JOURNAL OF RARE EARTHS
·
2026
·
IF 9.6
Yadong Liu,Yongjin Li,Jinge Hao,Taizhong Xiao,Liang Xu,Pengqi Shao,Zhaoyi Yin,Jianbei Qiu,Zhengwen Yang,Zhiguo Song
Graphitic carbon nitride (g-C 3 N 4 ) holds great promise for photocatalytic CO 2 reduction, but its performance is critically limited by strong excitonic effects that hinder charge separation and migration. Herein, a highly dispersed Ce-doped tubular g-C 3 N 4 framework was designed to induce a tailored amorphous phase transition, fundamentally modifying its electronic and structural properties. The amorphization creates a static exciton self-trapping network that reduces the exciton binding energy from 65 to 54.3 meV and generates a robust localized built-in electric field, driving spatial separation and directional charge migration along the one-dimensional tubular channels. Meanwhile, Ce 3+ /Ce 4+ redox couples act as a dynamic electron buffer, kinetically capturing and shuttling electrons. Consequently, the optimized 3%Ce-TCN achieves a CO production rate of 87.31 μmol/(g·h) under visible light, a 2.5-fold enhancement over pristine TCN, with an apparent quantum efficiency of 0.799% at 420 nm. In-situ Fourier transform infrared (FTIR) and density functional theory (DFT) calculations confirm that the Ce sites lower the energy barrier for key *COOH intermediate formation. This work establishes a new paradigm for manipulating exciton dynamics and carrier migration through rare earth-doping-induced microstructural engineering.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 45
·31820-31834
·
IF 3.9
Peiyao Xiong,Qian Li,Qijun Tang,Haiqiang Wang,Zhongbiao Wu
In this study, alkali-metal-doped crystalline g-C3N4 with an enriched cyano group was synthesized using the molten salt method and used for the visible-light photocatalytic degradation of methylamine (MA), a common organic amine compound with a low odor threshold. Different types and proportions of melting salts (Li, K, and Na) were added during secondary calcination to regulate the morphology, crystallinity, and surface defects of graphitic carbon nitride (g-C3N4). With molten salt treatment matched the melting point of the binary salt system, a cyano group and alkali metal co-doped crystalline g-C3N4 with a high surface area and good crystallinity were prepared. Co-decorating the alkali metal and cyano groups on crystalline g-C3N4 facilitated the adsorption of MA, realized an excellent photo-charge transfer efficiency, and generated more superoxide radicals. Compared with pristine g-C3N4 (PCN), the apparent rate constant of LiK15 : 5-CCN for the degradation of MA increased by 10.2 times and the degradation efficiency of 1000 ppm MA gas was 93.1% after 90 min of irradiation with visible light, whereas the degradation efficiency of PCN was 19.2%.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jiayou Liu,Xiaoxiang Huang,Lizhen Hu,Penglei Liu,Liuhu Jia,Keiko Sasaki,Zhongchao Tan,Hesheng Yu
Simultaneous avoidance of secondary air pollution and catalyst deactivation remains a challenge for existing photocatalytic removal of nitric oxide (NO). Herein, a photocatalysis-adsorption (P-A) heterojunction is synthesized for eco-friendly NO removal by facilely grinding Pd single atoms (Pd 1 ) anchored g-C 3 N 4 (48CN/Pd) with UiO-66-NH 2 (UION). Under visible-light irradiation, the 40UION-CN/Pd composite shows 93.91 % of NO removal efficiency with only 2.73 % of NO 2 emissions and negligible catalyst deactivation. The DeNO x index increases remarkably from −0.66 for 48CN/Pd to 0.86 for 40UION-CN/Pd. Furthermore, the synthesized P-A heterojunction efficiently removes NO from real flue gases produced by a domestic coal-fired stove and from SO 2 -rich flue gases. The mechanism exploration based on experimental investigations and density functional theory (DFT) calculations reveals that UION captures the NO 2 selectively produced by 48CN/Pd, simultaneously suppressing NO 2 emissions and refreshing active sites for NO photooxidation. Moreover, the results of X-ray photoelectron spectroscopy (XPS), charge density difference calculation, energy-resolved distribution of electron traps (ERDT) and in-situ Kelvin probe force microscopy (KPFM) reveal that the built-in electric field and Type-II heterojunction formed between 48CN/Pd and UION promote the separation of photogenerated carriers, enhancing the catalytic activity of the composite. This work provides an innovative strategy to avoid NO 2 emission and catalyst deactivation during photocatalytic NO removal.
