JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Wen Ge,Kong Liu,Peizhi Yang,Shukang Deng,Lanxian Shen
In this work, W 6+ ions doped Bi 2 MoO 6 :20%Yb 3+ , 2%Er 3+ samples were successfully synthesized by a facile and modified hydrothermal method . The main morphology of Bi 2 MoO 6 samples were hollow microsphere structure assembled by nanosheets . The particle size was slightly increased as enhancing W 6+ ions doping concentration to 5%, then decreased as the doping concentration increased. Besides, doping W 6+ ions can increase the band gap of products from 2.65 eV to 2.71eV. The upconversion emission intensity of all samples was strongly influenced by the W 6+ ions doping concentration. The luminescent intensity enhanced with the doping concentration increasing up to 3%, then decreased when the W 6+ ions concentration further increased. Moreover, the intensity of red emission increased by a large margin than that of green-light region. Besides, the lifetime of 4 F 9/2 states of Er 3+ ions for Bi 2 MoO 6 :20%Yb 3+ , 2%Er 3+ , 3%W 6+ (τ 655 = 583.64 μs) had significant longer lifetime relative to the Bi 2 MoO 6 :20%Yb 3+ , 2%Er 3+ (τ 655 = 70.29 μs).
研究领域:
材料科学
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光学材料
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纳米技术
·
发光学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Yaru Liu,Wenjing Yang,Yi Li,Shuang Wang,Sihui Zhan
Ciprofloxacin (CIP) has been widely detected in aquatic ecosystems due to antibiotics abuse and its refractory, which seriously affected public health and ecological safety. Herein, we devised a photo-electro-Fenton-like (PEF-like) system for efficient removal of CIP. CuBi 2 O 4 /Bi 2 MoO 6 (CBMO) p-n heterojunction composites were successfully fabricated through hydrothermal and solvothermal methods. Significantly, CBMO composite catalysts were not only able to generate ·OH by the Cu + activation of H 2 O 2 during electro-Fenton process, the following synergistic effects in the photo-Fenton process simultaneously promoted the production of more ·OH. The internal electric field (IEF) in the p-n heterojunction was conducive to the directional transfer of photogenerated electrons, thus promoting the spatial separation of photogenerated carriers. Moreover, photogenerated electrons could directly or indirectly activate H 2 O 2 to yield more abundant ·OH, thus improving photoelectric catalytic activity . Consequently, the degradation efficiency of CIP during PEF-like system was 97.4% in 90 min and the mineralization efficiency finally reached 78.5% in 180 min. The prepared CuBi 2 O 4 /Bi 2 MoO 6 ‐40 (CBMO-40) possessed great stability and structural integrity after six consecutive cycles. Furthermore, the CBMO-40 in PEF-like system showed superior performance for the removal of diverse antibiotics, including quinolones, tetracyclines and sulfonamides, which revealed the broad applicability of CBMO-40 for the antibiotics removal in PEF-like system.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Qingling Liu,Zi Yu,Dongmei Liang,Jie Xiong,Tao Gan,Huayu Hu,Zuqiang Huang,Yanjuan Zhang
Internal electric field (IEF) of heterojunction photocatalysts is considered as the potent driving force for efficient charge separation, however, the presence of high energy barrier and poor interfacial stability in nascent heterojunctions hinder interfacial charge separation and migration. In this study, an elemental imprinting-induced interfacial growth strategy was proposed to bridge g-C 3 N 4 (CN) and Bi 2 MoO 6 (BMO) for synthesizing BMO/Bi-CN Z-scheme heterojunction photocatalyst by creating an essentially connected porous network to enable easy transfer of the guest material to the binding sites. The established interfacial N–Bi–O bonds enhanced the stability of heterojunction and served as rapid channels for charge transfer, effectively promoting the migration rate and separation efficiency of photogenerated carriers. Particularly, the Ohmic contact between the interface significantly reduced the interfacial energy barrier. Experimental and theoretical analyses demonstrate that the interfacial chemical bonds and Ohmic contact reinforced the IEF and significantly enhanced the photocatalytic performance of BMO/Bi-CN, achieving complete degradation of ciprofloxacin with a kinetic rate constant of 0.0481 min −1 . This strategy plays a crucial role in establishing interfacial chemical bonds and optimizing heterogeneous structure of composite photocatalysts.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2025
·Vol. 26
·期 16
·7751
·
IF 4.9
Jian Feng,Xiaohui Li,Xia Ran,Li Wang,Bo Xiao,Rong Li,Guangwei Feng
