Article
Chemistry, Physical
Xinyue Xiang, Wei Huang, Yi He
Summary: By combining dark-field microscopy with a chromogenic probe, we visualized the exciton-initiated photocatalytic reaction on individual Cu2O microcrystals, revealing heterogeneity in reactivity and determining the reaction rate constant.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Materials Science, Multidisciplinary
Sidney A. Lourenco, Larissa S. Figueredo, Marco Aurelio T. da Silva, Ricardo Fernandes
Summary: Solution-processed PbS quantum dots embedded into organic-inorganic lead hybrid halide perovskites were synthesized and analyzed. The study showed the presence of both orthorhombic and tetragonal phases in the films at 10K and 77K, while only the tetragonal phase was observed at 300K. The size of the perovskite grains was found to decrease with increasing PbS quantum dots concentration, indicating an effect on perovskite nucleation.
Article
Chemistry, Multidisciplinary
Kaimin Gao, Yuxuan Li, Yupeng Yang, Yuan Liu, Meng Liu, Wenfei Liang, Boyu Zhang, Lifeng Wang, Jingyi Zhu, Kaifeng Wu
Summary: Lead halide perovskite quantum dots (QDs) have shown promise for quantum information processing due to their strong light-matter interaction and long-lived optical and spin coherences. This study demonstrates the modulation of polarization and manipulation of time-domain coherent dynamics of excitons in CsPbI3 QDs using a longitudinal magnetic field. The results, captured using femtosecond quantum beat spectroscopy and visualized using a Bloch sphere, provide a foundation for preparing coherent superpositions of excitons in perovskite QDs for quantum technologies.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Qingping Ke, Shuai Fang, Jun Tang, Fengfeng Li, Chuantao Ning, Zhicheng Tang, Qiang Ling, Xiangchun Liu, Ping Cui
Summary: In this study, perovskite LaSrCoFeO6 (LSCF) was used as a heterogeneous and visible-light catalyst for the epoxidation of styrene under aerobic conditions. LSCF exhibited high catalytic activity and selectivity, with the formation of O-1(2) species proposed as reactive oxygen species for the reaction. The reaction rate over LSCF catalyst was found to be 50 mmol·g(cat)(-1)·h(-1), and the conversion and selectivity of styrene oxide reached 99.9% and 80.3%, respectively.
Article
Chemistry, Multidisciplinary
Meng Liu, Junhui Wang, Guijie Liang, Xiao Luo, Guohui Zhao, Shan He, Lifeng Wang, Wenfei Liang, Juntao Li, Kaifeng Wu
Summary: Research interest in the spin properties of lead halide perovskites has been rising in recent years. However, these systems often have very short spin lifetimes. Nonetheless, these short spin lifetimes can find immediate applications in molecular photochemistry.
Article
Chemistry, Multidisciplinary
Wentong Shen, Liang Zhou, Yongdi Liu, Jinlong Zhang, Juying Lei
Summary: A new strategy for the photocatalytic removal of ROX from water was developed using resorcinol-formaldehyde resins decorated with FeOOH quantum dots. This system showed efficient degradation of ROX and conversion of arsenic to a stable form. The dominant reactive species were identified as O-1(2), with excellent reusability and stability across a wide pH range.
RESEARCH ON CHEMICAL INTERMEDIATES
(2023)
Article
Chemistry, Physical
Marta Paszkiewicz-Gawron, Ewa Kowalska, Maya Endo-Kimura, Julia Zwara, Anna Pancielejko, Kunlei Wang, Wojciech Lisowski, Justyna Luczak, Adriana Zaleska-Medynska, Ewelina Grabowska-Musia
Summary: Efforts in heterogeneous photocatalysis have focused on new and stable photoactive materials efficient in degrading pollutants under visible-light irradiation. Perovskite semiconductors with wide-bandgap were prepared and modified with carbon quantum dots or graphene quantum dots co-modified with erbium, resulting in enhanced light harvesting and improved photoactivity. The modification also exhibited significant antibacterial properties, making them promising candidates for environmental purification under solar radiation.
