PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
·
2026
·Vol. 263
·期 4
·e70212
·
IF 1.7
Huili Yin,Yanping Pan,Wenhao Fan,Qiang Zhang,Shaoping Chen,Jianfeng Fan
Owing to the unique crystal structure and eco-friendliness of the Zintl-phase Mg 3 Sb 2 compound, it has become a research hotspot in the field of thermoelectric materials. Particularly, the key lies in the optimization of its p-type thermoelectric properties. In this work, Ag doping was implemented in the ternary Mg 3 Sb 1.4 Bi 0.6 matrix, which realized the simultaneous improvement of both the electrical and thermal properties in such materials. At 723 K, the maximum power factor of the Mg 2.99 Ag 0.01 Sb 1.4 Bi 0.6 sample reached 6.8 µW cm −1 K −2 , which was approximately three times that of the undoped sample (~2.3 µW cm −1 K −2 at 723 K). In addition, Ag doping introduced extra lattice disorders and point defects, which enhanced the phonon scattering effect and thus led to a significant suppression of lattice thermal conductivity. Specifically, the Mg 2.96 Ag 0.04 Sb 1.4 Bi 0.6 sample achieved a low lattice thermal conductivity of ~0.47 W m −1 K −1 at 723 K. Ultimately, the peak zT value of the Mg 2.99 Ag 0.01 Sb 1.4 Bi 0.6 sample goes up to 0.68 at 723 K, which was three times higher than that of the undoped sample. This study provides an important reference for subsequent research on optimizing the thermoelectric performance of p-type Mg 3 Sb 2 -based materials.
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NATURE
·
2026
·Vol. 654
·期 8117
·69-75
·
IF 56.1
Wang Di,Li Saisai,Ding Zijin,Xu Jian,Chen Xingyu,Zheng Qiao,Alshahrani Thamraa,Liu Siyu,He Tingwei,Yue Xinxin,Qaid Saif M. H.,Wei Keyu,Fu Xuewen,Feng Lin,Yang Ou,Ju Huanxin,Jiang Yuanzhi,Chen Jun,Yuan Mingjian
Conventional n–i–p architecture remains a robust platform for scalable perovskite photovoltaics 1 , 2 , yet its steady-state efficiency has stagnated at about 26% (ref. 3 ), lagging behind their p–i–n counterparts 4 . This performance gap arises from persistent non-radiative recombination at textured electron transport layer (ETL)/perovskite interfaces, yet the underlying physical origin remains unknown. Here we show that these losses originate from the synergistic combination of band misalignment and electron accumulation at the buried interface. To address this dual challenge, we develop a continuously graded n + /n-doped SnO 2 ETL through a ligand-competitive binding strategy, which enables spatially defined doping that creates a built-in electric field. This graded architecture simultaneously minimizes band offset and accelerates electron extraction, thereby effectively suppressing the cross-interface recombination. The resulting n–i–p perovskite solar cells (PSCs) achieve a certified steady-state power conversion efficiency (PCE) of 27.17% (27.50% in reverse scan), the highest for n–i–p PSCs reported so far. The scalability of this strategy is further demonstrated by achieving a PCE of 25.79% for a 1 cm 2 device and 23.33% for a perovskite module with a 16.02 cm 2 aperture area. This work establishes a generalized example for energy-band engineering in metal-oxide transport layers, overcoming a fundamental efficiency bottleneck in conventional perovskite photovoltaics.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Longyan Zhang,Gang Zhao,Xinming Wu
Molybdenum disulfide (MoS 2 ) has been widely studied in supercapacitors due to its high theoretical capacity, but the lower intrinsic conductivity limits its further application. In this paper, Al, P-doped MoS 2 was grown in situ on carbon cloth using a one-step hydrothermal method, respectively, and the implementation of the doping strategy increased the layer spacing of MoS 2 while synergistically improving the conductivity and specific capacitance of the material. The results show that Al, P doping not only enhance the conductivity of pristine MoS 2 by 35.8% and 21.1%, respectively, but also improve the specific capacitance from 284.4 F g -1 (at a current density of 0.5 A g -1 ) to 424.6 F g -1 and 449.2 F g -1 , respectively. Surprisingly, the ASC device assembled with Al 0.05 -MoS 2 as the positive electrode and P 0.05 -MoS 2 as the negative electrode achieved an energy density of 30.07 Wh kg -1 at a power density of 1259.99 W kg -1 . These results demonstrate the superiority of Al, P-doped MoS 2 nanoflowers for high-performance supercapacitor applications.
