3DOM Structure Research Articles

Simultaneous treatment of trace pollutant and compound pollution using an effective n-ZnO@p-LaFeO3/3DOM SiO2 photocatalyst

To confront the complex challenges of removing trace and compound pollutants from wastewater, this research presents a novel photocatalyst, n-ZnO@p-LaFeO3/3DOM SiO2. Powered by visible light, this catalyst combines lanthanum ferrite and zinc oxide within a three-dimensional ordered macroporous silica framework. The 3DOM structure’s high surface area and porosity effectively concentrate pollutants, enhancing their interactions with reactive oxygen species (ROS) and notably reducing the ROS diffusion path. Impressively, it achieves over 96.5 % removal rates for both bisphenol A (BPA) and hexavalent chromium (Cr(VI)) at concentrations as low as 0.2 mg·L−1 within an hour. This study also discovers a synergistic effect in simultaneously oxidizing BPA and reducing Cr(VI). Moreover, it investigates the underlying mechanism, focusing on ROS generation and the crucial role of adsorption in the photocatalytic process. This study positions the presented photocatalyst as a promising solution to the intricate challenges of advanced oxidation processes (AOPs), showcasing an efficient strategy for comprehensive wastewater treatment.

Boosting gas-phase radical reactions for efficient oxidative dehydrogenation of propane over boron-based macropore catalyst

Efficiently boosting gas-phase radical reactions in the oxidative dehydrogenation of propane (ODHP) over boron-based catalysts requires the initiation, release, and propagation of radicals to work in a concerted manner within the catalytic system. To address this challenge, we developed a three-dimensional ordered macropore (3DOM) Al2O3 supported B2O3 catalyst. This unique design allows for the initiation, release, and propagation of radical reactions to take place within the macropore. By effectively balancing these processes, the designed catalyst demonstrated improved efficiency. The propane conversion over the B2O3/3DOM-Al2O3 catalyst with a pore size of 0.8 μm increased from 10 % to 25 % compared to that over the catalyst without the macropore. We attribute this enhancement to the ability of the 3DOM structure to facilitate the quick release of radicals from the B2O3 on the macropore surface into the same or nearby macropore within the 3DOM support. This efficient release of radicals minimizes the quenching losses that typically occur during the release process and ensures their efficient utilization in subsequent gas-phase radical reactions. This discovery offers a promising way for the development and optimization of boron-based catalysts for ODH of alkane.

High-efficiency solar-driven H2 generation by three-dimensionally ordered macroporous heterojunction structure

Development of high-efficiency photocatalyst for solar-driven hydrogen (H2) generation still encounters significant challenges. The biomimetic materials with a multistage structure are advantageous for enhancing light harvesting and utilization, as well as facilitating the efficient separation of photon-generated electron-hole pairs, thus play a crucial role in improving photocatalytic efficiency. Herein, the present study demonstrates the design of ZnIn2S4-TiO2 (ZIS/T) biomimetic multistage heterostructure with three-dimensionally ordered macroporous (3DOM) structure for efficient H2 generation. The optimal ZIS/T heterostructure photocatalyst by carefully regulating the interface structure exhibits the superior H2 generation rate of 9.05 mmol·h−1·g−1, surpassing the rates observed in 3DOM TiO2 and ZnIn2S4 samples by 11 and 4.1 times, respectively. The significantly improved photocatalytic efficiency was primarily attributed to the unique multistage structure that provide with abundant reactive sites and excellent mass transfer ability. Furthermore, the slow photon effect induced by the particular 3DOM multistage heterojunctions promote separation of photon-generated carriers. This resultant work provides a novel strategy for the construction of photo-confined heterojunction photocatalysts with enhanced photocatalytic performance through interfacial engineering.

Study on the microstructure and adsorption mechanism of different silver-based iodine adsorbents

To further clarify the iodine adsorption mechanism of three-dimensional ordered macroporous silver-silica (3DOM-SA) composite aerogel, based on the establishment of the relationship between pore structure and adsorption properties, the kinetic analysis of the adsorption process of gaseous iodine was carried out, and a comprehensive comparison was made with silver nitrate impregnated silica (AgS) which has been applied in engineering. The results show that the adsorption of gaseous iodine by 3DOM-SA and AgS fits well with the pseudo-second-order and pseudo-first-order kinetic model, corresponding to the main roles played by chemical adsorption and physical adsorption. The iodine adsorption capacity of 3DOM-SA (925 ± 46 mg/g) is much larger than that of AgS (64 ± 11 mg/g) due to the 3DOM structure and more dispersed nano-active components.

