APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
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IF 20.2
Xiaoyue Chen,Guangmin Ren,Yaru Wang,Zizhen Li,Zisheng Zhang,Xiangchao Meng
The synthesis of ammonia through electrocatalytic nitrogen reduction reaction (NRR) under ambient conditions is a presumable strategy. However, it still faces the problems of poor activity and low Faradic efficiency, so the development of efficient, stable and highly selective catalysts is of the importance. Molybdenum disulfide (MoS 2 ) materials are widely used in NRR reactions owing to good electrical conductivity and abundant active sites, but the edge active site is the dual active site of NRR and competitive hydrogen evolution reaction (HER). Encouragingly, the strong interaction between elements in the P-block and N 2p orbitals results in excellent performance in adsorbing and activating nitrogen. Meanwhile, the partial occupation of p-orbitals by elements in the P-block also leads to poor HER activity. Herein, we introduced the P-block element Bi into 1 T-MoS 2 and prepared Bi 2 S 3 /MoS 2 composite. Taking advantage of the high conductivity of 1 T-MoS 2 and the N 2 adsorption and activation advantages of Bi element, an ammonia yield rate of 54.64 µg h −1 mg −1 cat. and a high Faradic efficiency of 58.56 % were obtained. In addition, the active site and the evolution pathway of N 2 reduction were investigated by in-situ infrared spectroscopy measurements and density functional theory (DFT). The in-situ infrared spectroscopy measurement results manifested the presence of the main intermediate transition state during the reduction of N 2 to NH 3 . The calculation results indicated that N 2 had the best adsorption on the introduced P-block element Bi, and the entire NRR reaction process followed an alternating pathway. This study reveals the synergistic effect of P-block elements and transition metal-based electrocatalytic materials on nitrogen reduction to ammonia synthesis .
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Zhihui Hu,Shasha Tang,Yan Jia,Zekun Dong,Yu Tang,Yuan Wu,Yan Zhang
The photocatalytic reduction of bromate (BrO 3 - ) in drinking water shows great promise. However, current photocatalysts mainly depend on UV light for effective bromate transformation. In this study, we introduced a novel visible-light-active catalyst, TBR (a combination of Ti 3 C 2 MXene, Bi, and TiO 2 ), synthesized through a straightforward hydrothermal method. Batch experiments were carried out in the laboratory to evaluate the photocatalytic removal effect of bromate by TBR under visible light. TBR completely eliminated 200 µg/L of bromate within 60 minutes (first-order kinetic constant: 0.0509 min -1 ). By employing photoelectric properties, density functional theory (DFT) and scavenger experiments, an intrinsic mechanism of the photocatalytic breakdown of bromate over the TBR/visible-light system was elucidated. The introduction of Bi induces the surface plasmon resonance (SPR) effect, and reduced the effective mass of electrons, resulting in a narrower band gap (from 2.88 eV to 2.50 eV) of the photocatalyst, and enables it to respond to visible light. Additionally, Ti 3 C 2 acted as an "electron sink," facilitating carrier migration and accumulation on its surface, creating a Schottky barrier that promoted efficient electron transfer and the separation of electron-hole pairs. Generation of ·O 2 - and ·OH radicals fostered mutual conversion of Br - and ·Br, playing a vital role in bromate removal. Moreover, TBR showed excellent stability. This research expands the potential of non-precious-metal photocatalytic co-catalysts for water treatment.
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Journal of Energy Storage
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2024
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IF 8.9
Yutao Zhang,Xiaohua Zhang,Pei Zhang,Yongqi Zhang,Peng Shi,Zhenxing Yue
Lead-free materials for energy storage are increasingly receiving attention due to their exceptional properties of high charging and discharging rates, high power density, and eco-friendliness. In this work, (1− x )Bi 0.5 Na 0.5 TiO 3 - x Bi(Ni 0.5 Hf 0.5 )O 3 (BNT-BNH, x = 0.05, 0.10, 0.15 and 0.20) ceramics were prepared for electrostatic energy storage. P - E loops results show that the introduction of Ni 2+ and Hf 4+ induces the formation of polar nanoregions (PNRs) and the phase transition from ferroelectric to relaxor ferroelectric in BNT ceramics. Transmission Electron Microscopy directly confirm the increase of crystal plane spacing implies a good solid solution of BNT-BNH, and the number of spherical PNRs increases significantly with increasing the BNH content. Herein, a recoverable energy storage density of 2.68 J/cm 3 and relative efficiency of 72.1 % are achieved for 0.8BNT-0.2BNH ceramics under 210 kV/cm. The 0.8BNT-0.2BNH ceramics also exhibit a fast discharge rate ( t 0.9 = 76 ns), high current density (403.1 A/cm 2 ), and high power density (12.85 MW/cm 3 ), which illustrates that BNT-BNH material systems have good application potential in electrostatic energy storage.
