Catalysts
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2020
·Vol. 10
·期 12
·1425
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IF 3.52
Jingbang Sun,Ni Han,Yan Gu,Xiaowang Lu,Liang Si,Qinfang Zhang
An increase of carrier concentration is one of the most important routes for enhancing the catalytic performance of semiconductor photocatalysts. In this study, the Sillén–Aurivillius oxychloride Bi4NbO8Cl with hole doping was successfully prepared by a solid-state reaction method. X-ray powder diffraction (XRD), scanning electron microscopy (SEM), ultraviolet–visible diffuse reflectance spectra (UV–vis DRS), X-ray photoelectron spectrometry (XPS) and photoluminescence spectra (PL) were used to characterize and analyze the prepared samples. The experimental results and density functional theory calculations demonstrate that hole doping can be formed in Bi4NbO8Cl by inserting zinc into the niobium site, and the photocatalytic activity can be improved by introducing additional holes into Bi4NbO8Cl. The photogenerated hole (h+) is considered to be the main active species to degrade trypan blue (TB) through trapping experiments. The optimal photocatalyst of Bi4Nb0.8Zn0.2O8Cl exhibits excellent photocatalytic activity in degradation of trypan blue under visible light irritation. Moreover, a possible photocatalytic degradation mechanism is discussed according the experimental and analytical results.Keywords:Bi4NbO8Cl;hole doping;visible light;photocatalytic degradation
研究领域:
材料科学
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环境科学
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DOI
高影响因子
ANALYTICAL CHEMISTRY
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2017
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IF 6.32
Yi-Fan Ruan,Nan Zhang,Yuan-Cheng Zhu,Wei-Wei Zhao,Jing-Juan Xu,Hong-Yuan Chen
We have developed sensitive photoelectrochemical (PEC) detection of cysteine using the gold nanoparticles (Au NPs) equipped perovskite Bi4NbO8Cl heterostructure. The Bi4NbO8Cl was prepared by a solid-state reaction, and the Au NPs/Bi4NbO8Cl electrode was made through the electrostatic layer-by-layer self-assembly technique. The Au NPs/Bi4NbO8Cl electrode provided much enhanced photocurrent with a great increase compared to the bare Bi4NbO8Cl electrode and allowed for the plasmon-enhanced PEC detection of cysteine with good performance. It demonstrated rapid response, high stability, wide linear detection range and certain selectivity, implying its great promise in its application. Therefore, the Au NPs/Bi4NbO8Cl heterostructure has provided a promising platform for the development of PEC bioanalysis. More generally, these findings offered an insight into the exploitation of perovskite materials for PEC bioanalytical purposes.
研究领域:
生物分析学
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材料科学
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Yutong Chen,Rong Wu,Jianyong Yue,Dezheng Kong,Chen Zhang,Shunhang Wei
Photocatalytic overall water splitting (POWS) is an efficient technology that converts solar energy into H 2 energy, holding significant importance in the realms of energy and the environment. As a visible-light photocatalyst, ZnIn 2 S 4 , despite being an ideal low-dimensional semiconductor for photocatalytic overall water splitting, has its performance therein affected by poor charge separation. The present study reports the successful synthesis of a novel Bi 4 NbO 8 Cl/ZnIn 2 S 4 :Mo Z-scheme heterojunction via a hydrothermal method. Under AM 1.5G irradiation, the POWS H 2 evolution rate was measured at 84.8 μmol g −1 h −1 , while the O 2 evolution rate was determined to be 47.0 μmol g −1 h −1 . Under simulated solar light irradiation, Bi 4 NbO 8 Cl/ZnIn 2 S 4 :Mo heterojunction exhibits an apparent quantum efficiency (AQE) of 0.22 % at 420 ± 20 nm and a solar-to-hydrogen (STH) conversion efficiency of 0.026 %. UV–Vis–NIR spectroscopic analysis unequivocally demonstrated a significant enhancement in the utilization efficiency of the Bi 4 NbO 8 Cl/ZnIn 2 S 4 :Mo Z-scheme heterojunction in the near-infrared light region compared to the pristine ZnIn 2 S 4 and Bi 4 NbO 8 Cl. This improvement extends the spectral absorption boundary of the photocatalyst, allowing efficient capture of a considerable proportion of low-energy photons in sunlight. Unique charge transfer mechanism of Z-scheme heterojunction was revealed by in-situ XPS and EPR tests. Z-scheme heterojunction effectively promoted the respective enrichment of electrons and holes generated by photo-excitation in ZnIn 2 S 4 :Mo and Bi 4 NbO 8 Cl, thereby improving the performance of POWS. This study not only establishes an experimental foundation for the design and construction of Z-scheme heterojunctions but also explores a new approach to augment the utilization efficiency of the near-infrared solar spectrum.