研究领域:
材料科学
·
能源存储
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POLYMER
·
2025
·
IF 4.5
Yajie Ding,Hua Ma,Chaoze Ji,Dingxiang Wei,Hongzhou Shang,Lihua Liu,Ning Qiao
A pH and temperature dual-responsive KGM/P(NIPAM-CA) hydrogel drug carrier was prepared by using natural polysaccharide konjac glucomannan (KGM), pH-sensitive monomer crotonic acid (CA), and temperature-sensitive monomer N-isopropylacrylamide (NIPAM). The effect of mass ratio of NIPAM to KGM on the properties of KGM/P(NIPAM-CA) hydrogels was studied by a range of testing methods. The drug loading and release properties of KGM/P(NIPAM-CA) hydrogel were investigated using 5-fluorouracil (5-FU) as a model drug. Results show that KGM/P(NIPAM-CA) exhibits good swelling and mechanical properties determined by its composition. As a drug carrier KGM/P(NIPAM-CA) hydrogel demonstrated a maximum encapsulation efficiency of 30.17% and a maximum drug loading capacity of 54.41% for 5-FU at 25°C. In simulated colonic fluid (SCF) at 25°C, the cumulative drug release rate of KGM/P(NIPAM-CA) reached 58.86% within 48 hours, which was 1.8 times higher than that in simulated gastric fluid (SGF). Furthermore, the hydrogel demonstrated biocompatibility, with a hemolysis rate of less than 3% and a cell viability exceeding 90%. These results establish KGM/P(NIPAM-CA) as a promising, biocompatible platform for stimuli-responsive, colon-targeted drug delivery.
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Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2025
·
IF 2.4
Guinan Lu,Cuilian Yi,Lingbo Hao,Chenyi Wang,Xiaoyan Zhao
Based on the rigid structure and conjugation effect of terphenyl, a series of p-terphenyl copolymers (TP-x) were synthesized in this study to investigate the effect of p-terphenyl group on the thermal, optical, and processability of the materials. It was found that Td of the polymers increased from 390 °C (10% p-triphenyl content) to 407 °C (30% p-triphenyl content) in O2. In addition, the fluorescence intensity of the polymer in liquid state enhanced with the enhancement of p-terphenyl content. However, in the solid state, the fluorescence intensity of the samples actually decreased with the increase of p-terphenyl. This is related to the aggregation state of molecular chains. In order to avoid the fluorescence quenching phenomenon caused by the stacking of molecular chains, the polymers were produced into the nanofiber membranes. The electrospun fibers exhibited the bright blue. The fluorescence stability of the fiber membranes were further studied via immersing the fiber sample in different pH solutions. The results showed that the membranes exhibited relatively stable luminescence under acidic conditions, and the fluorescence retention rate under alkaline conditions could reach to 86.5%. This indicates that the polymer membranes developed in this work can be the competitive candidate for flexible fluorescent labeling.