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ADVANCED MATERIALS
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2024
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IF 27.4
Qingquan Han,Xigang Gao,Chao Zhang,Yajie Tian,Sen Liang,Xin Li,Yafeng Jing,Milin Zhang,Anhe Wang,Shuo Bai
Conducting polymer hydrogels have gained attention in the bioelectronics field due to their unique combination of biocompatibility and customizable mechanical properties. However, achieving both excellent conductivity and mechanical strength in a hydrogel remains a significant challenge, primarily because of the inherent conflict between the hydrophobic nature of conducting polymers and the hydrophilic characteristics of hydrogels. To address this issue, this work proposes a simple one-step acid-induced approach that not only promotes the gelation of hydrophilic polymers but also facilitates the in situ phase separation of hydrophobic conducting polymers under mild conditions. This results in a distinctive bi-continuous phase structure with exceptional electrical property (906 mS cm −1 ) and mechanical performance (fracture strain of 1103%). The hydrogel forms robust percolating networks that maintain structural integrity under mechanical stress due to their entropic elasticity, providing remarkable strain insensitivity, low mechanical hysteresis, and an impressive resilience (95%). Electrodes fabricated from the conductive hydrogel exhibit stable and minimal interfacial contact impedance with skin (1–6 kilohms at 1–100 Hz) and significantly lower noise power (4.9 µV 2 ). This work believes that the motion-insensitive characteristics and mechanical robustness of this hydrogel will enable efficient and reliable monitoring of biological signals, establishing a new benchmark in the bioelectronics.
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高影响因子
ENVIRONMENTAL RESEARCH
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2024
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IF 7.7
Suo Wang,Changyu Li,Huanshun Yin,Bin Gao,Zhengkun Yu,Yunlei Zhou,Jun Wang,Hongxia Xu,Jichun Wu,Yuanyuan Sun
Currently, achieving dual applications of Bi 2 O 2 CO 3 -based photocatalysts in photocatalytic degradation and sterilization under visible-light conditions is challenging. In this study, a novel Ag/Bi/Bi 2 O 2 CO 3 visible-light photocatalyst with bimetallic doping and rich oxygen vacancies was successfully synthesized using a one-pot hydrothermal crystallization method. The existence of oxygen vacancies was verified by X-ray photoelectron spectroscopy (XPS) and Electron spin resonance (ESR) analysis. The experimental results showed that Ag/Bi/Bi 2 O 2 CO 3 killed ∼100% (log 7) of antibiotic-resistant Escherichia coli (AR- E. coli ) within 60 min and degraded 83.81% of tetracycline (TC) within 180 min under visible light irradiation. Moreover, Ag/Bi/Bi 2 O 2 CO 3 can still remove 61.07% of TC in water after 5 cycles, showing excellent photocatalytic cycle stability and reusability. The possible degradation pathway of TC was determined by liquid chromatography-mass spectrometry. It was found that the main active substances in the photocatalytic disinfection of AR- E. coli were 1 O 2 , h + , and ·OH, while 1 O 2 was the dominant active species in the photocatalytic degradation of TC. This study presents a promising Bi 2 O 2 CO 3 -based visible light photocatalyst for treating both antibiotics (TC) and antibiotic-resistant bacteria (AR- E. coli ) in water.
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BIOSENSORS & BIOELECTRONICS
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2024
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IF 10.7
Chunli Yang,Yanan Shi,Yuqing Zhang,Jiayang He,Zhihan Zhang,Xinyue Jia,Ruo Yuan,Wenju Xu
Constructing label-free bivariate fluorescence biosensor would be intriguing and desired for the recognizable and accurate detection of two specific DNA segments, yet the design of functional DNA structures with low overlapped interference might be challenging. Herein in this work, a double-faced J anus D NA n ano a rchitecture ( J DNA) with bi-responsive recognition regions on opposite sides was assembled, which consisted of two substrate strands and two template strands for loading green-/red-emissive Ag nanoclusters ( g AgNC and r AgNC) as bivariate signaling reporters. Of note, the hybridized double helix in the middle rationally oriented two flank faces and stabilized the rigid conformation of J DNA, while the template sequences of bicolor clusters were blocked to minimize non-specific background leakage. Upon inputting two targets, the discernible hairpins lost their hairpin structures due to forming two dsDNA complexes. They were executed to simultaneously invade J DNA for activating two individual target-recycled strand displacement (TRSD) events, guiding signal transduction and efficient amplification. Consequently, the clustering templates were unlocked via the tailored conformation switch of J DNA, in which g AgNC and r AgNC were in situ synthesized in two diagonal positions, thereby significantly emitting bi-responsive signal without cross interference. Benefited from the logic integration of double-faced J DNA and TRSD, a label-free, sensitive and specific bivariate fluorescence approach was developed, which would open a new avenue for the potential application in biosensing and bioanalysis.
