ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Yanhua Wu,Yudi Wang,Jialong Duan,Xiya Yang,Jihua Zhang,Liming Liu,Qunwei Tang
The interaction between solvent molecules and lead halides in precursor solution is important in controlling perovskite film morphology and crystallization process , which determines the photovoltaic performances of solar cells. Herein, we demonstrate two organic solvent molecules, acetonitrile (ACN) and N -methyl-2-pyrrolidone (NMP) with adverse coordinating capacity to Pb 2+ center, as precursor additives to control the interaction between dimethyl formamide (DMF) and PbBr 2 and therefore the crystallization process of CsPbBr 3 films. By carefully varying the concentration of additives (ACN and NMP) in DMF solutions, the final perovskite films with markedly enlarged grains are obtained in both scenarios owing to the tuned bonding strength of PbBr 2 -DMF complexes and grain growth dynamics. Upon assembling into all-inorganic CsPbBr 3 perovskite solar cells, the optimized power conversion efficiencies of 9.22% and 9.53% are obtained for ACN- and NMP-containing devices, which are much higher than that of control device with average 7.38%-efficiency. More importantly, the optimal device free of encapsulation exhibits excellent stability under persistent attack at 40 °C and 90% relative humidity over 30 days. The improved perovskite film quality and device performances may pave the way for full-bromine perovskite solar cells in the future.
研究领域:
材料科学
·
太阳能
·
化学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Ying Xu,Shuili Yu,Zhiqiang Fan,Cong Huang,Lei Li,Rui Liu,Zheng Xu
Zero-valent bismuth (Bi) nanospheres with a hollow structure were synthesized via a polyvinylpyrrolidone (PVP)-assisted solvothermal method and applied as efficient photocatalysts for the sacrificial-agent-free photoreduction of bromate (BrO 3 - ) under ultraviolet (UV) irradiation. The optimized Bi-0.6 catalyst exhibited a narrowed band gap and enhanced charge separation efficiency, achieving 99.5 % BrO 3 - removal within 30 min at neutral pH. Comprehensive photoelectrochemical analysis revealed that the in-situ self-oxidation of Bi 0 to Bi 3+ served as an intrinsic hole scavenging pathway, suppressing charge recombination and sustaining electron availability without needing external reductants. In addition to the rapid reduction of BrO 3 - , a significant decrease in total bromine concentration was observed, which is attributed to the incorporation of bromide (Br - ) into Bi 24 O 31 Br 10 crystalline phases, effectively mitigating the risk of secondary disinfection byproducts. The Bi-0.6 nanospheres also exhibited excellent stability and recyclability over multiple reaction cycles and retained high activity in real water (RW) matrices containing organic matter and competing anions. These results highlight the dual functionality of zero-valent Bi nanospheres in enabling efficient pollutant removal and total bromine mitigation through a self-regulating photocatalytic process. This work presents a sustainable and practical strategy for BrO 3 - remediation and provides insights into the design of environmentally compatible photocatalytic systems for safe water treatment applications.
研究领域:
环境科学
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纳米技术
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材料科学
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水处理技术
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光催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Tianyuan Xiao,Jiahui Song,Wenchao Jia,Yanning Sun,Yanzhu Guo,Pedram Fatehi,Haiqiang Shi
The chemical bond cleavage of lignin is a research focus for achieving depolymerized lignin for such applications as adhesives, fuels, fertilizers, etc. The depolymerization of an industrially available sustainable material, i.e., industrial alkali lignin, in LiBr·3H 2 O/HBr-γ-valerolactone (GVL) was systematically investigated in this study. It was observed that using 3/1 mL/g of HBr/lignin and 8/1 mL/g of GVL/lignin at 110 °C for 90 min, i.e., optimized conditions, resulted in lignin derivatives with an M w of 1889 g/mol and M n of 895 g/mol. The characteristics of the products were studied using FTIR, NMR, SEM, and DLS techniques. The results confirmed that the Hibbert-ketone end group was formed, while the structure of the aromatic ring was not changed on the depolymerized lignin. After the depolymerization process, the hydroxyl content in lignin increased from 1.91 mmol/g to 2.96 mmol/g. The product derived from the LiBr·3H 2 O/HBr-GVL depolymerization system displayed a spherical particle morphology. The addition of GVL to lignin depolymerization processes improved the bonding between lignin and inorganic molten salts, thereby promoting the acid-catalyzed cleavage of aryl ether bonds in lignin. Current research supports the conclusion that LiBr·3H 2 O/HBr-GVL lignin depolymerization is a sustainable and effective chemical pathway for generating depolymerized lignin.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Shengpeng Liu,Gen Cheng,Yun Xiong,Yigang Ding,Xiaogang Luo
