ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Bo Yu,Zhiwei Xu,Hualin Liu,Yumeng Liu,Kanghua Ye,Zhiquan Ke,Jiankai Zhang,Huangzhong Yu
Despite the fact that perovskite solar cells (PSCs) are widely popular due to their superb power conversion efficiency (PCE), their further applications are still restricted by low stability and high-density defects. Especially, the weak binding and ion–electron properties of perovskite crystals make them susceptible to moisture attack under environmental stress. Herein, we report an overall sulfidation strategy via introduction of 1-pentanethiol (PT) into the perovskite film to inhibit bulk defects and stabilize Pb ions. It has been confirmed that the thiol groups in PT can stabilize uncoordinated Pb ions and passivate iodine vacancy defects by forming strong Pb–S bonds, thus reducing nonradiative recombination. Moreover, the favorable passivation process also optimizes the energy-level arrangement, induces better perovskite crystallization, and enhances the charge extraction in the full solar cells. Consequently, the PT-modified inverted device delivers a champion PCE of 22.46%, which is superior to that of the control device (20.21%). More importantly, the PT-modified device retains 91.5% of its initial PCE after storage in air for 1600 h and over 85% of its initial PCE after heating at 85 °C for 800 h. This work provides a new perspective to simultaneously improve the performance and stability of PSCs to satisfy their commercial applications.
研究领域:
材料科学
·
能源科学
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DOI
PubMed
高影响因子
Materials Futures
·
2022
·Vol. 1
·期 4
·045201
·
IF 0
Kangqiao Cheng,Wei Xie,Shuo Zou,Huanpeng Bu,Jin-Ke Bao,Zengwei Zhu,Hanjie Guo,Chao Cao,Yongkang Luo
Rhodium-containing compounds offer a fertile playground to explore novel materials with superconductivity (SC) and other fantastic electronic correlation effects. A new ternary rhodium-antimonide La2Rh_{3+\delta}Sb4 (\delta\approx 1/8) has been synthesized by a Bi-flux method. It crystallizes in the orthorhombic Pr2Ir3Sb4-like structure, with the space group Pnma (No. 62). The crystalline structure appears as stacking the two-dimensional RhSb4- and RhSb5-polyhedra networks along b axis, and the La atoms embed in the cavities of these networks. Band structure calculations confirm it as a multi-band metal with a van-Hove singularity like feature at the Fermi level, whose density of states are mainly of Rh-4d and Sb-5p characters. The calculations also imply that the redundant Rh acts as charge dopant. SC is observed in this material with onset transition at T_c^\mathrm{on}\approx 0.8 K. Ultra-low temperature magnetic susceptibility and specific heat measurements suggest that it is an s-wave type-II superconductor. Our work may also imply that the broad Ln_2Tm_{3+\delta}Sb4 (Ln = rare earth, Tm = Rh, Ir) family may host new material bases where new superconductors, quantum magnetism and other electronic correlation effects could be found.
研究领域:
凝聚态物理学
·
材料科学
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DOI
CATALYSIS LETTERS
·
2019
·Vol. 149
·期 11
·2973-2983
·
IF 2.372
Luo Wei,Du Hui-Jun,Bonku Emmanuel Mintah,Hou Ya-Li,Li Ling-Ling,Wang Xiao-Qiang,Yang Zhong-Hua
Abstract Enantiopure alcohols have received much attention due to their widespread use as pharmaceutical intermediates. In the asymmetric biosynthesis of enantiopure alcohols, the excellent performance of carbonyl reductase makes it be the best choice as the biocatalysts. In this work, an alkali-tolerant carbonyl reductase ( Bs CR, encoded by yueD ) from Bacillus subtilis (strain 168) was obtained through gene mining, and successfully heterologously expressed in Escherichia coli with pET-32a. Bs CR showed excellent alkali resistance and even can keep more than 70% of its peak activity after incubation in Tris–HCl buffer at pH 9.0 for 40 h. The Michaelis constants and maximal velocity of the Bs CR to NADPH (A) and ethyl 4-chloroacetoacetate (B) are \(K_{m}^{A}\) = 5.390 × 10 −2 mmol/L, \(K_{m}^{B}\) = 1.855 mmol/L, and \(V_{max}\) = 147.3 μmol·min −1 ·mg −1 , respectively. Applying the E. coli BL21(DE3)/pET-32a-yueD to catalyze asymmetric reduction of ethyl 4-chloroacetoacetate and acetophenone, the yield of S -CHBE reached 89.9% and S -1-phenyl ethanol reached 66.7%, and e.e. of both products reached more than 99%. This work provides a novel CR for asymmetric reduction. Graphic Abstract A carbonyl reductase ( Bs CR) and its gene were identified through gene mining, and overexpressed in Escherichia coli BL21(DE3) for whole-cell biocatalytic asymmetric reduction
研究领域:
生物技术
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生物化学
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药物科学
·
酶学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Xuan Zhou,Lei Yuan,Zongbao Sun,Wen Zhang