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NANOTECHNOLOGY
·
2022
·Vol. 33
·期 45
·455401
·
IF 3.953
Hongjing Wang,Hongyong Chen,Shuli Yin,Qiqi Mao,Chunjie Li,You Xu,Xiaonian Li,Ziqiang Wang,Liang Wang
Nonmetal doping is a promising strategy to improve electrocatalytic performance of noble metal based catalysts for oxygen reduction reaction (ORR). Herein, we report a facile method to fabricate PdCuBP nanothorn assemblies (PdCuBP NTAs) by co-doping B and P into pre-synthesized PdCu NTAs using NaBH4 and NaH2PO2 as B source and P source, respectively. The metal-nonmetal structure and multi-branched morphology can optimize oxygen adsorption energy and avoid catalyst migration, agglomeration and Ostwald ripening. As such, the obtained PdCuBP NTAs exhibit efficient activity and excellent long-term stability for ORR. This research offers an excellent strategy for co-doping nonmetal elements into metal nanocrystals with controllable composition and structure to improve electrocatalytic ORR performance.
研究领域:
材料科学
·
电化学
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JOURNAL OF CATALYSIS
·
2019
·
IF 7.723
Hongye Qin,Biao Zhang,Yaping Pan,Xixi Wang,Lechen Diao,Jiao Chen,Jinli Wu,Enzuo Liu,Junwei Sha,Liying Ma,Naiqin Zhao
Developing efficient and low-cost electrocatalysts for hydrogen evolution reaction (HER) is important in clean energy systems. Non-noble transition metals are the most promising candidates for the replacement of conventional Pt group catalysts of HER . However, most non-noble metals show poor HER activity due to the intrinsic electronic structures. Herein, P atoms doped Ni 3 S 2 (P-doped Ni 3 S 2 ) nanosheets array grown on Ni foam has been successfully synthesized and further applied as the efficient electrocatalysts for HER in alkaline media. P-doped Ni 3 S 2 shows higher catalytic activity for HER compared with pristine Ni 3 S 2 , which affords the current densities of 10 mA cm −2 at an overpotential of 139 mV and long-term stability over 110 h. Density functional theory (DFT) calculations reveal that the introduction of P atoms modify the electronic structure of Ni 3 S 2 , enhance the electrical conductivity, optimize the HER Gibbs free-energy (Δ G H* ) and the change of water adsorption energy (Δ G H2O* ), and reduce the barrier of water dissociation optimize the HER Gibbs free-energy (Δ G H* ), change water adsorption energy (Δ G H2O * ) and reduce the barrier of water dissociation. Remarkably, energy integral of a crystal orbital Hamilton population (ICOHP) gives access to the contribution of an atom or a chemical bond to the distribution of one-particle bonding within the transistion state of water dissociation and reveals the reduced essence of water dissociation barrier.
研究领域:
材料科学
·
电催化
·
理论计算
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MATERIALS LETTERS
·
2020
·
IF 3.204
Haiyan Zhang,Sen Liu
SnO 2 /Co 3 O 4 n-p heterojunctions have been prepared by organometallic chemistry-assisted approach, where holy Co 3 O 4 nanosheets and (CH 3 ) 2 SnCl 2 were used as precursors. It is found that the surface oxygen-containing species could be regulated by changing the ratio of Co 3 O 4 precursors and Sn-containing organic compound. Our present work is of importance because it provides a new and effective approach for construction of heterojunctions .
研究领域:
材料科学
·
化学工程
·
纳米技术
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ChemistrySelect
·
2022
·Vol. 7
·期 43
·e202202843
·
IF 2.307
Cheng-hui Wang,Qing Tang,Jie Zhao,Xin Xiao,Zhu Tao,Ying Huang
Graphical We have reported a stimuli-responsive supramolecular assembly of twisted cucurbit[14]uril ( t Q[14]) and p -diaminoazobenzene (DAAB). Our research results revealed that the interaction between the DAAB and t Q[14], t Q[14] affords the complex t Q[14]-DAAB. The association and dissociation of the supramolecular assembly could be reversibly controlled by the thermal. Furthermore, the t Q[14]-DAAB complex also responded to selected anionic stimuli such as AcO − and F − , and exhibiting potential analysis application. The supramolecular assembly between twisted cucurbit[14]uril ( t Q[14]) and p -diaminoazobenzene (DAAB) has been successfully developed based on host-guest interactions. Interestingly, as the temperature increases, the assembly dissociates and recovers when the temperature decreases. This shows that the association and dissociation of the supramolecular assembly can be reversibly controlled by the temperature. In addition, the t Q[14]-DAAB complex also exhibits selective ultraviolet and colorimetric responses for AcO − and F − , the detection limits of the sensor for AcO − and F − are 5.17×10 −6 M and 2.31×10 −5 M, respectively. The t Q[14]-DAAB exhibits potential analysis applications.