Fenton oxidation technology utilizing hydrogen peroxide is recognized as an effective method for producing reactive oxygen species (ROS) to facilitate the degradation of antibiotics. However, the requirement for strongly acidic conditions during this process significantly restricts its broader applicability. In this study, we synthesized black phosphorus (BP) nanosheets by exposing the {010} crystal planes and then constructed a 0D/2D BP/Bi2MoO6(PBMO) heterojunction to function as a Fenton catalyst. The PBMO-75 heterojunction exhibited a remarkable increase in photo-Fenton catalytic activity towards oxytetracycline (OTC) under neutral conditions, achieving catalytic efficiencies that were 20 and 8 times greater than those of BP and Bi2MoO6(BMO), respectively. This can be attributed to its strong absorption of visible light, the establishment of an internal electric field (IEF) at the interface, and the implementation of a Z-scheme catalytic mechanism. Additionally, the photo-Fenton system was further improved in OTC degradation through the continuous conversion of Mo6+/Mo5+under visible light irradiation in conjunction with H2O2. Based on ERS, XPS, and active species trapping experiments, we propose a Z-scheme charge transfer mechanism for PBMO. This research offers compelling evidence that 0D/2D Z-scheme heterojunctions are promising candidates for the photo-Fenton treatment of antibiotic contaminants.
研究领域:
环境科学
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光催化
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材料科学
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水处理
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Wei Liu,Jiabin Zhou,Ying Zhou,Dan Liu
Non-steroidal anti-inflammatory drugs (NSAIDs) are a kind of emerging pollutants that have caused people's concerns. In this work, the catalytic system with perovskite-like material Bi 2 MoO 6 modified graphitic carbon nitride (g-C 3 N 4 ) combined with peroxymonosulfate (PMS) was constructed to efficiently degrade nimesulide (NIM) in water. After the characterization by various technologies, it was found that the g-C 3 N 4 @ Bi 2 MoO 6 composite possessed an increased specific surface area, enhanced light absorption range, and lower recombination rate of the photogenerated carriers. Thereby the composites displayed stronger photocatalytic activity than pure g-C 3 N 4 and Bi 2 MoO 6 . The introduction of PMS not only provided more reactive oxygen species (ROSs) for the photocatalytic system, such as SO 4 − and 1 O 2 but also further promoted the transfer of photogenerated electrons. The multiple active species that existed in the system were involved in the photocatalytic process so that 97.4% NIM was degraded with 12 min. The degradation path of NIM was analyzed by LC-MS detection, which revealed that the structure of NIM was decomposed by the cleavage of the phenyl ether bond. The detection results of the total organic carbon (TOC) indicated that the proposed method could enhance the mineralization efficiency of NIM. This work could propose a solution for the rapid removal and degradation of NSAIDs in water.
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Junhui Yi,Xiaojing Xiao,Zhanhong Chen,Zhenhong Ou,Shiting Liang,Ziying Huang,Zhenghui Liu,Dehao Li,Jiaming Zhang,Kaiwei Liu,Guijun Ma,Changlin Yu
Bismuth molybdate has attracted extensive attention as a visible semiconductor photocatalyst with great application potential, but bismuth molybdate is suffering rapid charge recombination and lower catalytic activity. Therefore, a rod-shaped Bi 2 MoO 6 /Bi 14 MoO 24 homoelemental heterojunction was successfully fabricated using hydrothermal treatment and high-temperature calcination combined method. This novel heterojunction shows an excellent photocatalytic activity and good stability. Degradation efficiency of the optimal catalysts is up to 86 % under visible light for 100 min, and remained above 80 % after four cycles. Kelvin probe force microscopy (KPFM) is adopted to further verify faster separation of photogenerated carriers on Bi 2 MoO 6 /Bi 14 MoO 24 heterogeneous nanorods. The result of DFT calculations also further proves that Bi 2 MoO 6 /Bi 14 MoO 24 homoelemental heterojunction has higher work function and lower Fermi level, which can prolonging photogenerated electrons and holes lifetimes. Free radical capture experiments suggest that super oxide anion (•O 2 - ) and hydroxyl (•OH) are main active groups during photocatalytic degradation, which is proved by EPR result. Considering this, a possible S-scheme mechanism is proposed to illustrate this enhanced performance. This research enriches heterojunction system and provides a reference for the design of efficient photocatalysts in future.