APPLIED SURFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Amir Soleimany, Sepideh Khoee, Sofia Dias, Bruno Sarmento
Summary: In this study, a new nanohybrid consisting of thiolated chitosan-coated gold nanostars (AuNS-TCS) as the photothermal agent and riboflavin-conjugated N,S-doped graphene quantum dot (Rf-N,S-GQD) as the two-photon photosensitizer (TP-PS) was developed. The nanohybrid exhibited combined TP-PDT/PTT when a low-power, single-pulsed laser irradiation was applied. The study demonstrates a successful single-laser-triggered, synergistic combined TP-PDT/PTT based on a plasmonic metal/QD hybrid, with potential for future investigation in clinical settings.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Yexi Li, Dongniu Fan, Ning Sui, Liang Li, Fangfei Li, Xiaochun Chi, Zhihui Kang, Qiang Zhou, Hanzhuang Zhang, Cuili Cui, Yinghui Wang
Summary: PVDF films embedded with different FAPbBr3 (FA = formamidinium) nanocrystals have been synthesized using a fast and direct method, and photodetectors utilizing these films have been fabricated. The relationship between optoelectronic performance and carrier kinetics in the composite film affected by synthesis temperature has been analyzed using transient absorption and temperature-dependent spectroscopy. A primitive fixable light-sensitive detector has been fabricated to broaden the application of PVDF films embedded with different FAPbBr3 nanocrystals in the optoelectronics field. Our results suggest that PVDF films embedded with perovskite nanocrystals can be applied in various semiconductor devices.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Review
Physics, Multidisciplinary
Irving D. Rettig, Theresa M. McCormick
Summary: In theory, oxygen is an ideal chemical reagent, but its reactivity is limited in practice. More reactive forms of oxygen can be achieved through photochemical methods and used in various applications..HandlerFunc
ADVANCES IN PHYSICS-X
(2021)
Article
Chemistry, Physical
Chi Zhang, Guochao Lu, Yao Zhang, Zhishan Fang, Haiping He, Haiming Zhu
Summary: This study reports 3D/2D perovskite/TMD type II heterostructures, which effectively enhance the light absorption and photocarrier lifetime of monolayer semiconductors by coupling solution processed CsPbBr3 film with MoS2 and WS2 monolayers.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Dallas P. Strandell, Patanjali Kambhampati
Summary: We performed time-resolved photoluminescence (t-PL) measurements on CsPbBr3 perovskite nanocrystals with a time resolution of 3 ps. Surprisingly, even though these nanocrystals are weakly confined or bulk-like, emissions from multiexcitons were observed with binding energies consistent with strongly confined quantum dots. Both biexciton and triexciton emissions were observed, and the kinetics of the multiexciton populations were analyzed in spectrally integrated form as well as decomposed into exciton, biexciton, and triexciton populations.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Brian M. Wieliczka, Severin N. Habisreutinger, Kelly Schutt, Jeffrey L. Blackburn, Joseph M. Luther
Summary: Heterojunctions play a crucial role in tailoring the properties of semiconductors in optoelectronic devices. However, fabricating perovskite/perovskite heterojunctions in metal halide perovskite devices has been challenging due to solvent incompatibilities and rapid homogenization caused by ion migration. Recent studies have shown that perovskite nanocrystals can be used to fabricate perovskite/perovskite heterojunctions, offering advantages in terms of optical and electrical properties.
ADVANCED ENERGY MATERIALS
(2023)
Article
Engineering, Environmental
Yanni Jiang, Binyang Gao, Zhongjuan Wang, Jie Li, Ye Du, Chuanshu He, Yang Liu, Gang Yao, Bo Lai
Summary: Peroxymonosulfate (PMS)-based photocatalysis with CuS quantum dots (QDs) modified MIL-101(Fe) (CSQDs@MF) was developed as a promising alternative disinfection technology for wastewater treatment. The system achieved enhanced generation of singlet oxygen (1O2) and demonstrated good disinfection performance on various bacteria, including Escherichia coli and Gram-positive B. subtilis, in practical wastewater.