Due to strong activity, it is very difficult to remove low concentrations of bromide in medical wastewater by traditional method, thus highly effective and greener adsorbents should be utilized to design. In this work, the cellulose beads (CBs) were modified by the TEMPO-mediated oxidation and then bonded with Fe 3+ to fabricate Fe(III)-complexed carboxylated cellulose beads (Fe-CCBs) adsorbents. Structure and properties of Fe-CCBs were analyzed using Energy dispersive spectrum (EDS), Scanning electron microscopy (SEM), Fourier transform infrared spectrum (FT-IR), total acidity and basicity groups, X-ray diffraction (XRD), N 2 adsorption-desorption and Thermogravimetric (TGA). Moreover, batch adsorption experiments showed that the adsorption of Br − was better consistent with general-order kinetic model and Liu isotherm model, which could also further clarify the adsorption process mechanism. Meanwhile, the results revealed that removal of Br- was a spontaneous exothermic process and was more suitable to be carried out under neutral or acidic conditions. Furthermore, the mechanism of adsorption behavior of bromide ions on Fe-CCBs was based on a combination of electrostatic attraction and outer-sphere complexation. The results of this study can provide guidance for the design of novel material adsorbents and the removal of harmful anions from aqueous solutions.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2015
·
IF 3.545
Wen Sun,Hui Li,Han Wang,Shan Xiao,Jihui Wang,Liang Feng
The sensitivity of pH indicators is always confined in acidic solvents used during the immobilization because of the large deviation from their color transition points. By regulating the pH of indicators using organic acid or base, the color transition points of indicators could be readily achieved and the sensitivity could be greatly enhanced. In this study, bromophenol blue was selected as an example to interpret this improvement. And Hue, Saturation and Value (HSV) color model was applied to obtain digital color information of pH indicators. In addition, other two kinds of pH indicators were chosen and regulated to their color transition points as well. The resultant indicators together with the original ones were composed to a colorimetric sensor array and utilized to determine fish freshness. Compared with the original indicators, much higher sensitivity in the detection of fish freshness was obtained by the pH regulated indicators.
研究领域:
食品科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Rui Wu,Hao Yang,Meifeng Jiang,Hui Tong,Xinyu Hu,Ziyang Liu,Chunhua Luo,Hui Peng,Hechun Lin
Stimuli-responsive photoluminescent materials have garnered considerable attention due to their immense potential in enhancing security protection. However, achieving high-level multimodal anti-counterfeiting remains a challenge. In this work, we report on water-triggered stimuli-responsive luminescent crown-ether coordinated cuprous bromides (CCB) for multi-functional applications. The CCB powders were synthesized via mechano-chemical grinding CuBr, NaBr and 18-crown-6 ether (18C6) together. Depending on the amount of 18C6 incorporated into the reaction, the blue and green emission composites were obtained, respectively. Upon contact to water and subsequent thermal dehydration, both powders exhibit a fascinating cyclic and reversible transformation in their emission hues, seamlessly alternating between blue/green and orange. The three distinct emission states were identified and characterized as (18C6)NaCuBr 2 , (18C6) 2 Na(H 2 O) 2 CuBr 2 , and (18C6) 2 Na 2 (H 2 O) 3 Cu 4 Br 6 , respectively. These unique luminescent properties, coupled with their swift and repeatable stimuli-responsive behavior, position CCBs as novel and highly promising functional materials for applications in dynamic information storage and encryption. Based on CCBs, multi-modal anti-counterfeiting patterns and rewritable luminescent paper were successfully fabricated. Additionally, crown ether species and alkali metal ions exert a remarkable influence on the photophysical properties of CCBs. This research provides a novel strategy to develop multi-modal anticounterfeiting applications, expanding the horizons of security and authentication technologies.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Fangxian Wang,Junwei Yang,Shihao Li,Junwen Liang,Yuwei Wang,Rong Du,Bo Zhou,Qiong Liu,Changping Li