Self-assembled La0.7Sr0.3Fe0.9Ni0.1O3-δ-Ce0.8Sm0.2O2-δ composite cathode with a three-dimensional ordered macroporous structure for protonic ceramic fuel cells

Self-assembled La0.7Sr0.3Fe0.9Ni0.1O3-δ-Ce0.8Sm0.2O1.9-δ (LSFN-SDC) composite cathode with a three-dimensionally ordered macroporous (3DOM) structure is synthesized using poly(methyl methacrylate) as the template for protonic ceramic fuel cells. The LSFN and SDC phases both distribute uniformly in the cathode. The SDC phase reduces the thickness of the walls of the 3DOM structure and thus hinders the bulk conduction of electrons. SDC also decreases the specific surface area and the surface oxygen reactivity of the cathode, leading to the suppression of the adsorption and dissociation of O2. However, the SDC phase provides the conduction pathway for oxygen ions and enlarges three phase boundary consequently, which facilitates the charge transfer steps. The thickness of the walls and the specific surface area of the composite cathode are both increased with the rise of the concentration of the nitrate precursor solution, resulting in the acceleration of the cathode process. Nevertheless, an excessive precursor concentration leads to the destroy of the 3DOM structure. The 3DOM composite cathode exhibits the lowest Rp of 0.039 Ω cm2, and a single cell with that cathode shows maximum power density of 1484 mW cm−2 at 700 °C. The cell exhibits a short-term stability of 120 h at 700 °C without noticeable degradation.

Atomically dispersed Ru on three-dimensionally-ordered macroporous In2O3 for highly sensitive detection of triethylamine and the freshness of seafood

As a volatile organic compound, triethylamine (TEA) is extensively employed in industry. Besides, seafood releases gases such as organic amines during the spoilage process, making the detection of TEA of great significance. In this work, three-dimensionally-ordered macroporous (3DOM) indium oxide (In2O3) sensing materials decorated with ruthenium (Ru) dopants were synthesized. The TEA-sensing properties of the Ru/In2O3 were significantly improved than those of the pure In2O3 and the results reported in the literature. Notably, the 0.5Ru/In2O3 sensor had a high response (∼1943) to 50 ppm TEA at 220 °C with good selectivity, long-term stability, and fast response time. In addition, the 0.5Ru/In2O3 sensor had a response value of 14 to a low concentration of 1 ppm TEA. The exceptional TEA-sensing performance was ascribed to the remarkable pore structure of the 3DOM material, facilitating the efficient adsorption and diffusion of TEA. The atomically dispersed Ru increased the amounts of active sites, resulting in enhanced adsorbed oxygen content, reduced activation energy, and improved sensing response. Consequently, incorporating relatively cheap Ru with the 3DOM structure presents a novel approach to enhance the TEA-sensitive performance of metal oxide semiconductor sensors.

Au@ZnS core–shell nanoparticles decorated 3D hierarchical porous TiO2 photocatalysts for visible-light-driven CO2 reduction into CH4

Hereby, the core–shell structured Au@ZnS nanoparticles were precipitated on three-dimensionally ordered macro-mesoporous TiO2 (Au@ZnS/3DOMm-TiO2) by GBMR/P method. The slow photon effect of 3DOM structure leads to increase the light trapping and absorption efficiency. The hierarchical porous structure improves the specific surface area of the carrier, providing a larger internal void for desorption of reaction products and additional activation sites for the CO2 reduction. In the all-solid Z-scheme system, electrons are transferred along the direction from TiO2 to Au and finally to the surface of ZnS is realized to participate in the reaction of CO2 reduction. Under irradiation of visible light, ternary Au@ZnS/3DOMm-TiO2-2 catalyst exhibits the highest catalytic activity for CO2 photoreduction with H2O, i.e., the formation rate and selectivity of CH4 product is 33.2 µmol g-1h−1 and 91.5 %, respectively. The design of Z-scheme heterojunctions on 3D macro-mesoporous oxide surfaces are expected to expand new ideas for the preparation of efficient photocatalysts.

Three-dimensional Ordered Macroporous Flexible Electrode Design toward High-Performance Zinc-Ion Batteries.