研究领域:
材料科学
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环境科学
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能源科学
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DOI
高影响因子
Journal of Energy Chemistry
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2023
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IF 13.1
Kailong Gao,Hongxia Guo,Yanan Hu,Hongbin He,Mowen Li,Xiaoming Gao,Feng Fu
The efficiency of photocatalytic overall water splitting was mainly limited by the slow reaction kinetics of water oxidation. How to design effective surface active site to overcome the slow water oxidation reaction was a major challenge. Here, we propose a strategy to accelerate surface water oxidation through the fabrication spatially separated double active sites. FeCoPi/Bi 4 NbO 8 Cl - OVs photocatalyst with spatially separated double active site was prepared by hydrogen reduction photoanode deposition method. Due to the high matching of the spatial loading positions of FeCoPi and OVs with the photogenerated charge distribution of Bi 4 NbO 8 Cl and corresponding reaction mechanisms of substrate, the FeCoPi and OVs on the (001) and (010) crystal planes of Bi 4 NbO 8 Cl photocatalyst provided surface active site for water oxidation reaction and electron shuttle reaction (Fe 3+ /Fe 2+ ), respectively. Under visible light irradiation, the evolution O 2 rate of FeCoPi/Bi 4 NbO 8 Cl OVs was 16.8 μmol h −1 , as 32.9 times as Bi 4 NbO 8 Cl. Furthermore, a hydrogen evolution co-catalyst PtRu@Cr 2 O 3 was prepared by sequential photodeposition method. Due to the introduction of Ru, the Schottky barrier between PbTiO 3 and Pt was effectively reduced, which promoted the transfer of photogenerated electrons to PtRu@Cr 2 O 3 thermodynamically, the evolution H 2 rate on PtRu@Cr 2 O 3 /PbTiO 3 increased to 664.8 times. On based of the synchronous enhancement of the water oxidation performance on FeCoPi/Bi 4 NbO 8 Cl-OVs and water reduction performance on PtRu@Cr 2 O 3 /PbTiO 3 , a novel Z - Scheme photocatalytic overall water splitting system (FeCoPi/Bi 4 NbO 8 Cl-OVs) mediated by Fe 3+ /Fe 2+ had successfully constructed. Under visible light irradiation, the evolution rates of H 2 and O 2 were 2.5 and 1.3 μmol h −1 , respectively. This work can provide some reference for the design of active site and the controllable synthesis of OVs spatial position. On the other hand, the hydrogen evolution co catalyst (PtRu@Cr 2 O 3 ) and the co catalyst FeCoPi for oxygen evolution contributed to the construction of an overall water splitting system.
研究领域:
材料科学
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光催化
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能源转换
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DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
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2021
·
IF 10.618
Jia Ding,Yunlei Zhou,Qian Wang,Shiyun Ai
As an important epigenetic modification , 5-hydroxymethylcytosine (5hmC) aroused wide concern about the distribution and the function. Due to the necessity of 5hmC detection, a novel photoelectrochemical (PEC) biosensor was established based on the in-situ generated heterojunction of Bi 4 NbO 8 [email protected] 2 S 3 , which was employed as the substrate material with excellent photoelectric property . The specific recognition of 5hmC relied on the covalent reaction between –CH 2 OH of 5hmC and –SH on the substrate electrode under the catalysis of M.HhaI methyltransferase . Afterwards, ZrO 2 was used as signal amplification unit capturing by the specific reaction of Zr with the phosphate group of 5hmC. The experimental results demonstrated well specificity and sensitivity of this biosensor. Under optimal conditions, the linear relationship between the photocurrent and the logarithm value of 5hmC concentration was constructed with the range from 0.3 to 300 nM and the detection limit of 0.0779 nM (S/N = 3). The procedures of constructing this biosensor were compact and convenient, and this biosensor realized actual detection of 5hmC level in wheat sample. Significantly, this biosensor was applied to a preliminary study that the heavy metal Pb 2+ and the perfluorooctanoic acid influence the expression of 5hmC in the genomic DNA of wheat seedling roots and leaves.