Article
Chemistry, Physical
Kexuan Gao, Li-an Hou, Xiaoqiang An, Doudou Huang, Yu Yang
Summary: This study presents a novel approach for the efficient removal of organic pollutants from water using photocatalytic heterojunctions. The designed CBM catalyst, which combines defect engineering and quantum dot doping technology, exhibits a rapid recombination rate and the ability to selectively generate singlet oxygen. Under visible light irradiation, CBM can efficiently degrade tetracycline hydrochloride and also possesses excellent antibacterial properties.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Da Xu, Qilin Cheng, Petr Saha, Yanjie Hu, Ling Chen, Hao Jiang, Chunzhong Li
Summary: In this study, Se/N co-doped hard carbon nanotubes were successfully synthesized, showing high reversible storage capacity and electrochemical reversibility for potassium-ion batteries. They exhibited excellent electrochemical performance in terms of both weight and area, making them promising for application in potassium-ion batteries.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xiaotong Fan, Kai Huang, Long Chen, Haipeng You, Menglei Yao, Hao Jiang, Ling Zhang, Cheng Lian, Xiangwen Gao, Chunzhong Li
Summary: This research reports an innovative supercapacitor that increases energy density by iteratively inhaling chlorine gas in porous carbon materials. Both experimental and theoretical results indicate that porous carbon with a pore size of around 3 nm exhibits the best performance. The supercapacitor adopts multi-wall carbon nanotube as the cathode and NaTi2(PO4)(3) as the anode, achieving high specific energy and negligible capacity loss over 30,000 cycles. By replacing the anode, the energy density can be further improved, and the respiratory supercapacitor demonstrates an extremely high-power density due to the extraordinary reaction kinetics of chlorine gas.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Chemical
Hongbo Jin, Jiahao Zhang, Li Qin, Yanjie Hu, Hao Jiang, Chunzhong Li
Summary: In this study, a dual modification strategy of C-coating and Nb-doping was proposed and applied to improve LiFe0.5Mn0.5PO4 cathode materials. The C-coating layer formed a high-speed conductive network and provided protection to the electrolytes. The Nb-O coordination accelerated ion diffusion and electron transport, while suppressing the Jahn-Teller effect of Mn3+. The dual modifications resulted in LiFe0.5Mn0.5PO4 cathode materials with enhanced lithium-storage capacities and impressive cycling performance.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Jiechao Jiang, Zhengju Zhu, Ying He, Bismark Sarkodie, Wenyi Wang, Hao Jiang, Yanjie Hu, Chunzhong Li
Summary: Catalytic combustion is an important method to reduce toluene pollution, and improving the performance of catalysts is crucial. Oxygen vacancies play a key role in enhancing the catalytic combustion performance. By using flame spray pyrolysis (FSP), two different oxygen vacancy structures were synthesized and their effects on toluene catalytic combustion performance were evaluated. The closely contacted oxygen vacancies (cVo) exhibited enhanced oxygen activation capacity and significantly lower reaction temperatures compared to the separated oxygen vacancy (s-Vo) sample. The FSP synthesis strategy also provided excellent water resistance and high-temperature stability to the catalyst.
Article
Engineering, Chemical
Zhichao Shen, Yanbin Qi, Wangxin Ge, Hongliang Jiang, Chunzhong Li
Summary: Cu/Ni-B interface catalysts improve the efficiency of ureaelectrooxidation and promote the formation of N-2. This study isinstructive for the design of electrocatalysts for other nucleophileelectrooxidation reactions.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Chemical
Hu Wang, Ling Zhang, Chunzhong Li
Summary: In this study, lightweight and flexible electromagnetic shielding composite films with excellent Joule heating performance and good mechanical properties were prepared. The composite films achieved a high electromagnetic shielding effectiveness of 40.52 dB at 8.2-12.4 GHz (X-band) with a low thickness of 22 μm. They also exhibited excellent electrical heating performance with a surface saturation temperature as high as 127.6 degrees C under an applied voltage of 7 V. Therefore, the ANF/APP/PRGO composite films have practical application value in the fields of electromagnetic shielding and electric heating.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Yuan Zhao, Jipeng Xu, Kai Huang, Wangxin Ge, Zhen Liu, Honglai Liu, Cheng Lian, Hongliang Jiang, Chunzhong Li
Summary: Electrochemical alkynol semi-hydrogenation using water as the hydrogen source instead of H2 is a sustainable and environmentally friendly method for producing high-value alkenols. This study proposes the use of boron-doped Pd catalysts (PdB) and surfactant-modified interface to increase both alkenol selectivity and alkynol conversion. By assembling quaternary ammonium cationic surfactants at the electrode-electrolyte interface, in response to applied bias potential, an interfacial microenvironment is created which promotes alkynol semi-hydrogenation and inhibits hydrogen evolution reaction without decreasing alkenol selectivity.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Tianyu Liu, Yaru Zheng, Caixia Hao, Wenqing Hong, Fengxuan Wang, Hao Jang, Yanjie Hu, Chunzhong Li
Summary: Enhanced output was achieved by designing oriented glass fibers within nano-porous SiO2 film, enabling effective harvesting of renewable energy through the water evaporation process. The ordered glass fibers improved power generation performance by promoting water flow and carrier movement, resulting in an induced open-circuit voltage of 1.4 V and an induced short-circuit current of 400 nA. This provides a performance improvement strategy for evaporation-induced generators. The generated voltage driven by evaporation was found to be related to humidity difference and water flow. The availability of raw materials and the simplicity of the fabrication process also enable easy scalability of the generators.