Flexible zinc-ion batteries (ZIBs) have been considered to have huge potential in portable and wearable electronics due to their high safety, cost efficiency, and considerable energy density. Therein, the design and construction of flexible electrodes significantly determine the performance and lifespan of flexible battery devices. In this work, an ultrathin flexible three-dimensional ordered macroporous (3DOM) Sn@Zn anode (60 μm in thickness) is presented to relieve dendrite growth and expand the lifespan of flexible ZIBs. The 3DOM structure can ensure uniform electric field distribution, guide oriented zinc plating/stripping, and extend the lifespan of anodes. The rich zincophilic Sn sites on the electrode surface significantly facilitate Zn nucleation. Accordingly, a lowered nucleation overpotential of 8.9 mV and an ultralong cycling performance of 2400 h at 0.1 mA cm-2 and 0.1 mAh cm-2 are achieved in symmetric cells, and the 3DOM Sn@Zn anode can also operate in deep cycling for over 200 h at 10 mA cm-2 and 5 mAh cm-2. A flexible 3DOM MnO2/Ni cathode with a high structural stability and a high mass-specific capacity is fabricated to match with the anode to form a flexible ZIB with a total thickness of 200 μm. The flexible device delivers a high volumetric energy density of 11.76 mWh cm-3 at 100 mA gMnO2-1 and a high average open-circuit voltage of 1.5 V and exhibits high-performance power supply under deformation in practical application scenarios. This work may shed some light on the design and fabrication of flexible energy-storage devices.

Three-dimensional ordered macroporous design of heterogeneous cobalt–iron phosphides as oxygen evolution electrocatalyst

Oxygen evolution reaction (OER) plays a key role in electrochemical conversion, which needs efficient and economical electrocatalyst to boost its kinetics for large-scale application. Herein, a bimetallic CoP/FeP2 heterostructure with a three-dimensional ordered macroporous structure (3DOM-CoP/FeP2) was synthesized as an OER catalyst to demonstrate a heterogeneous engineering induction strategy. By adjusting the electron distribution and producing a lot of active sites, the heterogeneous interface enhances catalytic performance. High specific surface area is provided by the 3DOM structure. Additionally, at the solid–gas-electrolyte threephase interface, the electrocatalytic reaction exhibits good mass transfer. In sit u Raman spectroscopy characterization revealed that FeOOH and CoOOH reconstructed from CoP/FeP2 were the true OER active sites. Consequently, the 3DOM-CoP/FeP2 demonstrates superior OER activity with a low overpotentials of 300/420 mV at 10/100 mA cm–2 and meritorious OER durability. It also reveals promising performance as the overall water splitting anode.

Ca and Sr co-doping induced oxygen vacancies in 3DOM La2−xSrxCe2−yCayO7−δ catalysts for boosting low-temperature oxidative coupling of methane

It is urgent to develop catalysts with application potential for oxidative coupling of methane (OCM) at relatively lower temperature. Herein, three-dimensional ordered macroporous (3DOM) La2−xSrxCe2−yCayO7−δ (A2B2O7-type) catalysts with disordered defective cubic fluorite phased structure were successfully prepared by a colloidal crystal template method. 3DOM structure promotes the accessibility of the gaseous reactants (O2 and CH4) to the active sites. The co-doping of Ca and Sr ions in La2−xSrxCe2−yCayO7−δ catalysts improved the formation of oxygen vacancies, thereby leading to increased density of surface-active oxygen species (O2−) for the activation of CH4 and the formation of C2 products (C2H6 and C2H4). 3DOM La2−xSrxCe2−yCayO7−δ catalysts exhibit high catalytic activity for OCM at low temperature. 3DOM La1.7Sr0.3Ce1.7Ca0.3O7−δ catalyst with the highest density of O2− species exhibited the highest catalytic activity for low-temperature OCM, i.e., its CH4 conversion, selectivity and yield of C2 products at 650 °C are 32.2%, 66.1% and 21.3%, respectively. The mechanism was proposed that the increase in surface oxygen vacancies induced by the co-doping of Ca and Sr ions boosts the key step of CH bond breaking and CC bond coupling in catalyzing low-temperature OCM. It is meaningful for the development of the low-temperature and high-efficient catalysts for OCM reaction in practical application.