研究领域:
生物化学
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分析化学
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环境科学
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植物生物学
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表观遗传学
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PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Jia Ding,Fei Liu,Chunling Qi,Yunlei Zhou,Huanshun Yin,Shiyun Ai
A novel photoelectrochemical (PEC) biosensor was constructed for DNA hydroxymethylation detection based on Bi 4 NbO 8 Cl/PTC-NH 2 heterojunction and Fe-MIL-88NH 2 , where Bi 4 NbO 8 Cl/PTC-NH 2 was employed as photoactive material and Fe-MIL-88NH 2 was adopted as artificial hydrogen peroxide mimic enzyme. Based on the structure of hydroxymethylated cytosine in DNA sequence, 5-hydroxymethyl-2’-deoxycytidine (5hmdC) was employed as detected target molecule for the first time using PEC technique. After Bi 4 NbO 8 Cl/PTC-NH 2 heterojunction was modified on the substrate electrode, thioglycolic acid (TGA) was captured by forming amide bond, where the sulfhydryl group (-SH) of TGA was employed as the specific recognition of 5hmdC. Under M. HhaI catalysis, the −CH 2 OH of 5hmdC reacted selectively with the –SH. Finally, Fe-MIL-88NH 2 was modified on the electrode based on the crosslinker of 4-formylphenylboronic acid (FPBA), where FPBA possessed two active groups of formyl and boronic acid group, reacting with glycosyl of 5hmdC and amino of Fe-MIL-88NH 2 . Under the catalysis effect of Fe-MIL-88NH 2 , the insoluble substance was produced on the surface of electrodes, resulting in distinct lessening of PEC response. Under optimal conditions, the photocurrent shows a linear relationship with the logarithm value of 5hmdC concentration from 0.01-100 nM with a low detection limit of 6.48 pM. More importantly, this method can be applied to investigate the influence of exogenous phytohormone on 5hmdC content in the genomic DNA of rice seedling roots and leaves.
研究领域:
材料科学
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分析化学
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生物传感器
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生物化学
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纳米技术
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电化学
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基因组学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2026
·Vol. 61
·期 15
·10173-10191
·
IF 4.4
Liu Zeng,Wu Fang,Zheng Liwei,Sun Xu,Xia Chenghui,Song Hongbing,Zhang Shuai,Qu Xiaofei,Shi Liang
Core–shell Bi 4 NbO 8 Cl@C plate-like heterostrutured photocatalysts were successfully prepared by one-step hydrothermal process, during which glucose solution exhibited reducibility and created amounts of oxygen vacancies for Bi 4 NbO 8 Cl, while a carbon layer was in situ deposited on Bi 4 NbO 8 Cl by glucose decomposition. The structure of Bi 4 NbO 8 Cl was stabilized and armored by the thickness-tailored C layer, which provides a superior performance in the removal of acidic Cr(VI)-contained contaminant water, and the optimal Bi 4 NbO 8 Cl@C achieved 373 folds than pristine Bi 4 NbO 8 Cl in photocatalytic Cr(VI) removal. Experimental results and density functional theory (DFT) calculations show that C layer is tightly coated on the surface of BNC. Furthermore, C–O covalent bonds, which act as electron transfer channels, are formed at the interface of BNC and C layer. This study provides an important reference for the synthesis of core–shell structured photocatalysts and the efficient removal of Cr(VI) from industry wastewater. Graphical
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高影响因子
TALANTA
·
2024
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IF 5.6
Haoran Cheng,Yifan Wang,Yirui Zhao,Hongman Hou,Gongliang Zhang,Jingran Bi,Shuang Yan,Hongshun Hao
Salmonella enteritidis ( SE ) is a food-borne pathogens that can cause acute gastroenteritis. With the increasing social attention to food safety, the detection method of SE has attracted wide attention. In response to the demand for efficient detection methods of SE , this study constructed a novel dual-mode photoelectrochemical-electrochemical (PEC-EC) aptamer-based biosensor. The sensor was constructed using Bi 4 NbO 8 Cl/In 2 S 3 heterojunction as the electrode substrate material, the hybridization chain reaction (HCR) and dye sensitization were used as the signal amplification strategies. Bi 4 NbO 8 Cl/In 2 S 3 heterojunction could provide an excellent initial photocurrent response for the sensing platform, and the HCR was opened by the end of complementary DNA (cDNA) and generated an ultra-long DNA double-stranded (dsDNA) “super structure” on the surface of the electrode, which could be embedded with a large number of methylene blue (MB) as the bifunctional probes. Thus, dual-mode output was achieved via the PEC and EC activity of MB. Under the optimized conditions, the PEC and EC signal responses of the system were linear to the logarithm of SE concentration in a range from 1.5 × 10 2 CFU/mL to 1.5 × 10 7 CFU/mL. The detection limits were found to be 12.9 CFU/mL and 12.3 CFU/mL using the PEC and EC methods, respectively. The constructed dual-mode biosensor exhibited good performance for real sample analysis, and demonstrated great application potential in the field of SE rapid detection. Moreover, this dual-mode detection strategy provided more accurate and reliable results than the single-mode output.
研究领域:
食品科学
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生物传感技术
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微生物检测
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）