APPLIED MATERIALS TODAY
(2023)
Article
Chemistry, Multidisciplinary
Zhihong Wang, Wu Wei, Qiang Han, Huawei Zhu, Ling Chen, Yanjie Hu, Hao Jiang, Chunzhong Li
Summary: By regulating the precipitation rates of cations and the distributions of flow field, an elongated primary particles radially aligned Ni-rich cathode was synthesized using a microstructure engineering strategy. The high aspect ratio and favorable atomic arrangement of primary particles enable isotropic strain relaxation, greatly suppressing microcrack formation and propagation, and facilitating Li-ion diffusion. The modified cathode shows superior high-rate performance, long-cycle life, and thermal stability compared with conventional counterparts.
Article
Engineering, Chemical
Lei Dong, Wangxin Ge, Yu Fan, Wenfei Zhang, Hongliang Jiang, Yongqing Zhao, Chunzhong Li
Summary: Cu-based catalysts combined with CTAB as electrolyte additives were used to improve the formate selectivity and partial current density of CO2RR. The hydrophobic interface microenvironment was created by CTAB and disrupted the interaction between interfacial water and surface-adsorbed CO. This study provides a new perspective on controlling the microenvironment to enhance electrosynthesis performance.
Article
Chemistry, Multidisciplinary
Xiaoli Jiang, Lei Tang, Lei Dong, Xuedi Sheng, Wenfei Zhang, Zhen Liu, Jianhua Shen, Hongliang Jiang, Chunzhong Li
Summary: In this study, density functional theory (DFT) simulations were used to investigate the site isolation strategy in electrocatalytic selective hydrogenation of acetylene. The results showed that isolated Cu metal sites have higher energy barriers on overhydrogenation and C-C coupling reactions. Based on this, Cu single-atom catalysts highly dispersed on nitrogen-doped carbon matrix were developed and demonstrated high ethylene selectivity under high concentrations of acetylene. The superior performance was attributed to the weak adsorption of ethylene intermediates and highly energy barriers on C-C coupling at isolated sites, as confirmed by both DFT calculations and experimental results. This study provides a comprehensive understanding of the isolated sites inhibiting the side reactions in electrocatalytic acetylene semihydrogenation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Zhihong Wang, Wu Wei, Qiang Han, Huawei Zhu, Ling Chen, Yanjie Hu, Hao Jiang, Chunzhong Li
Summary: A microstructure engineering strategy is used to synthesize elongated primary particles radially aligned Ni-rich cathodes through regulation of precipitation rates and flow field distributions. The resulting cathode exhibits enlarged lattice distance and highly exposed (003) plane, showing significant advantages such as high-rate, long-cycle life, and thermal stability. After modification, an exceptionally long life is achieved with a capacity retention of 90.1% at 1C and 84.3% at 5C after 1500 cycles within 3.0-4.3 V in a 1.5-Ah pouch cell. This work offers a universal strategy to enhance the durability of Ni-rich cathodes by achieving isotropic strain distribution.
Article
Chemistry, Physical
He Zhao, Ling Zhang, Tianbo Deng, Chunzhong Li
Summary: Researchers have developed a multifunctional wearable electrochemical biosensor based on a patterned Janus fabric for continuous analysis of glucose in sweat. The biosensor achieves high sensitivity and long-term stability, and a wearable glucose intelligent early warning system is developed based on this biosensor for real-time monitoring and emergency feedback.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Shijia Li, Chuqian Xiao, Rongzhen Chen, Mengyi Wang, Yuting Ma, Kaiwen Luo, Muyao Shen, Yihua Zhu, Yuhang Li, Chunzhong Li
Summary: In this study, Cu-dispersed oxide octahedral molecular sieve (Cu(x)-OMS-1) was used as a catalyst for electrochemical nitrate reduction reaction (NITRR). The introduction of copper optimized the adsorption capabilities of the intermediates in NITRR and inhibited competitive hydrogen evolution reaction (HER) at high current density. The study revealed that copper effectively promoted nitrate protonation during NITRR, resulting in a high current density and Faraday efficiency for nitrate reduction to ammonia.
Article
Chemistry, Multidisciplinary
Kaiyue Zhang, Chuqian Xiao, Yuhang Li, Chunzhong Li
Summary: Electrochemical biomass valorization using a Prussian blue analogue catalyst shows promise in generating value-added chemicals. The NiFe-PBA/NF catalyst exhibits excellent performance in oxidizing various substrates, achieving almost 94.1% FE for formic acid. This work has developed a promising class of catalysts for biomass valorization.
