Nanomaterials
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2025
·Vol. 15
·期 5
·410
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IF 4.3
Yongxin Lu,Shangjie Gao,Teng Ma,Jie Zhang,Haixia Liu,Wei Zhou
The construction of heterojunctions can effectively inhibit the rapid recombination of photogenerated electrons and holes in photocatalysts and offers great potential for pollutant degradation. In this study, a Z-scheme heterojunction g-C3N4/WO3photocatalyst was synthesized using a combination of hydrothermal and calcination methods. The photocatalytic degradation performance was tested under visible light; the degradation efficiency of Rh B reached 97.9% within 15 min and that of TC-HCl reached 93.3% within 180 min. The excellent photocatalytic performance of g-C3N4/WO3composites can be attributed to the improved absorption of visible light, the increase in surface area, and the effective separation of photogenerated electron–hole pairs. In addition, after four cycles of experiments, the photocatalytic performance of g-C3N4/WO3did not decrease obviously, remaining at 97.8%, which proved that the g-C3N4/WO3heterojunction had high stability and reusability. The active radical capture experiment confirmed that h+and ·O2−played a leading role in the photocatalytic degradation. The Z-scheme heterojunction g-C3N4/WO3designed and synthesized in this study is expected to become an efficient photocatalyst suitable for environmental pollution control.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
Qinqin Yu,Youzhi Dai,Yulin Ling,Qian Wu,Zhu Zhang,Bo Feng
Single-atom catalysts have drawn tremendous attention on account of their high activity, selectivity and stability. Z-scheme heterojunctions can effectively improve the utilization of optical energy due to the enhanced separation of photogenerated electrons and holes. In this work, several catalysts associated with single-atom Fe (FeSA) loaded on Z-scheme heterojunction WO 3 /BiOBr were prepared; their structure, morphology and photoelectric properties were analyzed; their photocatalytic degradation performance of Ciprofloxacin (CIP) was investigated; and the effects of initial pH, initial CIP concentration, catalyst dosage, light intensity , inorganic anions and humic acid on CIP removal rate were examined. Relevant results showed that the percentage of CIP removal by FeSA/WO 3 /BiOBr could reach 98.5% (120 min); the optimal conditions were pH= 9, [CIP] 0 = 10 mg/L, [FeSA] 0 = 0.8 g/L and I light = 500 W (100% degradation rate within 30 min);·O 2 - and h + were the key active species. Results of the cyclic experiments suggested good stability of the catalyst. Furthermore, the mechanism of CIP photocatalytic degradation was proposed to be a synergistic mechanism of Z-scheme heterojunction migration and valence cycling between single-atom Fe 2+ and Fe 3+ . Finally, the products and pathways of CIP degradation were analyzed.
研究领域:
环境科学
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材料科学
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光催化技术
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
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IF 14.229
Sicong Wang,Zhenyuan Teng,Yanqi Xu,Meng Yuan,Yunhao Zhong,Sixiao Liu,Chengyin Wang,Guoxiu Wang,Teruhisa Ohno
In designing of carbon nitride-based Z-scheme systems, band structure engineering of graphitic carbon nitride (g-C 3 N 4 ) is unquestionably a crucial demand but paid rare attention to. Here, the broadened light absorption and charge transfer on sub gaps induced by thermal defects in defect-rich carbon nitride (d-C 3 N 4 ) are simultaneously utilized to engineer a novel and more efficient Z-scheme system. The as-prepared α-Fe 2 O 3 /d-C 3 N 4 -1 exhibits dramatically improved photocatalytic degradation rate for tetracycline compared withα-Fe 2 O 3 /g-C 3 N 4 -1 under visible light. Dye photosensitization effect on photocatalytic reaction was ruled out, and the tetracycline decomposition mechanism was proposed. The efficiently restrained charge recombination and broadened light absorption in this Z-scheme system are key parameters of the outstanding photocatalytic activity. This proposed mechanism has the potential to push the limit of traditional carbon-nitride-based Z-scheme photocatalysts and can also shed substantial light on the engineering strategies for other polymeric Z-scheme photocatalysts.