Residual organophosphorus pesticides (OPs) frequently contaminate farm products, such as vegetables, and consequently threaten food safety. Herein, we present an enzyme-regulated dual-emission probe, MIL-53-OPH@S-S-AuNCs, for synchronous OPs hydrolysis and fluorescence determination. The probe, containing NH 2 -MIL-53(Al), organophosphorus hydrolase (OPH), and disulfide-functionalized Au nanoclusters (S-S-AuNCs), thus provides two emissive outputs (F 427 and F 655 ). Specifically, an OPH-assisted hydrolysis route is designed, where OPs are converted into class-informative products, including p-nitrophenol (PNP) and thiol/thiolate species (R-SH/S - ). PNP induces pronounced quenching of the blue emission (F 427 ) via resonance energy transfer, while sulfur-containing products perturb the disulfide-crosslinked state of S-S-AuNCs and attenuate the red emission (F 655 ). Stepwise optimizations are performed to promote efficient catalytic conversion and stable dual-channel readout, where quenching time, pH, and temperature are tuned to achieve pleasurable sensing conditions. This method provides log-linear quantification for OPs in a wide range of 6.5 × 10 −6 ∼20 μg mL −1 , with an impressive limit of detection of 3.4 × 10 −6 μg mL −1 . The proposed method is further validated by natural sample analyses and recovery tests in real vegetables, giving relative errors of 4.2∼8.6% and recoveries of 96.2∼105.2%.
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DOI
高影响因子
CATALYSIS TODAY
·
2025
·
IF 5.3
Jun Wu,Qi Li,Keke Zhang,Shuailing Wang,Xianjun Lang,Feng Wang
Linear conjugated polymers have emerged as a versatile class of visible light photocatalysts, attracting increasing interest due to their tunable optoelectronic properties. However, their linear backbones often result in insufficient electron transfer, a limitation that can be mitigated by coupling them with a conductive π-conjugated system such as reduced graphene oxide (rGO). Here, we report the electrostatic self-assembly of a dibenzothiophene- S , S -dioxide-based conjugated polymer (PSOBN2) with rGO, forming a PSOBN2-rGO heterostructure. The two-dimensional conjugated structure of rGO facilitates π-electron transfers over PSOBN2 through interfacial coupling, thereby overcoming the inherent charge carrier transport limitation of linear conjugated polymers for enhanced charge separation and accelerated interfacial electron transfer. An optimized heterostructure, PSOBN2-rGO1, exhibits a better H 2 O 2 production rate of 9972 μmol h –1 g –1 in an air atmosphere under visible light irradiation, which is 1.42 times that of pristine PSOBN2. Notably, under natural sunlight irradiation, PSOBN2-rGO1 demonstrates an exceptional H 2 O 2 production rate of 9267 μmol h –1 g –1 within the initial hour. Mechanistic studies confirm the crucial role of rGO-facilitated electron transfer in promoting the reduction of O 2 and oxidation of H 2 O dual pathways for the photosynthesis of H 2 O 2 . This work offers a strategy for overcoming the inherent limitations of linear conjugated polymers toward efficient artificial photosynthesis of H 2 O 2 .
研究领域:
材料科学
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纳米技术
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光催化
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聚合物化学
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能量转换
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环境科学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Lixiong Xu,Shuo Geng
Electrocatalytic glycerol oxidation reaction (GOR) coupled with hydrogen evolution reaction (HER) is an ideal method to achieve efficient hydrogen production. However, realizing the stable degradation of glycerol to formate at high current densities still faces great challenges, mainly stemming from the competition between GOR and oxygen evolution reaction (OER) at high potentials. To address this issue, in this study, S–Cu–Ni/NF catalysts were successfully synthesized using Cu–Ni/NF catalysts as precursors. The introduction of Cu effectively suppressed the OER, enabling the catalysts to achieve more than 75% formate Faraday efficiency over a wide potential range from 1.3 V vs RHE to 1.6 V vs RHE. Meanwhile, S doping significantly enhanced the electron transport ability of GOR, enabling the S–Cu–Ni/NF catalyst to achieve a high current density of 100 mA cm–2 at a low potential of 1.395 V vs RHE. In addition, after 24 h of continuous operation at a high current density of 100 mA cm–2, the catalyst potential increased by only 40 mV, demonstrating excellent stability. Scanning electron microscopy with energy dispersive spectra (SEM-EDS), X-ray photoelectron spectra (XPS) and in situ Raman characterization confirmed that the precipitation of S promoted the formation of the active site NiOOH and its dynamic growth during the GOR process. The present study not only improved the selectivity of formate at high potentials by inhibiting OER but also significantly enhanced the GOR performance, demonstrated the potential of stable degradation of glycerol at high current densities, and provided a feasible strategy for the industrial application of glycerol oxidation coupled with hydrogenolysis.