Bromate is a commonly identified carcinogenic and genotoxic disinfection byproduct in water. Electrochemical debromination is an environmentally friendly and effective approach but it often suffers the limited reducing atomic H (H*) ability and high metal catalyst dosage. In this study, a unique composite catalyst comprised of ultra-low loading Cu single atoms (0.016 wt%) and Fe 2 O 3 nanoparticles supported on a Nb 2 C MXene (denoted as Cu 0.2 /Fe 0.1 /Nb 2 C) was synthesized by one-step high-temperature molten salt method. The Cu 0.2 /Fe 0.1 /Nb 2 C significantly outperformed the Nb 2 C, Cu 0.2 /Nb 2 C and Fe 0.1 /Nb 2 C counterparts in the electrochemical debromination with a 94.2 % removal efficiency of bromate. It is revealed that the introducing of Cu single atoms, efficiently promotes the adsorption of H* and inhibition of competitive H 2 evolution. The incorporation of Fe 2 O 3 nanoparticles significantly increased the electronic metal-support interaction effect between the metal components and Nb 2 C, thereby forming a noticeable electronic cloud bridge to facilitate efficient charge transfer. Ultimately, the synergistic interplay between Cu single atoms and Fe 2 O 3 nanoparticles plays a crucial role in achieving the remarkable removal performance of bromate. This work not only presents a significant instance of a synergistic catalyst involving metal single atoms and metal nanoparticles for effective electrochemical debromination but also advances the understanding of the electronic metal-support interaction.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY
·
2025
·
IF 9.4
Xiaohua Li,Zhitao Lei,Yu Cao,Shanshan Shao,Shiliang Wu
The cycloketones were prepared efficiently via the selectively hydrogenation of aqueous phase lignin-derived single phenolic monomer and mixtures. The yield and selectivity of cycloketones was greatly improved over Br modified metal-acid mixed catalyst (PdH5@Br). First, the effect of side-chain functional structures on the aqueous-phase hydrogenation of phenols with Pd/C catalysis was investigated and it was found that the benzene ring with methyl group attached is more easily hydrogenated, and the phenolic hydroxyl side chain was more susceptible to form carbonyl than methoxy groups. A large number of enols existed, thus the catalyst acidity was adjusted by extra addition of HZSM-5, over which the yield of cycloketones from guaiacol was significantly boosted to 67.9%. Subsequently, the electronic properties of catalyst were altered by adding Br over Pd catalyst, weakening the over-chemisorption of intermediate phenol, and the hydrogenating of phenol under PdH5 were enhanced, thus an increased yield of cycloketone of 18.4% occurred. After the hydrotreating of guiaiacol for 2 h at 523 K and 2 MPa H 2 , the yield of cycloketone reached 80.4% on PdH5@Br. The hydrotreating performance of PdH5@Br with lignin-derived phenolic monomer mixtures as the feedstock was also tested, and it presented great universality and stability. It provides an efficient catalyst system and promising technological ideas for biomass hydrotreating.
研究领域:
化学工程
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可再生资源转化
✓ 已验证
产品关联
DOI
高影响因子
Foodborne Pathogens and Disease
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2024
·
IF 1.9
Ji Zeng,Rong Fu,Jiahao Ji,Tong Xing,Dongping Hou,Zefeng Li,Zepeng Zhao,Shaoting Li,Hongmei Zhang
Salmonella enterica is a common foodborne pathogen that poses significant safety risks across the world. And benzalkonium bromide (BK) is widely used as a disinfectant to sterilize the food processing equipment. It has been reported that sub-lethal concentration of disinfectants induced not only the homologous resistance but also cross-resistances. This work analyzed the induced resistances of Salmonella Enteritidis by short-term adaptation (STA) and long-term adaptation (LTA) to BK. We have demonstrated that inefficient sterilization exposes Salmonella Enteritidis to sub-lethal concentrations of BK, and adapts bacteria to a higher minimum inhibitory concentration and minimum bactericidal concentration. In addition, STA, but not LTA, to BK induced heterogeneous resistance to sodium hypochlorite, and cross-resistance to freezing, desiccation, and heating, which may be caused by the membrane composition change of Salmonella Enteritidis. This work could be useful to the optimization of cleaning protocol.