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
DOI
高影响因子
CATALYSIS LETTERS
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2025
·Vol. 155
·期 5
·1-19
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IF 2.4
Hu Xinyin,Xiao Guoqing,Chen Chunlin,Chen Chunyan,Zeng Xiang,Li Ruili,Yang Zhengwei
Recently, several emerging pollutants have caused increasing damage to aquatic ecosystems. Reducing antibiotic concentrations in water by visible light is one of the most promising strategies for sustainable development. Here, a Bi 2 S 3 /CeO 2 /Ni(OH) 2 Z-scheme heterojunction photocatalyst was prepared by the hydrothermal method, which could effectively utilize free radicals to degrade tetracycline. Ni(OH) 2 was used for co-catalysing in photodegradation experiments to improve electron transfer and enhance photocatalytic performance. The degradation rate of the Z-scheme heterojunction photocatalyst for 20 mg/L TC was 91.35% after reacting 60 min under visible light irradiation. Besides, it also investigated such operational parameters influencing the photocatalytic reaction as catalyst dosage, initial concentration of tetracycline hydrochloride (TC), and solution pH. Studies using free radical scavenging experiments and electron spin resonance (ESR) measurements demonstrated that hydroxyl radicals (·OH) and superoxide radicals (·O 2 − ) both contributed to the photodegradation of TC. Finally, with high-performance liquid chromatography-mass spectrometry (LC-MS), potential degradation pathways of the intermediate products were logically inferred as well as the photocatalytic mechanism. The experimental results surface that the prepared Z-scheme heterojunction photocatalyst Bi 2 S 3 /CeO 2 /Ni(OH) 2 exhibits superior photocatalytic performance, offering a novel approach to addressing TC contamination in environmental settings. Graphical
研究领域:
环境科学
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材料科学
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光催化技术
✓ 已验证
产品关联
DOI
高影响因子
Water
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2025
·Vol. 17
·期 11
·1594
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IF 3
Xiaoze Yin,Yuxin Xiao,Chaoyue Wu,Jinnan Wang
Although Ag3PO4possessed high quantum yield (approximately 90%) and strong oxidation potential, its practical application was limited due to serious photocorrosion and inadequate stability. To improve the anti-photocorrsion ability, carbon nitride quantum dots (CNQDs) were loaded on octopod-like Ag3PO4with {110}-faceted rhombic dodecahedrons. The CNQDs stabilized the high-energy {110} facets via carboxylate-mediated interactions, facilitating oriented assembly into 3D octopod configurations. More importantly, a Z-scheme heterojunction was constructed between CNQDs and Ag3PO4for electrons transfer from Ag3PO4to CNQDs, which could not only maintain strong redox potentials but also suppress carrier recombination. The 12.5%CNQDs/Ag3PO4composite achieved a more than 90% removal of methyl orange within 13 min. Radical trapping and EPR analyses indicated that holes of Ag3PO4played a dominant role in organics degradation. In addition, •O2−, which was generated from the O2reduction by photogenerated electrons of CNQDs, also participated in the degradation of organics. This work provides a facet-controlled heterojunction design strategy, leveraging quantum-confined CNQDs to enhance charge kinetics and molecular oxygen activation.
研究领域:
材料科学
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环境化学
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纳米技术
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光催化
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表面科学
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DOI
高影响因子
Catalysts
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2025
·Vol. 15
·期 1
·69
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IF 4
Yuning Liang,Baohui Wang,Tao Cheng,Mingchun Bi,Weimeng Chi,Yuxi Liu,Wenjing Zhang,Yuxuan Liu
A novel dual Z-scheme heterojunction photocatalyst was constructed by introducing the narrow-bandgap semiconductor CuInS2(CIS) into the dual metal-organic framework (MOF) system of UiO-66(Zr) and NH2-MIL-101(Fe). This structure effectively overcomes the limitations of conventional photocatalysts in terms of light absorption range and the separation efficiency of photogenerated charge carriers. The prepared ternary catalyst, (UiO-66(Zr))-(NH2-MIL-101(Fe))/CuInS2, exhibited excellent photocatalytic performance under visible light irradiation, achieving a hydrogen production rate of 888 μmol g−1h−1and a methylene blue (MB) degradation efficiency of up to 95.03%. The significant enhancement in performance is attributed to the material’s porous structure, extended light absorption range, and optimized electron transfer pathways. Additionally, the construction of the dual Z-scheme heterojunction further promotes the separation and migration of photogenerated charge carriers, suppressing electron–hole recombination. This study demonstrates the great potential of dual Z-scheme heterojunctions in improving photocatalytic efficiency and provides an important theoretical foundation and design strategy for the development of efficient photocatalysts.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Yunqi Ning,Shan Wang,Hanbing Wang,Wei Quan,Daqi Lv,Shansheng Yu,Xiaoying Hu,Hongwei Tian