研究领域:
电化学
·
催化材料
·
能源转换与储存
✓ 已验证
产品关联
DOI
PubMed
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2023
·
IF 5.1
Zhengpeng Chen,Lei Wang,Yuanyuan Jin,Hongyun Guo,Yongdong Zhang,Mingzhong Ma,Xiaobo Wang,Xing Zhou,Ziqiang Lei,Dedai Lu
Gas therapy and embolization are important treatment methods for solid tumors. In order to improve the efficacy of NO therapy and simplify the operation of interventional embolization, we designed and prepared the microacidic-gelled poly[(L-Glutamic acid- ran -L-Tyrosine)- b -L-Threonine- b -L-S-nitrosocysteine]s (PGTTSNCs, obtained by the reaction of tert-butyl nitrite with thiol side groups of poly[(L-Glutamic acid- ran -L-Tyrosine)- b -L-Threonine- b -L-Cysteines]s, PGTTCs.) for noninterventional embolization combined with NO gas therapy for solid tumors. The results of in vivo experiments indicated that PGTTSNCs from PGTTCs-6.4 (the gelled-pH value is 6.4) has significant target-accumulation and therapy effects, and at 10 days post-injection only scars were found at the tumor site. After 20 days, the tumors of model mice were completely disappeared. The method is extremely simple and efficient for solid tumors, which is not only a great innovation of tumors theranostic, but also a qualitative development in nanomaterials .
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2017
·
IF 2.299
Misganaw Alemu Zeleke,Dong-Hau Kuo,Osman Ahmed Zelekew,Albert Daniel Saragih
Ge-substituted Cu 2 Sn(S,Se) 3 bulks with Cu 2 (Sn 1- x Ge x )(S,Se) 3 formula at x = 0, 0.25, 0.50, 0.75, and 1.0 were synthesized by reactive liquid phase sintering , where the heating process was held at 200 °C for 20 min before reaching the sintering temperature of 600 °C for 30 min. In the presence of volatile Sb 2 S 3 sintering aid , the effects on densification , grain boundary, crystalline size, and electrical properties of Ge-substitution were investigated. Cu 2 (Sn 1- x Ge x )(S,Se) 3 showed p-type behavior for all x values. It was found that the mobility was increased sharply and carrier concentration was decreased rapidly as the x -value was increased. The electrical conductivities were found to be 14.0, 22.7, 36.8, 126, and 153 S/cm at x = 0, 0.25, 0.50, 0.75, and 1.0, respectively. X-ray diffraction (XRD) peaks were shifted to the higher angle and band gaps increased upon successive increasing of the Ge/[Ge+Sn] fraction being 1.19, 1.21, 1.22, 1.24, and 1.26 eV at x = 0, 0.25, 0.50, 0.75, and 1.0, respectively. The studies of Ge-x-CTSSe bulks were based on Ge Sn defects and supported by the data of morphological, structural, electrical, and optical properties .
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Wenyi Wang,Long Tang,Cheng Chen,Xueqin Wang,Yuanyuan Wang,Wencong Sun
Efficient and stable electrocatalysts with low platinum content are crucial for the practical application of fuel cells. The development of Pt-based single atom catalysts (SACs) has emerged as a promising research direction. In this study, we design and prepare a SACs based on MoS 2 with Pt–S–Mo and Pd–S–Mo active sites (Pd, Pt–MoS 2 ) by successively occupying vacancies, while maintaining the individual characteristics of the active sites. The resulting Pd, Pt–MoS 2 catalyst exhibits excellent electrocatalytic activity for oxygen reduction reaction (ORR), long-term stability, and resistance to common poisons (SCN − , S 2− , and methanol) under neutral conditions. Meanwhile, the microbial fuel cell (MFC) equipped with Pd, Pt–MoS 2 exhibits excellent performance in terms of actual electricity generation performance and sewage purification capacity with an ultrahigh power density, average chemical oxygen demand (COD) removal rate, and coulombic efficiency (CE) of 1398.6 ± 43.5 mW m −2 , 96.2 ± 2.2 %, and 22.5 ± 0.5 %, respectively. This strategy will provide new insights into the development of advanced bimetallic as well as polymetallic doped vacancies of MoS 2 SACs.