Cerium Doping Effect in 3DOM Perovskite-Type La2−xCexCoNiO6 Catalysts for Boosting Soot Oxidation

Herein, we present an in-depth investigation into the enhancement of catalytic soot oxidation through cerium-doped three-dimensional ordered macroporous (3DOM) La-Co-Ni-based perovskites synthesized with the colloidal crystal template (CCT) method. The 3DOM structure significantly contributes to the accessibility and interaction efficiency between soot and catalyst. Based on the results of powder X-ray diffraction (XRD), N2 adsorption-desorption measurements, scanning electron microscopy (SEM), temperature-programmed oxidation of NO (NO-TPO), temperature-programmed reduction of H2 (H2-TPR), in situ infrared Fourier transform spectroscopy (In-situ DRIFTS), and temperature-programmed oxidation (TPO) reactions, the role of cerium doping in modifying the structural and catalytic properties of 3DOM perovskite-type La2−xCexCoNiO6 catalysts was investigated systematically. The optimized cerium doping ratio in La2−xCexCoNiO6 catalysts can improve the microenvironment for efficient soot-catalyst contact, enhancing the catalytic activity of soot oxidation. Among the catalysts, the 3DOM La0.8Ce1.2CoNiO6 catalyst shows the highest catalytic activity for soot oxidation, whose T10, T50, and T90 values are 306 °C, 356 °C, and 402 °C, respectively. The mechanism of the cerium doping effect for boosting soot oxidation is proposed: The doping of Ce ions can increase the surface oxygen species, which is the main active species for promoting the key step of NO oxidation to NO2 in catalyzing soot oxidation. This research provides a new strategy to develop high-efficient non-noble metal catalysts for soot oxidation in pollution control and sustainable environmental practices.

Three-dimensionally ordered porous In-doped SmFeO3 perovskite gas sensor for highly sensitive and selective detection of formaldehyde

This article presents the fabrication and characterization of a three-dimensional ordered macroporous (3DOM) indium-doped samarium iron oxide (SmFeO3) gas sensor for formaldehyde detection. The 3DOM structure, achieved using a polymethylmethacrylate (PMMA) template, provides a high specific surface area (SSA) and facilitates gas diffusion. The effect of indium doping on the sensing performance of SmFeO3 is investigated, by modulation of the band gap at the appropriate value of 3.88 eV. Structural and morphological characterization using X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM) confirms the orthorhombic perovskite and highly ordered inverse opal structure of the synthesized materials. The gas sensing measurements indicate the enhanced formaldehyde sensing ability of the 3DOM 1.5%In-doped SmFeO3 gas sensor. A high response value of 9.05 towards 10 ppm formaldehyde was obtained at 210 °C, which was about 8 times higher than the reference sample. Moreover, the selectivity test reveals the improved performance of the 3DOM 1.5%In-doped SmFeO3 gas sensor to formaldehyde rather than ethanol, methanol, and acetone. Further BET and XPS analysis suggest that improved sensitivity can be related to the perfect SSA of 130.81 m2/g and high oxygen vacancies. This study provides valuable insights into the development of highly sensitive and selective formaldehyde gas sensors.

Three-dimensionally ordered macroporous ZSM-5 zeolite supported high-dispersed Ni2P: Highly active catalyst for quinoline hydrodenitrogenation

Zeolite catalysts have shown significant advantages in hydrogenation reactions due to their ordered pore structure and abundant acid sites. Common zeolites exhibit pore accessibility limited to microporous states, which restricts their application in diffusion-limited processes. In this study, a steam-seeding-assisted colloidal crystal template (SSAC) method was used to prepare ZSM-5 zeolite with a three-dimensionally ordered macroporous (3DOM) structure, which was then loaded with nickel phosphide for hydrodenitrogenation reactions. SEM and TEM characterization demonstrated that the prepared zeolite material possessed a highly ordered 3DOM structure with interconnected macropores. XRD, FT-IR, and BET analysis indicated that the macroporous zeolite material exhibited a typical MFI structure, mesoporous channels, and a higher specific surface area. The high external surface area facilitated the formation of uniformly sized Ni2P nanoparticles on the zeolite surface. The introduction of macroporous structures also leads to suitable Brönsted acid and Lewis acid sites in zeolite materials. The resultant Ni2P/3DOMZSM-5 catalyst exhibited higher reaction rate constants and TOF (10.87×10−2 μmolg−1s−1 and 1.5×10−3s−1, respectively) compared to other zeolite catalysts and commercial catalysts.