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
Hadeel A. Khayoon,Mohammed Ismael,Abbas Al-nayili,Hassan A. Alshamsi
LaFeO 3 -nitrogen deficient g-C 3 N 4 (LaFeO 3 -g-C 3 N 4 -H) heterostructure has been fabricated obtaining thermal polymerization of acetic acid-treated melamine followed by incorporation of perovskite-type LaFeO 3 onto the graphitic carbon nitride nanosheets (g-C 3 N 4 ) using La(NO 3 ) 3 ·6H 2 O and Fe(NO 3 ) 3 ·9H 2 O as precursors. The as-synthesized nanocomposite was investigated using Fourier Transform Infrared Spectroscopy (FT-IR), powder X-ray diffraction (XRD), UV–Vis Diffuse Reflection Spectroscopy (UV–Vis DRS), Scanning Electron microscope (SEM), and Transmission Electron microscope (TEM). The findings of the characterization study revealed the successful incorporation of LaFeO 3 on g-C 3 N 4 -H nanosheets. The band gap energy of LaFeO 3 -g-C 3 N 4 -H heterojunctions was found to be active in the visible light region. The LaFeO 3 -g-C 3 N 4 -H ability to degrade Rhodamine B (RhB) dye in an aqueous solution was investigated under sunlight illumination. The results of photocatalytic degradation activity showed that LaFeO 3 -g-C 3 N 4 -H photocatalyst has presented the highest photocatalytic efficiency of 99.5% after 60 min under sunlight irradiation. The remarkable photocatalytic activity can be attributed to the defect structure of g-C 3 N 4 and the construction of heterojunction. In addition, LaFeO 3 -g-C 3 N 4 -H showed promise recyclability after 5 cycles with slight activity reduction.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Rongxin Cao,Hui Yuan,Ning Yang,Qihong Lu,Yuxiong Xue,Xianghua Zeng
Two-dimensional sulfide is considered as one of the best alternative for noble metal cocatalyst, whereas few-layered 1T WS 2 structure is very helpful to promote the photocatalytical activity for hydrogen generation. Herein, few-layered 1T-WS 2 /g-C 3 N 4 composites have been prepared via a facile one-step calcination route and used as a noble metal-free catalyst for H 2 evolution. The results showed that the optimized 1T-WS 2 /g-C 3 N 4 has a H 2 evolution rate of 10.08 mmol∙g −1 h −1 , which is 180 and 2.44 times larger than that of pure pristine g-C 3 N 4 and g-C 3 N 4 (Pt), respectively. The enhanced photocatalytic activity can be explained as the optimized 1T-WS 2 /g-C 3 N 4 sample has an increased light absorption (from visible to infrared region), better electrical conductivity and high density of active sites. The studies will be helpful for constructing high efficient heterostructured catalysts by loading 1T phase metal dichalcogenides 2D of material onto a two-dimensional material surface.