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BIOSENSORS & BIOELECTRONICS
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2013
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IF 5.437
Yi Huang,Wen Wang,Zou Li,Xiaoli Qin,Lijuan Bu,Zhiyong Tang,Yingchun Fu,Ming Ma,Qingji Xie,Shouzhuo Yao,Jiming Hu
We report here on a facile enzymatic polymerization protocol to prepare enzyme—poly(thiophene-3-boronic acid) (PTBA) polymeric biocomposites (PBCs) for high-performance mono-/bi-enzyme amperometric biosensing. Horseradish peroxidase (HRP)-catalyzed polymerization of thiophene-3-boronic acid (TBA) monomer was conducted in aqueous solution containing HRP (or plus glucose oxidase (GOx)) by either directly added or GO x -glucose generated oxidant H 2 O 2 . The mono-/bi-enzyme amperometric biosensors were prepared simply by casting the dialysis-isolated PBCs on Au-plated Au electrode (Au plate /Au), followed by coating with an outer-layer chitosan (CS) film. The boronic acid residues are capable of covalent bonding with enzyme at the glycosyl sites (boronic acid-diols interaction), which should less affect the enzymatic activity as compared with the common cases of covalent bonding at the peptide chains, and UV–vis spectrophotometric tests confirmed that the encapsulated HRP almost possesses its pristine enzymatic specific activity. The enzyme electrodes were studied by cyclic voltammetry , electrochemical impedance spectroscopy and chronoamperometry in the presence of Fe(CN) 6 4− mediator. The CS/HRP–PTBA/Au plate /Au electrode responded linearly to H 2 O 2 concentration from 1 to 300 μM with a sensitivity of 390 μA mM −1 cm −2 and a limit of detection (LOD) of 0.1 μM. The bienzyme CS/GO x −HRP−PTBA(H 2 O 2 )/Au plate /Au electrode responded linearly to glucose concentration from 5 μM to 0.83 mM with a sensitivity of 75.1 μA mM −1 cm −2 and a LOD of 1 μM, and it is found here that the use of Fe(CN) 6 4− that can only efficiently mediate HRP favorably avoids the “unusual amperometric responses” observed when other mediators that can efficiently turn over both HRP and GO x are used.
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Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Yuyan Wang,Hongxia Zhang,Wei Gao,Ming Zhong,Bitao Su,Ziqiang Lei
In this work, two series of plasmonic S-type heterojunction photocatalysts containing Bi, TiO 2 , and biochar (Bi/TiO 2 @C) have been developed through a biomass-assisted hydrothermal-calcination strategy, utilizing grapefruit peel as a reducing agent and C resource. The calcination temperature and the mass ratio of biomass were optimized to obtain the optimal nanocomposite, which shows excellent adsorptive and visible-light photocatalytic performance in the removal of diverse antibiotic and dye pollutants, including tetracycline, oxytetracycline, ciprofloxacin, sulfamethoxazole, sulfisoxazole, malachite green, and rhodamine B. The remarkable performance can be attributed to the enhanced absorption of light absorption resulting from the localized surface plasmon resonance effect of the semimetal Bi, and the formation of heterogeneous interface between Bi and TiO 2 , which accelerates the transfer of photogenerated charge. Furthermore, trapping tests and electron spin resonance (ESR) analysis reveal that ∙O 2 - and h + are the primary active species involved in the removal of tetracycline. A plausible charge transfer mechanism has been proposed.