3DOM BiOI/TiO2 composites modified by metal Ag with broad spectrum response for photocatalytic degradation and water splitting

In order to improve the photocatalytic performance of TiO2 and expand its absorption range in the visible light region, depositing noble metals, constructing the p-n heterojunction and controlling the morphology were used to modify TiO2. First, the TiO2 photocatalyst with a three-dimensional ordered macroporous structure was prepared by vacuum impregnation combined with calcination, and then the 3DOM Ag/BiOI/TiO2 composites were successfully prepared by the in-situ deposition and photoreduction. The characterization results show that the composites present a large number of open and transparent pore structures. The pore wall is formed by stacking TiO2 nanoparticles, with BiOI and Ag nanoparticles evenly distributed on the surface of the pore wall and in the macroporous framework, which expands the specific surface area of 3DOM TiO2 and provides more active sites for the reaction. The introduction of BiOI and Ag expands the visible light response range and improves the light utilization efficiency. Furthermore, the formation of the Schottky barrier and the internal electric field formed by the p–n heterojunction effectively promotes the interfacial electron transfer and suppress the electron–hole recombination, thereby generating more active species during the photocatalytic process. The experimental results of multi-mode photocatalytic degradation of methyl orange (MO) also show that 3DOM Ag/BiOI/TiO2 photocatalyst has the best photocatalytic degradation activity. In addition, different samples were tested for hydrogen production by photolysis of water under simulated sunlight conditions, and the results show that 3DOM Ag/BiOI/TiO2 has the best hydrogen production ability of photolysis of water. The excellent performance of multi-modal photocatalytic degradation of organic pollution and high photohydrogen production activity in 3DOM Ag/BiOI/TiO2 composites is attributed to the synergistic effect between the introduction of metallic Ag, the unique 3DOM structure, and the p–n heterojunction.

Enhanced VOCs adsorption and oxidation by hydrophobic-layer-modified YMn2O5 mullite catalyst with ultralow single-atom Pt loading

Hydrophobic-layer-modified mullite YMn2O5 catalysts with ultralow single-atom Pt loadings and three-dimensionally ordered macroporous (3DOM) structures (denoted as × wt% Pt/YMO/Ph-3DOM) were synthesized via a facile strategy and assessed for toluene oxidation. The 3DOM structure provides a large surface area, while the ultralow Pt doping (0.1 wt%) reduces catalyst costs, improves low-temperature reducibility, and provides more oxygen vacancies, which are beneficial for O2 adsorption and activation. Surface modification with phenyltriethoxysilane significantly improves activity under wet conditions and promotes the adsorption of toluene. 0.1 wt% Pt/YMO/Ph-3DOM achieves 100% toluene oxidation at 160 °C at a WHSV of 36,000 mL g−1h−1 under wet conditions. In-situ DRIFTS experiments were carried out to investigate the reaction mechanism. Furthermore, DFT calculations were used to investigate the adsorption and activation of O2, toluene, and the intermediates on the catalyst surface, providing new insight into VOC oxidation for future investigations.

A highly efficient Ni/3DOM-La2O2CO3 catalyst with ordered macroporous structure for CO2 methanation

The global focus on new energy sources and energy storage methods has prompted significant research interest. Ni-based catalysts for CO2 methanation have the potential for industrialization, but face challenges such as high-temperature sintering, carbon deposition, and unstable catalytic activity; of which similar problems exist in NH3 decomposition reactions. A 10%Ni/3DOM-La2O2CO3 catalyst, featuring a three-dimensional ordered macroporous (3DOM) structure, demonstrated competitive low-temperature catalytic performance in CO2 methanation through formate intermediates. Comprehensive characterizations revealed improved Ni dispersion and carbon deposition prevention due to the 3DOM structure, enhancing catalytic activity. This structural advantage also translated to improved performance in ammonia decomposition.