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE SCIENCES
·
2023
·
IF 3.5
Qiqi Huang,Fuxiao Zhu,Feiyan Xiao,Gongliang Zhang,Hongman Hou,Jingran Bi,Shuang Yan,Hongshun Hao
In recent years, using external mechanical energy to solve environmental pollution problems has gradually become a promising strategy, such as piezoelectric catalysis and piezoelectric photocatalysis . In this paper, a series of HKUST-1/g-C 3 N 4 composite materials were successfully synthesized by the combination of g-C 3 N 4 with S-vacancy and porous HKUST-1 semiconductor. Under visible light irradiation and ultrasonic action, the catalytic activity of HKUST-1/g-C 3 N 4 on RhB degradation was investigated. When the mass ratio of HKUST-1 to g-C 3 N 4 is 1:0.3 during the process of piezoelectric photocatalysis, the as-prepared HKUST-1/g-C 3 N 4 composite had the best RhB degradation performance up to 94.42%, which is about 2.83 times that of visible light and 3.56 times that of ultrasonic waves. According to the result of the trapping experiment, the process of piezo-photocatalytic reaction could produce the number of reactive oxygen species (ROS), and the hydroxyl radical (•OH) was crucial in the breakdown of pollutants.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 40
·18659-18670
·
IF 3.3
Zhentao Wang,Waheed Iqbal,Jingjing Wang,Ninghui Chang,Chuanguang Qin
Degrading dye waste using inexpensive synthetic photocatalysts is intriguing since it provides the dual advantage of treating water and managing waste simultaneously. There is considerable interest in the construction of heterojunctions for their efficiency in using solar energy for the degradation of wastewater contaminants and enhancing the solar conversion efficiency. Herein, BiVO4 microspheres and 2D g-C3N4 nanosheets were used to synthesize a direct Z-scheme BiVO4/g-C3N4 heterojunction through a hydrothermal calcination approach. The distinct 0D/2D intimate contact heterostructure displayed a high interfacial area and broader visible-light absorption range together with high photoexcited charge pair mobility. Optimizing the content of the BiVO4 microspheres in the heterostructure led to the maximum efficiency for the visible-light photodegradation of rhodamine B (RhB), which was about 12.5 and 2.4 times higher than that for pure BiVO4 and g-C3N4, respectively. Moreover, the quenching effects of various scavengers demonstrated that ˙O2− and ˙OH radicals were the principal active species responsible for ameliorating the photocatalytic performance for RhB degradation. The demonstrated strategy for boosting the photocatalytic performance with Z-scheme systems may help the advancement of high-performance photocatalysts for sustainable and efficient pollutant degradation and energy applications.
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS COMMUNICATIONS
·
2023
·
IF 3.7
Zhenbang Xie,Qihang Liu,Haixin Zhao,Hongtai Chen,Guozhi Jia,E. Lei,Chao Wang,Yongzhu Zhou
The low charge separation and transfer of g-C 3 N 4 hinders its industrial application in photocatalytic hydrogen evolution. Here, we design a novel co-catalyst strategy to integrate Ag 2 Se nanoparticles in situ on the surface of g-C 3 N 4 . The optimized photocatalyst, 15% Ag 2 Se/g-C 3 N 4 , demonstrates remarkable photocatalytic efficiency in the hydrogen evolution rate, reaching to 1102.8 μmol·g −1 ·h −1 , 7 times higher than g-C 3 N 4 . To further elucidate the photocatalytic activity of 15% Ag 2 Se/g-C 3 N 4 , we present a possible mechanism based on various characterizations and density functional theory calculations. This research offers potential insights for the future development of silver chalcogenide composites in photocatalysis.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Yiwei Shan,Ying Guo,Yu Wang,Xiran Du,Jun Yu,Hao Luo,Hui Wu,Bruno Boury,He Xiao,Liulian Huang,Lihui Chen
Using oxygen reduction for the photocatalytic production of hydrogen peroxide (H 2 O 2 ) has been considered a green and sustainable route. In the present study, to achieve high efficiency, graphitic carbon nitride (g-C 3 N 4 ) was obtained using thermal polymerization from a bi-component precursor and was then assembled with cellulose nanofibers . It was found that a small quantity of cellulose nanofibers that generates carbon fibers upon pyrolysis greatly improves the photocatalytic activity compared with that of g-C 3 N 4 alone. The well-defined carbon/g-C 3 N 4 heterojunction-type material exhibits as high as 1.10 mmol L -1 h −1 of photo-production of H 2 O 2 under visible light , which is 4.2 times higher than that yielded by pristine g-C 3 N 4 from a single precursor. A comprehensive characterization of the photocatalyst enables us to delineate the effect of the carbon nanofiber with respect to porosity, electron–hole separation, band gap regulation, and especially the electron transfer pathway. Our results demonstrate that nanocellulose-derived carbon, when precisely assembled with other functional material such as a photocatalyst, is a promising promoter of their activity.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Environmental Science-Nano