研究领域:
光催化
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材料科学
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环境科学
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纳米技术
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半导体物理
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2022
·Vol. 153
·期 6
·1743-1755
·
IF 2.936
Zhou Yi,Yao Tiantian,Tan Yawen,Chen Yongbo,Chen Zhiyue,Zhang Jin
In this study, a novel composite DUT-5/Bi 2 MoO 6 (DUT-5/BMO) photocatalytic material was prepared by two-step hydrothermal method for the first time. The materials were characterized by SEM, XPS, etc. Studies have shown that material with a new n–n heterojunction structure can quickly degrade tetracycline. DUT-5 was embedded between the Bi 2 MoO 6 nanosheets, which promotes the photogenerated electrons from DUT-5 flows to Bi 2 MoO 6 , thereby reducing the recombination rate of photo-generated electron–hole pairs. The BET results show that the composite material has a larger specific surface area than the monomer Bi 2 MoO 6 . It can provide more active sites. After 60 min of visible light irradiation, the photocatalytic degradation efficiency of TC with 15% DUT-5/BMO reached 84.22%, which is 5.37 and 2.12 times higher than that of pure DUT-5 and Bi 2 MoO 6 , ·O 2 − and h + were the main active substances in the photocatalysis process. In addition, DUT-5/BMO composites show excellent stability and recyclability in 5 times cyclic experiments. In conclusion, DUT-5/BMO has good stability in the environment, and can be used for environmental remediation without pollution. Graphical
研究领域:
环境科学
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材料科学
·
化学工程
·
纳米技术
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2021
·
IF 6.498
Mufan Sun,Zhongjing Chen,Yixuan Yin,Bingji Huang,Guangyu He,Haiqun Chen
A heterojunction of NiFe layered double hydroxide (NiFe LDH)-Bi 2 MoO 6 (BMO) loaded on reduced graphene oxide (RGO) sheets was synthesized via an eco-friendly solvothermal reaction. The structural characterization shows that NiFe LDH-BMO heterojunctions are well-distributed on the surface of silk-like transparent RGO sheets. The modification of BMO by NiFe LDH and RGO greatly enhances the photocatalytic performance of BMO for degradation of tetracycline (TC) under visible light. The photocatalyst prepared with 3 wt% RGO shows the highest activity and cycle stability. TC can be completely removed in 80 min, which is about 8.7 times that pure BMO, and showing excellent reusability even after five cycles. The excellent enhancement of photocatalytic performance of NiFe LDH-BMO/RGO composite is attributed to the unique sheet-on-sheet hierarchical heterostructure combined with RGO sheets, facilitating the visible light absorption and photogenerated charge carriers separation.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Ming Liu,Aikun Liu,Hongjian Zhang,Shuxuan Li,Yong Zhang
The coupling effect of piezo-photocatalytic technology is well demonstrated as a promising strategy for effective degradation of organic pollutants. However, the catalytic efficiency is dramatically limited by the undesirable neutralization of photogenerated electron-hole pairs. Herein, PVDF@Bi 2 MoO 6 /BiOBr heterojunction was designed elaborately to boosting their piezo-photocatalytic activity by built-in polarization field and controlled carrier transfer. The composite film presents excellent degradation performance of methyl orange (MO, 15 mg/L) (98.99%, 120 min) under the simultaneous ultrasonic vibration and visible light irradiation, which is around 2 and 3.1 times than that of individual piezoelectric and photocatalytic process. The improved piezo-photocatalytic capability could be attributed to the enhanced built-in piezoelectric field that generated by the vibration of p-type BiOBr nanosheets . The construction of piezoelectric polarization reduces the recombination efficiency of photogenerated carriers at the p-n heterojunction interface, thereby dramatically improving the catalytic efficiency. This work proposes and demonstrates the very positive role of dual piezoelectricity in modulating the photocatalytic efficiency in semiconductors, which provides a new paradigm for the further development of highly-efficient piezo-photocatalysts to be applied in environmental purification and wastewater treatment.