Honeycomb-like 3D ordered macroporous SiOx/C nanoarchitectures with carbon coating for high-performance lithium storage

SiOx anodes are garnering significant interest in lithium-ion batteries (LIBs) due to theirs low voltage plateau and high capacity. However, critical drawbacks, including high expansion rate and low electronic conductivity, severely limit their practical applications. While 0D, 1D, and 2D scale nanostructures have been proven to mitigate these issues, these materials tend to accumulate after prolonged cycling, leading to adverse effects on the mass transfer processes within the electrode. Herein, we have developed a honeycomb-like SiOx/C nanoarchitecture with carbon coating based on a 3D ordered macroporous (3DOM) structure. The 3D interconnected pore windows facilitate the diffusion and transport of lithium ions (Li+) in the electrolyte, and the extremely thin walls (<15 nm) provide a shorter transport path for Li+ in the solid. The carbon cladding buffers volume expansion and enhances electronic conductivity. The as-prepared anode demonstrates a high reversible capacity of 1068 mAh/g and an initial coulombic efficiency of 70.7 %. It maintains a capacity of 644 mAh/g (capacity retention of 84.63 %) even at a high current of 1.0 A/g after 700 cycles. The unique honeycomb-like structure offers enormous insights into the study of energy storage in 3D materials.

Wastewater flocculation substrate derived three-dimensional ordered macroporous Co single-atom catalyst for singlet oxygen-dominated peroxymonosulfate activation

Herein, wastewater flocculation substrate is used as a carbon source to prepare a three-dimensional ordered macroporous (3DOM) structure carbon-based catalyst with the CoN4 coordination active sites (Co-NC-PS) through a hard-template strategy. Abundant single-atom CoN4 active sites endow the Co-NC-PS with splendid performance in degrading organic pollutants by activating peroxymonosulfate (PMS). Experiment results show that the singlet oxygen (1O2) is the main reactive oxygen species (ROSs) for bisphenol A (BPA) degradation. The strong coordination of Co atoms with N atoms not merely avoids the leaching of Co and improves the stability of the catalyst but also establishes stable adsorption configuration and facilitates the generation of 1O2 proven by density functional theory (DFT) calculations. This study provides the design of efficient Co carbon-based catalysts in mint conditions with high stability for water treatment, as well as a new idea for the preparation of high-value-added products from the recycling of flocculated waste.

Promotion of oxygen vacancies and metal-support interaction over 3DOM Au/CeO2 catalyst for CO oxidation

CO oxidation is the primary approach for eliminating CO from incomplete combustion, and the catalytic performance is dependent on the structure of catalysts. Herein, to explore the structure promotion in the CO oxidation reaction, polymethyl methacrylate was synthesized as the hard template to fabricate the three-dimensional ordered microporous (3DOM) Au/CeO2 and compared the catalytic performance with the Au/CeO2 rod catalyst. The 3DOM Au/CeO2 catalyst could realize complete CO oxidation at 90 °C while 110 °C for Au/CeO2 rod catalyst. The 3DOM Au/CeO2 catalyst also showed outstanding stability for 60 h reaction. The achieved high performance could be attributed to the pore structures and the better metal-support interaction that facilitates abundant oxygen vacancies. Additionally, the Au distribution and oxygen vacancies promoted by the macropores structures were discovered using a series of characterizations. This work highlights the promotion of oxygen vacancies and metal-support interaction by 3DOM structure in CO oxidation reaction.

Utilizing three-dimensional ordered macroporous NiFe2O4 Loaded With g-C3N4 as a heterogeneous photo-Fenton catalyst for tetracycline degradation

Heterogeneous photo-Fenton technology, efficiently utilizing the solar energy and hydrogen peroxide, which combines photocatalysis and Fenton reaction, is one of the most efficient methods for eliminating organic contaminants. Here, graphitic carbon nitride (CN) and three-dimensionally ordered macroporous (3DOM) nickel ferrite (NFO) were combined to create highly catalytically active CN/3DOM-NFO composites. The composites were characterized with XRD, SEM, TEM, HRTEM, XPS, BET, DRS, and PL. And tetracycline (TC) photo-Fenton degradation catalytic activity of the composites was evaluated. The results showed that under visible light irradiation, the maximum rate constants of TC degradation of 10CN/3DOM-NFO were 7.3 times and 5.4 times that of pure g-C3N4 and bulk NFO, respectively. The optimum apparent reaction rate constant can reach as high as 0.0618 min−1 due to the synergistic interaction between the increased specific area and excellent charge carrier separation and transfer capabilities, resulting from the CN/3DOM-NFO heterojunction and the 3DOM structure, respectively. Finally, the mechanism of photo-Fenton-catalyzed degradation is briefly discussed. And this research reveals a new strategy to improve the efficiency of photo-Fenton-catalyzed degradation.