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JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A
·
2022
·Vol. 111
·期 3
·404-414
·
IF 4.854
Xiaoxue Wang,Jingliang Wu,Min Wang,Chunbo Lu,Wenfang Li,Qiao Lu,Yanying Li,Bo Lian,Bo Zhang
Recent efforts have focused on preparing drug-loaded hydrogel for wound healing. In order to obtain an ideal hydrogel dressing for skin wound repair, a carboxymethyl chitosan-gelatin hydrogel was prepared for co-delivery of SP (substance P) and DMOG (dimethyloxallyl glycine) by a chemical cross-linking method using genipin as the cross-linking agent. The synthesized hydrogels have good biocompatibility and physicochemical properties due to the low toxicity of the hydrogel material. The three-dimensional network structure of the hydrogels supports cell migration and proliferation, and the combination of SP and DMOG drugs exhibited strong effects on cell proliferation. Moreover, the co-loaded drug hydrogels could significantly promote wound healing in vivo, and provide a potential hydrogel for wound healing.
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PubMed
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Yimeng Zhou,Qianjin Ye,Xiangli Shi,Qiong Zhang,Qi Song,Changjian Zhou,Di Li,Deli Jiang
Due to the multiple electron and proton transfer processes involved, the photogenerated charges are easily recombined during the photocatalytic reduction of CO2, making the generation of the eight-electron product CH4 kinetically more difficult. Herein, Ni3B nanoparticles modulated by p-block element were combined with TiO2 nanosheets to construct a novel Schottky junction photocatalyst (Ni3B/TiO2) for the selective photocatalytic conversion of CO2 to CH4. The formed Ni3B/TiO2 photocatalyst with Schottky junction ensures a transfer pathway of photogenerated electrons from TiO2 to Ni3B, which facilitates the accumulation of electrons on the surface of Ni3B and subsequently improves the activity of photocatalytic CO2 reduction to CH4. The optimized Ni3B/TiO2 Schottky junction shows an improved CH4 yield of 30.03 μmol g–1 h–1, which was much higher than those of TiO2 (1.62 μmol g–1 h–1), NiO/TiO2 (2.44 μmol g–1 h–1), and Ni/TiO2 (4.3 μmol g–1 h–1). This work demonstrated that the introduction of p-block elements can alleviate the scaling relationship effect of pure metal cocatalysts to a certain extent, and the modified Ni3B can be used as a promising new cocatalyst to effectively improve the selective photocatalytic of CO2 to CH4.
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PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
IF 3.428
Ying Wang,Changhai Liu,Park Yoon-Yul,Atarashi Hiroshi,Tomiyasu Hiroshi,Wenchang Wang,Zhidong Chen
By incorporating the advantages of different materials, the composite material can Preferably strengthen the electrochemical performance of the electrode material. In this paper, CQDs/P-Fe 2 O 3 on carbon cloth (CC) as flexible electrode material was synthesized with one-pot hydrothermal synthesis procedure. The one-dimentional (1D) structure was favorable due to the chemical stability, electrical conductivity, and fast electrochemical kinetics. While the current density is 0.5 A/g, the specific capacitance of the composite reaches 1786.5 F/g. The assembled supercapacitor remains at 91.31% of its initial specific capacitance after 1000 cycles. When the power density is 639.99 W/kg, the energy density is 103.11Wh/kg, and even when the power density is 12800 W/kg, the energy density can reach 44.8 Wh/kg.
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