研究领域:
食品安全
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微生物学
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消毒剂研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jianxing Liu,Zhe Li,Lin Nie,Xiangxin Xue,Mao Liu
Photocatalytic nitrogen fixation is a promising long-term strategy for NH 3 synthesis, with the development of effective and durable photocatalysts being crucial for achieving high-efficiency N 2 to NH 3 conversion. In this study, we employed vacancy and interface engineering to create bismuth (Bi) nanoparticles on hierarchical oxygen-deficient BiOBr microspheres using a one-step solvothermal approach. These Bi-decorated BiOBr microspheres, featuring oxygen vacancies, achieved a high photocatalytic ammonia synthesis rate of 222.3 μmol·g −1 ·h −1 in pure water under visible light irradiation, which is 3.25 times higher than that of the original BiOBr. Atomic-scale images of the interface between the defective regions of BiOBr and the Bi cocatalyst and several other material characterizations confirmed that the enhanced photoreduction activity of Bi/BiOBr is due to the synergistic effects of the metal Bi and the oxygen vacancies. These results present a straightforward and practical method for designing efficient photocatalysts for nitrogen fixation.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 16
·5934-5940
·
IF 5.7
Tianyu Wang,Shuwen Xin,Yaoyu Liu,Zongshuai Ji,Guanfeng Liu,Shuai Zhang,Tianhua Wang,Fengyun Wang,Bing Teng,Shaohua Ji
Metal halide perovskites are extensively utilized in photoluminescence and photoelectric detection, owing to their modifiable band gap, elevated quantum yield, high absorption coefficient, superior charge transport properties, versatile chemical synthesis, and cost-effective manufacturing. Among the perovskite variants, bismuth–halide perovskites have emerged as a promising lead–halide alternative, garnering increasing interest for crafting non-toxic perovskites in optoelectronic applications. Nonetheless, the rapid and straightforward production of high-quality single crystals remains a challenge. This paper introduces an enhanced antisolvent crystallization method for fabricating high-quality Cs3Bi2Br9 single crystals measuring 3 × 3 mm. These crystals exhibit a remarkably low half-peak width of the X-ray diffraction swing curve at just 0.048°, maintaining stability without phase decomposition for 180 days at room temperature under air exposure. The photodetector constructed involves an aluminum electrode deposited onto the crystal surface. Utilizing 375 nm ultraviolet light as the excitation source, the device demonstrates a swift electrical response (sensitivity: 8.41 × 102), achieving the rise and decay times of the Cs3Bi2Br9 single crystal detector of 96 and 80 milliseconds, respectively. This research holds significant promise for advancing perovskite crystal preparation and photodetection techniques, particularly in the realm of bismuth-based perovskites.
研究领域:
材料科学
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光电技术
✓ 已验证
产品关联
DOI
高影响因子
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2024
·
IF 2.7
Shiwei Xue,Huiling Ding,Zhenghao Xia,Hengbin Mao,Sibo Zhao,Hailong Wang,Bingbing Fan,Gang Shao,Hongliang Xu,Hongxia Lu
Light Emitting Diodes (LEDs) are the key to new generation displays. New semiconductor electron–hole recombination layer is the key to high-performance LEDs. Although all-inorganic quantum dot (QD) materials have the advantages of wide color gamut and narrow emission peaks, they face issues of toxicity of heavy metal ions and stability of QDs, the synthesis method is highly polluting and difficult to achieve industrial production. Thereby, lead-free all-inorganic phosphor with narrow FWHM needs to be explored. A new synthesis method is required to be investigated. All-inorganic Mn 2+ bromide (Cs 3 MnBr 5 ) is easy to synthesize and has low toxicity and superior luminescent properties. However, most synthesis methods rely on liquid-phase reaction systems and cannot achieve highly efficient synthesis. High-energy ball milling is an efficient method and has enormous potential for industrial production. In this paper, this method is used to synthesize Cs 3 MnBr 5 , and then Cs/Mn ratio, ball milling time, and ligand usage are studied. Furthermore, a new phase transformation of all-inorganic Mn 2+ bromide is discovered, and the mechanism of high-energy ball milling is interpreted combining with phase transformation process. This article brings a new method to synthesis of all-inorganic Mn 2+ bromide, explains the mechanism of ball milling, and expands the phase transformation of all-inorganic Mn 2+ bromide.
研究领域:
材料科学
·
光学工程
✓ 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）