM-Fe 10-x V x ) catalysts were designed and synthesized for selective catalytic reduction of NO x from marine diesel engine exhaust. The physical-chemical performance of the 3DOM-Fe 10-x V x catalysts were subjected by various techniques and found that the 3DOM-Fe 10-x V x with the Fe to V atomic ratio of 9.0/1.0 exhibited a wider active temperature window, better soot resistance performance compared with the conventional Fe 9.0 V 1.0 catalyst due to its special 3DOM structure. Even when simultaneously exposed to the soot and high concentration of sulfur dioxide reaction feeds, the 3DOM-Fe 9.0 V 1.0 catalyst also displayed superior catalytic activity. Interestingly, we found that the soot had a reduction activity for NO x at high reaction temperature, which can effectively extend its active temperature window. The 3DOM-Fe 10-x V x catalysts prepared in this work could be potentially a good candidate for the cargo ships de NO x catalysts to satisfy the more stringent exhaust emission rules.
✓ 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）