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产品关联
DOI
高影响因子
LETTERS IN APPLIED MICROBIOLOGY
·
2021
·Vol. 72
·期 4
·399-407
·
IF 2.858
Wang N.,Xu Y.,Peng C.,Wang X.,Wei Y.,Li K.,Wang S.,Xu A.,Gao J.
A strain NQ1, which showed efficient asymmetric reduction of 3,5‐bis(trifluoromethyl) acetophenone (BTAP) to enantiopure (S)‐[3,5‐bis(trifluoromethyl)phenyl]ethanol ((S)‐BTPE), which is the key intermediate for the synthesis of a receptor antagonist and antidepressant, was isolated from a soil sample. Based on its morphological and internal transcribed spacer sequence, the strain NQ1 was identified to be Rhodotorula mucilaginosa NQ1. Some key reaction parameters involved in the bioreduction catalyzed by whole cells of R. mucilaginosa NQ1 were subsequently optimized, and the optimized conditions for the synthesis of (S)‐BTPE were determined to be as follows: 5·0 ml phosphate buffer (200 mmol l−1, pH 7·0), 80 mmol l−1 of BTAP, 250 g (wet weight) l−1 of resting cell, 35 g l−1 of glucose and a reaction for 18 h at 30°C and 180 rev min−1. The strain NQ1 exhibited a best yield of 99% and an excellent enantiomeric excess of 99% for the preparation of (S)‐BTPE under the above optimal conditions, and could also asymmetrically reduce a variety of bulky prochiral carbonyl compounds to their corresponding optical hydroxyl compound with excellent enantioselectivity. These results indicated that R. mucilaginosa NQ1 had a good capacity to reduce BTAP to its corresponding (S)‐BTPE, and might be a new potential biocatalyst for the production of valuable chiral hydroxyl compounds in industry.
研究领域:
微生物学
·
生物催化
·
有机化学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Yan Wang,Shengzhe Zhao,Yi Yang,Raul D. Rodriguez,Anya Lipovka,Yun Lu,Honglan Huang,Jinju Chen
Ag nanoparticle-decorated Bi 2 O 3 -TiO 2 heterogeneous photocatalysts were successfully obtained by combining facile sacrificial templates and photoreduction . The as-synthesized Ag@Bi 2 O 3 -TiO 2 photocatalysts with a narrow band gap of 2.40 eV exhibited considerable photocatalytic activity to degrade rhodamine B (RhB) and tetracycline hydrochloride (TCH), and the removal efficiency reached 100% and 92%, respectively. Ag@Bi 2 O 3 -TiO 2 photocatalysts also exhibited stable recyclability for the degradation of RhB and TCH. Trapping experiments helped determine the major reactive oxidative species for TCH photodegradation . The desirable photodegradation performance is mainly attributed to improved light absorption , enhanced charge separation, and strong redox capacity of Ag@Bi 2 O 3 -TiO 2 nanostructures with S-scheme heterojunction . This work provides a facile avenue to construct heterogeneous tubular nanostructures with intensive photoabsorbance and effective photocatalysis to degrade organic contaminants.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Lijuan Chen,Yaoyong Dong,Mengwei Han,Ting Song,Xuejun Zheng,Wenyuan He,Bei Long,Xiongwei Wu,Yong Pei,Xianyou Wang
MnOOH is regarded as a product of manganese-based materials after H + insertion. There is rare study on the Zn 2+ /H + storage capability of MnOOH. Herein, MnOOH nanofibers are prepared through a one-step hydrothermal method and developed as a promising cathode. The introduction of S doping changes the crystal structure of MnOOH and is conducive to its electronic/ionic transport and structural stability, proven by density functional theory calculations and various characterizations. The reduced Zn 2+ diffusion barrier of S-doped MnOOH leads to its increased Zn 2+ storage capability in the test of rate capability, especially at large current density. The Zn 2+ /H + insertion-type mechanism of MnOOH is revealed by ex situ XRD, Raman, XPS, and SEM tests. Therefore, this optimized material delivers a high reversible capacity of 178 mAh g −1 at 0.1 A g −1 , a good rate capability of 50 mAh g −1 at 3.0 A g −1 , and a long cyclic life with 108 mAh g −1 at 0.5 A g −1 over 500 cycles. Moreover, the electrode still shows satisfactory rate capability and cyclic life even at the high mass loadings of 10 and 15 mg cm −2 . This work proves the Zn 2+ /H + storage capability of MnOOH and its potential as a high-performance cathode in aqueous zinc ion battery.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）