The development of low-cost and efficient metal sulfide photocatalysts through morphological and structural design is vital to the advancement of the hydrogen economy. However, metal sulfide semiconductor photocatalysts still suffer from low carrier separation and poor solar-to-hydrogen conversion efficiencies. Herein, two-dimensional ZnIn 2 S 4 nanosheets were grown on Zn 0.5 Cd 0.5 S hollow nanocages to construct Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 hollow nanocages for the first time. Novel hollow core–shell Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 /MoS 2 nanocages with Z-scheme heterojunction structures were obtained by incorporating MoS 2 nanosheet co-catalyst via the solvothermal method. The resulting Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 /MoS 2 exhibited unique structural and compositional advantages, leading to remarkable photocatalytic hydrogen evolution rates of up to 8.5 mmol·h −1 ·g −1 without the use of any precious metal co-catalysts. This rate was 10.6-fold and 7.1-fold higher compared to pure ZnIn 2 S 4 and Zn 0.5 Cd 0.5 S, respectively. Moreover, the optimized Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 /MoS 2 photocatalyst outperformed numerous reported ZnIn 2 S 4 -based photocatalysts and some ZnIn 2 S 4 -based photocatalysts based on precious metal co-catalysts. The exceptional photocatalytic performance of Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 /MoS 2 can be attributed to the Z-scheme heterojunction of core–shell structure that enhanced charge carrier separation and transport, as well as the co-catalytic action of MoS 2 . Overall, the proposed Zn 0.5 Cd 0.5 S@ZnIn 2 S 4 /MoS 2 with heterojunction structure is a promising candidate for the preparation of efficient photocatalysts for solar-to-hydrogen energy conversion.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2019
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IF 5.155
Zhaoyang Li,Yongjie Zhao,Qing Guan,Qian Liu,Sara Khan,Leilei Zhang,Xianze Wang,Lei Chen,Xia Yang,Mingxin Huo
Photocatalytic reduction of nitrate has attracted much attention recently, however, low efficiency and difficult separation have limited its application in practice. In this study, the novel direct dual Z-scheme AgBr(Ag)/MIL-101(Cr)/CuFe 2 O 4 (AB/M/CFO) was fabricated by the hydrothermal technology combined with the photodeposition method for the first time. The AB/M/CFO exhibited the highest nitrate conversion and nitrogen selectivity (79.9% and 94.5%, respectively) compared to AgBr(Ag)/MIL-101(Cr), MIL-101(Cr) and CuFe 2 O 4 for 30 min UV-light irradiation. The dual Z-scheme of AB/M/CFO enhanced electron transfer and charge separation, which was proved by transient photocurrent responses, leading to a significant improvement in photocatalytic efficiency. Meanwhile, after four cycles, the AB/M/CFO photocatalyst also displayed a strong magnetic separation ability and excellent recycling stability. Furthermore, the excitation and electron transfer process over dual Z-scheme AB/M/CFO photocatalytic material were proposed, based on the radical trapping experiments. Our work provides a new strategy to construct dual Z-scheme MOFs-based materials that have promising applications in photocatalytic reduction of pollutants.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
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IF 6.735
Qin Li,Yang Xia,Chao Yang,Kangle Lv,Ming Lei,Mei Li
Facing the requirement of modern industrial development, selective reduction of 4-nitroaniline (4-NA) into p-phenylenediamine (PPD) via a facile, economic and eco-friendly photocatalysis technique has attracted more and more attention in recent years. In this study, ZnIn 2 S 4 (ZIS) nanosheets grew in-situ on the surface of TiO 2 hollowspheres through a hydrothermal method and formed a direct Z-scheme heterojunction composite, which exhibited exceedingly better photocatalytic 4-NA reduction performance than bare ZIS and TiO 2 . Such enhancement was mainly attributed to the dissimilar dimensionalities, intimate contact, and matchable band edge positions between ZIS and TiO 2 semiconductors. Moreover, the substantial mechanism for the photocatalytic reaction in the ZIS/TiO 2 system was reasonably proposed. Inspired by recent applications of the Z-scheme heterostructured materials in solar energy conversion and artificial photosynthesis, this work would arouse an increasing interest in designing more Z-scheme photocatalyst systems with high efficiency and extensive applications.