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Journal of Inorganic and Organometallic Polymers and Materials
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2024
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IF 3.9
Ji Yufeng,Zou Congyang,Wang Yong,Zhou Zhuyou,Liu Menghe,Xu Ying,Liu Ruijie,Yang Minjie
In this study, a novel photocatalyst composed of silver phosphate (Ag 3 PO 4 ) and bismuth-based organic framework (Bi-MOF) were synthesized via chemical precipitation at room temperature, and the photocatalytic degradation of pollutants under visible light irradiation was conducted to evaluate their photocatalytic performance. The composite materials exhibited significantly enhanced photocatalytic activity compared to pure Bi-MOF and Ag 3 PO 4 , with APBM-1/1 performing the most effectively. The degradation efficiencies of rhodamine B (RhB) and tetracycline hydrochloride (TCH) were 99% and 86.9% within 50 min and 30 min of light exposure, respectively. The construction of a unique p-n heterojunction interface between Ag 3 PO 4 and Bi-MOF significantly enhanced the efficiency of interfacial charge separation, leading to exceptional photocatalytic activity. Capture experiments and electron paramagnetic resonance (EPR) were conducted, revealing that photogenerated holes (h + ) and superoxide radicals (·O 2 − ) were the primary active species involved in the degradation reaction. Based on these findings, a plausible mechanism for the photocatalytic process was proposed.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Lan Yang,Junyu Zhao,Chengyang Wang,Ruotong Pang,Daming Wang,Xiaogang Zhao,Chunhai Chen
Nowadays, the polymer-based composites with excellent thermal-conductive ability and ideal electromagnetic interference shielding performance are in great demand with the advent of developing modern electronic technology. However, most conventional thermal-conductive materials were typically designed to enhance thermal conductivity in just one single direction (through-plane or in-plane direction), which will be inadequate to meet increasing heat-dissipation requirements. Hence, polyetherimide/Silver (PEI/Ag) composites with unique segregated thermal-conductive network were fabricated via hot-pressing the core–shell (PEI@Ag) particles, which was endowed with superior thermal-conductive ability in bi-directions. By this process, the Ag shell was deposited on the surface of various polymer microsphere, and diverse morphology of composite particles would lead to different findings. The results show the PEI@Ag composites with filler content of 18.9 vol% exhibited high in-plane thermal conductivity and through-plane thermal conductivity of 19.9 and 14.0 W/mK, respectively. Particularly, these results achieved obvious improvements of 331 % and 1264 % higher than the composites with filler random distribution, indicating the composite materials obtained outstanding advantage in both horizontal and vertical direction. The research also found that the composites prepared from PEI@Ag core–shell structures possess better properties than those prepared with Ag nanoparticles growing on polymers, indicating the importance of continuous heat-transfer path, and their heat transfer behavior was further demonstrated by finite element analysis. Besides, the composites also exhibited remarkable EMI shielding performance (40.1 dB)). In a word, this study provides viable strategies to enhance the thermal conductivity of composites based on organic solvent-soluble polymer with EMI capability for the development of electronic devices.
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Science China-Materials
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2024
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IF 6.8
Zhang Baichao,Cao Xuchuan,Suo Chao,Cui Jing,Duan Xiaochuan,Guo Shaohui,Zhang Xian-Ming
Utilizing plasmonic non-noble metal nanoparticles (NPs) for photocatalytic hydrogen evolution reaction is a significant step toward green energy production. However, optimizing the interface between non-noble metal NPs and semiconducting materials in metal-semiconductor composites remains challenging owing to the inevitable surface oxide layers of non-noble metal NPs because the surface oxide layers of non-noble metal NPs can suppress the transfer of photoinduced carriers, leading to poor photocatalytic performance. Herein, we propose a photoinduced interface activation strategy to reduce the number of oxide layers based on a dynamic charge-transfer mechanism under illumination conditions, with Bi NPs and a Ni-based metal-organic framework (MOF) selected as model materials. Under light illumination, the photoinduced charges and plasmonic hot electrons heavily pooled at the interface between the Bi NPs and Ni-MOF, resulting in the reduction of the oxide layer on the surface of Bi, thus attenuating its hindering effect on charge transfer. This phenomenon led to a dynamically enhanced carrier concentration in the Bi/Ni-MOF composite, with an outstanding photocatalytic hydrogen evolution rate of 5822 µmol g −1 h −1 achieved with the composite. The results of this study indicate that our strategy provides a new method for optimizing plasmonic non-noble metal Bi NPs with oxide layers.
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CRYSTAL GROWTH & DESIGN
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2025
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IF 3.4
Chenglin Zhang,Jiangpeng Li,Qiuchen He,Ziming Zhao,Wenjun Jiang,Su Zhan,Feng Zhou
Deactivating the concentration of marine microorganisms is suitable and proper for ballast water treatment. In here, a promising strategy has been presented to create massive oxygen vacancies synergistic with metallic Bi nanoparticles on ZnWO4 for inactivating marine bacteria in seawater, demonstrating that the paramount incorporation of metallic Bi nanoparticles and 2BZWO (Bi/ZnWO4) samples exhibits superior photocatalytic sterilization, in which the sterilization efficiency of 2BZWO is 2.83 times that of pure ZnWO4. The co-incorporation of metallic Bi nanoparticles and oxygen vacancies significantly enhanced the absorption of visible light and enrichment of the photogenerated electrons, promoting the separation of charge carriers. Moreover, first-principles calculations demonstrate that the coeffect of metallic Bi nanoparticles and oxygen vacancies guided the reconfiguration of the active sites and electrons flowing direction. Results from this study provide a creative strategy on controllable Bi/ZnWO4 synthesis to manipulate the photocatalytic inactivation of marine bacteria.
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