·
2021
·Vol. 8
·期 3
·773-783
·
IF 8.131
Haixia Wang,Dong Liang,Yan Xu,Xiang Liang,Xiaoqing Qiu,Zhang Lin
The development of an effective and stable photochemical sensor is urgently needed to solve the growing environmental pollution problem caused by immoderate usage of the organic phosphorus pesticide, chlorpyrifos. Under the circumstances, 2D/2D Z-scheme β-Bi2O3/g-C3N4 heterojunctions have been attempted to fabricate a photoelectrochemical sensor, which can detect chlorpyrifos selectively and sensitively. The 2D/2D intimate contact interfaces could facilitate the separation and migration of electron–hole pairs. Consequently, β-Bi2O3/g-C3N4 composites possess higher photocurrent response than single β-Bi2O3 and g-C3N4. After incubation with chlorpyrifos, in situ formed Bi–chlorpyrifos complex blocks the transformation of photogenerated charges, and thus contributes to a dramatic decline in photocurrent signal intensity and selective determination of chlorpyrifos. The novel photoelectrochemical sensor with strong stability presents a perfect linear relationship between photocurrent intensity and logarithm of chlorpyrifos concentration ranging from 0.01 to 80 ng mL−1, and displays excellent properties over a wide linear range with an ideal detection limit of 0.03 ng mL−1 (S/N = 3). To some extent, the Z-scheme β-Bi2O3/g-C3N4 sensor is promising for the detection of chlorpyrifos pesticides in practical environmental pollution treatment applications.
✓ 已验证
产品关联
DOI
高影响因子
STARCH-STARKE
·
2021
·
IF 2.741
Wenxi Zhu,Xiuhua Zheng,Jingjing Shi,Yifan Wang
Colloidal gas aphron (CGA) drilling fluid is an environmentally friendly near-balanced drilling technology that has been successfully applied to depleted oil/gas reservoirs. To overcome the limitations of its application in high-temperature drilling, acrylamide (AM), 2-acrylamido-2-methyl-1-propane sulfonic acid (AMPS), and N -vinylpyrrolidone (NVP) are grafted onto starch via inverse emulsion polymerization, and a foam stabilizer ESt-g-NAA with a temperature resistance of ≥150 °C is synthesized. The Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance ( 1 H-NMR) analysis suggest that all monomers are grafted onto starch efficiently. ESt-g-NAA has good solubility and thermal stability, as well as an excellent ability to stabilize foams at high temperatures. Based on microscopic observation, stable aphrons are generated successfully in the CGA drilling fluid prepared by ESt-g-NAA and surfactant after 150 °C aged. Results show that ESt-g-NAA based CGA drilling fluid aged at appointed temperatures (120–180 °C) is a high-performance drilling fluid with shear-thinning behavior, extremely high values of low shear rate viscosity (LSRV), and well-building capabilities.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Qinxue Xiong,Yi Chen,Tiefeng Xu,Zhexin Zhu,Wenxing Chen,Wangyang Lu
In this work, a flexible photocatalytic material (TiO 2 @g-C 3 N 4 -cotton) was obtained using modified graphitic carbon nitride (g-C 3 N 4 -CONH-KH550) for the a connection between the natural cotton supports and titanium dioxide (TiO 2 ) successively. Under the visible light, a valid photocatalytic activity was observed in the degradation of sulfaquinoxaline (SQX) and thiamethoxam. According to the support stability tests and the UV accelerated aging tests, g-C 3 N 4 -CONH-KH550 could shelter the supports with TiO 2 from the oxidation attack by hydroxyl radicals (•OH) generated. The investigation of antibacterial activity showed efficient inactivation of both Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ). Therefore, TiO 2 @g-C 3 N 4 -cotton showed stronger mechanical performance and much longer lifetime compared with TiO 2 @cotton. The degradation products and processes of substrates were investigated. This paper provides a new idea about the construction of an efficient and stable supported photocatalytic material.
✓ 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）