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
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Can Zhao,Nan Li,Shirui Zhang,Xinding Lv,ALabdulsalam Mohammed Nasser,Yue Li,Shuqian Sun,Jiangquan Ma
Water splitting to produce H 2 and oxygen reduction to synthesize H 2 O 2 have become an effective strategy to meet energy needs due to their sustainability. However, simultaneous production of H 2 O 2 and H 2 in a catalytic system is still challenging. Herein, we constructed a novel MoSe 2 /Bi 0.5 Na 0.5 TiO 3 (MS/BNT) Z-type heterojunction as a piezo-photocatalyst for hydrogen and hydrogen peroxide production. Under the condition of piezoelectric photocatalysis, the optimized 5% MS/BNT catalyst achieved significant double high activity: the hydrogen evolution (HER) rate was as high as 3365.94 μmol/g/h, and the H 2 O 2 yield was 2784.5 μmol/g/h, which was 28 times and 14.7 times that of pure BNT, respectively. This excellent bifunctional catalytic performance is due to the synergistic effect of Z-scheme heterojunction and piezoelectric field, which effectively promotes the spatial separation of electron-hole pairs, thus greatly improving the simultaneous generation efficiency of H 2 and H 2 O 2 . This study provides a key new idea for the design of piezoelectric photocatalysts that can efficiently and synergistically produce a variety of high-value products (such as H 2 and H 2 O 2 ).
研究领域:
能量转换
·
催化
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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
JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Kangfu Wang,Meiru Lv,Tian Zhou,Zehuan Zhang,Xingkun Liang,Huaying Liu,Huan Li,Xiaoning Tang
Bacterial infections pose a severe threat to human health and the living environment. Photodynamic antimicrobial strategies have attracted attention since they are not affected by the development of drug resistance by the organisms. Cuprous oxide (Cu 2 O) is a promising material for application in the photocatalytic antimicrobial field due to its excellent photo responsiveness. However, the fast recombination of photogenerated carriers and poor stability limit the application of Cu 2 O. This paper uses the advantages of the exceptional strength of copper oxide (CuO) and the photocatalytic potential of tungsten trioxide (WO 3 ) to design a photocatalytic antimicrobial WO 3 /Cu x O composite agent. The structure of the composite material reveals that CuO particles and WO 3 nanosheets are grown in-situ on octahedral Cu 2 O crystals, with the outermost layer primarily consisting of WO 3 . Simultaneously, the ternary composite structure utilizes interfacial interactions to regulate the electronic structure, which acts as the conduit for electron transfer. The killing effect of WO 3 /Cu x O on Escherichia coli ( E. coli ) after visible-light irradiation reaches 100.00%, which is 2.57 times higher than that of Cu 2 O and 34 times higher than that of WO 3 . The outstanding antimicrobial ability is attributed to the constructed stepped double Z-type heterojunction structure, which realizes multi-channel transfer of carriers and retains the carriers with superior redox capacity, increasing the quantum yield of reactive oxygen species (ROS). The ROS generated by photoexcitation of WO 3 /Cu x O is the main reason for the superior antibacterial performance. The detection results indicate that ROS oxidizes the bacterial physiological structure, resulting in noticeable depressions, wrinkles, and ruptures in Escherichia coli. Meanwhile, during the mixing and collision process between bacteria and the material, metal ions can denature protein structures, and the bacterial cell surface can be punctured or even torn. These factors collectively affect bacterial activity. This work provides effective ways and methods for designing efficient antimicrobial agents.
研究领域:
材料科学
·
微生物学
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光催化技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Kai Zhao,Yalan Feng,Zisheng Zhang,Hong Li,Xin Gao,Shuanglong Lin
Enhancing spatial charge separation is an efficient strategy for the improvement of photocatalytic performance. Herein, an ammonia synthesis approach was proposed with an in-situ grown ternary GO/MoS 2 /Ag 3 PO 4 Z-scheme heterostructure photocatalytic system to promote spatial charge separation at surface & interface. Owing to the decent electrical and thermal conductivity properties of GO, ternary photocatalyst delivered evidently enlarged surface area, promoted spatial charges separation and significantly enhanced N 2 photo-fixation efficiency under irradiation of visible light. Through the synergistic effect of electron transportation on GO and the efficient separation of electron-hole pairs on heterojunction, the transportation and separation of photo-generated charges can be realized on both surface and interface, leading to better harvest and utilization of light illumination. The possible Z-scheme heterostructure mechanism for N 2 photo-fixation reaction was explored, which not only offers a new approach for design of heterostructure photocatalysis system but also provides a novel strategy for enhanced spatial charges separation.
研究领域:
材料科学
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环境科学
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光催化
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）