研究领域:
材料科学
·
环境科学
·
催化技术
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Hongjiao Song,Binbin Hu,Yulong Zhou,Ye Wu,Jibao Wu,Hongsong Tian,Qifeng Liang,Yongsheng Tan,Zebo Fang,Lirui Yu,Huili Li,Shunhang Wei
Interface engineering has been proven to be a promising strategy for regulating carrier transport. Herein, an interfacial Mo–O–W bond was constructed between Bi2MoO6 nanospheres and WO3 quantum dots. It served as a fast transfer channel for interfacial photogenerated carriers, resulting in the formation of a direct Z-scheme heterojunction. The Z-scheme heterojunction not only maximized the redox ability but also exhibited enhanced separation and transfer efficiency of photogenerated carriers. Thereby, it exhibited excellent degradation activity and reusability for different simulated pollutants (levofloxacin, rhodamine B, and methylene blue) under LED irradiation, and its photocatalytic rate is approximately doubled. Unexpectedly, a considerable amount of H2O2 was formed via a direct one-step two-electron oxygen reduction reaction process, which played a significant role in the photodegradation process, even surpassing the role of electrons/holes as active species. Furthermore, the photodegradation pathway of levofloxacin by the Z-scheme heterojunction was analyzed. This study could provide insights into establishing an interfacial chemical bond, modulating charge transfer, and the photodegradation mechanism.
研究领域:
材料科学
·
环境化学
·
光催化
·
纳米材料
·
界面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Wanju Zhang,Fangcheng Zhao,Jin Han,Jianyu Wu,Xin Nie,Zhanxiao Wang,Zhichao Dong,Lilan Huang
As a clean and environmental friendliness advanced oxidation technology, photocatalysis has attracted wide attention in recent years. An ideal photocatalyst should have the characteristics of narrow band gap, high stability and superior catalytic efficiency. Bismuth molybdate (Bi 2 MoO 6 ), with the narrow band gap (2.5–2.8 eV), has emerged as a research hotpot in the field of photocatalysis. Herein, a photocatalytic membrane was prepared by loading Bi 2 MoO 6 on polyetherimide (PEI) nanofiber membrane (PEI/Bi 2 MoO 6 ) by in-situ growth method and used for the degradation of dyes and antibiotics. Under the optimal reaction conditions, the obtained PEI/Bi 2 MoO 6 membrane showed the best photocatalytic performance with the degradation rate of 94.5 % for MO within 25 min under ultraviolet light. For other dyes such as Orange G (OG), Methylene Blue (MB), Janus Green B (JGB) and antibiotics such as Ciprofloxacin (CIP) and Levofloxacin (LEV), PEI/Bi 2 MoO 6 membranes also showed excellent catalytic performance, and the photocatalytic membrane exhibited good reusability. The detailed photocatalytic mechanism was inferred and formulated through abundant characterizations. More importantly, the combination of photocatalysis and membrane technology enabled PEI/Bi 2 MoO 6 membrane good photocatalytic performance under dynamic and continuous reaction, which provided promising potential for continuous photocatalytic degradation of pollutants in practical applications.
研究领域:
环境科学
·
材料科学
·
化学工程
·
纳米技术
·
催化
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Yu Liu,Xinhui Xia,Zhelu Gao,Qingliang Zhao,Jing Ding,Xiuwen Cheng,Liangliang Wei
The designation and fabrication of heterogeneous photocatalyst with superior redox capability is an important technique for emerging pollutants treatment. In this study, we designed the Z-scheme heterojunction of stable 3D-Bi 2 MoO 6 @MoO 3 /PU, which could not only accelerate the migration and separation in photogenerated carriers, but also stabilize the separation rate of photo-generation carriers. In the Bi 2 MoO 6 @MoO 3 /PU photocatalytic system, 88.89% of oxytetracycline (OTC, 10 mg L −1 ) and 78.25%–84.59% of multiple antibiotics (SDZ, NOR, AMX and CFX, 10 mg L −1 ) could be decomposed within 20 min under the optimized reaction condition, revealing the superior performance and potential application value. Specifically, the morphology, chemical structure and optical properties detection of Bi 2 MoO 6 @MoO 3 /PU greatly affected the direct Z-scheme electron transferring mode in the p-n type heterojunction. Besides, the ·OH, h + , ·O 2 − dominated the photoactivation process through ring-opening, dihydroxylation, deamination, decarbonization and demethylation in OTC decomposition. Expectantly, the stability and universality of Bi 2 MoO 6 @MoO 3 /PU composite photocatalyst would further broaden the practical application and demonstrated that the potential of photocatalytic technique in antibiotics pollutants for wastewater remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）